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Synopsis: some collateral aspects of DCS

  • March 2021
DOI:10.13140/RG.2.2.22131.66087
Authors:
Miri Rosenblat at Tel Aviv University
Miri Rosenblat
Nurit Vered at Technion - Israel Institute of Technology
Nurit Vered
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Abstract

Synopsis: some collateral aspects of DCS A collection of papers / essays / presentations and their URLs at researchgate.net, related to DCS (decompression sickness), PBPK (physiologically based pharmaco-kinetic models), diving and their somewhat remote, unusal or at least, unorthodox aspects.
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1
Synopsis:
some collateral aspects of DCS
•A collection of papers / essays / presentations
•and their URLs at researchgate.net,
•related to DCS (decompression sickness), PBPK
(physiologically based pharmaco-kinetic models), diving
•and their somewhat remote, unusal or at least,
•unorthodox aspects
•DOI: http://dx.doi.org/10.13140/RG.2.2.: t.b.d
2
Topic Ref.
Cusp Catastrophe Hypothetical relation between DCS and
cuspoid (non-linear) catastrophe functions [1]
Dive Tables Historical developments and various
approaches to tabulate dcs-free dives [10]
Super-fast
Compartments Theoretical loci of very fast inertgas
absorption and high perfusion rates [11]
Haldane & „2:1“ One of the first PBPK used to tabulate
dcs-free air-dives for surface-supplied hard
hat/helmet divers
[12]
Gradientfactors On the numerical evaluation of calculating
stop-times for trimix dives and the use of a
linear scaling to hide implementation
weaknesses in commercial off-the-shelf
desktop decompression-software.
[13]
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Topic DOI Ref.
Heliox Jump Dive 10.13140/RG.2.2.24608.20482/1 [2]
MT92 comparison 10.13140/RG.2.2.34271.38567 [3]
DCIEM, USN comparison 10.13140/RG.2.2.28277.40169 [4]
DGUV40 comparison 10.13140/RG.2.2.10079.28324 [5]
Yo-Yo / fish farming 10.13140/RG.2.2.15432.75522 [6]
P(DCS) models compared 10.13140/RG.2.2.17249.74084 [7]
SAA „deep stop“ table 10.13140/RG.2.2.24738.04800 [8]
Comparison with COMEX 10.13140/RG.2.2.10536.39685 [9]
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References (1):
[1] Salm, Albi (2020) Is DCS a “cusp” catastrophe?
https://www.researchgate.net/publication/342134960_Is_DCS_a_CUSP_ca
tastrophe
[2] Salm, Albi (2020) ZH-L 12 : Validation of an old (1982) experimental
Heliox jump dive (30 m, 120 min)
DOI: 10.13140/RG.2.2.24608.20482/1
[3] Salm, Albi (2021) The mapping of a french air diving table (MT92)
to a standard Haldane- / Workman- /Schreiner-algorithm
DOI: 10.13140/RG.2.2.34271.38567
[4] Salm, Albi (2020) Comparison of the air-diving tables ZH-86 and DCIEM
with DGUV40 & DIVE V 3_09
DOI: 10.13140/RG.2.2.28277.40169
[5] Salm, Albi (2020) Is the DGUV40 adequate for underwater-"work"?
DOI: 10.13140/RG.2.2.10079.28324
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References (2):
[6] Salm, Albi (2020) On the theoretical evaluation of one yo-yo diving profile
on air for fish-farming
DOI: 10.13140/RG.2.2.15432.75522
[7] Salm, Albi (2020) On the statistical probability of contracting a
decompression sickness after a single scuba dive on air within a no-
decompression-limit
DOI: 10.13140/RG.2.2.17249.74084
[8] Salm, Albi (2020) A „deep stop“ table for recreational dives on air:
Debunked!
DOI: 10.13140/RG.2.2.24738.04800
[9] Salm, Albi (2020) Adaption of a COMEX procedure for recreational bounce
dives on air
DOI: 10.13140/RG.2.2.10536.39685
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References (3):
[10] Salm, Albi (2020) Historical Dive Tables / historische Tauchtabellen
DOI: 10.13140/RG.2.2.32813.03042
[11] Salm, Albi (2018) Essay on fast & super-fast compartments
DOI: 10.13140/RG.2.2.30451.35366
[12] Salm, Albi (2016) Did Haldane really use his "2:1"?
DOI: 10.13140/RG.2.2.21318.91209
[13] Salm, Albi (2012) Decompression-Calculations for Trimix Dives with PC-
Software; Gradient Factors: do they repair defective algorithms or do they
repair defective implementations?
DOI: 10.13140/RG.2.2.35405.87527
ResearchGate has not been able to resolve any citations for this publication.
The mapping of a french air diving table (MT92) to a standard Haldane- / Workman- / Schreiner-algorithm
Presentation
Full-text available
  • Feb 2021
Abstract: The published french air diving tables MT92 ([1] & [2]) could be mapped via a simple algebraic transformation directly to a standard decompression algorithm based on blood perfusion with a linear relationship between calculated compartment inert gas overpressures and the ambient pressure. With this mapping the MT92 table entries could be calculated with any desktop decompression software and thus compared to other published air diving tables like DCIEM, USN & NDTT [5]. As well the MT92 framework could be extended to other than printed: or greater bottom depths or longer bottom times higher pO2 during decompression modified decompression stages if operational requirements need an adaption of the published tables.
On the theoretical evaluation of one yo-yo diving profile on air for fish-farming
Presentation
Full-text available
  • Jan 2021
On the theoretical evaluation of one yo-yo diving profile on air for fish-farming Abstract: A yo-yo diving profile is one with very rapid and repeated depth changes. Due to the speed of depth changes in excess of 20 m/min and the quickly repeated ascents and descents within 1 to 5 min, a standard decompression model based on perfusion or a dive computer or a logging device can no longer track the changes in the inertgasload in the diver’s body properly. One form of ubiquitious yo-yo diving is done in fish-farming, clearly needed to change air-tanks, tools, debris and locations within a multiple array of the fish-nets. The already available historic sources ([1], [2], [4], [5] & [6]) address this topic clearly and the connected risks but without hints of complete mitigation. We propose simple & straightforward modifications of an existing perfusion model [12] to mitigate the risk of decompression sickness and/or arterial/ cerebral air embolism.
On the statistical probability of contracting a decompression sickness after a single scuba dive on air within a no-decompression-limit
Presentation
Full-text available
  • Dec 2020
On the statistical probability of contracting a decompression sickness after a single scuba dive on air within a no-decompression-limit The P(DCS) is the statistical probability of contracting a decompression sickness, the NDL are the so-called „No Decompression Limits“, the time limits for dives where a direct ascent to the surface is still possible, i.e. without decompression stops. Since there is variance in these NDLs from different agencies, we set out to analyze them with already published methods of assessing the P(DCS). Thus the somewhat lengthy title could have been condensed to: On the P(DCS) from a single air dive within NDL The NDL from some recreational air dives from various training agencies are contrasted and analyzed with 3 published methods from the USN NEDU [1], [2] & [4].
Adaption of a COMEX procedure for recreational bounce dives on air
Presentation
Full-text available
  • Dec 2020
Adaption of a COMEX procedure for recreational bounce dives on air: a COMEX decompression procedure, once developped for deep experimental and saturation dives with Heliox is adapted for the use in the deep diving range for recreational & technical bounce dives on regular breathing air. As well a comparison is done between different staging protocols and decompression procedures, for. eg. from the United States Navy and the Buehlmann SAT tables.
A „deep stop“ table for recreational dives on air: Debunked!
Presentation
Full-text available
  • Dec 2020
A „deep stop“ table for recreational dives on air: Debunked! A "deep stop" table is challenged with 2 box-profiles: the authors claims of reduced decompression stress and additional safety due to deep stops are analyzed. An in-depth analysis of the calculated inertgas partial pressures in theoretical tissue compartments reveals that the additional safety and micro-bubble control can not be substantiated seriously. The manually inserted deep stops are following basically the DAN rule, thus the safety record of the original Bühlmann ZH-86 table is not substantially improved.
Ist die DGUV Vorschrift 40 angepaßt für Taucher-“Arbeit“?
Presentation
Full-text available
  • Nov 2020
Ist die DGUV Vorschrift 40 angepaßt für Taucher-“Arbeit“? Die DGUV 40 wird anhand eines exemplarischen Box-Profiles geprüft, inwieweit die körperliche Belastung unter Wasser berücksichtigt ist. Aus den Abweichungen zu bewährten / implementierten Standardmethoden läßt sich zeigen, daß dies nicht der Fall ist. Für anstrengendere Taucher-Arbeiten wird empfohlen, die DGUV 40 nicht zu benutzen oder zusätzliche Vorsichtsmaßnahmen, z.B. „padding“ dieser Tabelle.
Vergleich der Pressluft-Tabellen ZH-86 und DGUV Vorschrift 40 mit DCIEM und DIVE Version 3_09 anhand exemplarischer Box-Profile
Presentation
Full-text available
  • Nov 2020
Vergleich der Pressluft-Tabellen ZH-86 und DGUV Vorschrift 40 mit DCIEM und DIVE Version 3_09 anhand exemplarischer Box-Profile Zusammenfassung: DGUV folgt präzise ZH-86 innerhalb der „schützenden Einhüllenden“(< 30 m, < 30 min). Marginale Abweichungen +/- 1 min zu ZH-86 bzw. DIVE Version 3_09 rühren u.a. von den unterschiedlichen Aufstiegsgeschwindigkeiten her. Außerhalb dieser Bereiche führt die im anglo-amerikanischen Sprachraum als „executive editing“ bekannte Methode i.d.R zu negativen Abweichungen, d.h. zu verkürzten Stopp-Zeiten auf Grund einer modulo 5 Struktur. Methode: Vergleich der Box- (Kastenprofile) der Tabellen in den Dimensionen: Stopp-Zeiten pro Stopp und TTS (TTS = time-to-surface, i.e.: Summe aller Stopp-Zeiten + Maximale Tiefe / Aufstiegsgeschwindigkeit)
ZH-L 12 : Validation of an old (1982) experimental Heliox jump dive (30 m, 120 min)
Presentation
Full-text available
  • Oct 2020
ZH-L12: Validation of an old (1982) experimental Heliox jump dive (30 m, 120 min): Question: could we verify the old ZH-L12 decompression profile with a topical desktop deco software?
Historical Divetables / historische Tauchtabellen
Presentation
Full-text available
  • Apr 2020
"Historical Divetables" gives an overview of ca. 110 years of dive tables development, tests and the results: the printed tables. There are copies & extracts of 24 tables and 2 procedures. "Historische Tauchtabellen" gibt einen Überblick über ca. 110 Jahre Entwicklung, Test und die Ergebnisse, die gedruckten Tabellen. Es gibt 24 Tabellen, komplett oder als Auszug sowie 2 historische Prozeduren.
Essay on fast and super-fast compartments
Preprint
Full-text available
  • Jan 2018
Essay on Fast and Superfast Compartments