Emergency care services implementing routine tourniquet use, especially in the civilian setting, should exercise caution and ensure that training is adequate for optimal results.
I suggest out of an abundance of caution that your friend ask an attorney to contact the third party's insurer's claims manager to negotiate a settlement.
Caution should be used and the patient should be monitored if they are taking the following: amiodarone, dronedarone, ranolazine, calcium channel blockers, niacin, digoxin, coumarin anticoagulants, and colchicine.