Hand Function after Digital Amputation

Abstract

127 patients with amputated thumbs or fingers between the level of the DIP and MP joints were followed up at regular intervals until one year after injury. Sensory disturbances subsided rapidly except for numbness which was still present in 50% at one year. Range of movement was regained early. Although pronation and supination improved to 70% only a few months after injury, it took a year for power grip and key pinch to regain 70%. Further analysis showed that power grip was worst in amputees of multiple fingers, thumb, and the middle finger through the proximal phalanx. For key pinch, almost all were impaired to a level of 50% to 60%. Multiple finger amputees also had decreased pronation, and thumb amputees had decreased supination. Other factors were not significant. One-quarter had to change their jobs and one-fifth showed concern with the appearance.