Medical bulletin‎ > ‎

Minimally Invasive surgery - Knee Joint replacement

posted Jan 27, 2013, 8:41 AM by HP Orthocare hospital   [ updated Feb 12, 2013, 1:41 AM ]
Minimally Invasive surgery (MIS) Knee Joint Replacement is considered a step forward in total knee replacement for a
number of reasons: a shorter hospital stay, faster recovery, and much less scarring.

The MIS Knee Joint Replacement procedure is an advancement in total knee replacement that offers important advantages over the standard surgical procedure. The Stryker MIS Knee Joint Replacement technique brings together high quality knee implants, new minimally invasive surgical techniques, and new instrumentation.

Less is more

Unlike conventional total knee replacement-which requires a large incision (8 to 12 inches) and significant disruption of the muscles and tendons-MIS Knee Joint Replacement is performed through an incision as small as 3 to 4 inches. In some MIS procedures the amount of soft tissue (muscles and tendons, etc.) that are disrupted during surgery may also be reduced. Through that same small incision, the diseased surfaces of the knee joint are exposed and then replaced, one at a time, with the artificial joint components.

Minimally invasive surgery

Over the past 25 years, minimally invasive surgery has revolutionized many fields of medicine. Its key characteristic is that it uses specialized techniques and instrumentation that enable the physician to perform major surgery without a large incision. In this respect, MIS Knee Joint Replacement is indeed "minimally invasive," requiring only a small incision and causing minimal trauma to the soft-tissues. Minimally invasive surgical techniques may offer benefits including: less pain, less recovery time, and less scarring.

Listing the advantages

Because fewer muscles and tendons are disturbed with MIS Knee Joint Replacement, their reconstruction is more natural, wound closure is easier, and recovery may be faster(1). Clinical studies have shown that the midvastus surgical approach used in the MIS technique results in less pain (at both 8 days and 6 weeks after surgery) and quicker restoration of muscle control and strength(2). It can take several months to recover from the large incision and muscle disruption with the standard approach.

1. White R, Allman J, Trauger J, Dales, B. Clinical Comparison of the Midvastus and Medial Parapatellar Surgical Approaches. Clinical Orthopaedics & Related Research. 1999; 367: 117-122.
2. Tria AJ. Minimal Incision Total Knee Arthroplasty. Clinical Orthopaedics & Related Research. 2003; 416: 185-190.