Wounds due to shearing forces
Shear force or a force created when the skin of a patient stays in one place as the deep fascia and skeletal muscle slide down with gravity. This can also cause the pinching off of blood vessels which may lead to ischemia and tissue necrosis. Bedridden patients and wheelchair users in half-sitting position are very vulnerable for shear wounds.
Friction wounds are frequently seen among persons having spasms or persons with involuntary movements. Also people using prosthesis or wheelchairs often have friction lesions.