BuehlmannL16A: Decompression model ZH-L16A

Description

The parameters of the decompression model ZH-L16A developed by Buehlmann.

Arguments

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: ll{ id compartment name (1, 1b, 2, ..., 16) halftime Nitrogen halftime (minutes) a parameter $a$ in ata (atmospheres absolute) b parameter $b$ (dimensionless) }

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.