Moderator: Tim White
cavedoc wrote:They don't cite any sources for their information. A quick electronic search of the medical literature doesn't come up with much either.
Ralph E. Powers wrote:Maybe, but I recall reading that the primary problem with HHS is that the blood becomes toxic due to lack of oxygen and once circulation is restored then the toxins in the blood that's pooled in the legs can shock the heart and cause an arrest.
Ralph E. Powers wrote:Maybe, but I recall reading that the primary problem with HHS is that the blood becomes toxic due to lack of oxygen and once circulation is restored then the toxins in the blood that's pooled in the legs can shock the heart and cause an arrest.
cob wrote: A tourniquet impedes the blood flow in and out, not just out. Perhaps as the blood again begins to flow after the removal of a tourniguet, it is only able to pick up so much toxins as it flows thru the muscles?
Roger, does this make any sense?
tom
Dwight wrote:There's a review of studies on harness suspension syndrome, written by Paul Seddon in England, that you can download at http://adventureguides.com.au/PDFs/HSE% ... Report.pdf.
Dwight wrote:cavedoc wrote:They don't cite any sources for their information. A quick electronic search of the medical literature doesn't come up with much either.
There's a review of studies on harness suspension syndrome, written by Paul Seddon in England, that you can download at http://adventureguides.com.au/PDFs/HSE% ... Report.pdf.
cavedoc wrote:I've heard this many times as well. What makes me question this is the practice of anesthesiologists during some surgeries. One technique done is to put a tourniquet on the leg and blow it up so that there is no blood flow. The surgeon does surgery on the leg and there is no bleeding. After 90-120 minutes, the tourniquet (basically a blood pressure cuff) is taken down and blood flow starts again.
fuzzy-hair-man wrote: A bunch of reasonable questions
fuzzy-hair-man wrote:I also take it the patient is unconsious, maybe this has implications for the amount of accumulation of blood toxins in the legs, as there is decreased muscle activity compared to a motionless consious patient?.
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The other thing I'd say is there is a differnce in the activity taken place before each of these events (a risk factor to HHS is exhaustion) so there is high blood flow to all areas of the body prior to the patient becoming motionless.
Contrasted with the hospital patient and they have probably been lying down for a while (if it was planned).
cob wrote:Roger, I wonder if their recomendation is coming out of experience, in that they have found that victims who are allowed to lay down are FAR more likely to have difficulties, than those who stay on their feet. It may not come from a controlled experiment, but if rescuers report that 70-80% of victims who lay down go into shock, while only 20% of those who walk do...
tom
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