MonkSeal
Contributor
It's hard to believe that DSC can be developed after such dives.Blackwood:
36 hours for the first DCS symtoms? Also hard to believe or she didn't notice first signs.Blackwood:
Type II and 36 hours on-set? C'mon.Blackwood:
Blood Pressure and Inert Gas Loading
- Thread starter Blackwood
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OP
Blackwood
Contributor
MonkSeal:
I didn't believe it either. But who am I to contradict an MD, let alone a hyperbaric specialist? And further, who am I to contradict effective treatment?
Actually, she did notice the symptoms, but she disregarded them as something else because she felt DCS was so unlikely even after having been hit before.
OP
Blackwood
Contributor
fisherdvm:
haha... Yah. The hospital made a good amount of money on her chamber rides. Thanks DAN.
But really, the treatment worked, so as far as I'm concerned it was DCS or it was psychosomatic, and we'll never know which.
Dr Deco
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Hello Blackwood:
Blood Pressure and DCS
Pressure of a liquid per se will not affect the solubility of an inert gas [within physiological ranges]. Solubility is determined solely by the partial pressure of the inert gas [Henry's Law]; this is both on uptake and elimination.
Remember, also, that gas exchange in the lung capillaries is very rapid and generally not a rate-limiting step. Additionally, exchange at the tissue level is in the tissue capillaries and is also very rapid.
DCS
I would be curious to know what the DCS signs and symptoms were. Thirty-six hours post dive is a bit long for neurological DCS, but you do state that something was amiss before this.
The dives were relatively light on the dose of nitrogen – to say the least.
Hyperbaric Treatment
In general, a free gas phase does not persist that long [36 hours] after a dive, and thus there is nothing for the increased pressure to contract. Hyperbaric oxygen will generally be administered several times in a hope that it can alleviate problems arising from edema (= fluid loss into the tissues for the capillaries).
A very rapid reversal as you describe is surprising. As far as the DCS goes, we would need to know if the reversal was to signs ( = what others can see) or symptoms ( = what the individual feels). One can be subjective and the other objective. A feeling of tiredness is a symptom, and the loss of muscle strength is a sign and is measurable.
Dr Deco :doctor:
Blood Pressure and DCS
Pressure of a liquid per se will not affect the solubility of an inert gas [within physiological ranges]. Solubility is determined solely by the partial pressure of the inert gas [Henry's Law]; this is both on uptake and elimination.
Remember, also, that gas exchange in the lung capillaries is very rapid and generally not a rate-limiting step. Additionally, exchange at the tissue level is in the tissue capillaries and is also very rapid.
DCS
I would be curious to know what the DCS signs and symptoms were. Thirty-six hours post dive is a bit long for neurological DCS, but you do state that something was amiss before this.
The dives were relatively light on the dose of nitrogen – to say the least.
Hyperbaric Treatment
In general, a free gas phase does not persist that long [36 hours] after a dive, and thus there is nothing for the increased pressure to contract. Hyperbaric oxygen will generally be administered several times in a hope that it can alleviate problems arising from edema (= fluid loss into the tissues for the capillaries).
A very rapid reversal as you describe is surprising. As far as the DCS goes, we would need to know if the reversal was to signs ( = what others can see) or symptoms ( = what the individual feels). One can be subjective and the other objective. A feeling of tiredness is a symptom, and the loss of muscle strength is a sign and is measurable.
Dr Deco :doctor:
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