Compartments

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fotta

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Is someone able to explain what the dive computer manufacturers are referring to with the term "compartments" when describing the decompression models they use?
 
Most computers use about 9 tissue comparments some use up to 12

Due to the fact that various tissues groups such as fat, muscle, bone, blood, saturate and desaturate with gas at variable rates, tissue "compartments" are measured with Theoretical nominal half time periods.

The "half-life" characterizes the absorption and outgassing of the various tissue compartments. This calculation takes into account dissolved as well as gaseous nitrogen formation in the venous and arterial blood supply and tissue groups relative to ascent rate, decompression, etc.

Some computers are more conservative than others depending on the model used for offgassing of the various compartments

Hope that makes sense of it for you
 
are not real. They are merely mathematical concepts used to model the way various tissues might absord intert gas.

And the addition of the word *tissue* is confusing because folks think that there is a real correspondence between the mathematical "compartment" and an actual tissue of the body. There isn't.

That does not mean that the modelling of gas absorption in the different tissues of the body by using theoretical *compartments* is invalid... it is just that the two should not be confused.

One is real... the other is not.
 
Sydney_Diver once bubbled...
Pug you are right should have made that a little clearer
I think that between us and with the links provided by NCD we covered it pretty good :D
 
https://www.shearwater.com/products/swift/

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