I was taught this in the past also, but there is new thinking on this. You might find this thread interesting. The Dr. Meade in the thread is an ER physician who is also member of a SWAT team and a medical director for at least one EMS.CC Italian wrote: ... if a tourniquet is used you only have minutes before permanent nerve and muscle damage is done to your limb, or worst case scenario you lose a limb.
First-Aid-EMT-and-Tourniquets-Hemostatics