The parameters of the decompression model ZH-L16A developed by Buehlmann.
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.
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) |
Adrian Baddeley Adrian.Baddeley@curtin.edu.au.
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.
Buehlmann, A.B., Voellm, E.B. and Nussberger, P. (2002) Tauchmedizin. 5th edition. Springer-Verlag, Berlin. ISBN 3-540-42979-4.
Workman65