Spock: Unusual log-splitter injury 117 Figure 2. Intra-opera- tive photo of ulnar artery avulsion forearm, a total avulsion injury of the ulnar artery was evident with the proximal and distal components of the ulnar artery sepa- rated by 5 cm (Figure 2). The intervening gap between the ends of the ulnar artery con- tained torn and stretched adventitial tissue. Exploration of the radial volar forearm showed a discrete 0.75 cm area of thrombus within the radial artery about 1.5 cm proxi- mal to the wrist crease. The remainder of the architecture of the radial artery was intact. A radial artery thrombectomy was performed. Vascular reconstruction of the ulnar ar- tery was performed using an 8 cm interposi- tion saphenous vein graft from the forearm to the superficial palmar arch. The patient was maintained on aspirin post-operatively, and strong Doppler signals were maintained from both the radial and ulnar arteries. A post-operative MRI revealed scaphol- unate ligament disruption and rotary sublux- ation of the scaphoid (Figure 3). The lateral view of the wrist demonstrated dorsal tilt of the lunate consistent with a DISI deformity. In addition, a fracture fragment was seen distal to the ulnar styloid process, likely rep- resenting an avulsion off the pisiform. At 12 months, the patient underwent a proximal row carpectomy as well as an open procedure using a K-wire to pin a dislocated capitate of the wrist. The patient currently has normal 2-point discrimination in all dig- its and the ability to pinch with 5 pounds of strength. The patient has some residual intrinsic muscle fibrosis and decreased thenar muscle mass. The thumb-index space is tight, sec- ondary to partial adductor muscle fibrosis, and the patient has difficulty with prehensile activities secondary to this fibrosis. He also has difficulty extending the thumb out of the plane of the palm and thumb abduction sec- ondary to partial fibrosis of thenar muscles; however, he can oppose his thumb pulp to all fingertips. In addition, the patient has re- turned to work. DISCUSSION A log splitter is a gasoline- or diesel- powered machine that uses a hydraulic-pow- ered cutting wedge to do the work of an axe. The typical log splitter consists of a flat, nar- row platform with a splitting wedge in a fixed position at one end and a moveable driving ram at the other. A lever control en- gages a hydraulic pump powered by an en- gine to advance and withdraw the ram. Pressures upward of 13.5 meganewtons per square meter are generated [1]. Log-splitter injuries are uncommonly reported in the medical literature. A Medline