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PFO
PO
2
RGBM
Reduced Gradient Bubble Model
Repetitive dive
Residual nitrogen
SURF TIME
Surface interval time
Tissue group
UHMS
Whole-body toxicity
Abbreviation for patent foramen ovale. It is a form of congenital heart
defect that enables blood flow between the left and right atria via the in-
teratrial septum.
Abbreviation for oxygen partial pressure.
Abbreviation for Reduced Gradient Bubble Model.
Modern algorithm for tracking both dissolved and free gas in divers.
Any dive whose decompression time limits are affected by residual nitro-
gen absorbed during previous dives.
The amount of excess nitrogen remaining in a diver after one or more
dives.
Abbreviation for surface interval time.
Elapsed time between surfacing from a dive and beginning a descent for
the subsequent repetitive dive.
Theoretical concept used to model bodily tissues for the construction of
decompression tables or calculations.
Abbreviation for Undersea and Hyperbaric Medical Society.
Another form of oxygen toxicity, which is caused by prolonged exposure
to high oxygen partial pressures. The most common symptoms are irrita-
tion in the lungs, a burning sensation in the chest, coughing and reduction
of the vital capacity. Also called Pulmonary Oxygen Toxicity. See also
OTU.
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