Unicompartmental knee replacement simply means that only a part of the knee joint is replaced through a smaller incision than would normally be used for a total knee replacement.
The benefits following surgery are relief of symptoms of arthritis. These include
Not quite as reliable as a total knee replacement in taking away all pain long term results not quite as good as total knee
Each knee is individual and knee replacements take this into account by having different sizes for your knee. If there is more than the usual amount of bone loss sometimes extra pieces of metal or bone are added.
Surgery is performed under sterile conditions in the operating room under spinal or general anaesthesia. You will be on your back and a tourniquet applied to your upper thigh to reduce blood loss. Surgery will take approximately two hours.
The Patient is positioned on the operating table and the leg prepped and draped.
A tourniquet is applied to the upper thigh and the leg is prepared for the surgery with a sterilizing solution.
An incision around 7 cm is made to expose the knee joint. Smaller incisions are made if the surgery is done using arthroscopy.
The bone ends of the femur and tibia are prepared using a saw or a burr.
Trial components are then inserted to make sure they fit properly.
The real components (Femoral & Tibial) are then put into place with or without cement.
The knee is then carefully closed and drains usually inserted, and the knee dressed and bandaged.
Once stable, you will be taken to the ward. The post-operative protocol is surgeon dependant, but in general your drain will come out at 24 hours and you will sit out of bed and start moving you knee and walking on it within a day or two of surgery. The dressing will be reduced usually on the 2nd post-op day to make movement easier. Your rehabilitation and mobilization will be supervised by a physical therapist.
Usually you will remain in the hospital for 3-5 days. Depending on your needs, you will then return home or proceed to a rehabilitation facility. You will need physical therapy on your knee following surgery.
You will be discharged on a walker or crutches and usually progress to a cane at six weeks. Your sutures are sometimes dissolvable but if not, are removed at approx 10 days.
Bending your knee is variable, but by 6 weeks it should bend to 90 degrees. The goal is to obtain 110-115 degrees of movement. You can drive at about 6 weeks, once you have regained control of your leg. You should be walking reasonably comfortably by 6 weeks. More physical activities, such as sports previously discussed may take 3 months to be able to do comfortably.
As with any major surgery, there are potential risks involved. Complications can be medical (general) or local complications specific to the Knee.
Medical complications include those of the anaesthetic and your general wellbeing.
Local Complications include:
Discuss your concerns thoroughly with your Orthopaedic Surgeon prior to surgery.
330 High Street
Ashburton, VIC 3147
Phone: (03) 9885 7773
Fax: (03) 9885 2123