Arthroscopy (also called arthroscopic or keyhole surgery) is a minimally invasive surgical procedure on a joint in which an examination and sometimes treatment of damage is performed using an arthroscopy, an endoscope that is inserted into the joint through a small incision. Arthroscopic procedures can be performed during ACL reconstruction. While commonly used for meniscal injuries to the knee, this use is not supported by the evidence.
Knee arthroscopy has in many cases replaced the classic open surgery (arthrotomy) that was performed in the past. Arthroscopic knee surgery is one of the most common orthopaedic procedures, performed approximately 2 million times worldwide each year. The procedures is more commonly performed to treat meniscus injury and to perform anterior cruciate ligament reconstruction. During an average knee arthroscopy, a small fiber optic camera (the arthroscopy) is inserted into the joint through a small incision, about 4 mm (1/8 inch) long. More incisions might be performed in order to visually check other parts of the knee and to insert the miniature instruments that are used to perform surgical procedures
Arthroscopy is commonly used for treatment of diseases of the shoulder including sub acromial impingement, acromioclavicular osteoarthritis, rotator cuff tears, frozen shoulder (adhesive capsulitis), chronic tendonitis, removal of loose bodies and partial tears of the long biceps tendon, SLAP lesions and shoulder instability. The most common indications include sub acromial decompression, bank arts lesion repair and rotator cuff repair. All these procedures were done by opening the joint through big incisions before the advent of arthroscopy. Arthroscopic shoulder surgeries have gained momentum in the past decade. "Keyhole surgery" of the shoulder as it is popularly known has reduced inpatient time and rehabilitation requirements and is often a daycare procedure.