Unicompartmental Knee Replacement surgery is preformed under a spinal or general anesthesia. The surgery takes approximately two hours.
The patient is placed on their back and a tourniquet applied to the upper thigh. An incision, about 7cm, is made to expose the bones of the knee joint.
The damaged portions of the femur and tibia are then cut at the appropriate angles using specialised jigs. Test components are then inserted to check the accuracy of the cuts and determine the thickness of plastic required to place in between the two components.
Each knee is highly individual and will vary from patient to patient. To cater for this the knee replacement implants range in size and will be chosen and matched according to each individual patient. If there is more than the standard amount of bone loss extra pieces of metal or bone can be added.
The permanent components are then inserted and the knee is checked again to ensure everything is working properly. The knee is then carefully closed, drains inserted and the knee dressed and bandaged.