Below the elbow amputations remove the forearm while preserving the elbow joint. Prosthetics can be customized for lifestyle. Elbow and above elbow amputations are performed for conditions like peripheral vascular disease from diabetes or blood clots. Major amputations include below knee and above knee while partial foot amputations include Chopart, Lisfranc and ray procedures. Conservation of residual limb length is a principle of modern amputation surgery. Causes include poor blood flow, infection, trauma, tumors or birth defects. Complications can include bleeding, anesthesia issues, infection, blood clots and poor healing but are rare.