Why is using a tourniquet with wound to the femoral artery no useful?

A tourniquet is ineffective in controlling hemorrhage from a femoral artery injury. The femoral artery is a large artery that supplies blood to the thigh and lower leg. It is located deep within the thigh, and a tourniquet would not be able to compress it effectively. Additionally, applying a tourniquet to the thigh could cause serious damage to the nerves and blood vessels in the area, leading to potential loss of sensation and/or amputation.

Other methods, such as direct pressure or a pressure dressing, are more effective in controlling bleeding from a femoral artery injury.