In arthroscopic surgery, the surgeon makes several tiny incisions. An arthroscope, an instrument with a lighted scope connected to a monitor, is inserted into one; instruments that actually perform the procedure go into the others. There is a wide range of surgeries that can be performed arthroscopically. One type, knee chondroplasty, reshapes cartilage. Debridement—removing irritants like loose bits of cartilage and flushing the joint with saline—is often performed at the same time.