skippy311
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Is DCS possible under 20fsw, or 100% impossible?
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Nitrox for shallow water artifact diving??
This is the study from which the quote was taken: https://www.researchgate.net/public...n_humans_DCS_risk_and_evidence_of_a_threshold
This is the study from which the quote was taken: https://www.researchgate.net/public...n_humans_DCS_risk_and_evidence_of_a_threshold
DCS - Decompression Sickness. Does this include burst lung (as it was in old money), or are we just talking about 'bends'?
Rapidly bolting to the surface from 20'/6m is pretty dangerous even though the likelihood of a "bend" through absorbed gases coming out of solution is highly unlikely (if within no-deco limits).
Rapidly bolting to the surface from 20'/6m is pretty dangerous even though the likelihood of a "bend" through absorbed gases coming out of solution is highly unlikely (if within no-deco limits).
In normal scuba-speak:
DCS (the topic of this thread) refers specifically to decompression sickness and is commonly called the bends.
DCI (not the topic of this thread) refers to Decompression illness, and is used to refer to both DCS and lung barotrauma, primarily because of the problem of distinguishing the symptoms of the two.
skippy311
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Good response!
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Exactly
Decompression illness (DCI) = Decompression sickness (DCS) + Arterial gas embolism (AGE)
Decompression illness results from a reduction in the ambient pressure surrounding a person’s body. It is commonly caused by pressure changes that occur in scuba diving, a very popular sport in many parts of the world. Decompression illness includes two conditions: decompression sickness and arterial gas embolism. Decompression sickness is thought to result from bubbles growing in the tissue and causing local damage. Arterial gas embolism results from bubbles entering the circulation, collecting together and travelling through the arteries and causing tissue damage by blocking blood flow to the small vessels.
As long as we are on the topic....
This is the key idea of the safety stop. It is safe for any saturated tissue to go to the surface from that depth. As diver ascends from greater depth, the tissues that have greater pressure than that are supersaturated and are losing nitrogen as they ascend. During a safety stop, any tissue that is too saturated to go to the surface should quickly drop to the safe pressure at that depth. Some slower tissues are still on-gassing nitrogen, but they cannot go beyond saturation at that depth, so they will always be safe to surface.
This is the key idea of the safety stop. It is safe for any saturated tissue to go to the surface from that depth. As diver ascends from greater depth, the tissues that have greater pressure than that are supersaturated and are losing nitrogen as they ascend. During a safety stop, any tissue that is too saturated to go to the surface should quickly drop to the safe pressure at that depth. Some slower tissues are still on-gassing nitrogen, but they cannot go beyond saturation at that depth, so they will always be safe to surface.
Of course, lung barotrauma can cause other injuries, including pneumothorax, mediastinal emphysema, and subcutaneous emphysema.Exactly
Decompression illness (DCI) = Decompression sickness (DCS) + Arterial gas embolism (AGE)
...
Arterial gas embolism results from bubbles entering the circulation, collecting together and travelling through the arteries and causing tissue damage by blocking blood flow to the small vessels.
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