The mechanical performance of ambulation using spring-loaded axillary crutches. A preliminary report.
Crutches with the extension post replaced by a spring-loaded post were compared with standard axillary crutches with respect to stresses developed during the stance phase of locomotion. Seven subjects were tested using both standard and spring-loaded crutches. The crutches were fitted with strain gauges; crutch length and grip location were adjusted for each subject using accepted standards. Subjects ambulated using a three-point "swing-through" gait pattern while strain gauge data were recorded. Spring-loaded axillary crutches had 22% smaller shock waves upon initial contact and 24% smaller peak stresses (P less than 0.05). Subjects reported improved endurance and comfort with the spring-loaded crutch. Although larger trials will be necessary, these initial results show promise in reduction of impact-loading of the upper extremity of patients using axillary crutches.
Brown University Program in Medicine, Department of Rehabilitation Medicine, Rhode Island Hospital, Providence 02903.
J R
JR
Parziale
J D
JD
Daniels
D003446:Crutches; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D005260:Female; D005684:Gait; D006801:Humans; D008297:Male