What major complication can arise from applying a tourniquet improperly?

Applying a tourniquet improperly can lead to loss of limb function because improper application may restrict blood flow not only to the injured area but to adjacent tissues as well. If the tourniquet is too tight or left on too long, it can result in ischemia, which deprives the tissues of oxygen and nutrients. This can cause damage to nerves and muscles, potentially leading to permanent impairment of function in the limb.

While complications such as infection, excessive blood loss, or skin necrosis can be associated with the use of tourniquets in general, the direct consequence of improper application specifically pertains to the loss of function in the limb. When a tourniquet is used correctly, it is intended to control bleeding and protect the limb; however, mismanagement can inadvertently result in significant and lasting damage to the limb's ability to function normally.