Results vsrisks of surgery

Like all surgeries, knee arthroscopy comes with certain risks.


The outcomes for knee arthroscopy vary depending on the problem and the type of procedure that is performed. 

Recently, doubts have been raised about the long-term benefits of knee arthroscopy, but for specific conditions, such as meniscus and ligament repair, it’s still considered highly effective.

You can anticipate a poorer outcome for degenerative conditions, such as osteoarthritis and a longer recovery time for more complex surgeries.


Most arthroscopic knee surgeries are problem-free but about one patient in 20 may have complications. Complication rates vary between types of procedure.

The highest rate of complications is seen in posterior cruciate ligament reconstruction (20.1%) and the lowest for meniscectomy (2.8%). Learn about Types of knee arthroscopy.

Most complications can be successfully treated, although sometimes further surgery is needed. The most frequent complications are:

  • Infection following knee arthroscopy is extremely low. Approximately 0.1% (1 in 1,000) patients develop infection of the joint following surgery. In some cases, infection is limited to the skin and soft tissues and may only require antibiotics for treatment. Infection that extends to the joint is known as “septic arthritis” and will often lead to more surgery. To learn more about signs of infection go to Caring for your knee.
  • Blood clots may develop within the veins of your calf following knee arthroscopy – this is known as deep vein thrombosis (DVT). In uncommon cases, the clots may travel from your veins to your lungs and cause a pulmonary embolism, which can be fatal. Blood clots are extremely rare after knee arthroscopy as you’re usually allowed to walk straight away, which helps to prevent clots.
  • Blood loss is minimal as a tourniquet is used to reduce bleeding, so transfusions aren’t usually needed. If you’re taking blood-thinning drugs you may be asked to stop them before surgery. 
  • Bleeding inside the joint, which can cause severe pain and swelling. 
  • Stiffness and swelling of the knee is expected after surgery. The swelling usually resolves in a few weeks but physiotherapy is essential during the recovery time to prevent lasting stiffness.
  • Damage to the nerves near the joint can lead to numbness and loss of sensation, which may be temporary or permanent. 

Ask your surgeon about the results and risks associated with your surgery. Also ask about their own rates of patient satisfaction and the rate of complications following the surgeries they’ve performed.  


How to find a surgeon who specialises in your procedure and participates in the HCF No-Gap or Known-Gap scheme.

important information

Information is provided by HCF in good faith for the convenience of members. It is not an endorsement or recommendation of any form of treatment nor is it a substitute for medical advice, and you should rely on the advice of your treating doctors in relation to all matters concerning your health. Ever effort has been taken to ensure the accuracy of the information, however HCF takes no responsibility for any injury, loss, damage or other consequences of the use of this information.