To repair a ruptured tendon involves making an incision, locating both ends of the tendon, and suturing them back together. If a rupture is left untreated, the two tendon ends shorten over time, making repair more difficult as more time passes. With flexor tendon injuries it is very important repair occurs ASAP. This surgery is performed on an outpatient basis, meaning you will be able to go home on the same day of the surgery.