title: Hay baler trauma to the upper extremity: a roller injury.
abstract: The mechanism of upper extremity trauma in three patients from a round hay baler is analyzed in relation to previously described experimental models of wringer or roller injury. One patient sustained an avulsive injury with typical tearing of the soft tissues. Thermal insult from roller friction heat and the duration of exposure were significant factors determining the extent of tissue injury in the other two patients.
mesh_terms: D000062:Accidents, Occupational; D000293:Adolescent; D000328:Adult; D000368:Aged; D000383:Agriculture / Q000295:instrumentation*; D000671:Amputation, Surgical; D001134:Arm Injuries / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D001186:Artificial Limbs; D006801:Humans; D008297:Male