The diving medical detectives: when diving medicine books are completely wrong; Part VI

Abstract

The diving medical detectives: when diving medicine books
are completely wrong. Here in Part VI of this series we give only a short
comment on the 5th. edition of Bennett & Elliot‘s Physiology and Medicine of Diving,
concerning two errors on p. 440.

Full text

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The diving medical detectives:
when diving medicine books
are completely wrong
01.04.2024, Part VI:
Bennett‘s & Elliot‘s „Bible“, p. 440
Miri Rosenblat, TAU
Nurit Vered, Technion Haifa
Albi Salm, SubMarineConsulting
DOI:

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The diving medical detectives:
when diving medicine books
are completely wrong, Part VI:
Abstract & Methods: the same, as per Parts I to V of this series.
Part I, Ref. [1], DOI: 10.13140/RG.2.2.15199.79528
Part II, Ref. [2], DOI: 10.13140/RG.2.2.35722.39366
Part III, Ref. [3], DOI: 10.13140/RG.2.2.28043.62245
Part IV, Ref. [4], DOI: 10.13140/RG.2.2.12077.97760
Part V, Ref. [5]; DOI: 10.13140/RG.2.2.31827.45600
If you want to contribute s.th. to our list, we would be very happy if you send
an e-mail to our head of lab: director@smc-de.com
(That is: to be continued in 2025 with Part VII ☺ )

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Here, in Part VI, we give only a short comment on
Table 10.1.1 on p. 440 of [63], Bennett‘s & Elliot‘s „Bible“, i.e.:
the 5th. edition of “Physiology and Medicine of Diving”,
ed.: Brubakk, Neuman et al.:
The yellow display is ours: the original values published by Bob (copies, pls.
cf. slides # 4 & 5) are different! For 160 min N2it is 1.15;
for 200 min He it is 1.0.

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N2 on p. 31:

5
Helium on p. 32:

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Now, concerning the M0 values as
such, converted to msw:
but by using the
USN conversion factors for:
MSW (Meter of Sea Water) @ 4 ° C
(the pressure equivalent of
10 MSW = 1 Bar per definition);
or mfw (meter of fresh water) @ 15 ° C
(pls. cf., again & again, slide # 9),
the converted M0 values should look
like that:

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As well there is a pressure conversion table
in the Appendix on p. 760.
This one yields for e.g.:
Line 3: 10.06 / 33 = 0.304848
Line 8: 35.22 / 115.5 = 0.304935
Line 16: 100.62 / 330 = 0.304909
Line 26: 201.24 / 660 = i.b.d.
It seems that neither of them were really used in the creation of 10.1.1

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We do not want to insinuate that these deviations are
of any relevance to real-world,
practical diving: they are NOT!
Especially when considering the measurement-errors
of real-world diving equipment: pressure-/depth gauges
and dive-computers piezo-electronic systems
usually are to a precision of ca. 3 to 5 %, but only
if properly temperature-drift compensated.
But for serious scientific calculation of a dive table, the decompression
schedule for a SAT-dive or for the assessment of an internal calculation of a
dive computer: they ARE!

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The mother of all diving manuals world-wide,
the United States Navy Diving Manual, with the very wise
remark, that 10 m is not 10 msw and: 10 feet is not 10 fsw!
On p. 2-33 of Ref. [15 e]
US DIVING MANUAL_REV7_ChangeA-6.6.18 ,
Free download @: https://www.divetable.eu/15.pdf

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References (0):
We from the lab (Miri, Nurit & Yael) rely heavily on the
knowledge & experience of our boss:
https://www.researchgate.net/profile/Albi-Salm-2
As well we have our big library at hand:
https://www.divetable.eu/BOOKS/index_e.htm
יבלא:
הבר הדות!
ירימ ,לעיו תירונ
[15 e] US DIVING MANUAL_REV7_ChangeA-6.6.18
[63] "Bennett and Elliott's Physiology and Medicine of Diving“,
ed.: Alf Brubakk, Neuman et al., 5 th Ed. Saunders, ISBN 0-7020-2571-2

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References (1):
„The diving medical detectives-series on ResearchGate:
when diving medicine books are completely wrong!”
Parts # 1 to 5:
[1] Rosenblat, Miri & Vered, Nurit & Eisenstein, Yael & Salm, Albi. (2021).
The diving medical detectives: when diving medicine books are completely
wrong 09.09.2021, Part I. 10.13140/RG.2.2.15199.79528.
[2] Salm, Albi & Rosenblat, Miri & Vered, Nurit & Eisenstein, Yael. (2021).
The diving medical detectives: when diving medicine books are completely
wrong, Part II. 10.13140/RG.2.2.35722.39366.
[3] Rosenblat, Miri & Vered, Nurit & Eisenstein, Yael. (2021). Errors part III.
10.13140/RG.2.2.28043.62245.
[4] Rosenblat, Miri & Vered, Nurit. (2022). The diving medical detectives:
when diving medicine books are completely wrong; Part IV: Synopsis.
10.13140/RG.2.2.12077.97760.
[5] Rosenblat, Miri & Vered, Nurit & Salm, Albi. (2023). Errors partV.
10.13140/RG.2.2.31827.45600.