Knee Problems: Arthroscopic Surgery

What is Arthroscopy?

D. Petricic

Arthroscopy is a surgical procedure which orthopaedic surgeons use to view, diagnose and treat problems inside the knee joint. The word arthroscopy comes from Greek words Arthros (joint) and Scopos (to look). The term literally means "to look inside the joint". In an arthroscopic operation, an orthopaedic surgeon makes a small incision in the patient's skin and then inserts the arthroscope, a miniature lens and lighting system, which magnifies and illuminates the structures inside the joint. This small instrument is approximately 5 mm in diameter. An intense, cool light is transmitted through fibreoptic cables to the end of the arthroscope that is inserted into the joint. By using a miniature colour video camera attached to the arthroscope, the surgeon is able to see the interior of the knee joint on a large television screen.

Why is Arthroscopy Necessary?

A knee joint is lined with the synovial lining, that normally produces minute amounts of joint lubricant and nutrient called synovial fluid, and contains dense and elastic tissue lining bone ends and the underside of the kneecap called articular cartilage, two tough cartilage cushions called medial and lateral menisci and fibre-like connecting tissue called ligaments. The articular cartilage, menisci and ligaments cushion the bones and stabilise the joint. Injuries and disease can damage synovial lining, bones, articular cartilage, menisci, ligaments, muscles and tendons.

Arthroscopic knee surgery		Normal meniscus and articulating surfaces

Diagnosing knee joint injuries and other conditions begins with a thorough medical history, physical examination, x-ray films (mainly for bone pathology) and, quite often, MRI (magnetic resonance imaging, mainly for soft tissue and articular cartilage injury). Further diagnosis using arthroscopy may be required because it gives a precise, direct view of the affected structures inside the joint. However, surgical intervention for various problems affecting the inside of the knee joint is the main reason for arthroscopy nowadays. Some of the most frequent conditions found during arthroscopic examination of the knee joint are:

• Torn or degenerate meniscus or menisci (cartilage).
• Torn cruciate ligaments.
• Loose fragments of cartilage or bone.
• Damaged joint surface (articular cartilage)
• Inflammation of the joint lining (synovitis)
• Maltracking and tilted patella (kneecap)

How is Arthroscopy Performed?

Arthroscopic surgery requires the use of a hospital operating theatre. Before the procedure, a patient is given an anaesthetic. The tourniquet (tight cuff above the knee and around the thigh) may be used to temporarily interrupt the local circulation. The leg is painted, usually pink or light brown, to disinfect the skin surrounding the knee. Then a sterile fluid is introduced into the knee joint to expand it, making room for the arthroscope and surgical instruments. The surgeon makes a small incision in the skin and inserts the arthroscope. Usually 2 to 3 incisions, called portals, are necessary in order to examine the inside of the joint. A surgical instrument is used to probe various parts within the joint to determine the quality of the tissue and extent of the problem. If surgery is indicated, it is performed with specially designed manual or power-driven instruments that are inserted into the joint through the portals.

A selection of your arthroscopic images will be recorded and stored digitally, and kept as a part of your hospital record. We will give you a copy of the full arthroscopy report, with four representative intra-articular images. If you wish to have more detailed imaging information or the video recording please ask us to record your arthroscopic operation on a CD.

We may ask you to sign an Imaging Consent Form (see below), according to the guide of the Department of Health, Nuffield Hospitals’ policy and the Data Protection Act 1998.

Downloads:

Chester Knee Clinic Arthroscopic Surgery Brochure Chester Knee Clinic Exercises After Arthroscopy Chester Knee Clinic Imaging Consent Form

Site last updated on: 09 May 2008

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