Daydream believer
Well-known member
Suspension Trauma occurs with all harness types that allow a human to hang vertically, the medical term is venus pooling. When a person is suspended and the legs are hanging freely, gravity makes it very difficult for the heart to pump the blood back up. Eventually the hanging person loses consciousness and they could die. Apparently we need to be pressing our feet against the ground or lying down to prevent venus pooling and some are more susceptible than others. I have to manage this risk on my drilling rigs and have rescue plans for all work at height. Of course we try an eliminate harness work. HSE eh, just gets in the road.
In my training I was told that following a fall into a fall arrest harness the casualty has about 15-20 mins before becoming unconscious, so one has to get the person down really fast. That is why one needs a robust rescue plan
I seem to recall that one has to release pressure on the harness very slowly to prevent a rush of blood & possible heart attack, although this line of thought may have changed over the years.
I think the same applies to man overboard harnesses when persons are lifted on board after a fall.
Do you know if the casualty has to lay down immediately or has to be maintained in a sitting position ( assuming conscious) for a while?