Article

Ischiofemoral impingement is a potential cause of hip and buttock
pain. It is evaluated commonly with magnetic resonance imaging (MRI). To our
knowledge, no study previously has evaluated the ability of ultrasound to measure
the ischiofemoral space (IFS) dimensions reliably.
OBJECTIVE: To determine
whether ultrasound could accurately measure the IFS dimensions when compared with
the gold standard imaging modality of MRI. DESIGN: A methods comparison study.
SETTING: Sports medicine center within a tertiary-care institution. PARTICIPANTS:
A total of 5 male and 5 female asymptomatic adult subjects (age mean = 29.2
years, range = 23-35 years; body mass index mean = 23.5, range = 19.5-26.6) were
recruited to participate in the study. METHODS: Subjects were secured in a prone
position on a MRI table with their hips in a neutral position. Their IFS
dimensions were then acquired in a randomized order using diagnostic ultrasound
and MRI. MAIN OUTCOME MEASUREMENTS: The main outcome measurements were the IFS
dimensions acquired with ultrasound and MRI. RESULTS: The mean IFS dimensions
measured with ultrasound was 29.5 mm (standard deviation [SD] 4.99 mm, standard
error mean 1.12 mm), whereas those obtained with MRI were 28.25 mm (SD 5.91 mm,
standard error mean 1.32 mm). The mean difference between the ultrasound and MRI
measurements was 1.25 mm, which was not statistically significant (SD 3.71 mm,
standard error mean 3.71 mm, 95% confidence interval -0.49 mm to 2.98 mm, t19 =
1.506, P = .15). The Bland-Altman analysis indicated that the 95% limits of
agreement between the 2 measurement was -6.0 to 8.5 mm, indicating that there was
no systematic bias between the ultrasound and MRI measurements. CONCLUSIONS: Our
findings suggest that the IFS measurements obtained with ultrasound are very
similar to those obtained with MRI. Therefore, when evaluating individuals with
suspected ischiofemoral impingement, one could consider using ultrasound to
measure their IFS dimensions. LEVEL OF EVIDENCE: III.
CI - Copyright (c) 2017 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS