Arthroscopy is the technique of placing a rigid endoscope directly into a joint. It allows visualisation under magnification resulting in greater diagnostic capabilities than conventional treatment would allow. Some diseases can be treated with the endoscopes in place, preventing the need for the animal to undergo a large invasive surgical procedure. The benefit of this is that the patient recovers much more rapidly having had less trauma and in significantly less pain. Arthroscopy can be used to investigate abnormalities in most joints but in particular is used for investigating problems predominantly in the shoulder, elbow and knee joints.