What Is Knee Arthroscopy?
Knee Arthroscopy is a procedure performed by orthopedic surgeons in which a small camera, known as an arthroscope, is inserted into the skin to examine the knee joint. The camera produces an image on a TV monitor, which assists the doctor guide surgical instruments when diagnosing and treating knee ailments.
Knee arthroscopy surgery is extremely common because of its minimally invasive nature. Patients who undergo knee arthroscopy generally do not experience lasting side effects or discomfort associated with larger knee surgeries.
The knee is the largest joint in the body. It is made up of the lower end of the thigh bone (femur), the shinbone (tibia), and the kneecap (patella). Other significant components of the knee include articular cartilage, synovium, meniscus, and collateral and cruciate ligaments. The articular cartilage is what helps the multiple knee bones to work smoothly with one another. The synovium is the thin lining which lubricates the entire joint. Two wedge-shaped pieces of meniscus cartilage act as buffers between the thigh bone and shinbone. The ligaments, of which there are four, hold the bones together and keep the knee secure.
When a Knee Arthroscopy is Utilized
When a person has a painful knee condition that fails to respond to non-surgical medical remedies, a doctor may recommend a knee arthroscopy. Arthroscopy is helpful in diagnosing and treating conditions such as:
- Torn floating meniscus
- Torn cartilage
- Removal of loose bodies and/or cysts
- Patella disorders
- ACL (Anterior Cruciate Ligament) reconstruction
- Treatment of infection
- Removal of inflamed tissue
- And more
Medial and lateral meniscus tears are generally twisting injuries and occur commonly to competitive athletes. These injuries can also occur when standing or elevating oneself from a squatting or sitting position. Especially as people age, meniscal cartilage becomes weaker and is hence more likely to experience a tear. Torn cartilage can be felt as intense pain on the inner or outer side of the knee, as swelling, as inhibited mobility, or as knee locking, especially if the cartilage becomes lodged between the multiple bones of the knee.
Knee Cartilage Tears
Meniscal tears unless extremely small do not generally heal easily on their own. As tears increase the likelihood of arthritis developing within the knee joint, it is often advised to remove the torn piece of cartilage. If the torn cartilage is not removed, pain, swelling, and joint-locking are likely to persist. Once the torn cartilage is removed, however, symptoms are likely to subside, and a full recovery is expected. In repairs such as these, patients are generally advised to avoid competitive athletics or intense weight bearing activity for at least three months.
Articular Cartilage Injury
Articular cartilage is surface cartilage. When it tears, shock absorption in the knee is greatly inhibited. Often, pieces of surface cartilage become dislodged and “float” within the knee, sometimes with piece of bone attached, which can cause the knee to lock and deteriorate. Very often this injury will lead to osteoarthritis if not treated correctly. Arthroscopic surgery can help patients with articular cartilage injuries progress to a healthy recovery.
Anterior Cruciate Ligament Injuries
The torn or ruptured ACL is a common injury in competitive athletics. You’ve likely witnessed this injury occur to one of your favorite athletes. When the ACL is ruptured, the knee becomes extremely unstable and reconstruction is required before a return to previous use can be expected. In ACL reconstruction, the arthroscope is used to aid in the building of a new ligament to replace the torn one.
Kneecap (Patella) Disorders
Kneecap disorders such as maltracking and significant surface tears are often treated with arthroscopies. Very often, if the injury is isolated, kneecap injuries can be rehabilitated with physical therapy.
Baker’s cysts, or popliteal cysts, often result in patients who endured a torn meniscus or have worn articular cartilage in the joint. These fluid-filled cavities can occasionally rupture, causing significant pain in the calf muscle. If they do not burst, and there are no symptoms associated with the diagnosis, often they will be left alone. In the case that Baker’s cyst treatment is required, and a patient does need a cyst removed, arthroscopies will aid the procedure.
Knee Arthroscopy Recovery
In comparison to other significant knee surgeries, knee arthroscopies do not generally experience great pain or discomfort following the procedure. As with all surgeries, it is normal to experience swelling for a number of days after the procedure. Using ice packs for about twenty minutes three to four times a day will aid in speeding up the recovery process. Pain medication will also be provided based on the patient’s level of pain. Bandages will wrap the operated knee and should not be removed without the doctor’s recommendation.
Risks Related to Knee Arthroscopy
Risks and/or complications from knee arthroscopies are rare, as the tools utilized are small and precise. Cases in which postoperative pain is greater than expected is most often attributed to more significant damage discovered in the knee than which was known previously. Risks associated with the procedure include:
- Postoperative bleeding
- Deep Vein Thrombosis (blood clots)
- Difficulty moving
- Pain near incision
- Vessel and/or nerve damage
In cases when greater damage to the knee is discovered during the arthroscopy, there is approximately a 65% chance of improving symptoms in the short to medium term, and further surgical procedures in the future cannot be ruled out. Knee arthroscopies have limited beneficial effects on knees which already suffer from osteoarthritis.
Rehabilitation Following Arthroscopy
The surgeon will provide instructions regarding physical therapy and general rehab following the procedure. It will be recommended to patients who undergo this procedure to strengthen the hamstrings and quadriceps as soon as possible, as this will aid in the recovery process. Patients who do not undergo ACL reconstruction should not expect to require crutches after the surgery. Most recoveries take place anywhere from 4-6 weeks after the surgery, depending on the complexity and scale of the procedure. Competitive athletes should expect a similar time frame before returning to the field.
Frequently Asked Questions About Knee Arthroscopy
How long will I be in the Hospital for Knee Arthroscopy?
Approximately 4 hours
Do I need crutches afterward?
You will not need crutches afterward unless you are having Anterior Cruciate Ligament Reconstruction
How long after can I get the knee wet?
You can remove the bandage and apply a waterproof dressing after 24 hours
How long after knee arthroscopy can I drive?
You can drive 24 hours after knee arthroscopy if you feel comfortable
How long until I can return to work?
You can return to work as soon as your knee feels comfortable
How long after can I swim?
You can swim after your stitches are removed
How long will my knee take to recover?
Usually it takes 4 to 6 weeks following the surgery to recover
When Can I return to Sports?
You can usually return to sports 4-6 weeks after surgery