| Graphical Analysis: Decompression Tables and Dive-Outcome Data |
DEC 2004 |
34 pages |
| Authors:
H. D. Van Liew; E. T. Flynn; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
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 | We use a graphical approach to compare prescriptions for ascent given by various air decompression tables with outcomes of experimental dives compiled in the U.S. Navy' Decompression Database. For a given dive depth, we plot times at decompression stops plus time to travel from depth to the surface (TDT) on the Y-axis end bottom time on the X-axis. The analysis dramatizes the large differences among alternative decompression instructions: tables from ... |
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| A Simple Probabilistic Model for Estimating the Risk of Standard Air Dives |
DEC 2004 |
49 pages |
| Authors:
H. D. Van Liew; E. T. Flynn; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| Statistical fitting of an algorithm to "calibration data" gives parameter values for a "probabilistic decompression model." Some previous probabilistic models prescribe long times at decompression stops for standard air dives. Here we present a simple model, based on premises different from those used previously, to test whether long decompression times are necessary and to enable risk of decompression sickness (UCS) to be estimated in air dives. Using logistic regression, we ... |
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| No-Stop 60 FSW Wet and Dry Dives Using Air, Heliox, and Oxygen-Nitrogen Mixtures. Data Report on Projects 88-06 and 88-06A: Improved Decompression Procedures for Free-Swimming Divers |
11 JUL 2002 |
77 pages |
| Authors:
R. W. Hamilton; E. D. Thalmann; E. T. Flynn; D. Temple; HAMILTON RESEARCH LTD TARRYTOWN NY
|
| The purpose of this report is to provide access to experimental laboratory data involving human decompression exposure that have not been published and thus are not presently available for analysis by Navy and other researchers. As such, this is only a report of the date, not a write-up of the experiment. This project was designed to evaluate the decompression sickness risk in no-decompression dives breathing air, heliox, and nitrox mixtures. ... |
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| Six-Hour No-Decompression Diving With 40% Oxygen/60% Helium |
JUN 1999 |
29 pages |
| Authors:
D. J. Smith; E. T. Flynn; NAVAL MEDICAL RESEARCH CENTER BETHESDA MD
|
| U.S. Navy Special Warfare divers frequently perform long-duration, multilevel dives while breathing air, 100% oxygen, or nitrogen-oxygen mixtures in varying combinations. Dive depths range from 0-100 feet seawater (fsw) and dive durations may extend up to 6 h or more. Present decompression procedures mandate lengthy decompressions that in many cases impede mission accomplishment. This study explored the potential use of a hyperoxic helium-oxygen breathing mixture to reduce or eliminate in-water ... |
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| Tracheal Pressure and Impedance as Determinants of Gas Exchange During High Frequency Ventilation |
1987 |
17 pages |
| Authors:
J. R. Clarke; L. D. Homer; E. T. Flynn; M. E. Bradley; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| This work explores the use of catheter transducers to measure time averaged, mean squared pressure (MSP) in the trachea of anesthetized animals during high frequency ventilation using a prototype Emerson oscillator with a 25 ml stroke volume at 15 and 34 Hz. Tidal volume and MSP were varied by shunting a portion of the ventilator output for the study of the effect of driving pressure on ventilation. A given level ... |
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| Operational Monitoring of Oxygen Consumption in Semi-Closed Circuit Underwater Breathing Apparatus |
1974 |
13 pages |
| Authors:
E. T. Flynn; NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
|
| An equation is developed which permits calculation of a diver's oxygen consumption in a semi-closed circuit UBA if the inspired partial pressure of oxygen, the depth, the mixed gas injection rate and the supply gas oxygen percentage are known. The approximate nature of this calculation and its limitations are discussed. |
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| Case of Mumps During Hyperbaric Exposure |
1971 |
4 pages |
| Authors:
R. E. Danziger; T. L. Sallee; D. E. Uddin; E. T. Flynn; J. M. Alexander; NAVAL MEDICAL RESEARCH INST BETHESDA MD
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| Mumps virus infection without parotitis was observed in one member of a four-man U.S. Navy diving team during a 15-day 600-foot chamber dive. As part of a biomedical program, blood samples were obtained periodically throughout the dive. This report details the clinical course of the disease, the biochemical changes that occurred, and the serum viral titer studies. There were no apparent differences between mumps in the hyperbaric environment and mumps ... |
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