Article

Ultrasound (US) imaging can be used for the measurement of trunk
muscle activity. The displacements of US transducer, especially during more
dynamic situations, however, may disturb the measurement results. To control this
variable, some studies have used transducer fixator (TF),
but no study evaluated
the effect of using TF on US reliability in dynamic situations. The present study
discriminated this issue. OBJECTIVE: To investigate the intrasession and
intersession reliability of lateral abdominal muscle thickness measurement in
dynamic standing postural tasks by using US with and without TF in participants
with and without chronic low back pain (CLBP). DESIGN: An intersession and
intrasession reliability study. SETTING: Biomechanics laboratory, Neuromuscular
Rehabilitation Research Center, Semnan University of Medical Sciences, Semnan,
Iran. PARTICIPANTS: Twenty-three patients with CLBP and 23 healthy matched
individuals. METHODS: Abdominal muscle thickness of all the subjects was
evaluated with use of US imaging with the patient in the supine position and
double-leg stance at different levels of platform stability of BBS (static,
levels 6 and 3), with and without using TF. Intraclass correlation coefficients
(ICCs), standard errors of measurement, minimal metrically detectable changes,
and coefficients of variation were calculated to determine intersession and
intrasession reliability of muscle activity measure. MAIN OUTCOME MEASUREMENTS:
Lateral abdominal muscle thickness. RESULTS: The intersession ICCs in the
conditions with TF ranged from 0.93 to 0.98 and 0.97 to 0.99 in CLBP and healthy
individuals, respectively. The intersession ICCs in the conditions without TF
ranged from 0.67 to 0.79 and 0.7 to 0.86 in CLBP and healthy groups,
respectively. In addition, smaller standard errors of measurement and minimal
metrically detectable change values were observed with US measurement in both the
groups when TF was used. CONCLUSION: US imaging appears to have acceptable
reliability for the assessment of abdominal muscle thickness during dynamic
standing tasks in individuals with and without CLBP.
The use of TF results in
greater levels of reliability during US measurement of abdominal muscle. LEVEL OF EVIDENCE: III.
CI - Copyright (c) 2016 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS