BuehlmannL16A: Decompression model ZH-L16A
Description
The parameters of the decompression model ZH-L16A
developed by Buehlmann.
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.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) |
Source
Buehlmann et al (2003), Table 25, page 158.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.
References
Buehlmann, A.B., Voellm, E.B. and Nussberger, P. (2002)
Tauchmedizin. 5th edition. Springer-Verlag, Berlin.
ISBN 3-540-42979-4.