|Tendon release is normally done under either regional or local anesthesia, and as either inpatient or outpatient procedures, depending upon the complexity of the surgery. Some surgeries may be performed arthroscopically, allowing a smaller incision while using a small camera (arthroscope) to guide the actions of the surgeon. Generally, an incision is made over the area of tendon attachment, the tendon tissue is cut away from the bone, allowing the tendon to relax or pull back towards the muscle belly. It may not be necessary to release the entire tendon to decrease tension on the muscle tendon unit. If the tendon is to be reattached (transposed) to another location, the incision is larger and the procedure more complicated. Very limited procedures, where the tendon is only lanced or pierced to relieve tension, may be done in a physician's office, under local anesthesia. The wound is closed and dressings applied. Extension splints may be used over joints to promote relaxation of the muscle tendon unit, increasing range of motion.|
Specific surgical techniques to release the tendons of hypertonic (spastic) muscles usually involve either an intramuscular lengthening, in which the tendon is released at the musculotendinous junction; "sliding lengthening," in which the tendon is released an exact amount with proximal and distal tendon incisions around a measured length of suture; or transposition of the muscle origin.
Source: Medical Disability Advisor