Zeitschriftenartikel: „Procedural parameters“

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Azari, A., L. Ota, J. Wan, O. El Saccr und D. Martin. „Can Endometrial Thickness Measurement Predict Procedural Parameters during Office Essure Procedure?“ Journal of Minimally Invasive Gynecology 19, Nr. 6 (November 2012): S64. http://dx.doi.org/10.1016/j.jmig.2012.08.197.

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Ammar, Sonia, Elena Ladich, Kristin Steigerwald, Isabel Deisenhofer und Michael Joner. „Pathophysiology of renal denervation procedures: from renal nerve anatomy to procedural parameters“. EuroIntervention 9, R (Mai 2013): R89—R95. http://dx.doi.org/10.4244/eijv9sra15.

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Yoon, Sung-Young, Gon-ho Kim, Yushin Kim, Nack Kim, Sangheon Lee, Christina Kawai und Youngki Hong. „Optimal Parameters for Intervertebral Disk Resection Using Aqua-Plasma Beams“. Journal of Neurological Surgery Part A: Central European Neurosurgery 80, Nr. 01 (14.06.2018): 034–38. http://dx.doi.org/10.1055/s-0038-1655762.

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Objective A minimally invasive procedure for intervertebral disk resection using plasma beams has been developed. Conventional parameters for the plasma procedure such as voltage and tip speed mainly rely on the surgeon's personal experience, without adequate evidence from experiments. Our objective was to determine the optimal parameters for plasma disk resection. Methods Rate of ablation was measured at different procedural tip speeds and voltages using porcine nucleus pulposi. The amount of heat formation during experimental conditions was also measured to evaluate the thermal safety of the plasma procedure. Results The ablation rate increased at slower procedural speeds and higher voltages. However, for thermal safety, the optimal parameters for plasma procedures with minimal tissue damage were an electrical output of 280 volts root-mean-square (Vrms) and a procedural tip speed of 2.5 mm/s. Conclusion Our findings provide useful information for an effective and safe plasma procedure for disk resection in a clinical setting.

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Qin, Xuejie, und Yee-Hong Yang. „Estimating Parameters for Procedural Texturing by Genetic Algorithms“. Graphical Models 64, Nr. 1 (Januar 2002): 19–39. http://dx.doi.org/10.1006/gmod.2002.0565.

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Hwang, Wen-Ping, und Ching-Lin Wang. „Using procedural parameters and continuations in combinatorial searches“. Software: Practice and Experience 24, Nr. 4 (April 1994): 377–86. http://dx.doi.org/10.1002/spe.4380240404.

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van Hest, Annemieke, und Thomas Steckler. „Effects of procedural parameters on response accuracy: lessons from delayed (non-)matching procedures in animals“. Cognitive Brain Research 3, Nr. 3-4 (Juni 1996): 193–203. http://dx.doi.org/10.1016/0926-6410(96)00006-7.

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Doyle, Patricia M., Mark Wolery, Melinda Jones Ault und David L. Gast. „System of Least Prompts: A Literature Review of Procedural Parameters“. Journal of the Association for Persons with Severe Handicaps 13, Nr. 1 (März 1988): 28–40. http://dx.doi.org/10.1177/154079698801300104.

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This manuscript describes an instructional strategy, system of least prompts, and reviews the use of the procedure in the applied research literature. The literature is analyzed in terms of the populations for which the procedure has been used, the type of skills that have been taught with the procedure, and the results when the procedure was employed. The literature also is described in terms of previously identified parameters of the system of least prompts including (a) the number and type of prompts included in the least-to-most assistance prompt hierarchies, (b) the presentation of the target stimulus at each prompt level, (c) use of a fixed response interval, and (d) the delivery of reinforcement following correct prompted and unprompted responses. Summary statements and recommendations about future use and research are included.

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Mosher-Ashley, Pearl M. „Procedural and Methodological Parameters in Behavioral-Gerontological Research: A Review“. International Journal of Aging and Human Development 24, Nr. 3 (April 1987): 189–229. http://dx.doi.org/10.2190/2b3t-7rfn-aym7-c4gg.

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This article analyzes the behavioral-gerontological research published before 1984. The 151 studies located were classified into three main categories: observation, assessment, and intervention. Each study and each category were examined for variations in the behavioral procedures employed, and in the scientific research methods used to collect and analyze data. The survey indicated several serious problems in the research. Much of the behavioral-gerontological research focuses on institutionalized elderly, and tends to perpetuate a passive, helpless role on the part of the elderly in the treatment process. Less than 20 percent of the studies focused on observation or assessment, and most of these were found to be flawed. The intervention studies were also problematic; the majority of them were of short duration and had only one treatment phase which did not vary substantially during the study period. Most also failed to provide for interobserver agreement, generalization, maintenance, and follow-up assessments. Finally, the implications of these findings for future psychological research with the elderly are discussed.

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Kim, Benny S., Barbara Hum, Jung Cheol Park und In Sup Choi. „Retrospective Review of Procedural Parameters and Outcomes of Percutaneous Vertebroplasty in 673 Patients“. Interventional Neuroradiology 20, Nr. 5 (01.01.2014): 564–75. http://dx.doi.org/10.15274/inr-2014-10080.

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Percutaneous vertebroplasty (PVP) is a minimally invasive procedure to treat back pain secondary to osteoporotic vertebral compression fractures (VCF). This study aims to review our techniques and outcomes in patients with VCF. Outcomes of all patients who underwent PVP at our institution from 1998 to 2014 were retrospectively collected from medical records and follow-up telephone interviews. 1174 PVP procedures for VCF in 673 patients were identified to have complete follow-up data. Patients with inadequate data were excluded from the analysis. Procedural aspects such as unipedicular or bipedicular access, vertebral region treated, amount of cement injected into vertebrae, number of levels treated at a single session, refracture rates and location, presence of a necrotic cavity, and pain outcomes were examined. Excellent rates of improvement of back pain for both single level and multilevel PVP were achieved in 92% of patients. Unipedicular or bipedicular approach, cement volume, vertebral region treated, cement extravasation, and presence of a necrotic cavity did not affect pain outcomes or refracture rates. Fractures that did develop after PVP were often adjacent and occurred earlier than distant level fractures. Lumbar vertebrae required more cement than thoracic vertebrae. PVP provides excellent rates of pain relief in both single and multilevel procedures. The procedural aspects evaluated did not affect pain outcome or refracture rates. Adjacent refractures tended to occur sooner than distant ones.

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Keçe, Fehmi, Marta de Riva, Reza Alizadeh Dehnavi, Adrianus P. Wijnmaalen, Bart J. Mertens, Martin J. Schalij, Katja Zeppenfeld und Serge A. Trines. „Predicting early reconnection after cryoballoon ablation with procedural and biophysical parameters“. Heart Rhythm O2 2, Nr. 3 (Juni 2021): 290–97. http://dx.doi.org/10.1016/j.hroo.2021.03.007.

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Lichoń, Daniel. „Modelling of the reference STARs procedures in the context of RPAS integration in non-segregated airspace“. Aircraft Engineering and Aerospace Technology 92, Nr. 9 (15.04.2020): 1385–92. http://dx.doi.org/10.1108/aeat-12-2019-0243.

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Purpose This work presents the part of the research in the integration of the remotely piloted aircraft systems (RPAS) in non-segregated airspace. The purpose of this study is to elaborate the reference shape of the Standard Instrument Arrivals (STARs) procedures of controlled airports. The STARs parameters are unique for the aerodromes and depend on navigational aids (NAVAIDs), manoeuvres and aircraft categories. Therefore, the elaboration of reference shapes was advisable in the context of RPAS integration research. Design/methodology/approach The models were based on the procedure design guidelines by International Civil Aviation Organization. The statistics of existing STARs were prepared using Aeronautical Information Publications to determine the representative procedural parameters. Construction of procedural shapes required to define the nominal flight path and tolerance areas. Findings In statistics, the standard deviation of distances was below the determined reference mean values, thus the models were convergent with existing procedures. Research limitations/implications The modelling was limited to initial, intermediate, final and missed approach segments. Arrival segment was not modelled. NAVAIDs include Instrument Landing System Category 1 (in final and missed approach) and very high-frequency omni-directional ranging or global navigation satellite systems (in initial and intermediate approach segments). Practical implications Prepared models may be used in research in the integration of the new types of aerial vehicles in existing air traffic management systems. Originality/value The reference STARs possess commonly used procedural manoeuvres (straight-in, turn, racetrack and base turn) and different NAVAIDs. The parameters of approach segments were determined as representative of the existing procedures. Moreover, the models are suitable to place at arbitrary origin and runway axis bearing.

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Gallagher, John J. „Capnography Monitoring During Procedural Sedation and Analgesia“. AACN Advanced Critical Care 29, Nr. 4 (15.12.2018): 405–14. http://dx.doi.org/10.4037/aacnacc2018684.

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Procedural sedation is used to alleviate pain and anxiety associated with diagnostic procedures in the acute care setting. Although commonly used, procedural sedation is not without risk. Key to reducing this risk is early identification of risk factors through presedation screening and monitoring during the procedure. Electrocardiogram, respiratory rate, blood pressure, and pulse oximetry commonly are monitored. These parameters do not reliably identify airway and ventilation compromise. Capnography measures exhaled carbon dioxide and provides early identification of airway obstruction and hypoventilation. Capnography is useful in patients receiving supplemental oxygen. In these patients, oxygen desaturation reported by pulse oximetry may lag during episodes of respiratory depression and apnea. Capnography indicates partial pressure of end-tidal carbon dioxide and provides information regarding airway integrity and patterns of ventilation compromise. Implementation of this technology may provide an additional layer of safety, reducing risk of respiratory compromise in patients receiving procedural sedation.

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Mathew, Suresh, C. G. R. Nair und K. N. Ninan. „Quantitative correlations of activation parameters and procedural factors—dependence on reaction type“. Thermochimica Acta 184, Nr. 2 (Juli 1991): 269–94. http://dx.doi.org/10.1016/0040-6031(91)80030-m.

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Roman, Andrei, Federica Palego, Patriciu Achimas-Cadariu, Catalin Vlad, Alexandra Andries, Ciprian Ionut Tomuleasa, Vlad Alexandru Gata, Roxana Pintican, Maria Patricia Rada und Diana Feier. „Prospective investigation of pain associated with ultrasound- and computed tomography-guided percutaneous biopsies in oncological patients“. Medical Ultrasonography 1, Nr. 1 (24.02.2020): 65. http://dx.doi.org/10.11152/mu-2256.

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AimsThe present study aims to investigate the pain, anxiety and other factors that are associated with percutaneous computed tomography (CT)- and ultrasound (US)-guided biopsies of tumors.Material and MethodsThe study prospectively included 60 consecutive patients, of which 24 underwent CT-guided biopsies and 36 US-guided biopsies. The location of targeted tumors was within the thorax, abdomen, pelvis, and limbs. A questionnaire containing numerical rate scales (0-10) regarding procedural and post-procedural pain, anxiety, and other associated parameters was filled out by each patient 2-6 hours after the procedure. CT and ultrasound parameters were compared. The two groups were then pooled together in order to compare pain scores per targeted organ and to analyze the parameters that were associated with pain.ResultsThere was no significant difference between the CT and US group with the exception of the positional discomfort, which was higher in the CT group (p=0.003). The average procedural pain score (2.0) was significantly higher than the post-procedural pain (1.3, p=0.006) and the phlebotomy pain (0.8, p<0.0001). There was no significant difference between the targeted organs with regards to the pain score. The factors that showed a positive correlation with the procedural pain were procedure-related anxiety (p=0.005), positional discomfort (p=0.01), and phlebotomy pain (p=0.0008). The pre interventional use of an analgesic was negatively correlated with the procedural pain (p=0.02).ConclusionsCT- and US- guided percutaneous biopsies are associated with low levels of pain that are generally well tolerated by patients irrespective of the targeted organ.

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Li, Ka Hou Christien, Tian Sang, Cheng Chan, Mengqi Gong, Yingzhi Liu, Aaron Jesuthasan, Guangping Li et al. „Anaesthesia use in catheter ablation for atrial fibrillation: a systematic review and meta-analysis of observational studies“. Heart Asia 11, Nr. 2 (August 2019): e011155. http://dx.doi.org/10.1136/heartasia-2018-011155.

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ObjectivesThis meta-analysis and systematic review seeks to compare both characteristic parameters and procedural outcomes of atrial fibrillation (AF) catheter ablation in patients under general anaesthesia (GA)/deep sedation and mild/moderate sedation.BackgroundCatheter ablation has become a widely applied intervention for treating symptomatic AF and arrhythmias that are refractory to medical therapy. It can be conducted through from mild sedation to GA.MethodsPubMed and Embase were searched up to July 2018 for randomised controlled trials, cohort and observational studies that assessed the outcomes of catheter ablation under GA/deep sedation or mild/moderate sedation. Nine studies were included in this meta-analysis after screening with the inclusion and exclusion criteria. Heterogeneity between studies and publication bias was evaluated by I2 index and Egger’s regression, respectively.ResultsOur meta-analysis found catheter AF ablation with GA/deep sedation to be associated with reduced risk of recurrence (RR: 0.79, 95% CI 0.56 to 1.13, p=0.20) and complications (RR: 0.95, 95% CI 0.64 to 1.42, p=0.82), though statistically insignificant. In terms of procedural parameters, there was no significant difference between the two groups for both procedural time (SMD: −0.13, 95% CI −0.90 to 0.63, p=0.74) and fluoroscopy time (SMD: −0.41, 95% CI −1.40 to 0.58, p=0.41). Univariate meta-regression did not reveal any covariates as a moderating factor for complication and recurrence risk.ConclusionApart from an increased likelihood of procedural success, ablation by GA/deep sedation was found to be non-significantly different from the mild/moderate sedation approach in both procedural parameters and outcome measures.

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Contegiacomo, Andrea, Enrico Maria Amodeo, Alessandro Cina, Carmine Di stasi, Roberto Iezzi, Davide Coppolino, Nico Attempati und Riccardo Manfredi. „Renal artery embolization for iatrogenic renal vascular injuries management: 5 years’ experience“. British Journal of Radiology 93, Nr. 1106 (01.02.2020): 20190256. http://dx.doi.org/10.1259/bjr.20190256.

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Objective: Evaluate the efficacy and safety of renal artery embolization (RAE) for iatrogenic renal vascular injuries (IRVI) management at Fondazione Policlinico Universitario "A. Gemelli" IRCCS, in the last 5 years. Methods: Retrospective analysis of all RAE procedures performed from January 2013 to December 2017. Patients-related (age, sex, vascular variants, hemoglobin and serum creatinine), IRVI-related (type and vascular level of IRVI, presence and extension of hematoma), management-related (temporal interval between diagnostic imaging and RAE) and procedure-related (embolic materials, technical success, clinical success and complications) parameters were evaluated. Results: 28 RAE procedures performed on 28 patients (21 males; 7 females) were included. 19/28 patients had pseudoaneurysm, 7/28 active bleeding and 1/28 arteriovenous fistula; 4/28 patients had a combination of 2 IRVI. The extent of perirenal hematoma showed correlation with the cause of IRVI (p = 0.028). Technical success was achieved in all patients whereas clinical success in 25/28 (89.3%), with 3 patients requiring re-treatment. Minor complications were observed during 2/28 (7.1%) endovascular procedures. No major complications occurred. A longer procedural time was observed in patients with lower pre-procedural levels of hemoglobin (p = 0.016). No differences were found in mean serum creatinine (p = 0.23) before and immediately after treatment, while values of creatinine at 1 week from the procedure were significantly lower (p = 0.04). Conclusion: RAE is safe and effective for the management of iatrogenic IRVI showing high technical and clinical success rate and low complication rate. Advances in knowledge: Low pre-procedural hemoglobin levels increase procedural duration time. Glue alone or in combination with other materials is as safe as coils.

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Al Maruf, Abdullah, Md Mustafa Kamal, Rafiqul Islam und Md Saiful Islam. „Paediatric procedural sedation for radiological imaging“. Journal of the Bangladesh Society of Anaesthesiologists 24, Nr. 2 (02.08.2014): 70–76. http://dx.doi.org/10.3329/jbsa.v24i2.19805.

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Sedation is frequently undertaken for radiological imaging procedures in paediatric patients. Movement during procedure degrades all images of a particular sequence. A deeper level of sedation is needed. The sedation of children is different from the sedation of adult. The safe sedation of children for imaging procedure requires a systematic approach that includes the followings. Careful presedation health evaluation of the child with ASA classification. Appropriate fasting guidelines for sedation procedure. Detailed airway examination for any airway abnormalities that might increase the potential for airway obstruction. Adequate training and skills of sedating personnel in paediatric airway management. Age and size appropriate equipment for airway management and venous access. Adequate medications to combat adverse events. Monitoring of vital parameters during and after the procedure. A properly equipped and staffed recovery area. Recovery to presedation level of consciousness of patient before discharge from medical supervision and appropriate discharge instructions. The whole procedure should be well documented. Children who have contraindications to sedation should be selected for general Anaesthesia. This review article has been made to discuss the need for sedation of children during radiological imaging, currently practiced different regimens of sedation, safe guidelines for sedation and also covers the debate between need for GA versus sedation. DOI: http://dx.doi.org/10.3329/jbsa.v24i2.19805 Journal of Bangladesh Society of Anaesthesiologists 2011; 24(2): 70-76

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Kartashov, Igor I., und Ivan I. Kartashov. „Artificial intelligence: criminal and procedural aspects“. Current Issues of the State and Law, Nr. 17 (2021): 75–89. http://dx.doi.org/10.20310/2587-9340-2021-5-17-75-89.

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For millennia, mankind has dreamed of creating an artificial creature capable of thinking and acting “like human beings”. These dreams are gradually starting to come true. The trends in the development of modern so-ciety, taking into account the increasing level of its informatization, require the use of new technologies for information processing and assistance in de-cision-making. Expanding the boundaries of the use of artificial intelligence requires not only the establishment of ethical restrictions, but also gives rise to the need to promptly resolve legal problems, including criminal and proce-dural ones. This is primarily due to the emergence and spread of legal expert systems that predict the decision on a particular case, based on a variety of parameters. Based on a comprehensive study, we formulate a definition of artificial intelligence suitable for use in law. It is proposed to understand artificial intelligence as systems capable of interpreting the received data, making optimal decisions on their basis using self-learning (adaptation). The main directions of using artificial intelligence in criminal proceedings are: search and generalization of judicial practice; legal advice; preparation of formalized documents or statistical reports; forecasting court decisions; predictive jurisprudence. Despite the promise of using artificial intelligence, there are a number of problems associated with a low level of reliability in predicting rare events, self-excitation of the system, opacity of the algorithms and architecture used, etc.

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Cura, R., J. Perret und N. Paparoditis. „STREETGEN: IN-BASE PROCEDURAL-BASED ROAD GENERATION“. ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences II-3/W5 (20.08.2015): 409–16. http://dx.doi.org/10.5194/isprsannals-ii-3-w5-409-2015.

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Streets are large, diverse, and used for conflicting transport modalities as well as social and cultural activities. Proper planning is essential and requires data. Manually fabricating data that represent streets (street reconstruction) is error-prone and time consuming. Automatising street reconstruction is a challenge because of the diversity, size, and scale of the details (~ cm for cornerstone) required. The state-of-the-art focuses on roads and is strongly oriented by each application (simulation, visualisation, planning). We propose a unified framework that works on real Geographic Information System (GIS) data and uses a strong, yet simple hypothesis when possible to produce coherent street modelling at the city scale or street scale. Because it is updated only locally in subsequent computing, the result can be improved by adapting input data and the parameters of the model. We reconstruct the entire Paris streets in a few minutes and show how the results can be edited simultaneously by several concurrent users.

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Grossmannová, Pavla, und Daniel Švábek. „Procedural Terrain Generation and Path Searching in Education“. International Journal of Information and Communication Technologies in Education 6, Nr. 4 (01.12.2017): 15–26. http://dx.doi.org/10.1515/ijicte-2017-0016.

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Abstract This paper is primarily devoted to development of an educational desktop application, that describes terrain generating and pathfinding to students. The application is meant for lessons of Artificial Intelligence, that is one of compulsory optional subjects on Department of Informatics and Computers, University of Ostrava. Selected implemented algorithms enable to generate a terrain with adjustable parameters in three different implementations and it also enables pathfinding in three different ways. Used methods are compared according to different criteria for better understanding. Algorithms used in the application for terrain generating are fault method, hill algorithm and value noise. For pathfinding, there were used Dijkstra algorithm, A* and breadth-first search. The application enables camera movement around the terrain and graphical projection of costs of edges for pathfinding.

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Ozturk, T. Cimilli, O. Guneysel und H. Akoglu. „Anterior Shoulder Dislocation Reduction Managed Either with Midazolam or Propofol in Combination with Fentanyl“. Hong Kong Journal of Emergency Medicine 21, Nr. 6 (November 2014): 346–53. http://dx.doi.org/10.1177/102490791402100602.

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Objective Procedural Sedation and Analgesia is used in managing emergency painful procedures. The aim of this study is to compare the effects of propofol and midazolam on haemodynamic parameters when used in combination with fentanyl in isolated anterior shoulder dislocations and to measure the patient and physician satisfactions. Methods The study is a randomised single blind prospective trial. All procedural sedations were performed by emergency medicine specialists and the shoulder reductions were performed by orthopaedic surgeons. Two groups were defined. Group A received intravenous fentanyl and midazolam and Group B received intravenous fentanyl and propofol. The orthopaedic surgeons were not informed about the drugs. The emergency medicine specialist observed the patients. The patients and the orthopaedic surgeons were asked for a satisfaction scoring. Results Midazolam group consisted of 37 patients and propofol group consisted of 38 patients. Both groups were similar in demographic characteristics and pre-procedural vital signs. There was only one statistically significant difference at one time and it was the 5th minutes SpO2 levels between groups. There were statistically significant changes in the measurements of vital parameters in both groups when compared with the baseline levels. However none of them was clinically important. In midazolam and propofol group, 10.8% and 10.5% respectively had respiratory compromise. Patient and physician satisfactions were similar in both groups. Conclusions Midazolam and propofol are both relatively safe drugs using in combination with fentanyl in anterior shoulder dislocations. Patients and physicians can be highly satisfied with the two groups of drugs. (Hong Kong j.emerg.med. 2014;21:346-353)

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Mahfoud, F., C. Ukena, O. Adam, M. Dalinghoff, D. Linz, J. Schmidt, B. Scheller, U. Laufs, B. Cremers und M. Boehm. „Procedural parameters during renal denervation and change of blood pressure in patients with resistant hypertension“. European Heart Journal 34, suppl 1 (02.08.2013): 3617. http://dx.doi.org/10.1093/eurheartj/eht309.3617.

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Mumtaz, Zeeshan Ahmed, Avinash Ashok Guthe, Milind Phadke, Zohaib Shaikh, Ajay Umakant Mahajan und Pratap J. Nathani. „Role of pre-procedural laboratory parameters in predicting in stent restenosis of drug eluting stents“. Indian Heart Journal 70 (November 2018): S42. http://dx.doi.org/10.1016/j.ihj.2018.10.127.

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Hendriks, Astrid A., Zsuzsanna Kis, Ferdi Akca, Sing-Chien Yap, Sip A. Wijchers, Rohit E. Bhagwandien und Tamas Szili-Torok. „Extensive scar modification for the treatment of intra-atrial re-entrant tachycardia in patients after congenital heart surgery“. Cardiology in the Young 30, Nr. 9 (23.07.2020): 1231–37. http://dx.doi.org/10.1017/s1047951120001900.

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AbstractBackground:Catheter ablation is an important therapeutic option for atrial tachycardias in patients with CHD. As a result of extensive scarring and surgical repair, multiple intra-atrial re-entrant tachycardia circuits develop and serve as a substrate for arrhythmias. The best ablation approach for patients with multiple intra-atrial re-entrant tachycardias has not been investigated. Here, we compared substrate-based ablation using extensive scar modification to conventional ablation.Methods:The present study included patients with surgically corrected CHD that underwent intra-atrial re-entrant tachycardia ablation. Extensive scar modification was defined as substrate ablation based on a dense voltage map, aimed to eliminate all potentials in the scar region. The control group had activation mapping-based ablation. A clinical composite endpoint was assessed. Points were given for type, number, and treatment of intra-atrial re-entrant tachycardia recurrence.Results:In 40 patients, 63 (extensive scar modification 13) procedures were performed. Acute procedural success was achieved in 78%. Procedural duration was similar in both groups. Forty-nine percent had a recurrence within 1 year. During a 5-year follow-up (2.5–7.5 years), 46% required repeat catheter ablation. Compared to baseline, clinical composite endpoint significantly decreased by 46% after 12 months (p = 0.001). Acute procedural success, procedural parameters, recurrence and repeat ablation were similar between extensive scar modification and activation mapping-based ablation.Conclusion:Catheter ablation using extensive scar modification for intra-atrial re-entrant tachycardias occurring after surgically corrected CHD illustrated similar short- and long-term outcomes and procedural efficiency compared to catheter ablation using activation mapping-based ablation. The choice of ablation approach for multiple intra-atrial re-entrant tachycardia should remain at the discretion of the operator.

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Sharipova, A. R. „The Quality of Justice in Criminal, Arbitrazh, Civil and Administrative Cases: Comparison by Individual Parameters“. Lex Russica, Nr. 11 (15.11.2020): 53–61. http://dx.doi.org/10.17803/1729-5920.2020.168.11.053-061.

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Based on statistics and survey results the author highlights that there is a markedly lower quality of criminal justice as compared with arbitrazh (commercial) disputes. The comparison is based on six indicators: the distribution of cases among judges, the capabilities of the information system, the policy of the use of telecommunications technologies, the observance of procedural deadlines, adherence of the court to timelines and the use of mediation procedures. The selected parameters have been developed by the European Commission for the Efficiency of Justice and reflect not only the organizational but also the procedural features of each of the types of proceedings under consideration.The author supports the concept of judicial law, and, therefore, the study is devoted to finding unreasonable differences in the quality of justice in some types of justice. These include: automated distribution of cases in courts of general jurisdiction which is affected by the will of operators to the extent in which it is implemented in arbitrazh courts; lack of necessary “e-justice” tools in "Pravosudie" Stat Automated System (GAS "Pravosudie"); insufficient use of video-conferencing by the courts of general jurisdiction, unwillingness to conduct an electronic case and remote formalization with cases; continous consideration of criminal cases in comparison with arbitrazh and other cases; disrespect of the courts of general jurisdiction for the time of the proceedings’ participants; refusal of the court to promote amicable settlement of criminal disputes. Fully aware of all the differences between criminal and arbitrazh proceedings on many grounds: both the existence (or absence) of formalized pretrial proceedings and qualitative characteristics of the parties and their representatives and the specific weight of the cases dealt with by the courts in the total scope of all legal cases in the country, the author nevertheless considers that according to the indicators applied by the European Commission for the Efficiency of Justice all types of domestic proceedings are still comparable, and the apparent differences in accessibility and quality of justice are not unavoidable.

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Errahmouni, Abdelkarim, Decebal Gabriel Latcu, Sok-Sithikun Bun, Nicolas Rijo, Céline Dugourd und Nadir Saoudi. „Remotely controlled steerable sheath improves result and procedural parameters of atrial fibrillation ablation with magnetic navigation“. Europace 17, Nr. 7 (05.02.2015): 1045–50. http://dx.doi.org/10.1093/europace/euu388.

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Najafi, N., A. Van de Velde und J. Poelaert. „Alterations in haemodynamic parameters during procedural sedation and analgesia in children: Is ketamine really to blame?“ Human & Experimental Toxicology 37, Nr. 1 (25.01.2017): 102–3. http://dx.doi.org/10.1177/0960327116689718.

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Hell, Michaela M., Lukas Biburger, Mohamed Marwan, Annika Schuhbaeck, Stephan Achenbach und Martin Arnold. „Prediction of fluoroscopic angulation for transcatheter aortic valve implantation by CT angiography: Influence on procedural parameters“. Journal of Cardiovascular Computed Tomography 10, Nr. 2 (März 2016): e10-e11. http://dx.doi.org/10.1016/j.jcct.2015.12.028.

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Muntean, Bogdan, Klaus-Jürgen Gutleben, Johannes Heintze, Jürgen Vogt, Dieter Horstkotte und Georg Nölker. „Magnetically guided irrigated gold-tip catheter ablation of persistent atrial fibrillation—techniques, procedural parameters and outcome“. Journal of Interventional Cardiac Electrophysiology 35, Nr. 2 (24.05.2012): 163–71. http://dx.doi.org/10.1007/s10840-012-9689-y.

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Mirolo, A., G. Viart, A. Savoure, B. Godin, O. Raitiere, H. Eltchaninoff und F. Anselme. „Are procedural parameters predictive of atrial fibrillation recurrence after pulmonary vein isolation using second generation cryoballoon?“ Archives of Cardiovascular Diseases Supplements 11, Nr. 2 (April 2019): 268–69. http://dx.doi.org/10.1016/j.acvdsp.2019.02.185.

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Wolery, Mark, Ariane Holcombe, Catherine Cybriwsky, Patricia Munson Doyle, John W. Schuster, Melinda Jones Ault und David L. Gast. „Constant time delay with discrete responses: A review of effectiveness and demographic, procedural, and methodological parameters“. Research in Developmental Disabilities 13, Nr. 3 (Mai 1992): 239–66. http://dx.doi.org/10.1016/0891-4222(92)90028-5.

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Widaman, Keith F., und Jerry S. Carlson. „Procedural effects on performance on the Hick paradigm: Bias in reaction time and movement time parameters“. Intelligence 13, Nr. 1 (Januar 1989): 63–85. http://dx.doi.org/10.1016/0160-2896(89)90007-x.

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Alekseeva, Elena Sergeevna, Fedor Yurevich Vasilev, Nataliya Viktorovna Lantukh, Maksim Anatolevich Makarenko und Sofya Dmitrievna Shestakova. „Models of procedural management of criminal prosecution in Russia and foreign countries“. SHS Web of Conferences 108 (2021): 04005. http://dx.doi.org/10.1051/shsconf/202110804005.

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The article is devoted to the study of foreign and Russian models of procedural management of criminal prosecution. The authors propose general theoretical approaches that made it possible to conduct their systemic analysis and comparison. Prerequisites for the research: the necessity to reform legislation in terms of procedural management of criminal prosecution, optimize the distribution of procedural functions between the official subjects of criminal procedural activity. Purpose of the research: to create a theoretical model of procedural management of criminal prosecution based on historical and comparative-legal analysis of Russian and foreign structures. Results and novelty: An abstract (theoretical) model of managing criminal prosecution is a set of procedural parameters reflecting: 1) The coincidence of the head of the criminal prosecution and the subject who initiated it, or the absence of such a coincidence; 2) Unity or plurality of subjects of procedural management, their subordination; 3) The presence or absence of a combination of managerial powers with supervisory and control powers; 4) Correlation of the management with the procedural independence of the subject conducting the criminal prosecution; 5) The coincidence of the head of the criminal prosecution and the public prosecutor in one person; 6) Freedom and limits of disposal of the subject of criminal prosecution, and criminal action; 7) The powers of the head of the criminal prosecution to terminate the case and withdraw the charges. The scientific novelty of the research is determined by the range of analyzed problems, taking into account the changes that occur in the field of criminal proceedings, as well as the need for an optimal distribution of powers in the procedural management of criminal prosecution.

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Anadol, Remzi, Annika Mühlenhaus, Ann-Kristin Trieb, Alberto Polimeni, Thomas Münzel und Tommaso Gori. „Five Years Outcomes and Predictors of Events in a Single-Center Cohort of Patients Treated with Bioresorbable Coronary Vascular Scaffolds“. Journal of Clinical Medicine 9, Nr. 3 (20.03.2020): 847. http://dx.doi.org/10.3390/jcm9030847.

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Introduction: We report outcome data of patients treated with coronary bioresorbable scaffolds up to 5 years and investigate predictors of adverse events. Methods: Consecutive patients treated with at least one coronary bioresorbable scaffold (BRS, Abbott Vascular, Santa Clara, USA) between May 2012 and May 2014 in our center were enrolled. Clinical/procedural characteristics and outcome data at 1868 (1641–2024) days were collected. The incidence of scaffold thrombosis (ScT), restenosis (ScR), and target lesion failure (TLF) and their predictors were investigated using Kaplan–Meier and Cox regression analysis. Results: 512 consecutive patients and 598 lesions were included in the database. A total of 30 ScT, 42 ScR, and 92 TLF were reported. The rate of ScT was 3.6% in the first year, 2.2% in the second–third year, and 0.6% in the fourth–fifth year after implantation. The corresponding rates of ScR were 2.5%, 5.7%, and 1.1%. The corresponding incidence of TLF was 8.8%, 8.0%, 3.8%. Procedural parameters (vessel size, scaffold footprint) and the technique used at implantation (including predilation, parameters of sizing, and postdilation) were predictors of ScT and TLF in the first three years after implantation. In contrast, only diabetes was predictive of events between 4–5 years (HR 6.21(1.99–19.40), p = 0.002). Conclusions: After device resorption, the incidence of very late adverse events in lesions/patients implanted with a BRS decreases. Procedural and device-related parameters are not predictors of events anymore.

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Rakhimov, Kudrat, Andrea Buono, Remzi Anadol, Helen Ullrich, Maike Knorr, Majid Ahoopai, Thomas Münzel und Tommaso Gori. „Randomised, non-inferiority, controlled procedural outcomes TrIal comParing reverse T And Protrusion versus double-kissing and crush stenting: protocol of the TIP TAP I randomised trial“. BMJ Open 10, Nr. 6 (Juni 2020): e034264. http://dx.doi.org/10.1136/bmjopen-2019-034264.

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IntroductionTo assess the impact of ‘reverse T and Protrusion’ (TAP) technique on the outcome after stenting of true bifurcation lesions of the left main (LM) or proximal epicardial vessels as compared with double kissing (DK)-crush technique.Methods and analysis50 consecutive patients with true coronary bifurcation lesion (Medina 1,1,1 or 0,1,1) of the LM or the proximal main vessels, requiring a two-stent technique as first-line strategy at University Medical Center Mainz, are randomised in a 1:1 ratio to reverse TAP or DK-crush stenting. As recommended by best clinical practice, final angiographic result is evaluated and optical coherence tomographic (OCT) intracoronary imaging is performed to assess and optimise the final result. The primary end point is defined as the percentage of stent expansion in the side branch. Secondary end points consist of angiographic and procedural success (assessed until patient’s discharge), procedural parameters (procedural time, fluoroscopy time, use of devices, X-ray dose) and OCT parameters expressing expansion of the stents. Safety parameters include all adverse events up to 6 months after discharge. A clinical, angiographic and intracoronary imaging control at 6 months is planned.Ethics and disseminationThe protocol complies with good clinical practice and the ethical principles described in the Declaration of Helsinki and is approved by the local ethics committee. The results of the trial will be published as original article(s) in medical journals and/or as presentation at congresses.Trial registration numberClinicalTrials.gov Registry (NCT03714750)

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Dusak, Abdurrahim, Hatice E. Soydinc, Hakan Onder, Faysal Ekinci, Neval Y. Görük, Cihat Hamidi und Aslan Bilici. „Venous Intravasation as a Complication and Potential Pitfall During Hysterosalpingography: Re-Emerging Study with a Novel Classification“. Journal of Clinical Imaging Science 3 (31.12.2013): 67. http://dx.doi.org/10.4103/2156-7514.124105.

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Objectives: Presently, hysterosalpingography (HSG) is used as a means to evaluate women with infertility and repetitive pregnancy loss. Venous intravasation is a complication and potential pitfall during HSG and analogous procedures including hysteroscopy. The aim of our study was to assess the venous intravasation and to obtain critical information for more secure and more accurate procedures. In particular, the primary goal of the present study was to compare HSG without and with intravasation to identify differences seen on HSG and to assess the predisposing factors of intravasation. The secondary goal was to describe clinical- and imaging-based novel classification of intravasation. Materials and Methods: This study included a patient cohort of 569 patients who underwent HSG between 2008 and 2011 at our center in the absence (control group) or presence (study group) of intravasation. Intravasation classified from level 0 (no intravasation) to level 3 (severe intravasation) was compared with preprocedural (demographic and clinical) and procedural (HSG) data. Data were analyzed using Statistical Package for Social Sciences (SPSS) statistical software. Results: Of the 569 patients undergoing HSG, 528 showed no intravasation and 41 (7.2%) patients showed intravasation when associated with preprocedural (leukocytes, menometrorrhagia, secondary infertility, ectopic pregnancy, abortus, polycystic ovaries, endometriosis, and interventions) and procedural (pain, scheduling, endometrial-uterine nature, and spillage) parameters. Moreover, intravasation was lower in women with smooth endometrium, triangular uterus, and homogeneous peritoneal spillage. No association was found between age, tubal patency, increased pressure, and intravasation. Conclusions: Using a novel classification method, intravasation can be observed in women during HSG and associates with preprocedural and procedural predisposing factors in subsumed conditions. This classification method will be useful for improving the efficiency and accuracy of HSG and related procedures by minimization of severe complications caused by intravasation.

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Nandikonda, Srichandana, und Edward W. Davis. „Parameters Affecting the Microwave-Assisted Polyol Synthesis of Silver Nanorods“. ISRN Nanotechnology 2011 (30.10.2011): 1–7. http://dx.doi.org/10.5402/2011/104086.

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The effects of salt chemistry and concentration on the morphology and yield of silver nanorods produced by the microwave-assisted polyol synthesis are reported. Compared to NaCl, iron and copper salts reduced nanorod yield and length and increased diameter. This is in stark contrast to expectations based on the slower traditional polyol process. The role of the cation was further explored using MgCl2 and MnCl2 which showed different concentration dependent effects on nanorod diameter. In addition, the morphology and yield of nanomaterials was found to be significantly influenced by small variations in the procedure including container shape and the time between reactant mixing and microwave heating. These results highlight that, while the microwave-assisted process is very promising, results cannot be directly anticipated based on the traditional process, and the synthesis is very sensitive to procedural changes.

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Wenk, Manuel, Christian Weiss, Michael Möllmann und Daniel Matthias Pöpping. „Procedural Complications of Spinal Anaesthesia in the Obese Patient“. Anesthesiology Research and Practice 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/165267.

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Background. Complications of spinal anaesthesia (SpA) range between 1 and 17%. Habitus and operator experience may play a pivotal role, but only sparse data is available to substantiate this claim.Methods. 161 patients were prospectively enrolled. Data such as spread of block, duration of puncture, number of trials, any complication, operator experience, haemodynamic parameters, was recorded and anatomical patient habitus assessed.Results. Data from 154 patients were analyzed. Success rate of SpA in the group of young trainees was 72% versus 100% in the group of consultants. Trainees succeeded in patients with a normal habitus in 83.3% of cases versus 41.3% when patients had a difficult anatomy (P=0.02). SpA in obese patients (BMI ≥ 32) was associated with a significantly longer duration of puncture, an increased failure ratio when performed by trainees (almost 50%), and an increased number of bloody punctures.Discussion. Habitus plays a pivotal role for SpA efficiency. In patients with obscured landmarks, failure ratio in unexperienced operators is high. Hence, patient prescreening as well as adequate choice of operators may be beneficial for the success rate of SpA and contribute to less complications and better patient and trainee satisfaction.

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Glowniak, Tarkowski, Wojewoda, Wysokinska, Kozak, Wacinski und Wysokinski. „Atrial Fibrillation Ablation with Multipolar Phased-Radiofrequency Catheter: The Learning Curve Effect for Procedural Parameters, but not for the Long-Term Outcome“. Journal of Clinical Medicine 8, Nr. 10 (02.10.2019): 1589. http://dx.doi.org/10.3390/jcm8101589.

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Background: Pulmonary vein isolation (PVI) is a routine treatment in atrial fibrillation (AF). Single-shot techniques were introduced to simplify the procedure. We analyzed time-dependent changes in procedural parameters, acute success, complication rates, and long-term outcomes during our initial experience with multipolar phased-radiofrequency (RF) ablation. Methods and Results: The first 126 consecutive patients (98 male; age: 58.8 ± 8.7 years) who underwent PVI with phased-RF ablation at our center were included in the study. Procedural parameters, complication rate, acute success and 12-month efficacy were compared in the first, second and third group of 42 consecutive patients. In all patients, 516/526 PVs were effectively isolated (98.1%), with no differences between the tierces (p = 0.67). Procedure (169.8 vs. 132.9 vs. 105.8 min, p < 0.0001), fluoroscopy (32.9 vs. 24.3 vs. 14.1 min, p < 0.0001) and left atrial dwell (83.0 vs. 61.9 vs. 51.4 min, p < 0.0001) times were significantly reduced with experience in tierces 1–3, respectively. In the 12-month follow-up, 60.3% of patients were arrhythmia-free with no differences between the tierces (p = 0.88). In multivariate analysis, the relapse in the blanking period (p < 0.0001), time from AF diagnosis (p = 0.004) and left atrial diameter (p = 0.012) were the only independent predictors of AF recurrence. Conclusions: The learning curve effect was demonstrated in procedural parameters, but not in the complication rate nor the long-term success of PVI with phased-RF technique. The relapse in the blanking period was the strongest predictor of treatment failure in long-time observation.

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Emel'yanov, P. N. „Procedural error of reflexometric determination of surface roughness parameters caused by the inadequacy of the correlation function“. Measurement Techniques 39, Nr. 9 (September 1996): 920–27. http://dx.doi.org/10.1007/bf02369841.

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Aggarwal, Vipul, Peter Lim, Patrick H. LAM und Philip I. Craig. „Su1643 Assessment of Balloon-Assisted Cholangioscopy Learning Curve With Respect To Parameters of Procedural Competence and Safety“. Gastrointestinal Endoscopy 79, Nr. 5 (Mai 2014): AB351. http://dx.doi.org/10.1016/j.gie.2014.02.387.

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Forzano, L. B., M. Sorama, M. O’Keefe, K. Pizzonia, T. Howard und N. Dukic. „Impulsivity and self-control in elementary school children and adult females: Using identical task and procedural parameters“. Behavioural Processes 188 (Juli 2021): 104411. http://dx.doi.org/10.1016/j.beproc.2021.104411.

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Dong, Junyu, Jun Liu, Kang Yao, Mike Chantler, Lin Qi, Hui Yu und Muwei Jian. „Survey of Procedural Methods for Two-Dimensional Texture Generation“. Sensors 20, Nr. 4 (19.02.2020): 1135. http://dx.doi.org/10.3390/s20041135.

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Textures are the most important element for simulating real-world scenes and providing realistic and immersive sensations in many applications. Procedural textures can simulate a broad variety of surface textures, which is helpful for the design and development of new sensors. Procedural texture generation is the process of creating textures using mathematical models. The input to these models can be a set of parameters, random values generated by noise functions, or existing texture images, which may be further processed or combined to generate new textures. Many methods for procedural texture generation have been proposed, but there has been no comprehensive survey or comparison of them yet. In this paper, we present a review of different procedural texture generation methods, according to the characteristics of the generated textures. We divide the different generation methods into two categories: structured texture and unstructured texture generation methods. Example textures are generated using these methods with varying parameter values. Furthermore, we survey post-processing methods based on the filtering and combination of different generation models. We also present a taxonomy of different models, according to the mathematical functions and texture samples they can produce. Finally, a psychophysical experiment is designed to identify the perceptual features of the example textures. Finally, an analysis of the results illustrates the strengths and weaknesses of these methods.

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Khitryuk, Vera Valerevna. „Inclusive education: educational technology readiness of formation of perspective of teachers“. Moscow University Pedagogical Education Bulletin, Nr. 1 (30.03.2015): 100–112. http://dx.doi.org/10.51314/2073-2635-2015-1-100-112.

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The article reveals the essence of a meta-competence-contextual technology (MCCT) of formation inclusive readiness of the perspective teachers; conceptual part, the content of education, procedural (technological) characteristics, software and methodological support and criterion-evaluation part of the technology are justified; classification parameters are formulated.

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Depew, WT, LC Hookey, SJ Vanner, JA Louw, CE Lowe, MJ Ropeleski, MJ Beyak, A. Lazarescu und WG Paterson. „Opportunity Costs of Gastrointestinal Endoscopic Training in Canada“. Canadian Journal of Gastroenterology 24, Nr. 12 (2010): 733–38. http://dx.doi.org/10.1155/2010/304689.

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BACKGROUND: No data exist to define the opportunity costs related to instruction in endoscopic procedures in Royal College of Physicians and Surgeons of Canada-accredited teaching centres. Academic and institutional administrators expect staff to achieve acceptable performance standards. There is a need to measure some of the effects of training activity in the establishment of such standards.OBJECTIVE: To measure the effect of resident training in colonoscopy on real procedure times and, as a secondary goal, to estimate procedural losses related to the process of training.METHODS: Real procedure times for ambulatory colonoscopy in a single academic, hospital-based endoscopy unit were documented. Times for certified endoscopy instructors functioning solo were compared with times for procedures involving trainees at several levels of colonoscopic experience. Procedural reductions associated with resident training were estimated based on the parameters derived from the results. The analysis was executed retrospectively using prospectively collected data.RESULTS: Resident training prolonged procedure times for ambulatory colonoscopy by 50%. The trainee effect was consistent, although variable in degree, among a variety of endoscopy instructors. Such increased procedure times have the potential to reduce case throughput and endoscopist remuneration.CONCLUSIONS: Resident training in colonoscopy in a Canadian certified training program has significant negative effects on case throughput and endoscopist billings. These factors should be considered in any assessment of performance in similar training environments.

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Takam, P. C., D. Höfflin und M. Heinke. „QRS and QT ventricular conduction times and permanent pacemaker therapy after transcatheter aortic valve implantation“. Current Directions in Biomedical Engineering 1, Nr. 1 (01.09.2015): 124–26. http://dx.doi.org/10.1515/cdbme-2015-0032.

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AbstractTranscatheter aortic valve implantation is a therapy for patients with reduced left ventricular ejection fraction and symptomatic aortic stenosis. The aim of the study was to compare the pre-and post- transcatheter aortic valve implantation procedures to determine the QRS and QT ventricular conduction times as a potential predictor of permanent pacemaker therapy requirement after transcatheter aortic valve implantation. QRS and QT ventricular conduction times were prolonged after transcatheter aortic valve implantation in heart failure patients with permanent dual chamber pacemaker therapy after transcatheter aortic valve implantation. QRS and QT ventricular conduction times may be useful parameters to evaluate the risk of post-procedural ventricular conduction block and permanent pacemaker therapy in transcatheter aortic valve implantation.

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Hassan, Hussein J., Traci Housten, Aparna Balasubramanian, Catherine E. Simpson, Rachel L. Damico, Stephen C. Mathai, Paul M. Hassoun, Jochen Steppan, Peter J. Leary und Todd M. Kolb. „A novel approach to perioperative risk assessment for patients with pulmonary hypertension“. ERJ Open Research 7, Nr. 3 (11.06.2021): 00257–2021. http://dx.doi.org/10.1183/23120541.00257-2021.

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RationalePulmonary hypertension (PH) is associated with significant perioperative morbidity and mortality. We hypothesised that pulmonary arterial hypertension (PAH) composite risk assessment scores could estimate perioperative risk for PH patients when adjusted for inherent procedural risk.MethodsWe identified patients in the Johns Hopkins PH Center Registry that had noncardiac surgery (including endoscopies) between September 2015 and January 2020. We collected information on preoperative patient-level and procedural variables and used logistic regression to evaluate associations with a composite outcome of death within 30 days or serious postoperative complication. We generated composite patient-level risk assessment scores for each subject and used logistic regression to estimate the association with adverse surgical outcomes. We adjusted multivariable models for inherent procedural risk of major cardiovascular events and used these models to generate a numerical PH perioperative risk (PHPR) score.ResultsAmong 150 subjects, 19 (12.7%) reached the primary outcome, including 7 deaths (4.7%). Individual patient-level and procedural variables were associated with the primary outcome (all p<0.05). A composite patient-level risk assessment score built on three noninvasive parameters was strongly associated with reduced risk for poor outcomes (OR=0.4, p=0.03). This association was strengthened after adjusting the model for procedural risk. A PHPR score derived from the multivariable model stratified patients into low (0%), intermediate (≤10%), or high (>10%) risk of reaching the primary outcome.ConclusionComposite PAH risk assessment scores can predict perioperative risk for PH patients after accounting for inherent procedural risk. Validation of the PHPR score in a multicentre, prospective cohort is warranted.

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Rau, Andrew C., Ryan Siskey, Jorge A. Ochoa und Tracy Good. „Factors Affecting Lethal Isotherms During Cryoablation Procedures“. Open Biomedical Engineering Journal 10, Nr. 1 (29.06.2016): 62–71. http://dx.doi.org/10.2174/1874120701610010062.

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Background: Creating appropriately-sized, lethal isotherms during cryoablation of renal tumors is critical in order to achieve sufficiently-sized zones of cell death. To ensure adequate cell death in target treatment locations, surgeons must carefully select the type, size, location, and number of probes to be used, as well as various probe operating parameters. Objective: The current study investigates the effects of probe type, operating pressure, and clinical method on the resulting sizes of isotherms in an in vitro gelatin model. Method: Using a total of four cryoprobes from two manufacturers, freeze procedures were conducted in gelatin in order to compare resulting sizes of constant temperature zones (isotherms). The effects of certain procedural parameters which are clinically adjustable were studied. Results: Test results show that the sizes of 0 °C,-20 °C and -40 °C isotherms created by similarly-sized probes from two different manufacturers were significantly different for nearly all comparisons made, and that size differences resulting from changing the operating pressure were not as prevalent. Furthermore, isotherm sizes created using a multiple freeze procedure (a ten minute freeze, followed by a five minute passive thaw, followed by another ten minute freeze) did not result in statistically-significant differences when compared to those created using a single freeze procedure in all cases. Conclusion: These results indicate that selection of the probe manufacturer and probe size may be more important for dictating the size of kill zones during cryoablation than procedural adjustments to operating pressures or freeze times.

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Area, Corey, Christopher J. Yen, Patricia Chevez-Barrios, Cynthia Herzog, Peter Kan, Wei Zheng, Frank Lin, Murali Chintagumpala, Dan Gombos und Stephen R. Chen. „Technical and anatomical factors affecting intra-arterial chemotherapy fluoroscopy time and radiation dose for intraocular retinoblastoma“. Journal of NeuroInterventional Surgery 11, Nr. 12 (13.06.2019): 1273–76. http://dx.doi.org/10.1136/neurintsurg-2019-014910.

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BackgroundIntra-arterial chemotherapy has an increasingly prominent role in the management of retinoblastoma. One concern regarding this technique is procedural radiation exposure.ObjectivesTo examine the effects of our institution’s procedural technique on fluoroscopy parameters for patients undergoing intra-arterial chemotherapy infusions for intraocular retinoblastoma. Secondary goals included describing the effect of anatomical variations of the carotid siphon and ophthalmic artery on radiation dose.MethodsA retrospective review of pediatric patients with retinoblastoma referred to interventional neuroradiology for chemosurgery was performed. Techniques were classified as: A (1.2 Fr or 1.5 Fr microcatheter with continuous verapamil flush, advanced without guide through a 2 Fr sheath) or B (1.5 Fr or 1.7 Fr microcatheter advanced within a 4 Fr base catheter, through a 4 Fr sheath). Statistical analysis was performed to determine if there was a significant difference in fluoroscopy parameters based on technique or due to anatomical variation.Results26 patients were treated with 94 intra-arterial chemotherapy infusions. 34 procedures were performed using technique A and 60 using technique B. Mean fluoroscopy time (4.75 min), fluoroscopy dose (23.3 mGy), and dose–area product (DAP; 85.2 μGy.m2) for technique A were significantly lower (p value <0.05) than for technique B, 14.0 min., 191 mGy, and 586 μGy.cm2, respectively.ConclusionsMicrocatheter-only technique with continuous verapamil infusion resulted in decreased fluoroscopy times, DAP, and radiation doses at our institution for the treatment of intraocular retinoblastoma. Furthermore, our fluoroscopy times using this technique are the lowest reported in the current literature. Additionally, our anatomical analysis has demonstrated a positive correlation between increasing vessel tortuosity and fluoroscopy times.

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García de la Sienra, Adolfo. „Teoría general de las decisiones“. Crítica (México D. F. En línea) 23, Nr. 67 (13.12.1991): 41–58. http://dx.doi.org/10.22201/iifs.18704905e.1991.794.

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Starting from Simon's (1976) opposition between procedural and substantive rationality, the paper addresses the question whether it is possible to characterize the former in general terms, and discusses the problem of overcoming the aforementioned opposition. It tries to show, by means of the concept of a general decision structure, that even though it is not possible to characterize procedural rationality in an exhaustive and fully general way, at least it is possible to introduce a scheme within which it is possible to pose problems of procedural rationality, or even to postulate sorne axiomatic restrictions for the same, It is not hard to see that substantive rationality is a particular case of this scheme, namely, the case in which it is possible to measure certain theoretical parameters and adopt as rules of decision certain classical principIes grounded upon the concept of expected utility. The paper does not provide, however, the details that show how the special theory is obtained out of the more general one. [A. G. S.]

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