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Ahmed, Mohamed E. "PORTABLE MEDICAL INSTRUMENT FOR OBJECTIVELY DIAGNOSING HUMAN TINNITUS". OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/165.
Pełny tekst źródłaMares, David M. "Developmental laboratories for biomedical instrumentation and digital signal processing with virtual instrument technology and diverse software techniques". Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1292461511&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Pełny tekst źródłaLomas, Martin. "The development of high performance scanning probe microscopes for biomedical applications". Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298050.
Pełny tekst źródłaLarsson, Marcus. "Influence of optical properties on Laser Doppler Flowmetry /". Linköping : Univ, 2004. http://www.bibl.liu.se/liupubl/disp/disp2004/tek914s.pdf.
Pełny tekst źródłaTweedie, Richard John. "Conception, design and development of the Impulse Response Impedance Spectroscopy instrument". Thesis, University of Dundee, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242447.
Pełny tekst źródłaYao, Hsin-Yun 1974. "Touch magnifying instrument applied to minimally invasive surgery". Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81578.
Pełny tekst źródłaWilliams, Robin Bede. "An instrument for the measurement of body/support interface stresses : with particular application to below-knee prostheses". Thesis, King's College London (University of London), 1993. https://kclpure.kcl.ac.uk/portal/en/theses/an-instrument-for-the-measurement-of-bodysupport-interface-stresses--with-particular-application-to-belowknee-prostheses(75e24619-efdb-4d71-bd55-2080cf733aea).html.
Pełny tekst źródłaSmith, Heather D. "Designing an Instrument Based nn Native Fluorescence to Determine Soil Microbial Content at a Mars Analog Site". DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/614.
Pełny tekst źródłaSaez, Miguel Angel. "Micro-forging technique for rapid, low-cost manufacture of lens array molds and its application in a biomedical instrument". Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40478.
Pełny tekst źródłaIncludes bibliographical references (leaves 46-48).
Interest in micro-optical components for applications ranging from telecommunications to the life sciences has driven the need for accessible, low-cost fabrication techniques. Most micro-lens fabrication processes are unsuitable for applications requiring 100% fill factor, apertures around 1 mm, and scalability to large areas with millions of lenses. A flexible, low-cost mold fabrication technique that utilizes a combination of milling and micro-forging is reported. The technique involves first performing a rough cut with a ball-end mill. Final shape and sag height are then achieved by pressing a sphere of equal diameter into the milled divot. Using this process, molds were fabricated for rectangular arrays of 1-10,000 lenses with apertures of 0.25-1.6 mm, sag heights of 3-130 [mu]m, inter-lens spacings of 0.25-2 mm, and fill factors of 0-100%. Mold profiles have roughness and figure error of 68 nm and 354 nm, respectively, for 100% fill factor, 1 mm aperture square lenses. The required forging force was modeled as a modified open-die forging process and experimentally verified to increase nearly linearly with surface area.
(cont.) The optical performance of lens arrays injection molded from micro-forged molds was characterized by imaging the point spread function, and was found to be in the range of theoretical values. Limitations include milling machine range and accuracy. Application to biological fluorescence detection in a biomedical device is also reported.
by Miguel Angel Saez.
S.B.
Bonilla, Guerrero Jader Alfredo. "Jämförelse av natrium-resultat mellan patientnära instrument (GEM Premier 5000) och central laboratoriet instrument (Advia Chemistry XPT) på Universitetssjukhus Örebro. Finns det signifikant skillnad?" Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-92908.
Pełny tekst źródłaBackground: Sodium (Na +) is an important electrolyte in the body, and is analyzed, among other things, to be able to assess the patient's condition in the intensive care unit (IVA) and to determine if emergency treatment is necessary. The analysis of Na + on IVA is done with the help of GEM Premier 5000, which is a patient-centered instrument and uses a direct method for analysis of whole blood. For patient sample comparison, the sample is sent to the central laboratory where the plasma is analyzed by indirect method on Advia Chemistry XPT. Deviation between the methods must not exceed 3%, otherwise the cause must be investigated. Aim: The aim of the study is to investigate whether there is a systematic difference in Sodium results between patient-related instruments, Gem Premier 5000 and the central laboratory's instrument, Advia Chemistry XPT in different patient groups. Method: Measurement was performed on blood samples taken in Lithium Heparin tubes of 60 participants, of which 30 were healthy blood donors (group 1) and the remaining 30 consisted of inpatients (IVA) and kidney dialysis patients, (group 2). The samples were analyzed for sodium on GEM Premier 5000 and shortly thereafter for sodium, albumin, total protein, C-reactive protein (CRP), glucose and triglycerides on Advia Chemistry XPT. Results: Advia Chemistry XPT gave a higher concentration of Na + (139 mmol / L) than GEM Premier 5000 (138 mmol / L) for all participants. The percentage difference of Na between the methods differed for 3 participants in group 1 while it differed for half of the participants in group 2. Conclusion: Na + results on Advia Chemistry XPT were higher than on GEM Premier 5000 for all participants. The difference was greater in patients with a high degree of morbidity. This suggests that the current acceptable deviation of 3% should be increased to 5%, in order to reduce the number of deviating values to almost the same for both groups. This must be taken into account and implemented in the business.
Besar, Serry Shehata Ali. "Two new instruments for biomedical applications". Thesis, University of Kent, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236862.
Pełny tekst źródłaPunter, Villagrasa Jaime. "Bioimpedance monitoring system for pervasive biomedical applications". Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396086.
Pełny tekst źródłaL’objectiu de la tesi és la realització d’equipaments electrònics per aplicacions biomèdiques de caràcter Poin-of-Care en entorns d’investigació, control i tractament clínic. Aquest projecte es troba en el marc de les activitats de recerca del grup, on el desenvolupament d’electròniques d’interface amb el mon biomèdic i la recerca de noves tecnologies i aplicacions d’instrumentació són unes de les principals tasques que porten a terme. Donades aquestes consideracions, a l’últim any s’ha definit un camí dintre dels sistemes d’instrumentació PoC orientats al control d’agents biològics cel·lulars amb tècniques d’anàlisi d’impedància. Aquests dispositius estan basats en dos conceptes claus: el disseny d’instrumentació electrònica senzilla, econòmica i de baix consum, així com sistemes de sensat versàtils i d’un sol us. D’aquesta manera, és possible desenvolupar equipaments versàtils, portables i de baix cost que poden aportar gran rendiment en diferents camps de la biomedicina. Amb aquestes premisses, s’ha desenvolupat un equipament d’anàlisi d’impedància independent del sistema de sensat, el que comporta la possibilitat d’utilitzar multitud de tipus de sistemes de sensat. Aquest equipament, consta d’una senzilla instrumentació electrònica basada en un sistema de sensat preparat per diferents tipus de sensors, tot controlat per un microprocessador encarregat del control automatitzat del hardware, post-processat de dades i comunicació amb un ordinador remot. El sistema és capaç de treballar en un rang de freqüències molt ampli, amb diferent tipus de potència de senyal i diferent tipus d’anàlisi i representació, com ara Electrochemical Impedance Spectroscopy (EIS) amb representació amb diagrames de Bode i Nyquist, o la selecció de punts de freqüencials concrets per un tipus d’anàlisi més específic per a un experiment biomèdic més concret, senzill i ràpid. Es tracta d’un equipament econòmic, fiable i senzill per l’anàlisi d’hematòcrit, que aporta avenços com la gran capacitat d’integració en ambients clínics, la possibilitat de fer un control medico sanitari instantani i reportar telemàticament els resultats o la possibilitat d’implementar un sistema de control mèdic integrat i automatitzat.
Akanle, Olufunso Akinbode. "Instrumental nuclear activation techniques and applications to biomedical problems". Thesis, University of Surrey, 1987. http://epubs.surrey.ac.uk/847146/.
Pełny tekst źródłaBottesi, Carlos Carneiro. "Sistema modular didatico para transdução e medidas de grandezas biomedicas". [s.n.], 1993. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261633.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica
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Resumo: Com a finalidade de servir de apoio didático às disciplinas relacionadas com Transdução e Medidas de Grandezas Biomédicas, oferecidas regularmente aos alunos de graduação, pós-graduação e extensão, pelo Departamento de Engenharia Biomédica (DEB) da Faculdade de Engenharia Elétrica da UNICAMP, foi desenvolvidoum SISTEMA MODULAR PARA TRANSDUÇÃO E MEDIDASDE RANDEZASBIOMÉDICAS. Este equipamento é composto por: . Módulos de registro e apresentação de dados - Voltímetro Digital de 3 1/2 dígitos e Detector de Pulsos. . Módulos Fonte - Fontes estabilizadas de corrente contínua de :t I5V / 3A e :t 5V / IA, fonte de corrente constante e fonte de tensão variável para transdutores em ponte. . Módulos de Processamento de Sinal - Pré Amplificadores AC e DC, Amplificadores de Áudio e de Potência, Filtros Passa Baixas e Rejeita Faixas. . Módulos de Transdução - Transdutores de pressão, biopotenciais, temperatura, sons e fluxo. o usuário tem então condições de sintetizar diversos equipamentos biomédicos, de uso freqüente na prática clínica,com vantagens pedagógicas e econômicas
Mestrado
Mestre em Engenharia Elétrica
Albrecht, Lucimara. "Máquinas lavadoras ultrassônicas de instrumentos odontológicos, médicos e cirúrgicos: avaliação do desempenho do processo de limpeza". Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/517.
Pełny tekst źródłaThe cleaning of dental, medical and surgical instruments (DMSI) with ultrasonic cleaning equipment (UCE) makes use of mechanical (sound vibrations – cavitation), chemical (detergent solutions) and thermal (temperature) energies associated with exposure time. To check the performance of the cleaning process it is necessary the use of tests recommended by international standards. In this study we have evaluated the performance of UCE concerning its minimal acceptable parameters by means of tests described on standards as well as discussing the interfering factors which could compromise the cleaning process of DMSI. Initially, a survey analyzed the operating conditions of UEC through a questionnaire answered by professionals of several health care establishments (HCE) of Curitiba city. The results showed wide use of UCE in the investigated HCE, technical procedures for preparation of the cleaning process, time/temperature relationship and load cycle profiles according to literature recommendations. However there was no agreement on the type test selection or adoption of technical standards. Considering those results, practical tests were carried out for aluminium foils and strips, Sono Check® chemical indicators and TOSI® Lum Check for cannulated instruments, based on international standards. Aluminium foils (100%) and strips (89%) have showed uniformity in the produced holes, indicating efficiency of the cavitation. Some strips presented few modifications (11%), indicating failures in the test and/or functioning of the equipment. Chemical indicators Sono Check®| presented positive results (75%) proving the effectiveness of ultrasonic activity, however some (25%) presented negative results indicating blind spots due to difficulties in the cavitation process, which can be attributed to interfering factors such as: use the same cleaning solution in several cycles, type and disposition of the load, level of the solution in the tank, temperature and divergence of ultrasonic waves between instrument and walls of the equipment. TOSI® Lum Check for cannulated instruments showed negative results which can be attributed to reduced exposure time, not adequate temperature, water quality, incorrect dilution of the cleaning solution, test bad positioned, overload and/or incorrect load of the instruments, and inefficiency of the cleaning solution. It was concluded that the control tests can prove the effectiveness of the ultrasound in the cleaning activity and detect performance failures for UCE assigned to the cited interfering factors. Therefore, it is recommended the development of a technical standard in Brazil which should include types of tests, procedures and operational control of the cycle parameters in order to ensure the quality control of the ultrasonic cleaning process.
Silveira, Ana Carolina. "Gerenciamento de tecnologia para saúde = classificação de equipamentos médico-hospitalares". [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261485.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
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Resumo: Neste trabalho foi descrito o desenvolvimento e a aplicação de um método para classificação de equipamentos médicos considerando dados de manutenção corretiva. O método foi desenvolvido para auxiliar os engenheiros clínicos no gerenciamento das tecnologias médicas. Os três indicadores utilizados foram tempo gasto com manutenção corretiva (TMc), custo de manutenção corretiva ($Mc) e número de manutenções corretivas (NCc). Os indicadores foram obtidos da base de dados do Centro de Engenharia Biomédica (CEB) da Universidade Estadual de Campinas (UNICAMP) no período de 2004 a 2006. Foram estudados os seguintes grupos de equipamentos: 1) Bomba de infusão tipo seringa; 2) Bomba de infusão de uso geral; 3) Monitores cardíacos e multiparamétricos; 4) Ventiladores pulmonares e 5) grupo heterogêneo composto por diferentes grupos de equipamentos, participando todos dos grupos de 1 a 5, incluindo aparelhos de anestesia, unidades eletrocirúrgicas e desfibriladores/cardioversores. O método baseia-se na hipótese de que a idade do equipamento é um fator determinante para o aumento dos três indicadores estudados. Os resultados confirmam essa hipótese e a classificação revelou diferenças importantes entre marcas/modelos dos equipamentos de um determinado grupo. Além disso, o método mostrou-se aplicável para grupos homogêneos ou heterogêneos de equipamentos. A classificação proposta pode ser utilizada na gestão de equipamentos médicos, gerando alertas que contribuam para a tomada de decisão pelo engenheiro clínico e a fiscalização por parte de agências reguladoras governamentais.
Abstract: This work describes the development and implementation of a method for classification of medical devices based on corrective maintenance data. The method was developed to assist clinical engineers in the management of medical technologies. The three indicators used were time spent on corrective maintenance (TMc), cost of corrective maintenance ($Mc) and number of corrective maintenance events (NCc). Indicators were obtained from the database of the Center for Biomedical Engineering (CEB), Universidade Estadual de Campinas (UNICAMP) from 2004 to 2006. The following groups of medical devices were studied: 1) syringe infusion pump; 2) general use infusion pump; 3) multiparametric and cardiac monitors; 4) lung ventilators and 5) heterogeneous group composed of different types of equipment, all from groups 1 to 5 plus, anesthesia machines, electrosurgical units and defibrillator / cardioverter. The method relies on the hypothesis that equipment age is a determining factor for the increase of the three indicators studied. The results confirmed this hypothesis, and the classification revealed important differences among brands/models of equipment of a given group. Moreover, it was shown to be possible to apply this method for both homogeneous and heterogeneous groups of equipment. The proposed classification may be used in the management of medical equipment, generating alerts that may contribute to decision making by local clinical engineering teams and government regulatory agencies.
Mestrado
Engenharia Biomedica
Mestre em Engenharia Elétrica
Stegman, Jacob J. "Patient-Specific Instruments for Total Hip Arthroplasty". University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491307452581547.
Pełny tekst źródłaBowles, Roger A. "Hiring preferences of employers of entry-level biomedical equipment technicians in Texas". Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5478/.
Pełny tekst źródłaLosso, Elenize. "Proposta de um adaptador para pressão positiva em cânula metálica conectada à válvula exalatória". Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/2041.
Pełny tekst źródłaTracheostomy is an artificial airway which can be made by plastic or metal cannula. For applying treatment with positive pressure it needs an adapter connector. Objective: to create a connector to be attached between the metal cannula and the exhalation valve. Method: for the connector device, three models have been developed, from the dimensions of a metal cannula number 5 and two exhalation valves. The first two models were machined with polyamide material, having the first one funnel-shaped with an angle of 140° closed to the end connectable to the cannula; the second having predominantly conical shape and angular opening of 2°. The third prototype was built similarly to the second model. However, it is made by resin and produced on a 3D printer. Connectors were tested with two exhalation valves, made of acrylic and identified as I and II. Valve I is a tube with an exhalation hole and an inlet for oxygen therapy. Valve II contains two dockable continuous drain pipes. The evaluation tests involved: leakage analysis using positive pressure generator set at 7.5, 13 and 20 cmH2O for 1-2 h, in an analog lung model; input and output pressure measurements; destructive mechanical testing; computer-based flow simulation and reaction to sterilization. Results: it was obtained a higher flow velocity along the upper airway path till the left bronchus and distal to the air. Destructive testing reached maximum stresses of 71.43 and 75.44 MPa for the samples 1 and 2, respectively. Flow leaks' measurements had shown lower average for the combination of resin with exhalation valve I (18.8 (± 10.78) l/m). For the measures of input pressure and output of the generator, the error was found to be 4.48 % on the values of the three applied pressures. Regarding sterilization, the procedure with ethylene oxide has affected the dimensions and functionality of the resin-based device, but the machined prototypes remained unchanged. Concerning the hydrogen peroxide and autoclaving procedures, there was no change on the resin model ́s functionality. Conclusions: with relation to the flow leaks, the combination where occurred the least leaks was the resin based device with valve I. The machined connector, which was sterilized only with ethylene oxide, remained unchanged after the procedure. The prototype which was submitted to ethylene oxide, hydrogen peroxide and autoclave, had introduced dimensional and functional changes with the ethylene oxide. As for the flow leak, the best solution is the combination of the resin-based connector with valve I, demanding less of the compensation system. For conclusive results, in vivo essays are expected.
Ferreyra, Ramirez Ernesto Fernando. "Metodologia de priorização de equipamentos medicos para programas de manutenção preventiva em hospitais". [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259864.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
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Resumo: Atualmente, as pressões para aumento da segurança e disponibilidade dos equipamentos médicos, e a limitação de recursos humanos e financeiros têm mostrado a necessidade de implantação de programas de manutenção preventiva. O alto custo deste tipo de manutenção obriga o desenvolvimento de programas que priorizem os equipamentos nos hospitais brasileiros. Este trabalho propõe uma metodologia para suprir esta necessidade. A metodologia proposta considera os fatores: I)Risco para o paciente e usuário do equipamento; 2)Importância estratégica do equipamento e Recomendações do fabricante e órgãos fiscalizadores; 3)Análise da viabilidade de manutenção preventiva; e 4)Análise periódica do histórico de falhas e consertos dos equipamentos. A estes fatores são atribuídos pontos, de modo a formar um número de prioridade (PE). Os resultados encontrados em um estudo de caso efetuado mostram que a metodologia é condizente com a realidade nacional devido à sua facilidade de implementação mesmo para o caso em que não haja dados anteriores sobre o histórico
Abstract: Nowadays, the increasing need of improving the safety and the availability of medical equipment, and the restrictions of human and financial resources have shown the importance of implementation of preventive maintenance programs. The high costs of this type of maintenance lead to the development of equipment prioritizing programs in the Brazilian hospitaIs. This work suggests a methodology to fuifiII this need. The proposed methodology considers the factors: 1) Physical Risk to the patient and to the user; 2) Equipment strategic importance and manufacturers' and accreditation entities recommendations; 3) Viability analysis of the preventive maintenance; and 4)Periodic analysis of the equipment failures and repair history. These factors receive ponderation in order to achieve an equipment priority number (PE). The results found in a case study showed the proposed methodology agrees with the national reality because it's easy to implement though the equipment maintenance history data were limited.
Mestrado
Engenharia Biomedica
Mestre em Engenharia Elétrica
Oshiyama, Natália Ferreira 1985. "Identificação de inconsistências e indeterminações na classificação de equipamentos médico-hospitalares = lógica paraconsistente anotada". [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259391.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
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Resumo: O constante avanço tecnológico faz com que uma grande variedade de equipamentos médico-hospitalares esteja disponível no mercado e, cada vez mais, o corpo clínico torna-se dependente dessas novas tecnologias para tratar os pacientes de maneira mais segura e eficiente. No cenário do sistema de saúde atual, em que os recursos financeiros passaram a ser mais controlados, o gerenciamento de tecnologia tem ganhado crescente importância. No entanto, mesmo com disponibilidade de dados históricos de manutenção, os engenheiros clínicos têm dificuldades em realizar o gerenciamento com base nos dados quantitativos concretos do banco de dados, o que os leva freqüentemente a basear-se em sua experiência profissional para a tomada de decisões. Este trabalho teve como objetivo desenvolver uma metodologia de classificação de equipamentos baseada nos requerimentos de manutenção corretiva, levando em conta o número e duração de ocorrências, bem como o custo deste tipo de serviço. As classes de equipamentos foram estabelecidas por meio da análise Always Better Control (ABC). Em seguida, foi utilizada a lógica paraconsistente anotada (LPA) para identificar inconsistências e/ou indeterminações que poderiam surgir no estabelecimento das classes de equipamentos. Como aproximadamente 90% das classificações não apresentaram inconsistências e/ou indeterminações, pode-se dizer que a classificação foi desenvolvida de maneira coerente e pode ser utilizada como ferramenta de auxílio ao gerenciamento diário de manutenções, realizado pelos engenheiros clínicos, planejamento de aquisição e substituição de equipamentos, data mining por fabricantes e até mesmo por órgãos governamentais e agências reguladoras. Por outro lado, inconsistências e/ou indeterminações detectadas com a LPA indicam à equipe de engenharia clínica os casos que requerem uma análise post-hoc mais detalhada
Abstract: Current technological development increases the variety of medical equipment available to the market, which turns physicians dependent on the new technologies for safer and more efficient treatment of patients. As a result of the rapid technological advance and rigid control of financial resources in the current healthcare system, medical technology management has become more important. Nonetheless, even with historical maintenance data available, clinical engineers have difficulty in performing management based on the quantitative and concrete information in the database, and usually employ their professional experience for decision making. This work describes a methodology for classification of medical equipment based on some requirements for corrective maintenance: failure frequency, time and cost of this kind of service. Equipment classes were established using the Always Better Control analysis (ABC). The paraconsistent annotated logic (PAL) was used to identify inconsistencies and indeterminacies that might arise from the equipment classification. As almost 90% of the classifications did not present inconsistencies and/or indeterminacies, it is possible to conclude that the classification was coherent and may be used as a tool for helping clinical engineers on daily management work, new equipment acquisition and replacement planning, data mining for equipment manufacturers and by governmental and regulatory agencies. On the other hand, the inconsistencies and/or indeterminacies detected with PAL may point out to the clinical engineering team specific equipments that require a more detailed, post-hoc, case analysis
Mestrado
Engenharia Biomedica
Mestre em Engenharia Elétrica
Andrade, Luiz Augusto Kalva de. "Sistema de medição para oximetria de pulso". Universidade Tecnológica Federal do Paraná, 2009. http://repositorio.utfpr.edu.br/jspui/handle/1/912.
Pełny tekst źródłaThe main subject of this research is the development of a measurement system for pulse oximetry in order to determine oxygen arterial saturation. The measurement of blood oxygen saturation is recognized as a world standard in anesthesiology care, being used in intensive care units as well as in veterinary surgery. The developed oximetry system employs a transmittance probe using light emitting diodes and a photo detector as main components. The instrument is also composed by a transimpedance amplifier, demux and sample-and-hold circuits, pass-band filters, digitally controlled amplifier and a digital signal processor. The functioning results of the prototype were confirmed by using a commercial pulse oximeter simulator, obtaining a coefficient r = 0.99954 between the oxygen saturation data. Also, in vivo results obtained were compared with a commercial pulse oximeter showing mean differences of ±1.67% for percentage saturation data and ±1.44 beats per minute for heart rate. It is hoped that this work can help to improve the oxygen monitoring to body tissues and to make pulse oximetry a more common and accessible monitoring technique.
Carneiro, Denise de Oliveira. "Medidas de duração de consoantes oclusivas como vestígios de fala em análise acústico-instrumental forense de amostras com e sem uso de disfarce". Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1878.
Pełny tekst źródłaAuthorship attribution of speech, from environmental recordings and telephone interceptions, which can be evidence of crimes related to drug dealing, racketeering, kidnapping, sexual abuse, pedophilia, and corruption, may present difficulties to experts in obtaining acoustic measures. One of these difficulties may be the use of disguise. With the possibility of being recorded, voice disguise has become common among crime perpetrators. When a voice is recorded, it can be an evidence after speaker comparison examination (SCE), which adopts methodologies to determine whether two speech samples have been produced by the same speaker. SCE can be perceptual, acoustic-instrumental and through automatic recognition. Although automatic recognition technologies have already been developed, analyses without human interference do not have enough support, both for poor signal quality or for lack of speech samples. Therefore, research that is anchored in other analysis methods are essential. Acoustic-instrumental analyses use computational tools for quantitative and qualitative evaluation of speech, and biomedical engineering enables the development of technologies and instrumentation for speech signal analyses. In search of an acoustic parameter that is robust in disguise analyses, this research used segment phase measurements, which have been little explored in SCE. Brazilian Portuguese voiceless stops [p, t, k] are produced in three distinct phases: occlusion phase, release phase and formant transition. The first two phases have acoustic correlates that are visually distinct in the oscillogram: relative silence and aperiodic wave production. In this research, the speech of 20 subjects were instrumentally analyzed, 10 males and 10 females, aged between 25 and 55 years, while reading, with and without the use of disguise, a text that simulated a criminal situation. Occlusion and release duration of the voiceless stop consonants were measured and it was found that the phonological context influences the production time. Different measures were found between the first and the second reading with disguised voice, indicating that the speaker had difficulty in maintaining the phonation setting, and that, although there were differences between the measures in speech with and without disguise, the correlation between them was strong. Occlusion time appeared to be less influenced by the use of disguise for the syllables [pi, pu, te, tɛ], while the release time showed greater susceptibility, except for [pi, te]. The results allow that some of the segments analyzed be considered vestiges of authorship within a body of evidence.
Abolfathi, Puya Peter. "Development of an instrumented and powered exoskeletion for the rehabilitation of the hand". Connect to full text, 2007. http://ses.library.usyd.edu.au/handle/2123/3690.
Pełny tekst źródłaIncludes graphs and tables. Includes list of publications co-authored with others. Title from title screen (viewed November 28, 2008) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Aerospace, Mechanical and Mechatronic Engineering, Faculty of Engineering and Information Technologies. Degree awarded 2008; thesis submitted 2007. Includes bibliographical references. Also available in print form.
Breivik, Jarle. "Leadership and organization change in biomedical PhD education| An instrumental case study of the development of a centralized organization for biomedical graduate studies at the University of Pennsylvania". Thesis, University of Pennsylvania, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3639020.
Pełny tekst źródłaBiomedical PhD education is a large and increasingly interdisciplinary segment of higher education. The primarily laboratory-based research training is commonly distributed to a range of administrative units within and outside the research-intensive universities. This organizational fragmentation represents a significant challenge to coordination, oversight, and quality development. The University of Pennsylvania was one of the first institutions to establish a centralized, umbrella-type biomedical graduate program to address these organizational challenges. The thirty-year-old program has been highly successful and is regarded as a model for other institutions. In order to learn from the program's path to success, this research investigated the inner dynamics and leadership actions related to the development of Biomedical Graduate Studies (BGS) at the University of Pennsylvania. The retrospective instrumental case study explored the process from the period prior to the establishment of the program in 1984 until its current configuration in 2014. Data were collected through semi-structured interviews with 18 people representing different time periods and leadership positions in the history of the program, as well as archival material. The data were analyzed to establish the chronology of events and to identify the main themes and leadership actions of the change process. The presented case was subsequently analyzed in light of established theory on organizational change and leadership orientations in higher education. This analysis demonstrated that the change was a multi-dimensional process and could be explained by several theoretical frameworks. There were elements of planning and decisive management, organizational learning, political bargaining, adaptation to environmental factors, and attention to culture and symbolism. The process involved a transformation that empowered the junior faculty, promoted collegiality, and improved the quality of recruitment, student satisfaction, and scientific outcomes. Centralization of student recruitment and funding, detaching the graduate education from the department structure, and collaborative leadership stood out as primary factors for success. This case study may serve as a guideline for other institutions that aim to develop centralized biomedical graduate programs. It also represents a reference for further research in the field of biomedical education management.
Cortes, Gomez Hernan. "Desfibrilador cardiaco microprocessado para uso clinico e em pesquisa". [s.n.], 1993. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259886.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica
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Resumo: Os desfibriladores/cardioversores devem fornecer informações das condições do paciente e da descarga desfibrilatória ao operador, para que este possa respectivamente dimensionar a descarga desfibrilatória e analisar o resultado da mesma. Desenvolveu-se um desfibrilador/cardioversor cardíaco comandado por um microcontrolador. O aparelho é portátil e alimentado por bateria. Tem como principais características a medição da impedância entre as pás e o cálculo da energia entregue. Armazena de 1 até 40J com passo de 1J
Abstract: The defibrillators/cardioverters must give information about defibrillatory discharge and patient conditions to the operator, so the operator can respectively dimensionate the discharge and analise the results. lt was developed a cardiac microcontrolled defibrillator/cardioverter. The device is portable and battery powered. Its maÍllcaracteristics are the measurement of the impedance between the paddles and the ability to calculate the delivered energy. The stored energy can be selected from 1 to 40J with a step of 1J
Mestrado
Mestre em Engenharia Elétrica
Rankin, Timothy M. "Three dimensional printing surgical instruments| Are we there yet?" Thesis, The University of Arizona, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1564614.
Pełny tekst źródłaBackground: The applications for rapid prototyping have expanded dramatically over the last 20 years. In recent years, additive manufacturing has been intensely investigated for surgical implants, tissue scaffolds, and organs. There is, however, scant literature to date that has investigated the viability of 3D printing of surgical instruments.
Materials and Methods: Using a fused deposition manufacturing (FDM) printer, an army/ navy surgical retractor was replicated from polylactic acid (PLA) filament. The retractor was sterilized using standard FDA approved glutaraldehyde protocols, tested for bacteria by PCR, and stressed until fracture in order to determine if the printed instrument could tolerate force beyond the demands of an operating room.
Results: Printing required roughly 90 minutes. The instrument tolerated 13.6 kg of tangential force before failure, both before and after exposure to the sterilant. Freshly extruded PLA from the printer was sterile and produced no PCR product. Each instrument weighed 16g and required only $0.46 of PLA.
Conclusions: Our estimates place the cost per unit of a 3D printed retractor to be roughly 1/10th the cost of a stainless steel instrument. The PLA Army/ Navy is strong enough for the demands of the operating room. Freshly extruded PLA in a clean environment, such as an OR, would produce a sterile, ready to use instrument. Due to the unprecedented accessibility of 3D printing technology world wide, and the cost efficiency of these instruments, there are far reaching implications for surgery in some underserved and less developed parts of the world.
Khare, Aditi. "Estimation and control of the pump pressure rise and flow from intrinsic parameters for a magnetically-levitated axial blood pump /". Online version of thesis, 2008. http://hdl.handle.net/1850/7988.
Pełny tekst źródłaOliveira, Eduardo Jorge Valadares. "Engenharia clínica aplicada à definição e implementação de uma proposta desenvolvimentista para o sistema nacional de inovação de produtos médicos". [s.n.], 2018. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261169.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
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Resumo: A saúde configura um complexo de atividades produtivas de bens e serviços que alavanca segmentos-chave da sociedade contemporânea. Além de sua dimensão social vinculada à própria cidadania, a saúde possui uma dimensão econômica própria, articulando entidades públicas e privadas em uma ampla rede de assistência à saúde - pelo Sistema Único de Saúde (SUS) e Sistema Nacional de Saúde Suplementar - além de um parque industrial responsável pelo fornecimento de uma vasta cadeia de produtos destinados aos cuidados da saúde humana. É uma oportunidade única para o desenvolvimento nacional no contexto das políticas de saúde e de desenvolvimento. Os conhecimentos e as ferramentas em Engenharia Clínica aqui utilizados, permitiram realizar uma análise diferenciada do contexto sócio-econômico do setor, a sistematização e a percepção dos fatores e atores que induzem ou retardam o crescimento tecnológico do setor. Acredita-se que a atuação da Engenharia Clínica permite propor uma abordagem desenvolvimentista para o setor diferente daquelas de cunho estritamente economicista, tecnológica ou sanitarista. O trabalho busca mostrar a inter-relação entre os diversos atores do Sistema Nacional de Inovação de Produtos Médicos (SNIPM) e como intervenções em pontos específicos deste sistema podem gerar inflexões promotoras do setor de produtos médicos. A motivação para a elaboração e execução deste trabalho recaiu sobre a necessidade de se definir uma estratégia para promover o desenvolvimento do SNIPM considerando as atuais políticas desenvolvimentistas e a constante expansão do mercado brasileiro de produtos médicos que, nos últimos anos, posicionou o Brasil como o segundo maior produtor mundial entre os países emergentes. Esta conjuntura promove no Ministério da Saúde o surgimento de o novo contexto institucional, onde o conceito de Complexo Industrial da Saúde surge como um dos pilares da atual política de saúde onde as ações assistenciais do SUS podem ser utilizadas como indutor da produção local de produtos estratégicos. Desta forma, pretende-se que o Programa proposto se constitua como uma das ferramentas no âmbito do SUS destinadas a fortalecer e modernizar o setor de equipamentos e materiais de uso em saúde, visando à ampliação da capacidade inovadora das empresas e mudança do seu patamar competitivo.
Abstract: The health configurates a complex set of productive activities of goods and services that leverage key segments of the modern society. Beyond its social dimension linked to citizenship, health has its own economic dimension, articulating public and private entities in a wide network of health care - through the Brazilian Unified Health System (SUS) and the Brazilian Health Insurance System - besides an industrial park that provides a wide chain of products designated to health care activities, including medical devices. It is a unique source of opportunity to promote national development in the context of both the health and development policies. The Clinical Engineering knowledge and the tools used here, allowed performing a differentiated analysis of the secto socio-economic context, the systematization and the perception of factors and actors that induce or retard the technological growth of the sector. It is believed that the role of Clinical Engineering allows the proposition of a developmental approach for the sector different than those of strictly economistic, technological or sanitarist nature. The work seeks to show the interrelationship between the various actors of the Brazilian National Medical Devices Innovation System (SNIPM) and how interventions at specific points of this system can generate inflections to promote the medical devices sector. The motivation for the development and execution of this work fell on the need to define a strategy to promote the development of SNIPM, considering the current national development policies and the constant expansion of the Brazilian market for medical devices which, in recent years, ranked Brazil as the second largest producer among the developing countries. This conjuncture promoted in the Ministry of Health the emerge of a new institutional context, where the concept of Health Industrial Complex appears as one of the pillars of the current health policy where SUS healthcare actions can be used as an inducer for local production of strategic products. Thus, it is intended that the proposed program constitutes one of the tools within the SUS to strengthen and modernize the sector of equipment and materials for health use, aiming the increase the innovative capacity of firms and change in its competitive standing.
Doutorado
Engenharia Biomedica
Doutor em Engenharia Elétrica
Greenish, Stephanie. "Acquisition and analysis of cutting forces of surgical instruments for haptic simulation". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0022/MQ50611.pdf.
Pełny tekst źródłaGuedes, Jorge Roberto. "Sistema microcomputadorizado para a análise de desfibriladores, cardioversores e esfigmomanômetros /". Florianópolis, SC, 1999. http://repositorio.ufsc.br/xmlui/handle/123456789/80925.
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Pathak, Shantanu Chaturvedi. "Characterization of plasma-polymerized polyethylene glycol-like films". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/31789.
Pełny tekst źródłaCommittee Chair: Dr. Dennis W. Hess; Committee Member: Dr. Clifford L. Henderson; Committee Member: Dr. J. Carson Meredith; Committee Member: Dr. L. Andrew Lyon; Committee Member: Dr. Mark R. Prausnitz. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Pierce, Mary E. "Engineering a fiber-optic implantable cardiovascular biosensor /". free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422954.
Pełny tekst źródłaBuck, Fabiano. "Análise dos intervalos (R-R) entre monitor WCS Pulse e eletrocardiograma portátil porta PAK/90". Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/2009.
Pełny tekst źródłaThe RR interval has been considered in the literature, the most promising analysis autonomous system. However, several monitors and validation methods is necessary through of the HRV parameters analysis. The aim of this study was, validate portable specific instrument to measurement RR interval WCS Pulse. For the proposal of this study, 30 male practitioners of BJJ were monitored through ECG and monitor Pulse WCS in different ways. The parameters of HRV: RR interval, LF, HF and LF / HF were collected in pre-exercise, 24 and 48 hours after exercise. Results: ECG instruments and WCS Pulse demonstrated strong correlation (r), and strong values to coefficient of intra-class in HRV parameters (LF, HF and LF / HF). In the other hand, the Student t values applied on the RR interval, was observed significant difference between the instruments in all moments of the research (p <0.05). Through this study, we consider that monitor RR interval WCS Pulse is effective biomarker tool (noninvasive). Thus, the equipment monitoring of RR intervals WCS Pulse, showed highs degree of agreements for use in sports training centers and Health Sciences; However, the instrument sampling resolution parameters, WCS Pulse should be more observed when compared to existing instruments in the market and electrocardiogram.
Larrieu, Jean-Charles. "Towards Instrumented Catheter for In Vivo Lung Cancer Diagnosis". Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/273074.
Pełny tekst źródłaDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Malm, Beatrice. "Verifiering av procalcitonin på instrumentet ADVIA Centaur XPT". Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-85291.
Pełny tekst źródłaBackground and purpose The PCT-value is used for observing the development of illness in patients with bacterial infection. During the Covid 19-pandemic, studies have shown that an increased PCT predicts a severe Covid-19.At the University hospital of Örebro, USÖ, the PCT assay is analyzed on the Cobas e411 instrument. The hospitals of Lindesberg and Karlskoga cannot perform the analysis due to a lack of this instrumentation.Since Centaur instruments are available at all three hospitals, performing the analysis on these instruments instead of the Cobas would enable all three hospital laboratories in the county to offer PCT analysis. Method Venous blood with different PCT values where collected from 21 patients and analysed with Siemens ADVIA Centaur XPT and Roche Cobas e411. Within-run precision was tested using pooled samples of low and high PCT concentrations. Between-run precision was tested using controls of low and high PCT concentrations. The data was examined by linear regression and Bland altman-plots using Excel. As a sensitivity analysis, the seven highest values were excluded, and the statistical analysis was repeated. Results and conclusion Despite the values correlating well in the linear regression and the assay had a high precision with a low CV% for both ADVIA Centaur XPT 1070 and 1071, the ADVIA Centaur XPT-instrument systematically measures 30% lower compared to Cobas e411. This method bias could lead to a misclassification of Covid 19-patients. With respect to our results, we consider analysis on ADVIA Centaur XPT to be risky and thus choose to continue analysing on Cobas e411.
Figueira, M?rcio Vieira. "Instrumento de aquisi??o e processamento de imagens de olhos". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2007. http://tede2.pucrs.br/tede2/handle/tede/3103.
Pełny tekst źródłaEste trabalho descreve o desenvolvimento de um instrumento inovador para apoio ao diagn?stico medico e ?s pesquisas relativas ?s doen?as que afetam o equil?brio humano. Estas doen?as s?o respons?veis por manifesta??es como tonturas, perda de equil?brio, n?useas e enj?os. Diversas t?cnicas utilizadas para avaliar as fun??es do equil?brio s?o subjetivas, invasivas ou imprecisas. A t?cnica proposta por este trabalho baseia-se em processamento digital de imagens dos olhos, possibilitando a confec??o de um instrumento objetivo, preciso e n?o invasivo. O sistema vestibular humano, localizado na orelha interna, ? fundamental para a manuten??o do equil?brio. Movimentos seletivos de cabe?a s?o usados para estimular cada um dos canais semi-circulares, que comp?em o sistema vestibular. Atrav?s do reflexo vest?bulo-motor, s?o produzidos movimentos de olhos que correspondem compensatoriamente aos est?mulos dos canais semi-circulares. Imagens dos olhos s?o capturadas por c?meras fixas a um equipamento, que isola os olhos da luz externa e os ilumina com luz infravermelha. Um computador pessoal digitaliza as imagens com aux?lio de uma placa de captura. As imagens capturadas s?o processadas por um algoritmo desenvolvido onde, em cada quadro, o centro da pupila ? calculado. Um programa desenvolvido apresenta o resultado da quantifica??o do movimento dos olhos na tela em dois gr?ficos - um para o movimento vertical e outro para o movimento horizontal. Os dados apresentados no gr?fico podem ser exportados para um arquivo para visualiza??o posterior. A correta interpreta??o dos gr?ficos pelo m?dico especialista facilita o diagn?stico de hipofun??es do sistema vestibular e sistema nervoso. Com o objetivo de se validar o algoritmo que calcula o centro da pupila, foi constru?da uma biblioteca geradora de imagens sint?ticas de olho. Diversas imagens sint?ticas foram geradas, que simularam diferentes situa??es, baseadas em situa??es reais observadas durante o trabalho. Estas imagens foram processadas e em cada uma avaliou-se o erro do algoritmo ao determinar o centro da pupila.
Spalding, Luiz Eduardo Schardong. "Sistema integrado de instrumentos e procedimentos para a realização da calibração de esfigmomanometros". reponame:Repositório Institucional da UFSC, 1996. http://repositorio.ufsc.br/xmlui/handle/123456789/76993.
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Apresenta-se uma sistematização dos conhecimentos de Engenharia Clínica, de Medicina, de Metrologia e de Instrumentação Eletrônica para a implantação de um laboratório de calibração de esfigmomanômetros. Discute-se a realidade brasileira e os projetos do Ministério da Saúde para a área de controle da qualidade dos equipamentos médicos, visando à possível utilização deste trabalho como referência para a elaboração de procedimentos e para o desenvolvimento de equipamentos para calibração dos demais aparelhos médicos. O laboratório foi concebido integrando-se um calibrador semi-automático com um conjunto de procedimentos metrológicos. Este laboratório foi implementado no H.U. de Florianópolis e no Hospital São Vicente de Paulo de Passo Fundo, RS (HSVP), onde realizou-se a calibração em 110 aparelhos.
Pepino, André Luiz Gonçalves. "Sistema de eletroestimulação portátil com oito síncronos". Universidade Tecnológica Federal do Paraná, 2011. http://repositorio.utfpr.edu.br/jspui/handle/1/209.
Pełny tekst źródłaThe use of electrical pulses for artificial reproduction movements, or Functional Electrical Stimulation (FES), is a consolidated technique for treating patients in rehabilitation. For this use, special instruments are employed to generate the signals, known as electrostimulators. This work describes the development of a portable electrostimulator with eight independent and synchronous channels, allowing a temporal activation program of their channels and making it possible to reproduce artificial movements similar to real ones. The hardware of this device has small dimensions (115 mm X 162 mm X 43 mm) and generates biphasic electrical pulses with maximum amplitudes of ± 100 mA. The pulses have durations from 100 to 800 µs and frequency from 50 to 1000 Hz. Also, there is an interface with a touchscreen liquid crystal display (LCD) for user interaction with the embedded software, which is responsible for controlling the complete system. A desktop software was developed to generate stimulatory programs, containing a virtual simulator that, using a 3D human model, allows adjustments in the stimulatory program before running it on a patient. The instrument complies with the electrical standards of the ABNT relating to electromedical equipment for neuromuscular stimulation. In vitro tests were performed following the rules described in standards to ensure compliance of functioning, and the electrical pulses provided by the device. As a result, the device showed values within the standard limits of safety, excessive temperatures, accuracy of operating data, protection of incorrect output, and human errors. Also, ten volunteers participated of in vivo tests to validate the instrument. The in vivo tests consisted on a comparison of movement ranges obtained by the volunteers in reproduction of functional movements during the use of a commercial electrostimulator and the developed one. With a maximum error of 3%, the developed instrument was capable to perform functional movements, and thus may be useful in treatment of physical rehabilitation.
Oliveira, Edinaldo Silva de. "Avaliação estatística e protocolo para uso de cateter central de inserção periférica na oncohematologia". Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2582.
Pełny tekst źródłaThe Peripherally Inserted Central Catheter (PICC) consists of an intravenous device, installed through a peripheral vein, wich advanced to the vena cava acquiring central catheter characteristics. In this sense, the present study had as general objective: to identify the feasibility conditions for the definition of standards and protocols that allow the use of PICC in adult and pediatric patients. And as specific objectives: to analyze the performance of the first and third generation of PICC in oncohematology patients comparing with the international literature; to detect sensitive points in the context of the use of the PICC for the protocol proposal; propose an instrument for the collection and relevant investigation of data and variables; and to propose protocol of use of PICC for pediatric and adult patients. This is a descriptive prospective longitudinal observational exploratory study with a quantitative approach. The research was developed in the Hematology, Oncology and Hematology Unit (UHHO) in the following sectors: Bone Marrow Transplantation Service (STMO), High Risk Chemotherapy (QTAR) and its outpatient clinics, Intensive Care Unit (ICU), cardiac, medical clinic and pediatric in a teaching hospital in the southern region of the country. The sample was non-probabilistic, for convenience consisted of two groups, (Group 1) patients who used the first generation of PICC and (Group 2) patients who used the third generation of the device. Data were collected from January 2015 to August 2016 through an instrument developed for this study, containing 22 socio-demographic variables and 35 clinical variables. 40 firstgeneration PICCs were inserted in 36 patients by "blind" techniques, totaling 830 days of catheter, average of 20.71 days, with a minimum range of two and a maximum of 141 days. Regarding the third generation of the catheter, ten PICCs were inserted in ten patients by Ultrasound-guided Modified Seldinger Technique (TSM), totaling 397 days of catheter, mean of 39.7 days with a minimum range of ten and a maximum of 86 Days. A descriptive analysis was performed by means of the absolute frequency distribution, mean and standard deviation. Afterwards, all variables were analyzed by 'Software R', we identified 11 main components that were strongly related and formed the basis of the Structural Equations Model (MEE). These variables express themselves in a relevant way for the development of future investigations. In summary, PICC can be used successfully in most patients admitted to oncohematology and other sectors in the hospital setting, as well as in children. It can be inserted by nurses, discharging the surgical environment, anesthetic process and the specialist doctor, granting them autonomy.
Iaione, Fábio. "Desenvolvimento de equipamento eletrônico para ensaio de incubadoras infantis /". Florianópolis, SC, 1999. http://repositorio.ufsc.br/xmlui/handle/123456789/81074.
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Chocos, Ruiz Miguel Edgardo. "Estudo de filtros adaptativos para a remoção de artefatos de EOG em sinais de EEG". Florianópolis, SC, 1999. http://repositorio.ufsc.br/xmlui/handle/123456789/81217.
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Paula, Jhonisson Ricardo de. "Software para desenvolvimento de transformadores para equipamentos de eletrocirurgia". Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/519.
Pełny tekst źródłaEste trabalho propõe e implementa um software que realiza o cálculo de vários modelos de transformadores de instrumentação e orienta o usuário em como efetuar medições e correções importantes nos mesmos. O software engloba transformadores de baixa e média potência, até 500 W, e com frequências de até alguns megahertz. O software cobre 3 modelos: o clássico quadripolo de baixa potência e baixa frequência; o quadripolo T com capacitor de saída para baixa potência e média frequência; e o modelo delta-estrela completo, para transformadores eletrônicos de alta frequência. O trabalho teve como objetivo criar uma ferramenta para o projeto de transformadores, especialmente transformadores de saída de instrumentação biomédica, como por exemplo, o transformador de saída do bisturi eletrônico. O software indica o modelo de acordo com os dados de entrada ou por escolha do usuário. O software foi criado para uso gratuito e foi desenvolvido em código Java, de modo que qualquer pessoa interessada possa usá-lo. Por suas características, o software pode trabalhar em todos os computadores, desktops ou celulares, e em quase todos os sistemas operacionais, basta que o usuário tenha a máquina virtual Java instalada em seu hardware. O usuário deve inserir os coeficientes necessários para realizar os cálculos, obtendo os resultados numéricos e gráficos do módulo da impedância versus frequência e de fase versus frequência na tela ou em um arquivo de dados no formato CSV (comma-separated values). O módulo de saída gráfica apresenta o módulo e a fase da impedância de entrada (Zin) em função da frequência. Isto permite ao usuário ver as ressonâncias e comportamentos característicos do transformador e tomar providências para executar um projeto conforme suas necessidades.
This work describes a software that performs calculation and gives some tips about building and measuring transformers parameters up to 500 W till a few megahertz. The software emulates 3 models: the classical T model for low power and low frequency; the T model with output capacitance; and the complete delta-star model, for high frequency electronic transformers. This work aimed to create a tool for design of transformers, especially biomedical instrumentation output transformers, like the output electrosurgical device transformer. Tips like, for example, how to wrap the secondary coil to minimize intrinsic capacitance are presented to the software user. The software indicates the model according to input data or by user choice. The software is for free use and is programmed in Java language, so that, any person interested can use it. It will be available on the internet for free download. This software can work on all computers, desktops or mobiles, and on almost all operating systems, as long as the user has the virtual machine in his hardware. The user must insert the coefficients required to perform the calculations. After this insertion he must click on the calculation button, so the results and the impedance (modulus and phase) versus frequency graphs are seen on the screen. The user can additionally export an XY CSV (comma-separated values) data file. The software graphical output modulus and phase parts shows behavior of the input impedance (Zin) versus frequency. This makes possible for the user see the resonances and characteristic behavior of the transformer.
CORREA, EDUARDO de L. "Metodologia de controle de qualidade e implantacao de campos padroes de radiacao X, nivel mamografia, seguindo a norma IEC 61267". reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9603.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
PIRES, JOAO dos S. J. "Avaliação da grandeza tensão de pico prática em equipamentos clínicos utilizados em radiodiagnóstico". reponame:Repositório Institucional do IPEN, 2007. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11716.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Silva, Bruna Maria da. "Desenvolvimento de protocolo biomédico de avaliação de tratamento de crianças com paralisia cerebral por meio do baropodômetro eletrônico computadorizado". Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1868.
Pełny tekst źródłaChronic encephalopathy nonprogressive childhood, commonly known as cerebral palsy (CP), it is a disease that affects the central nervous system and is directly related to prematurity and perinatal asphyxia. The motor dysfunction caused by this condition limit children performed daily activities and tasks, from that failure treatments see been developed and applied to improve the quality of life of individuals, such as surgical treatments, medications, physical therapy and adaptation. However, in practice, the evaluation of these patients is still performed using rating scales, being largely subjective. In this sense, was performed a descriptive study that had as objective develop and systematize a biomedical protocol baropodometric evaluation of treatment for children with CP as quantitative contribution to the repertoire of existing ratings methods. Were included in the study, children with CP, both sexes, aged from two to 12 years of age, regardless of topography and muscle tone, and that were in physical therapy with PediaSuit method and / or conventional physical therapy. Were excluded from the research individuals diagnosed with myelomeningocele, progressive disease and / or degenerative and individuals associated with other therapies treatment in addition to conventional therapy and / or PediaSuit. Comprised the sample of the study 21 children who were evaluated before and during physical therapy treatments.However, these children were evaluated in order to determine possible fragility and advantages in the development of the protocol, in total were carried out 91 tests. Some children needed the aid of a walker to stay in the standing posture. Regarding the proposed objective, this was achieved and it was considered that the Protocol Biomedical Treatment Assessment of Children with PC by means of Barapodômetro Electronic Computerized (PROBIOBEC) can be used to assess children in physical therapy. Thus, it was concluded that the systematization achieved in the format of a data acquisition protocol by means of computerized electronic baropodômetro (BEC) can be a viable quantitative further examination and useful for monitoring the impact of therapeutic interventions in this clinical class population. In addition, four articles were developed, one published in the Journal Uniandrade and another published in Congress of Biomedical Engineering - CBEB, both in 2014, and two more in the process of publication. Thus, it was concluded that the systematization achieved in the format a data acquisition protocol by means of computerized electronic baropodômetro (BEC) can be a viable quantitative complementary examination and useful for monitoring the impact of therapeutic interventions in this clinical class population. In addition, four articles were developed, one published in the Journal Uniandrade and another published in Congress of Biomedical Engineering - CBEB, both in 2014, and two more in the process of publication.
Porto, Lorena Elaine. "Avaliação de Kerma na superfície de entrada da pele em pacientes pediátricos do Hospital de Clínicas de Curitiba". Universidade Tecnológica Federal do Paraná, 2010. http://repositorio.utfpr.edu.br/jspui/handle/1/910.
Pełny tekst źródłaNo presente trabalho foram feitas medidas de dose recebida pelos pacientes pediátricos em exames de radiográficos de tórax em uma amostra de 386 exposições nas projeções AP/PA e Perfil. Os pacientes foram divididos em nas faixas etárias de 0-1 ano, 1-5 anos, 5-10 anos e 10-15 anos. Os exames foram realizados no Hospital de Clínicas da UFPR. Foi medida inicialmente a dose de entrada na pele com dosímetros termoluminescentes TLD-100 em uma amostra de 68 exposições, distribuídos pelas faixas etárias adotadas. A dose foi também determinada utilizando-se cálculos dosimétricos, que faz a determinação de dose para cada paciente a partir do rendimento do aparelho de raios X. O programa utiliza como dados de entrada a massa do paciente, a idade, a distância foco-pele, os dados da técnica radiográfica empregada (kV e mAs) e o valor de uma medida do rendimento feita com câmara de ionização para fins de calibração. Os primeiros dados avaliados mostraram doses maiores para os pacientes mais jovens. Uma mudança na técnica radiográfica dos exames contribuiu para a redução das doses. Foi avaliado todo o procedimento radiográfico e ficou caracterizada a necessidade de uma adequação da técnica radiográfica e uma constante otimização de todo o procedimento. Os dados foram colhidos novamente em 2007 e depois em 2009. Num primeiro momento os níveis de dose se mantiveram. Em 2009 os valores voltaram a subir devido ao aumento da carga (mAs). Os dados obtidos foram então comparados com os limites de dose permissíveis determinados pelos órgãos competentes.
In the present work absorbed doses by pediatric patients in chest radiographs were measured in 386 x-ray examinations in AP/PA and LAT projections. The patients were divided in age groups of 0-1 years, 1-5 years, 5-10 years and 10-15 years. The examinations were made at the pediatric room of Clinical Hospital of the Federal University of Paraná. Initially the entrance skin dose was measured with thermoluminescent dosimeters TLD-100 in 68 expositions, distributed in the age groups. The dose was also determined with the software dosimetric calculations that calculates the dose for each patient, from the X-ray equipment yield. The program uses the following data as input: patient mass, age, skin-focus, radiographic technique (kV, mAs), and the yield measurement made with an ionization chamber for calibration. The first evaluated data showed higher doses for the younger patients. A change in the radiographic technique of the examinations contributed to the reduction of the doses. The whole radiographic procedure was evaluated and, thus, showed that the radiographic technique had to be adjusted and the procedure as a whole had to be constantly optimized. Dates were measurement in 2007 again and after 2009. At a first moment the dose levels if had kept. In 2009 the values had come back to go up due to the increase of the load (mAs). The doses were then compared with the regulatory dose limits.
Corral, Sem?ia de Oliveira. "Desenvolvimento e aplica??es de um novo instrumento para estimula??o do barorreflexo". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2006. http://tede2.pucrs.br/tede2/handle/tede/3101.
Pełny tekst źródłaIntrodu??o - A manobra de Valsalva ? realizada utilizando-se uma t?cnica padr?o. O volunt?rio sopra num bocal, o qual ? preso a um man?metro, mantendo a glote parcialmente aberta, atrav?s de um pequeno orif?cio que permite a passagem do ar, medindo-se, assim, ? press?o intrator?cica. Usualmente, a press?o utilizada na manobra de Valsalva ? de 40mmHg pelo per?odo de 15s. As mudan?as hemodin?micas durante a realiza??o da manobra s?o divididas em 4 fases e incluem, especialmente, altera??es na freq??ncia card?aca e press?o arterial. Esta manobra ? comum no dia-a-dia, ocorrendo quando o indiv?duo tosse, vomita ou defeca. Pilotos de aeronaves de alta performance usam uma varia??o da manobra de Valsalva para melhorar a toler?ncia ?s r?pidas mudan?as na acelera??o. Em pesquisas laboratoriais, a manobra de Valsalva avalia a fun??o cardiovascular e o controle r?pido da press?o arterial aguda. Clinicamente, esta manobra ? utilizada como um teste de integridade funcional do sistema nervoso aut?nomo. O aparelho desenvolvido ? indicado para ser utilizado na preven??o e tratamento da taquicardia atrial parox?stica, da s?ncope neurog?nica e da hipertens?o arterial sist?mica; em pacientes acamados; no diagn?stico de altera??es venosas de membros inferiores; em miss?es espaciais, onde, pela exposi??o ? microgravidade, o astronauta perde a fun??o barorreflexa. Objetivo - O presente estudo objetivou desenvolver e discutir as poss?veis aplica??es de um m?todo para estimula??o barorreceptora, atrav?s de um novo aparelho que permite a realiza??o da manobra de Valsalva de forma automatizada e n?o-assistida. M?todo - Um man?metro digital foi projetado e desenvolvido pelo Laborat?rio de Microgravidade/PUCRS para monitorar a press?o intrator?cica exercida durante a expira??o for?ada ou manobra de Valsalva. Este equipamento, denominado de Equipamento para Manobra de Valsalva (EMV), ? constitu?do de cinco partes principais, sendo elas: um transdutor de press?o (sensor de press?o e amplificador de sinais), um display de caracteres, um display em barra de LED e um microcontrolador. Conclus?o - O aparelho desenvolvido ? de f?cil manuseio e visualiza??o, port?til e de baixo custo. Testes preliminares indicaram que o EMV permite que um indiv?duo realize a manobra de Valsalva de forma de forma correta e sem qualquer assist?ncia durante o procedimento.
Diestelmeier, Bryce. "Design and application of an instrumented pendulum device for measuring energy absorption during fracture insult in large animal joints in vivo". Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/3285.
Pełny tekst źródłaDums, José Flávio. "Desenvolvimento de um sistema para medir potência ativa em equipamentos eletrocirúrgicos em tempo real". Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2782.
Pełny tekst źródłaEste trabalho apresenta a concepção de estruturas eletrônicas que podem ser utilizadas para a leitura de tensão e de corrente em conversores estáticos de energia, chaveados ou não, que trabalham em frequências superiores a 100 kHz, em especial as frequências eletrocirúrgicas (300 kHz..5 MHz). Além das estruturas de leitura, também a potência instantânea e a potência ativa são determinadas de forma analógica, possibilitando o futuro desenvolvimento de um sistema de controle da potência ativa de saída de um equipamento eletrocirúrgico. O objetivo é apresentar uma estrutura cuja reatância seja desprezível na faixa de frequências considerada, ou cujo efeito possa ser compensado, possibilitando a criação de circuitos amostradores de sinais complexos, de alta frequência, com um baixo custo de implementação, e usar estas amostras para determinar a potência ativa entregue. Um breve estudo das características reais dos resistores axiais de sinal (resistores com corpo cilíndrico, revestido por um filme de carbono ou filme metálico e com fixação por terminais através de furos na placa de circuito impresso, do inglês Pin Through Hole - PTH), de superfície (Surface Mounted Device - SMD) e resistores de potência de fio também é apresentado. Em seguida, dois modelos simplificados, porém realísticos, são apresentados, sendo um para resistências inferiores a 100 Ohms (Ω) e outro para resistências superiores a 100 Ω. Na sequência, um sistema analógico que realiza a amostragem dos sinais de tensão e de corrente de saída é proposto, bem como um sistema que determina a potência ativa em tempo real. Cada sistema é desenvolvido e testado individualmente, sendo que os resultados validados de um estágio são utilizados para aferir a eficácia do estágio subsequente. Ao final, o conjunto é testado, por meio de uma sequência de ensaios, cujos resultados são analisados e as considerações acerca do sistema como um todo são apresentadas, enfatizando que o erro máximo no cálculo da potência ativa ficou abaixo de 20%, como exige a norma NBR IEC 60601-2-2, assim como o baixo custo de implementação foi alcançado. Por fim, estes resultados mostram uma maneira viável de implementar um sistema de medição de potência ativa para saídas de equipamentos eletrocirúrgicos.
This work presents the design of electronic structures that can be used for voltage and current probing in static power converters, switched or not, which work at frequencies above 100 kHz, in particular electrosurgical frequencies (300 kHz..5 MHz). In addition, also the instantaneous power and the active power are determined analogically, allowing the development of a control system that stabilizes active output power of an electrosurgical unit. The purpose of this work is to find a structure with neglectable reactance in the frequency band considered, or compensate them, creating low cost sampler circuits for complex high frequency signals. A brief study of Pin Through Holes (PTH) signal resistors, Surface Mounted Devices (SMD) signal resistor, and power wire resistors above 100 Ω characteristics is presented. Two realistic simplified models are proposed. One for signal resistances lower than 100 Ω and power wire resistors lower than 100 Ω. Another one for signal resistance greater than 100 Ω. Further, an analog system for reading the output voltage and current are proposed as well as one for real time active power determination. Each system is individually designed and tested. Validated results of one stage are used to assess the effectiveness of the subsequent stage. In the end, the full circuit is tested, and the results are analyzed demonstrating that a lower than 20% error is achieved as well as the low implementation cost. Finally, these results show a way to implement an active power measurement system for electrosurgical units that is unprecedented up to now.