OBJECTIVE: To analyze the reliability of 4 methods (water immersion, computer-aided design [CAD] photometric method, CAD hand scanner, and circumferential measurements) for stump volume measurement in transtibial amputees. DESIGN: Repeated measurements. SETTING: General community, ambulatory care. PARTICIPANTS: Transtibial amputees (N=26; mean age ± SD, 58.7±11.0y). INTERVENTIONS:Stump volume of patients with an amputation was measured on 2 occasions, each consisting of 2 sessions. In each session, stump volume was measured by 2 observers using each of the 4 methods. Sequence of observers and measurement methods was determined randomly. MAIN OUTCOME MEASURE: Repeatability coefficients, as a measure for reliability, for each method were calculated, as well as variance components to estimate the influence of measurement conditions on stump volumes measured. RESULTS:Repeatability coefficients varied from 129mL CAD hand scanner to 158mL CAD photometric method. Error variance contributed 12% to the total variance. Methods contributed 36%, method-amputee and occasion-amputee interactions contributed both 25% to the error variance. CONCLUSIONS:Repeatability coefficient was lowest for the CAD hand scanner, which indicates the best reliability. Substantial differences existed in stump volumes measured between the 4 methods.
RCT Entities:
OBJECTIVE: To analyze the reliability of 4 methods (water immersion, computer-aided design [CAD] photometric method, CAD hand scanner, and circumferential measurements) for stump volume measurement in transtibial amputees. DESIGN: Repeated measurements. SETTING: General community, ambulatory care. PARTICIPANTS: Transtibial amputees (N=26; mean age ± SD, 58.7±11.0y). INTERVENTIONS: Stump volume of patients with an amputation was measured on 2 occasions, each consisting of 2 sessions. In each session, stump volume was measured by 2 observers using each of the 4 methods. Sequence of observers and measurement methods was determined randomly. MAIN OUTCOME MEASURE: Repeatability coefficients, as a measure for reliability, for each method were calculated, as well as variance components to estimate the influence of measurement conditions on stump volumes measured. RESULTS: Repeatability coefficients varied from 129mL CAD hand scanner to 158mL CAD photometric method. Error variance contributed 12% to the total variance. Methods contributed 36%, method-amputee and occasion-amputee interactions contributed both 25% to the error variance. CONCLUSIONS: Repeatability coefficient was lowest for the CAD hand scanner, which indicates the best reliability. Substantial differences existed in stump volumes measured between the 4 methods.
Authors: Elena Seminati; David Canepa Talamas; Matthew Young; Martin Twiste; Vimal Dhokia; James L J Bilzon Journal: PLoS One Date: 2017-09-08 Impact factor: 3.240