Arthroscopy is performed, if an internal structural damage of the knee is suspected. Torn medial and lateral meniscus are common injuries caused by rotational motion. The injury may be due to an accident or degeneration that is usually connected to arthritis of the knee.

Other conditions treated using keyhole surgery are e.g. damaged surface cartilage, irritated fold of the synovial membrane in the joint (plica syndrome), and loose bodies. Possible symptoms caused by these conditions include pain, locking, and swelling.


Keyhole surgery of the knee is usually performed under spinal anaesthesia, and patients may observe the procedure through a monitor if they want to. The duration of the anaesthesia is approximately 3–4 hours. Patients can not move their legs by themselves, nor can they walk or stand during the anaesthesia.

In the keyhole surgery, a 0.5 cm thick arthroscope is taken into the joint through a small incision in the skin. The picture provided by the camera in the arthroscope is seen on a television screen. In the procedure, the torn area of the meniscus, plica, or loose bodies inside the joint are removed with an instrument. The procedure takes approximately 30–60 min. 2–3 small wounds are left from the surgery, depending on the number of instruments required.


You may walk immediately after the anaesthesia wears off. However, you should avoid heavy physical effort for a week. At first, you may use crutches as a support for a few days. You should move gradually to the normal level of physical effort within 2–3 weeks.

During the first few days the knee will be slightly swollen, and consequently the knee may feel less flexible than usual.

Wound care

The dressings may be removed after 24 hours, after which you may shower. Elastic bandage may be used for a few days to support the knee.

The sutures are removed after 7–12 days at your health centre, occupational health centre, or health clinic (neuvola).

You may go to sauna 24 hours after the removal of the sutures.

Treatment of pain

Regular pain relief medication, elevated position, elastic bandage, and ice pack therapy efficiently reduce swelling and pain after the operation, contributing to the recovery. It is recommended that you take pain killers regularly for 1–4 days and after that when necessary.

Contact us

If you experience inflammatory symptoms (increasing pain, heavy swelling, warmth, redness, continuous wound discharge) or other problems, contact your health centre or treating unit.

  • Day Surgery Unit
  • Emergency Department
  • Your own health centre or occupational health centre  
10/17/2019 päiväkirurgia 2