Possible complications of arthroscopic surgery include:
Accidental damage to cartilage or ligaments inside the joint
Excessive bleeding inside the joint
Accidental damage to nerves or blood vessels near the joint
Inflammation and formation of blood clots inside veins, most often in the leg
Breakage of a surgical instrument inside the joint
Allergic or other reaction to an anesthetic
Complications occur in very few arthroscopic surgeries. Overall, the risk of complications in arthroscopic surgery is much less than for conventional open surgery.