| BuehlmannL16A {scuba} | R Documentation |
Decompression model ZH-L16A
Description
The parameters of the decompression model ZH-L16A developed by Buehlmann.
Format
A data frame giving the following parameters for each compartment:
id | compartment name (1, 1b, 2, ..., 16) |
halftime | Nitrogen halftime (minutes) |
a | parameter a in ata (atmospheres absolute) |
b | parameter b (dimensionless)
|
Details
This dataset contains the tissue parameters of the decompression model ZH-L16A.
Buehlmann's decompression model ZH-L16A is a pure
diffusion (Haldane-type) model consisting of 17 tissue compartments.
Nitrogen in the breathing gas diffuses in and out of each compartment
at a rate governed by the halftime for that compartment.
The maximum tolerable nitrogen tension in a compartment,
when the ambient pressure is P atmospheres absolute,
is
P_{\mbox{tol}} = a + \frac{P}{b}
where a and b are values intrinsic to the tissue.
Thus, for a no-decompression dive at sea level, the nitrogen tension
in each compartment must not exceed the value a + 1/b for
that compartment.
The dataset BuehlmannL16A is a table giving the values of
a and b for each of the 17 tissue compartments.
Decompression calculations
The dataset BuehlmannL16A is just a table of numbers.
It cannot be used directly for decompression calculations,
because the scuba package does not recognise it
as a decompression model (object of class "hm").
To perform decompression calculations with the ZH-L16A model,
use the functions haldane or showstates
with the argument model="ZH-L16A" (or just model="Z").
To convert a table of
a and b values, such as the table above,
into an object of class "hm" representing a decompression model,
first calculate the M-values M0 = a + 1/b and dM = 1/b,
and then pass the values M0, dM to the function
hm.
Author(s)
Adrian Baddeley Adrian.Baddeley@curtin.edu.au.
Source
Buehlmann et al (2003), Table 25, page 158.
References
Buehlmann, A.B., Voellm, E.B. and Nussberger, P. (2002) Tauchmedizin. 5th edition. Springer-Verlag, Berlin. ISBN 3-540-42979-4.