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Meniscus Tear

Meniscus Tear

Alternate Names

  • cartilage tear
  • trick knee
  • locked knee


The meniscus is the name for either of two pieces of tough cartilage inside the knee joint. They are shaped like half moons and are sometimes called semilunar cartilage. One is on the medial side (inside) and one is on the lateral side (outside). They act as cushions between the femur, or the thigh bone, and the tibia, which is the major bone of the lower leg, to which they are connected.


What are the treatments for the injury?

After an acute injury, RICE (rest, ice, compression, and elevation) will make the person more comfortable. Nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin or ibuprofen (i.e., Advil, Motrin), can be taken for a short time. Crutches are sometimes helpful. As the pain and swelling go down, it is important to work on regaining knee motion and strength.
Usually when a torn meniscus is diagnosed, an orthopedic surgeon will recommend arthroscopic surgery, to remove the torn part of the meniscus. Sometimes the tear can be repaired, if it is simple and at the edge of the meniscus.
Repair works best with a person under the age of 50 who is willing to accept a more complicated treatment. The operation takes longer and usually involves another longer incision. It takes about six weeks on crutches after the surgery, and several months before the person can return to sports.
In contrast, a simple arthroscopy to remove the torn portion uses two or more small incisions. Only about five days are spent on crutches after the surgery. The operation is done most often on an outpatient basis at a surgical center or hospital, and the individual is admitted and discharged on the same day.
Anesthesia can be general, or local with sedation, or spinal. Pain after the operation varies from almost none to quite a bit, depending mostly on the amount of swelling which, in turn, relates to the difficulty of the surgery. Usually the person needs to take pain medication, such as hydrocodone (i.e., Hycodan, Reprexain, Vicoprofen) or tramadol (i.e., Ultram), the first few nights in order to sleep.
The knee is wrapped in a bulky bandage after surgery. If the meniscus has been repaired, a knee immobilizer or splint is used. Often the person can exercise the knee after the operation with instructions from the surgeon. Physical therapy helps to speed the return of motion, strength and function of the knee.
A knee brace is not needed unless the knee ligaments are also damaged. After completing rehabilitation, the person can usually return to full activity including sports, unless arthritis or an unstable ligament prevents it.

Side Effects

What are the side effects of the treatments?

The knee can become stiff if it is immobilized for too long. If strengthening exercises are not started, the knee will weaken. This is because the quadriceps, the muscle on the front of the thigh that is the main support of the knee, atrophies, or becomes smaller, due to the injury and lack of use.

After Treatment

What happens after treatment for the injury?

Usually arthroscopy to remove the torn part of the meniscus results in an almost normal knee. However, some people continue to have pain, stiffness, and weakness in the knee. The remaining part of the meniscus could tear with the right kind of twisting injury.
When there is a lot of scarring in the knee after surgery, it is called arthrofibrosis. This may require physical therapy, knee manipulation, or forceful bending under anesthesia, or another arthroscopy to break up the scar tissue. During arthroscopy, it is possible for a ligament to be injured, which may cause the knee to be unstable.
Infection is very uncommon. Rarely, blood clots develop in the veins of the leg, a condition known as thrombophlebitis. One of these clots might break loose and travel from the leg through the heart to the lungs, resulting in a pulmonary embolism.
The knee is checked over time for recurring pain on the side, swelling, locking, or giving way. If any of these occur, the healthcare professional should be consulted.

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