Relevant bibliographies by topics / Respirator

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Respirator'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 May 2022

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Journal articles on the topic "Respirator"

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Bischoff, Werner E., JoLyn Turner, Gregory Russell, Maria Blevins, Engy Missaiel, and John Stehle. "How well do N95 respirators protect healthcare providers against aerosolized influenza virus?" Infection Control & Hospital Epidemiology 40, no. 2 (December 18, 2018): 232–34. http://dx.doi.org/10.1017/ice.2018.326.

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AbstractN95 respirator masks are recommended for protection against respiratory viruses. Despite passing fit-testing 10% of N95 respirator users encountered breakthroughs with exposure to influenza virus compared to full protection provided by a powered air purifying respirator. The current recommendation of N95 respirators should be evaluated for endemic and emerging scenarios.
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Lam, Simon Ching, Joseph Kok Long Lee, Linda Yin King Lee, Ka Fai Wong, and Cathy Nga Yan Lee. "Respiratory Protection by Respirators: The Predictive Value of User Seal Check for the Fit Determination in Healthcare Settings." Infection Control & Hospital Epidemiology 32, no. 4 (April 2011): 402–3. http://dx.doi.org/10.1086/659151.

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The N95 respirator is one type that is recommended by the World Health Organization and the Centers for Disease Control and Prevention (CDC) to prevent inhalation of droplets that may act to transmit respiratory pathogens. However, the reliability of this respirator to prevent transmission is dependent on how well it is fitted to the wearer. For ill-fitting respirators, the average penetration by ambient aerosol was found to be 33%, compared with 4% for well-fitting respirators. Such penetration or leakage may be caused by the gap between the respirator and the wearer's face. Therefore, formal fit testing should be carried out prior to the use of N95 respirators. Quantitative fit testing measures “the adequacy of respirator fit by numerically measuring the amount of leakage into the respirator” using an electronic device.
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Hines, Stella E., Clayton H. Brown, Marc Oliver, Patricia Gucer, Melissa Frisch, Regina Hogan, Tracy Roth, James Chang, and Melissa McDiarmid. "Cleaning and Disinfection Perceptions and Use Practices Among Elastomeric Respirator Users in Health care." Workplace Health & Safety 68, no. 12 (August 19, 2020): 572–82. http://dx.doi.org/10.1177/2165079920938618.

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Background: Reusable elastomeric respirator use in health care may represent one solution to address N95 respirator shortages experienced during infectious disease outbreaks, but cleaning and disinfection requirements may limit their utility. Evidence of respirator cleaning and disinfection behaviors and practices by health care workers may inform guidance on reusable respirator use. Methods: Medical system elastomeric respirator users were surveyed about respirator cleaning and disinfection practices and perceptions via an electronic survey. Respondents were subsequently classified based on reported compliance with their assigned respirator use. To explore whether respirator cleaning and disinfection issues affected compliance with assigned device use, responses were compared between user groups and adjusted for covariates. Results: A total of 432 of 2,024 (21%) eligible elastomeric respirator users completed the survey. Most (>90%) reported that their respirator was clean, but only 52% reported that they always disinfect their respirators after use according to the hospital’s expected practice. Only 40 respondents (9%) reported regularly cleaning the respirator with soap and water, in accordance with manufacturer recommendations. Reporting of suboptimal decontamination practice was not associated with assigned device compliance, however, except among providers and respiratory therapists. Conclusion/Application to Practice: Although perceptions of cleanliness and adherence to expected decontamination practices during routine use did not appear to influence compliance with assigned respirator use overall, this did predict compliance among providers and respiratory therapists, both of whom have nonfixed workstations. Practical and effective strategies to assure easy access to and availability of clean reusable respiratory protective devices are needed to facilitate their use in health care respiratory protection programs.
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Hines, Stella E., Joanna Gaitens, Nora M. Mueller, Diego Molina Ochoa, Eseosa Fernandes, and Melissa A. McDiarmid. "Respiratory Protection Perceptions among Malian Health Workers: Insights from the Health Belief Model." International Journal of Environmental Research and Public Health 19, no. 5 (March 4, 2022): 3028. http://dx.doi.org/10.3390/ijerph19053028.

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Reusable respiratory protective devices called elastomeric respirators have demonstrated their effectiveness and acceptability in well-resourced healthcare settings. Using standard qualitative research methods, we explored the feasibility of elastomeric respirator use in low- and middle-income countries (LMIC). We conducted interviews and focus groups with a convenience sample of health workers at one clinical center in Mali. Participants were users of elastomeric and/or traditional N95 respirators, their supervisors, and program leaders. Interview transcripts of participants were analyzed using a priori constructs from the Health Belief Model (HBM) and a previous study about healthcare respirator use. In addition to HBM constructs, the team identified two additional constructs impacting uptake of respirator use (system-level factors and cultural factors). Together, these framed the perceptions of Malian health workers and highlighted both facilitators of and barriers to respirator use uptake. As needs for respiratory protection from airborne infectious hazards become more commonly recognized, elastomeric respirators may be a sustainable and economic solution for health worker protection in LMIC.
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Faisal, Haruyuki Dewi, and Agus Dwi Susanto. "Peran Masker/Respirator dalam Pencegahan Dampak Kesehatan Paru Akibat Polusi Udara." Jurnal Respirasi 3, no. 1 (April 22, 2019): 18. http://dx.doi.org/10.20473/jr.v3-i.1.2017.18-25.

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Outdoor air pollution contributed harmful impact to public health. There are several respiratory disorders related to outdoor air pollution such as acute respiratory infection, lung cancer, asthma, chronic obstructive lung disease (COPD) and lung function disorder. Respirator is a personnel protective device which has role in the primary intervention step. Currently exist many types of respirators in industrial setting that have specific function to certain hazard exposure in work process. It is difficult to choose one type of respirator that can be implemented in population setting to protect against all air pollutant content. Therefore, it is relevant choosing one respirator type which has the ability to effectively filtrate one of air pollutant content that is the particulate matter. One respirator type, N95 mask has superiority in term of cost and technical use aspects for protecting particulate matter pollutant. Respirator usage effectivity in population setting is an important subject to find out more.
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McKay, Roy T. "Respirator and Respiratory Protection." Journal of Occupational & Environmental Medicine 39, no. 8 (August 1997): 791. http://dx.doi.org/10.1097/00043764-199708000-00023.

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Howard, Brittany E. "High-Risk Aerosol-Generating Procedures in COVID-19: Respiratory Protective Equipment Considerations." Otolaryngology–Head and Neck Surgery 163, no. 1 (May 12, 2020): 98–103. http://dx.doi.org/10.1177/0194599820927335.

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The correct selection and utilization of respiratory personal protective equipment is of the utmost importance in the current COVID-19 pandemic. This is especially true for health care workers exposed to high-risk aerosol-generating procedures, including otolaryngologists, ophthalmologists, neurosurgeons, maxillofacial surgeons, and laparoscopic surgeons. This communication provides a review of approved forms of respiratory protection and compares their characteristics, including surgical masks, N95 respirator, elastomeric respirators, powered air-purifying respirators, and controlled air-purifying respirators. For standard airborne precautions, N95 respirator are appropriate for respiratory protection. However, high-risk aerosol-generating procedures may create aerosolization of high viral loads that represent increased risk to health care workers. In these situations, enhanced respiratory protection with filters certified as 99, 100, or HEPA (high-efficiency particulate air) may be appropriate.
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Lee, Sanghyun, Hongjung Kim, Taeho Lim, Jaehoon Oh, Hyunggoo Kang, Chiwon Ahn, Yeongtak Song, Juncheol Lee, and Hyungoo Shin. "Simulated workplace protection factors for respirators with N95 or higher filters for health care providers in an emergency medical centre: A randomized crossover study." Hong Kong Journal of Emergency Medicine 24, no. 6 (November 2017): 282–89. http://dx.doi.org/10.1177/1024907917735088.

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Introduction: Health care providers in emergency medical centres often encounter infected sources during medical procedures; these sources can generate droplets. Wearing respirators could help to protect against infection risk. However, to the best of our knowledge, no previous study has reported the efficacy of N95 or higher respirators for health care providers in emergency medical centres. Methods: A randomized, crossover study of 26 health care providers was conducted to examine the protective performance of respirators. Quantitative fit tests with three types of respirators (cup type, fold type without valve and fold type with valve) were performed using seven exercises. Primary outcomes were the fit factors. Secondary outcomes included the percentage of fit factors above 100 and respirator preference. Results: After excluding one participant, data for 25 participants were analysed. The fit factors and the percentage of fit factors above 100 were higher when participants wore a fold-type respirator (200 fit factors [38.6–200], 100% [0–100]) relative to those for the cup-type respirator (114.0 fit factors [16.0–185.2], 60% [0–100]) and valve-type respirator (84.9 fit factors [14.2–170.8], 23.8 % [0–100]) in normal respiration. There was no clear preference regarding the type of respirator. Conclusion: The type of respirator could influence protective performance for health care providers. Health care providers in emergency medical centres should be aware of and wear the type of respirator that is well-fitted for them in advance.
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Burton, Christopher, Briana Coles, Anil Adisesh, Simon Smith, Elaine Toomey, Xin Hui S. Chan, Lawrence Ross, and Trisha Greenhalgh. "Performance and impact of disposable and reusable respirators for healthcare workers during pandemic respiratory disease: a rapid evidence review." Occupational and Environmental Medicine 78, no. 9 (January 27, 2021): 679–90. http://dx.doi.org/10.1136/oemed-2020-107058.

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ObjectivesTo synthesise evidence concerning the range of filtering respirators suitable for patient care and guide the selection and use of different respirator types.DesignComparative analysis of international standards for respirators and rapid review of their performance and impact in healthcare.Data sourcesWebsites of international standards organisations, Medline and Embase, hand-searching of references and citations.Study selectionStudies of healthcare workers (including students) using disposable or reusable respirators with a range of designs. We examined respirator performance, clinician adherence and performance, comfort and impact, and perceptions of use.ResultsWe included standards from eight authorities across Europe, North and South America, Asia and Australasia and 39 research studies. There were four main findings. First, international standards for respirators apply across workplace settings and are broadly comparable across jurisdictions. Second, effective and safe respirator use depends on proper fitting and fit testing. Third, all respirator types carry a burden to the user of discomfort and interference with communication which may limit their safe use over long periods; studies suggest that they have little impact on specific clinical skills in the short term but there is limited evidence on the impact of prolonged wearing. Finally, some clinical activities, particularly chest compressions, reduce the performance of filtering facepiece respirators.ConclusionA wide range of respirator types and models is available for use in patient care during respiratory pandemics. Careful consideration of performance and impact of respirators is needed to maximise protection of healthcare workers and minimise disruption to care.
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Bazaluk, Oleg, Alim Ennan, Serhii Cheberiachko, Oleh Deryugin, Yurii Cheberiachko, Pavlo Saik, Vasyl Lozynskyi, and Ivan Knysh. "Research on Regularities of Cyclic Air Motion through a Respirator Filter." Applied Sciences 11, no. 7 (April 1, 2021): 3157. http://dx.doi.org/10.3390/app11073157.

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In this paper, a solution to the problem of the change in the pressure drop in a respirator filter during cyclic air motion is suggested since the current theory of filtering is based on steady-flow processes. The theoretical dependence of the pressure drop in the respirator filter on air flow rate is determined, which is represented by the harmonic law, which characterizes the human respiration process during physical work. For the calculation, a filter model was used, which is represented by a system of parallel isolated cylinders with a length equal to the total length of the filter fibres surrounded by porous shells formed by a viscous air flow field, with a size determined by the equal velocities of the radial component of air flow and undisturbed flows. The flow-around process in the proposed model of air flow through the respirator filter is described by the Brinkman equation, which served to establish the total air flow resistance in the proposed system under conditions of velocity proportionality. It consists of two parts: the first characterizes the frictional resistance of the air flow against the surface of the cylinder, which imitates the filter fibre; the second—the inertial part—characterizes the frequency of pulsations of respiratory movements during physical performance. The divergence of the analytical results and experimental studies is no more than 20%, which allows the use of the established dependence to estimate the change in pressure drop in a respirator filter made of filter material “Elephlen” when the user carries out different physical activities. This allows the period of effective protective action of respirators with different cycles of respiration during physical activities to be specified, which is a very serious problem that is not currently regulated in health and safety regulations, and it also allows the prediction of the protective action of filters and respiratory protection in general.
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Dissertations / Theses on the topic "Respirator"

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Wu, Bingbing. "Ensuring Respiratory Protection through Respirator Fit Testing and Real-Time Monitoring." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535374058309808.

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Jonasson, Simon. "Phoenix. : PPE wildfire respirator." Thesis, Umeå universitet, Designhögskolan vid Umeå universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-162081.

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Forest fires has become an increasing threat all over the world. Pollution and rising greenhouse gases has led to an ever increase in global temperatures. Sweden has previously been spared from larger fires, but in the past few year it has been been made clear that these climate changes will affect the number and intensity of forest fires.  In this project I have investigated how forest fires work and how the process of  extinguishing them looks today. With a focus on the personal equipment I have looked into how to improve the working environment and the safety for fire-fighters. Using the design process this problem is tackled from a holistic point of view, looking at both the users and context. The solutions presented in this project is a professional safety product called “Phoenix. PPe Wildfire respirator”. A lightweight portable oxygen harness with an attached emergency mask.
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Li, Hancao. "Modeling and control of a pressure-limited respirator and lung mechanics." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47667.

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The lungs are particularly vulnerable to acute, critical illness. Respiratory failure can result not only from primary lung pathology, such as pneumonia, but also as a secondary consequence of heart failure or inflammatory illness, such as sepsis or trauma. When this occurs, it is essential to support patients with mechanical ventilation while the fundamental disease process is addressed. The goal of mechanical ventilation is to ensure adequate ventilation, which involves a magnitude of gas exchange that leads to the desired blood level of carbon dioxide, and adequate oxygenation that ensures organ function. Achieving these goals is complicated by the fact that mechanical ventilation can actually cause acute lung injury, either by inflating the lungs to excessive volumes or by using excessive pressures to inflate the lungs. Thus, the challenge to mechanical ventilation is to produce the desired blood levels of carbon dioxide and oxygen without causing further acute lung injury. In this research, we develop an analysis and control synthesis framework for a pressure-limited respirator and lung mechanics system using compartment models. Specifically, a general mathematical model is developed for the dynamic behavior of a multicompartment respiratory system. Then, based on this multicompartment model, an optimal respiratory pattern is characterized using classical calculus of variations minimization techniques for inspiratory and expiratory breathing cycles. Furthermore, model predictive controller frameworks are designed to track the given optimal respiratory air flow pattern while satisfying control input amplitude and rate constrains.
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Gardner, Jan Maria, University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "Assessment of effective implementation of respirator programs in industry in NSW." THESIS_CSTE_EAG_Gardner_J.xml, 2002. http://handle.uws.edu.au:8081/1959.7/781.

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In spite of the substantial repository of literature about respirators, little is known about the practicalities of their use. The focus of this research was about the practical aspects of using respirators in New South Wales workplaces. Two self-administered postal surveys were used to assess the level of implementation of respirator programs in 1996 and 2001. After five years, six elements improved. The most improvement was seen in the area of documentation including written procedures, keeping training records, recording respirator tasks, and maintenance records. The second survey investigated respirator maintenance and found little automated cleaning. Thorough washing was scarce with more than 50% of organisations relying on moist towelettes. For the third portion of the research methodology 485 used, half facepiece reusable respirators from 36 different sites were examined to determine the most common respirator defects. Maintenance and cleaning procedures were primitive and probably inadequate. Disinfection or sanitisation was common practice indicating concern about infectious diseases. The 2001 survey found that physical inspection of respirators in the workplace usually checked for the common types of defects found in the examination of used respirators. Weight, breathing resistance, heat and tightness were reported as causes of discomfort. The key outcomes from the research were that respirator programs were poorly implemented in a group of organisations that were expected to have more expertise than most and that the most common defects could be corrected by good respirator cleaning programs.
Doctor of Philosphy (PhD)
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Larsson, Jessica, and Gun Syversen. "Intensivvårdssjuksköterskors erfarenheter av patientens urträning ur respirator." Thesis, Karlstad University, Faculty of Social and Life Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-4285.

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Intensivvårdsjuksköterskan möter i sitt dagliga arbete många patienter som behandlas i respirator. Långvarig respiratorbehandling innebär ofta ökade risker för komplikationer. Med anledningen av detta är det viktigt att minska tiden i respirator med effektiv urträning. Att tränas ur respiratorn är en individuell process och bör därför anpassas efter patientens förmåga. Syftet med examensarbetet var att beskriva intensivvårdssjuksköterskors erfarenheter av tracheostomerade patienters urträning ur respirator. Metoden var kvalitativ och datainsamlingen genomfördes med intervjuer av fem intensivvårdsjuksköterskor på ett sjukhus i Mellansverige. Intervjuerna analyserades med latent kvalitativ innehållsanalys. Resultatet visar att urträningsprocessen är ett komplext fenomen och beskriver intensivvårdssjuksköterskors erfarenheter av olika möjligheter och hinder som kan påverka patienten i urträningsprocessen. Dessa beskrivs närmare under tre kategorier: IVA sjuksköterskans kompetens, att vara medveten om patientens olika förutsättningar och ett fungerande samarbete har betydelse för urträningen. Intensivvårdssjuksköterskan ansågs ha en betydelsefull roll i patientens urträning och för det krävdes kunskaper och erfarenheter. Dokumentation och utvärdering har betydelse för en framgångsrik urträning. Varje patient har olika förutsättningar och det är individuellt hur mycket patienten klarar av. Urträningen påverkas av patientens välbefinnande, andning och cirkulation. Kommunikation och medverkan av både personal och patient ansågs även viktigt i urträningsprocessen.

 


The critical care nurse faces in her daily work, many patients who are mechanically ventilated. Prolonged ventilated treatment often means increased risk of complications therefore it is important to reduce the time on the ventilator with effective weaning. Weaning from ventilator is an individual process and should be adapted to the patient’s ability. The aim was to describe the critical care nurses’ experiences of tracheotomy patient’s weaning from ventilator. The research method was qualitative and the data collection was conducted with interviews of five critical care nurses in a hospital in central Sweden. The interviews were analyzed with latent qualitative content analysis. The result shows that the weaningprocess is a complex phenomenon and describes the critical care nurses´ experiences of different opportunities and barriers that may affect the patient in the weaning process. These experiences are described in detail in three categories; the critical care nurse’s competence, to be aware of the patient’s different conditions and good cooperation has been important for weaning. The critical care nurse was considered to have a significant role in the weaning process and for that she requires knowledge and experience. Documentation and evaluation are important for a successful weaning. Each patient has different circumstances and it is an individual process how much the patient can cope. The weaning process is affected by the patient’s wellbeing, breathing and circulation. Communication and involvement of both staff and patient was also considered important in the weaningprocess.


Specialistsjuksköterska med inriktning mot intensivvård
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Balkhyour, Mansour. "Factors that affect respirator fit-testing programs." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/289239.

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Respirators are used to minimize the exposure to air contaminants. A good fit is essential for the effective functioning of a respirator. The Occupational Safety and Health Administration (OSHA) requires an annual respirator fit testing. Respirator fit can be assessed either qualitatively or quantitatively. Two studies were conducted to assess the fit testing program with specific objectives to: (1) assess leak rates in full and half mask respirators; (2) assess the effectiveness of "feedback"1 on the quality of fit; (3) evaluate the effect of daily beard growth on respirator leak rates. In the first study, it was found that the half mask respirator has a significantly lower leak rate than the full face respirator. A significant reduction in leak rate in both respirator types with "feedback" was also observed. The finding that half mask respirators have lower leak rates directly contradicts American National Standard Institute's (ANSI) guidelines of higher Assigned Protection Factor (APF) for full mask respirator. Further studies are necessary to determine these findings and to amend respirator recommendations in the future. As expected in the second study, beard growth was associated with respirator leak rate. The effect of daily growth on leak rate over a period of twelve days could be defined by a second order regression equation. An attempt was made to describe some characteristics of beard that affect the leak rate. After 12 days of beard growth, it was found that the aspect ratio (length/diameter) of hair was inversely correlated with leak rate (r = 0.64). 1Feedback: A numerical value measuring the minimum leak rate that can be gotten from a respirator fitting with a normal donning.
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Murphy, Richard Wright 1958. "Quantitative respirator fit testing by negative pressure." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276947.

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An automated system for quantitative respirator fit testing by negative pressure was evaluated by comparison testing with a computerized aerosol fit test system (Dynatech Frontier Model 260A). The new negative pressure system measures leakage flow while inspiratory pressures are sustained in a respirator facepiece rather than by pressure decay. Four phases of comparison testing were graduated by level of control, ranging from non-subject tests with hypodermic needle leakages to fit tests of 125 Air Force personnel. Throughout the series of tests, negative pressure fit factors were consistently more conservative than aerosol fit factors and showed less variability. Leakage flow rates measured by the negative pressure instrument were highly correlated with leak needle cross-sectional area as predicted by principles of air-flow physics. Comparison of subject and non-subject generated aerosol fit factors indicated significant aerosol losses, possibly due to streamlining and respiratory tract deposition. Negative pressure fit factors were not affected by these subject-related losses.
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Dahlberg, Emma, and Fanny Glantz. "Att behandlas med respirator på en intensivvårdsavdelning." Thesis, Mittuniversitetet, Avdelningen för omvårdnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-28120.

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Euteneuer, Sara. "Entwöhnung vom Respirator nach Langzeitbeatmung outcome langzeitbeatmeter Patienten /." [S.l.] : [s.n.], 2004. http://archiv.ub.uni-marburg.de/diss/z2004/0621/.

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Newnum, Justin Dale. "The effects of relative humidity on respirator performance." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/861.

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Books on the topic "Respirator"

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NIOSH respirator decision logic. [Atlanta, Ga.?]: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, Division of Standards Development and Technology Transfer, 1987.

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Rajhans, Gyan S. Practical guide to respirator usage in industry. 2nd ed. Amsterdam: Butterworth-Heinemann, 2002.

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Rajhans, Gyan S. Practical guide to respirator usage in industry. Boston: Butterworth, 1985.

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M, Schusler Kathleen, ed. Guide to the medical evaluation for respirator use. Beverly Farms, MA: OEM Press, 2000.

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Hasan, Rashed A. A pocket guide to mechanical ventilation & other measures of respiratory support. 3rd ed. [Charleston, SC]: Booksurge, 2005.

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Calais-Germain, Blandine. Respiration: Anatomie, geste respiratoire. Paris: Éditions DésIris, 2005.

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Sinclair, Alex. User guidelines for respiratory assist devices. Ottawa: CHA Press, 1993.

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1945-, Pilbeam Susan P., ed. Mechanical ventilation: Physiological and clinical applications. 5th ed. St. Louis, Mo: Elsevier, 2012.

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MacIntyre, Neil R., and Richard D. Branson, eds. Mechanical ventilation. Philadelphia, Pennsylvana: W.B. Saunders, 2001.

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MacIntyre, Neil R., and Richard D. Branson. Mechanical Ventilation. Philadelphia: Saunders, 2000.

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Book chapters on the topic "Respirator"

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Popendorf, William. "Respirator Controls." In Industrial Hygiene Control of Airborne Chemical Hazards, 603–54. Second edition. | Boca Raton : Taylor & Francis, CRC Press, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9781351238052-22.

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Colton, Craig E. "Respirator Classification." In Handbook of Respiratory Protection, 27–54. Boca Raton : Taylor & Francis, CRC Press, 2018.: CRC Press, 2017. http://dx.doi.org/10.1201/9781351109079-3.

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Larsen, Reinhard, and Thomas Ziegenfuß. "Einstellgrößen am Respirator." In Beatmung, 313–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-11228-1_10.

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Kuhlen, R., R. Rossaint, S. Hausmann, D. Pappert, and K. Falke. "Entwöhnung vom Respirator." In Aktuelles Wissen für Anästhesisten, 89–105. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78786-7_8.

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Kehl, Franz, and Hubert Böhrer. "Entwöhnung vom Respirator." In Intensivmedizin Fragen und Antworten, 25–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07957-7_7.

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Larsen, Reinhard, and Thomas Ziegenfuß. "Einstellgrößen am Respirator." In Beatmung, 185–206. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-06009-4_10.

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Larsen, Reinhard, and Thomas Ziegenfuß. "Einstellgrößen am Respirator." In Beatmung, 313–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-06010-0_10.

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Barckow, D. "Entwöhnung vom Respirator." In Beatmung, 111–17. Vienna: Springer Vienna, 1993. http://dx.doi.org/10.1007/978-3-7091-7543-9_14.

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Yamamoto, Dirk P. "Respirator Fit Testing." In Handbook of Respiratory Protection, 211–32. Boca Raton : Taylor & Francis, CRC Press, 2018.: CRC Press, 2017. http://dx.doi.org/10.1201/9781351109079-11.

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Butler, Kathryn M. "Using 3D Head and Respirator Shapes to Analyze Respirator Fit." In Digital Human Modeling, 483–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02809-0_51.

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Conference papers on the topic "Respirator"

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Kosumi, Remi, Ryota Sakamoto, Norihiko Kato, Ken’ichi Yano, Shotaro Iwamoto, Tomohiro Tsujioka, Yuya Takahashi, and Noriko Yamakawa. "Non-Contact Measurement of Respiratory Function for Judging the Effect of Respiratory Rehabilitation in Patients With SMID." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23289.

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Abstract Patients with SMID (severe motor and intellectual disabilities) have severe limb disorders and severe mental disabilities. More than half of their deaths are due to respiratory disorders. Therefore, respiratory rehabilitation is important. The effect of respiratory rehabilitation is generally determined by measuring respiratory volume and rate with an expired gas analyzer. However, the equipment is expensive and requires direct contact, making it difficult to use. The purpose of this research is to develop a non-contact measurement system for respiratory function to assess the effect of respiratory rehabilitation in patients with SMID. The proposed method detects respiration by depth change of the abdomen measured using a three-dimensional camera designed to identify body tremor /motion and respiration based on respiratory parameters and individually adapted parameters. Finally, we verify the rehabilitation effect of an RTX respirator on patients with SMID and the effectiveness of the proposed method in an experiment.
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Donahue, Carly L., Mu’ath Adlouni, Darshil Choksi, Brendan D’Souza, Zachary I. Richards, and R. Kenneth Sims IV. "Image-Based Web Application for Respirator Sizing: Contactless Mask-Fitting During a Pandemic." In 2022 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/dmd2022-1033.

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Abstract At the beginning of the COVID-19 pandemic, many hospitals and healthcare institutions lacked an adequate supply of masks and other personal protective equipment. Moreover, protocols that were in place to ensure healthcare workers had appropriately sized masks consumed precious time and resources. Any determination of a user’s correct respirator size demanded an in-person assessment and had the potential to waste multiple respirators. Here we introduce IBARS (Image-based Application for Respirator Sizing), a novel tool which provides respirator size recommendations based on a facial image and basic user demographics. This solution obviates the need for an in-person assessment, providing an accurate size recommendation within seconds. The application has the potential to reduce time-per-worker respirator fitting, reduce overall respirator usage, and increase safety by providing hospitals with a non-contact option for sizing. Furthermore, future applications may assist healthcare institutions optimize supply chains by providing rapid assessments and re-assessments of appropriate respirator sizes used by their workers. Early testing indicated accuracy of 71.3% for the software (N=16), and further testing is underway at Houston Methodist Hospital.
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D’Souza, Gavin A., Suvajyoti Guha, Matthew R. Myers, and Prasanna Hariharan. "Evaluation of Aerosol Leakage Sites Through Respirators Using Image-Based Modeling." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3446.

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Personal protective equipment (PPE) such as respirators will form the first line of defense in the event of a public health emergency including an airborne pandemic or a bio-terror attack. The two major pathways by which virus-carrying aerosols can reach the human lungs through these PPEs are: a) the intrinsic penetration through porous layers of the PPE and b) the leakage through gaps between the PPE and a person’s face [1, 2]. The contribution from the second pathway can be significantly reduced using fit-testing i.e. by choosing the appropriately sized respirator for a specific face. Unfortunately, in case of an emergency, it would not be possible to fit-test the entire US population. In this scenario, excessive leakage can occur through the gaps. [1]. Hence, it is critical to identify the potential anatomical leak sites (gaps) and quantify the amount of aerosol leakage through surgical respirators for the average US population. At the behest of Office of Counterterrorism and Emerging Threats, the Center for Devices and Radiological Health, US Food and Drug Administration (FDA), has been developing a comprehensive risk assessment model for determining the risk to different populations in case of an “off-label” use of such PPEs, i.e. for public emergency scenarios for which these FDA cleared respirators were not intended to be used. In order to develop the risk assessment model, establishing a correlation between the respirator gaps and aerosol leakage between the face and the respirator is critical. A previous study [3] identified the gaps of N95 surgical respirators for a large population and quantified the aerosol leak using computational fluid dynamics. However, the gap surface area, which is a key parameter required for establishing the gap-aerosol leak correlation, has not been quantified before. In this study, gaps were identified and the gap surface areas were quantified for multiple head-respirator combinations under realistic conditions using imaging coupled with computer-aided design and modeling.
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Harber, Philip, Samantha Wu, David Yun, Siddharth Bansal, Yuan Li, and Silverio Santiago. "Anxiety During Respirator Use: Comparison Of Two Respirator Types." In American Thoracic Society 2011 International Conference, May 13-18, 2011 • Denver Colorado. American Thoracic Society, 2011. http://dx.doi.org/10.1164/ajrccm-conference.2011.183.1_meetingabstracts.a4774.

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Lei, Zhipeng, and James Yang. "Computer-Aided Customized Shape Design of an N95 Filtering Facepiece Respirator." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13251.

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A respirator protects its user by sealing the user’s face and filtering hazardous particles from environment. However, faceseal leakages of users-respirators always happen. First, this study investigated a computer-aided technique for designing a well fitted N95 filtering facepiece respirator (FFR) for a subject. The customized N95 FFR includes a customized contact area, a center filtering area, two straps and a nasal clip. Five base contact areas of National Institution for Occupational Safety and Health (NIOSH) headforms were created and the customized contact area was modeled using the mapping relationship between the subject and a NIOSH headform. The center filtering area was designed by considering constraints of N95 FFR shape. Second, this study used simulation-based approaches, including the FE method and computational fluid dynamics (CFD) method, to assess the performance of the customized N95 FFR on the subject. The contact pressure and the faceseal leakage from the subject-customized N95 FFR combination were compared with the results from the subject-existing N95 FFRs combinations. The comparison showed that the customized N95 FFR provided the subject an optimized contact pressure distribution and no faceseal leakage.
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Bansal, S., S. Santiago, D. Yun, S. Wu, E. Liu, F. Nguyen, and P. Harber. "Interaction of Respirator (PPE) Type and Respiratory Conditions on Breathing Patterns." In American Thoracic Society 2009 International Conference, May 15-20, 2009 • San Diego, California. American Thoracic Society, 2009. http://dx.doi.org/10.1164/ajrccm-conference.2009.179.1_meetingabstracts.a1637.

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Zhuang, Z., R. Berry Ann, and D. Viscusi. "224. The Effect of Subject Characteristics and Respirator Features on Respirator Fit." In AIHce 2003. AIHA, 2003. http://dx.doi.org/10.3320/1.2757902.

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Lei, Zhipeng, and James Yang. "Computing Carbon Dioxide and Humidity in Filtering Facepiece Respirator Cavity During Breathing Cycles." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34660.

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Carbon dioxide (CO2) and humidity are two factors that affect respirator comfort. Whenever one uses a respirator, CO2 is reinhaled from the previous exhalation and the humidity inside the respirator cavity increases. The CO2 reinhalation causes respirator discomfort with symptoms like headache, dizziness, and etc. The increased humidity causes respirator thermal discomfort. Experimental researches focused on measuring the CO2 and humidity values in the respirator cavity during a long period of time (over 1 hour). However, these experiments ignored CO2 and humidity value variation during a breathing cycle within the respirator cavity. The objective of this study was to use computational fluid dynamics (CFD) method to calculate the CO2 and humidity values inside the respirator cavity during four breathing cycles (19.2s). In our previous work the contact between a headform and a filtering facepiece respirator (FFR) was simulated by the using finite element modeling. In this work a meshed domain was generated including the FFR cavity, the FFR and the region outside of the FFR. A breathing cycle, having both exhalation and inhalation, was then defined as a time-dependent flow rate through a breathing opening (nasal breathing, mouth breathing, and nasal-mouth breathing). Using CFD method, the breathing air flow and the species transport of CO2 and water vapor (H2O) in the domain were simulated for 4 breathing cycles. Totally 5 tests with different breathing openings and different breathing flow rates were conducted: nasal breathing with base, 2 and 3 times flow rate, mouth breathing with base flow rate, and nasal-mouth breathing with base flow rate. The simulation results showed that there were large CO2 and H2O value variations (CO2 mass fraction from 0 to 0.074 and H2O mass fraction 0.0077 and 0.0151) in the FFR cavity during a breathing cycle. The inhaled CO2 mole fraction decreased with increasing breathing flow rate. With the base flow rate, during inhalation the middle point between the nostrils and mouth had higher relative humidity than other probing positions did.
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Shishkin, D. A., A. A. Kolpakova, P. V. Udovik, I. N. Melnikov, and S. Ia Pichkhidze. "Development of a SO2 detoxification respirator." In ТЕНДЕНЦИИ РАЗВИТИЯ НАУКИ И ОБРАЗОВАНИЯ. НИЦ «Л-Журнал», 2015. http://dx.doi.org/10.18411/lj2015-12-23.

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Zhuang, Z., B. Bradtmiller, J. Odencrantz, C. Coffey, D. Campbell, and H. Hsiao. "26. Anthropometric Survey of Respirator Users." In AIHce 2004. AIHA, 2004. http://dx.doi.org/10.3320/1.2758202.

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Reports on the topic "Respirator"

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Hanley, James T., and Karin K. Foarde. Validation of Respirator Filter Efficacy. Fort Belvoir, VA: Defense Technical Information Center, March 2003. http://dx.doi.org/10.21236/ada414930.

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Mensch, Amy, and Nelson Bryner. Emergency first responder respirator thermal characteristics :. Gaithersburg, MD: National Institute of Standards and Technology, 2011. http://dx.doi.org/10.6028/nist.sp.1123.

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Shonka, J. J., J. J. Weismann, and R. J. Logan. Development of conformal respirator monitoring technology. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/477750.

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Johnson, Arthur T. Respirator Performance Rating Tables for Mask Design. Fort Belvoir, VA: Defense Technical Information Center, December 1990. http://dx.doi.org/10.21236/ada253391.

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Hoover, Mark D., and George J. Vargo. Independent Evaluation of The Lepestok Filtering Facepiece Respirator. Office of Scientific and Technical Information (OSTI), July 2001. http://dx.doi.org/10.2172/787352.

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Fenlon, Riley. Facial respirator shape analysis using 3D anthropometric data. Gaithersburg, MD: National Institute of Standards and Technology, 2007. http://dx.doi.org/10.6028/nist.ir.7460.

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Hoover, Mark D., Jack R. Lackey, and George J. Vargo. Independent Evaluation of The Lepestok Filtering Facepiece Respirator. Office of Scientific and Technical Information (OSTI), July 2001. http://dx.doi.org/10.2172/965685.

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Hawk, C. T., and P. E. Rogers. Y-12 Respirator Flow Cycle Time Reduction Project. Office of Scientific and Technical Information (OSTI), December 2000. http://dx.doi.org/10.2172/774311.

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Coyne, Karen M. Anti-Fog Solution for Air-Purifying Respirator Lenses. Fort Belvoir, VA: Defense Technical Information Center, June 2010. http://dx.doi.org/10.21236/ada523313.

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WRIGHT, LARRY J., and PRESTON L. TERRY. Performance Evaluation of the IrisScan2200 Against Four Respirator Masks. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/793325.

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