Download or read book Development of Iso DCS Risk Air and Nitrox Decompression Tables Using Statistical Bubble Dynamics Models written by Wayne A. Gerth and published by . This book was released on 1996 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science of Diving written by Bruce Wienke and published by CRC Press. This book was released on 2015-06-01 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: While the effects of pressure change are readily quantified in physics, chemistry, and engineering applications, the physiology, medicine, and biology of pressure changes in living systems are much more complicated. This complex science translated to technical diving is discussed in a five-part series, with each topic self-contained and strategical
Download or read book Survival Analysis and Maximum Likelihood Techniques as Applied to Physiological Modeling written by Undersea and Hyperbaric Medical Society. Workshop and published by . This book was released on 2002 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reverse Dive Profiles written by and published by . This book was released on 2000 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bennett and Elliott s Physiology and Medicine of Diving written by Alf O. Brubakk and published by Saunders Limited.. This book was released on 2003 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thoroughly updated edition, considered the 'bible' in this field since 1969, offers in-depth coverage of the physiological basis of safe diving and the pathogenesis of diving illnesses; the clinical diagnosis and management of diving disorders; and current equipment design and its practical clinical applications. Also covered is a current understanding of central nervous system pathology, contemporary decompression theories, and state-of-the-art treatment protocols for decompression, drowning and hypothermia.
Download or read book Methods and Techniques of Underwater Research written by American Academy of Underwater Sciences and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 13th Meeting of the United States Japan Cooperative Program in Natural Resources UJNR Panel on Diving Physiology written by United States-Japan Cooperative Program in Natural Resources. Panel on Diving Physiology. Meeting and published by . This book was released on 1996 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Diving in Depth written by B. R. Wienke and published by . This book was released on 2001 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Maritime Health written by and published by . This book was released on 1999 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Bubble Dynamics Algorithms for Assessment of Altitude Decompression Sickness Incidence written by and published by . This book was released on 1995 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air Force personnel are routinely exposed to atmospheric decompressions that often incur significant risk of decompression sickness (DCS). Management of these risks requires analytic methods able to: (a) define risk/hazard envelopes for all routine and emergency decompressions, (b) assess the DCS risks included or introduced in the contemplation or design of new operational procedures and equipment, and; (c) support real-time monitoring of DCS risk incurred by personnel during various chamber and aircraft operations. Present work contributed to meeting these requirements through development and application of methods by which DCS risks during decompression profiles are determined from statistical/biophysical models of in vivo gas exchange and bubble growth and resolution using maximum likelihood, both logistic and survival models were fit to DCS incidence data from the USAF Armstrong Laboratory (USAFAL) for a wide variety of decompression profiles. The models were incorporated into software that operates on personal computers. System software, including a data transcription routine to serve as a software interface between the USAFAL Hypobaric Decompression Sickness Database and the present modeling system, was delivered for use and evaluation of USAFAL personnel.
Download or read book Statistically Based Decompression Tables II Equal Risk Air Diving Decompression Schedules written by P. K. Weathersby and published by . This book was released on 1985 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several sets of equal risk air decompression tables were calculated using a new methodology. Empirical decompression risk models were used to predict the probability of decompression sickness (DCS) for a given pressure exposure. These probabilistic models, earlier shown to have a considerable ability to separate tabulated experimental air dives according to DCS risk, were used to choose decompression schedules with an acceptable risk. The levels of risk used were 1% and 5% for standard air dives with an additional set of 0.5% no-decompression limits. As the new method calculates risk according to an integral over the dive and postdive period, many possible decompression schemes will have the same risk. The best schedules are defined as those requiring minimal total decompression time for the specified risk and subject to operational constraints. The constraints used here are decompression stops at even 10-ft intervals of depth for whole minutes. An algorithm was developed to obtain schedules in a partially optimal manner. The methodology can be used directly to produce tables for other operational constraints or risk levels. Because of the known limitations of source data and risk models, these tables represent considerable extrapolation from known procedures and should not be considered for use without testing.
Download or read book Pressure written by and published by . This book was released on 1995 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistically Based Decompression Tables I Analysis of Standard Air Dives 1950 1970 written by P. K. Weathersby and published by . This book was released on 1985 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large number of air dives was examined by a new methodology. Several essentially empirical models of decompression risk were considered that predicted the probability of decompression sickness (DCS) for a given pressure exposure to avoid the indefinitely sharp threshold parameters that have characterized previous calculation of decompression tables. The candidate models used several distinct formulations of tissue gas exchange kinetics and summed tissue overpressures that are calculated during the dive to estimate decompression risk. The models were compared to decompression outcome data using the statistical principle of maximum likelihood. Reported decompression trials from American, British, and Canadian Naval laboratories were examined individually and collectively to evaluate the probabilistic models and their parameters. Only two to five parameters were found to be justified by the available data (more than 1,700 individual exposures were considered). Diving data from various sources were only partially compatible; some of the discrepancy may arise from an evolution of diagnostic criteria over several decades. Predictions were made of the outcome for additional reported diving series, and they were only partly successful. The models were then used to estimate decompression risk for current USN air diving with a finding of a wide range of hazard. Specifically, it appears that short dives are quite safe, even to a moderately deep depth, while long exposures are very risky regardless of depth. These findings will be used to produce a set of standard air tables with a uniform and low level of DCS risk. (Author).
Download or read book 1 3 ATA PO 2 in He Decompression Tables for MK 16 MOD 1 Diving Summary Report and Operational Guidance written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Navy Experimental Diving Unit (NEDU) was tasked by PMS-EOD to develop repetitive helium-oxygen (HeO2) decompression tables for use with the MK 16 MOD 1 Underwater Breathing Apparatus. Statistical and probabilistic decompression technology (LEM model) was used to generate profiles with depths, bottom times, and surface intervals of operational relevance to the fleet Explosive Ordnance Disposal (EOD) diver. These profiles were then man-tested 227 times, with one diagnosed case and one possible case of decompression sickness (DCS). These data were used to recalibrate the LEM model, which was then analytically mapped onto a deterministic model to allow the generation of repetitive decompression tables in U.S. Navy Diving Manual format with a predicted risk of DCS of 2.3%. Selected profiles from these tables were man-tested 299 times with 6 cases of DCS, yielding a 2.0% overall observed incidence of DCS in conformance with the intended risk. This report summarizes the work completed at NEDU during the development and testing of these tables, and forwards the tables with recommendations and guidance for their operational use. The tables are recommended for single no-decompression and decompression MK 16 MOD 1 HeO2 dives to depths from 40 to 300 fsw, and within certain limits, for repetitive MK 16 MOD 1 HeO2 diving in the 40 to 200 fsw range with surface intervals as short as 30 minutes. A more detailed description of this work will be released in a subsequent report or reports.
Download or read book Statistically Based Decompression Tables IV Extension to Air and N2 02 Saturation Decompression written by J. R. Hays and published by . This book was released on 1986 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent analyses have examined empirical, but statistically justifiable, models for standard air diving and used the results to develop air decompression schedule that are equal in risk. This analysis has been extended by examining air and N2-O2 saturation decompression. Some 279 exposures satisfied the rigid criteria for use as data. These exposures were analyzed alone and in combination with the earlier data by a number of gas exchange models. Several models with 2 or 3 gas exchange tissues were found to fit the data well. One of these models was chosen to produce optimum stage and continuous decompression schedules at a 1% chance of decompression sickness (DCS) for air, and for two constant PO2 mixtures at saturation depths down to 100 feet of seawater (fsw). For the same low predicted incidence of DCS, continuous decompression requires many fewer hours than needed for 10 or 5 foot staged decompression. Although the most powerful use of available data supports these schedules, they need testing to verify the actual incidence of DCS. Keywords: Mathematical model; Saturation diving; Likelihood estimation; Probability.
Download or read book The Dive Profiles and Manifestations of Decompression Sickness Cases After Air and Nitrogen Oxygen Dives Volume 1 Data Set Summaries Manifestation Descriptions and Key Files written by and published by . This book was released on 1999 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, decompression sickness (DCS) has been considered a binomial event. Throughout the development of decompression tables and mathematical models that predict DCS risk, investigators who have followed a data-based approach employed DCS as a "yes" or "no" event. Although DCS manifestations have been documented for decades, there has been no quantified effort to examine the relationship between the dive profile and the signs and symptoms of the disease itself. We have compiled the descriptions of DCS cases that occurred after prospective air or nitrogen-oxygen research dives conducted by the military. The detailed dive profiles associated with each case are also described. This comprehensive collection of more than 8000 exposures and more than 400 DCS cases will allow analysis of the relationship between the dive profile and manifestations of DCS.
Download or read book Environmental Engineering Dictionary and Directory written by Thomas M. Pankratz and published by CRC Press. This book was released on 2000-09-22 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like most technical disciplines, environmental science and engineering is becoming increasingly specialized. As industry professionals focus on specific environmental subjects they become less familiar with environmental problems and solutions outside their area of expertise. This situation is compounded by the fact that many environmental science
