Certified Surgical First Assistant (CSFA) Practice Test

The choice of nerve damage as a common complication of internal K-wire fixation for a Colles' fracture is grounded in the understanding of the anatomy and median nerve involvement in wrist fractures. During K-wire fixation, the placement of wires can inadvertently impinge on surrounding soft tissue structures, including nerves, particularly the median nerve which runs in proximity to the wrist joint. Colles' fractures typically occur in the distal radius and involve the wrist, where the nerves are anatomically located. If the K-wires are placed improperly or if there is significant swelling and displacement from the fracture, there is a risk that the median nerve may be compressed or injured, leading to complications such as numbness, tingling, or weakness in the hand. While skin infection, bone necrosis, and joint stiffness are also risks associated with K-wire fixation and fracture stabilization, they are not as directly related to the nerve damage that can occur during or after the procedure. Skin infection usually results from surgical exposure rather than from the K-wires themselves, bone necrosis is more common with extensive ischemia, and joint stiffness generally arises from immobility after the fracture rather than from the fixation technique. Therefore, nerve damage stands out as a critical concern directly associated with the process of internal