CPT® Code 64858

The procedure described by CPT® Code 64858 refers to the suture repair of the sciatic nerve, which is a critical nerve in the human body responsible for motor and sensory functions in the lower limb. This surgical intervention, also known as end-to-end closure, is performed when the sciatic nerve has been transected or injured. The repair can be executed using various techniques depending on the location and severity of the injury. For injuries that are more distal, an epineural closure technique is typically employed, where the two ends of the damaged nerve are carefully exposed. In this method, the injured nerve may be repositioned to ensure a tension-free repair. The surgeon meticulously dissects the nerve from the surrounding tissues both proximal and distal to the injury site, allowing for proper alignment during the suturing process. In contrast, for more proximal injuries, a perineural closure technique is utilized. This involves exposing the epineurium of the nerve ends and pulling it back to reveal the individual fascicles, which are bundles of axons that perform specific functions, such as sensory or motor activities. The surgeon identifies and aligns these fascicles for end-to-end closure, ensuring that they are sutured together effectively. The suturing process is performed in a manner that prioritizes the deeper fascicles first, gradually moving towards the surface of the nerve until all structures are securely repaired. This meticulous approach is essential for restoring the nerve's functionality and promoting optimal healing. After the nerve repair is completed, the surrounding soft tissues and skin are closed in layers to facilitate recovery and protect the surgical site.