Development of Decompression Procedures: Air Diving with Surface Decompression Using Oxygen.

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Development of Decompression Procedures: Air Diving with Surface Decompression Using Oxygen.

Show simple item record Lambertsen, CJ en_US Gernhardt ML en_US Miller, RG en_US Hopkin, E en_US 2015-12-21T05:30:11Z 2015-12-21T05:30:11Z 1992 en_US
dc.identifier.citation Lambertsen, C.J. Gernhardt, M.L., Miller, R.G., and E. Hopkin. Development of Decompression Procedures: Air Diving with Surface Decompression Using Oxygen. Based upon Integrated Analytic Models of Tissure Gas Bubble Dynamics and Oxygen Tolerance (Collaborative Program) en_US
dc.identifier.other Report Number 07-28-1992 en_US
dc.description The items forming the Rubicon Research Repository Christian J. Lambertsen collection are generously donated by the Lambertsen Family. All items in this collection are released through Creative Commons Attribution + Noncommercial + ShareAlike (BY-NC-SA) licenses in an attempt to encourage the use of these works to further scientific understanding of physiology. en_US
dc.description.abstract This report concerns a current U.K. Health and Safety Executive (HSE) Program aimed at providing safer operational Air Sur DO2 decompression tables for a wide range of diving exposures. Need for the Program was generated by a Department of Energy (DEn) study of the incidence of decompression sickness (DCS) in the U.K. North Sea Sector from 1982 to 1986, which indicated low overall DCS incidence, but increasing incidence with longer duration diving. Restrictions of diving durations improved safety, but limited operational flexibility. In recognition of the problems of nonuniform safety association with existing decompression tables, the HSE commissioned a study to produce new tables with the aim of enhanced safety throughout the operational range. It was necessary to provide a technologic basis for safety, and to reduce long term dependence upon general restriction which handicap further developments of diving capability. The present Program comprises five sequential Project Phases encompassing exploration of risk in existing operational analytic model against laboratory data, improved decompression procedures development, performance of laboratory trials, and initiation of operational trials of new tables. The Report summarizes the results obtained in Phases I, II, and III of extensive analyses of decompression procedures to relate incidence of decompression sickness symptoms to the magnitudes of major stress indices in operational and research Air Sur DO2 diving/decompression procedures. The Analytic System evaluations in Phases I and II were performed in conjunction with the Environmental Biomedical Research Data Center. Its "Integrated System for Diving Decompression Analysis" encompassed models of tissue gas exchange, tissue gas bubble dynamics, and oxygen tolerance, together with a Data Base of approximately 6,500 man laboratory trials with 450 instances of documented decompression sickness. The evaluations of stress indices established conclusively that the quantitatable diving decompression stress index best predicts the likelihood of decompression sickness symptoms occurence. In Phase III of the Program the Decompression Stress Analysis System was used to produce a complete Table of Air Sur DO2 diving schedules. The critical features of the new tables development were the predictive modeling of bubble growth designed to maintain control of nucleated gas phase to levels which were found unlikely to produce decompression sickness, and effective use of oxygen to accelerate gas phase resolution. The present aim of the Program is for the new tables to be progressively verified by a series of laboratory trials with the ultimate goal of attaining approval and acceptance for use in offshore work. The validation of the decompression stress analysis model applied in the Program to design of Air Sur DO2 diving schedule makes the model system and related data bases useful for design of any form of decompression, and to assess the potential safety of existing decompression schedules. en_US
dc.language.iso en en_US
dc.publisher Lambertsen en_US
dc.subject Integrated System for Diving Decompression en_US
dc.subject dive procedures and tables en_US
dc.subject decompression stress analysis model en_US
dc.subject decompression schedules en_US
dc.subject gas phase growth en_US
dc.subject prediction model en_US
dc.subject validation en_US
dc.subject tissue gas bubble dynamics en_US
dc.subject oxygen tolerance en_US
dc.title Development of Decompression Procedures: Air Diving with Surface Decompression Using Oxygen. en_US
dc.type Article en_US

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