Hello Readers:
DCS Case
When I read this, it appears that a DCS incident did occur, since it responded to recompression. That is not proof positive, since oxygen will also held some problems independently of pressure.
This is probably a case of arterialization of venous gas bubbles. A period of time, post depress, is required for bubbles to appear and accumulate in the venous return (vena cava). The conditions for arterialization are therefore better after a period of time such as ½ hour. It is possible that there was simply a lung bubble overload, and arterialization occurred though the pulmonary vasculature (blood vessels).
It is also possible that some condition helped to force the bubbles through the lungs, or helped to arterialize through a PFO. This could have been a Valsalva maneuver or the equivalent. Valsalva-like maneuvers are coughing, sneezing, holding your breath while you strain to do something (e.g., lifting something). :06:
DECO Meters
I seriously doubt that this would have been prevented by any meter or table on the market. This appears to be one of those unfortunate deco situations. If it was an arterialization problem, the question might be, why there were many venous bubbles? (Although it does not require a lot, only that some bubbles be present).
Possible there was a lot of gas uptake (swimming on the bottom a great deal) or there was excessive activity reboarding the boat inducing bubble formation.
Dr Deco :doctor:
