Article

The objective of the study was to assess the measurement properties of an
indirect volumetric measurement using segmental circumferential measurements
fitted into a formula of a truncated cone (Sitzia's method) in long-term
transtibial amputees. Twenty-eight participants with a transtibial amputation >1
year participated in the study. Two observers measured stump volume twice, two
weeks apart, using both Sitzia's method and the water displacement volumetric
method (criterion standard test). The mean differences and upper and lower limits
of agreement between the water displacement volumetric method and Sitzia's
method, between the first and second assessment, and between both assessors were
calculated. Intra-class correlation coefficients (ICCs) were derived from
random-effects two-way analysis of variance. Inter-observer agreements of both
methods were high and ranged from 86-96%. Intra-observer agreement ranged between
57% and 71%. In both methods the inter- and intra-observer differences were not
significant. ICCs ranged from 0.88-0.99 and were better for inter-observer
compared to intra-observer reproducibility. Lower stump volumes were observed in
Sitzia's method compared to water displacement volumetric method, with high ICC's
(0.92-0.95) between both methods. Although Sitzia's method systematically
underestimates stump volume,
it is a reliable and feasible alternative to the
criterion standard test.
To determine its validity to detect (longitudinal)
differences in stump volume, follow-up research is needed in participants with
recent amputations.

Langue : ANGLAIS