Article

Tendon collagen organization
can be estimated by peak spatial frequency radius (PSFR) on ultrasound images.
Characterizing PSFR can define the contribution of collagen disruption to
shoulder symptoms.
The purpose of this was to characterize
the (1) supraspinatus tendon PSFR in participants with subacromial pain syndrome
(SPS) and healthy controls; (2) PSFR between participants grouped on a tendon
visual quality score; and (3) relationship between PSFR with patient-reported
pain, function, and shoulder strength. METHODS: Participants with SPS (n = 20)
and age, sex, and arm-dominance-matched healthy controls (n = 20) completed
strength testing in scaption and external rotation, and patient-reported pain,
and functional outcomes. Supraspinatus tendon ultrasound images were acquired,
and PSFR was calculated for a region of interest 15 mm medial to the
supraspinatus footprint. PSFR was compared between groups using an independent
t-test and an analysis of variance to compare between 3 groups for visually
qualitatively rated tendon abnormalities. Relationships between PSFR with pain,
function, and strength were assessed using Pearson correlation coefficient.
RESULTS: Supraspinatus tendon PSFR was not different between groups (P = .190) or
tendon qualitative ratings (P = .556). No relationship was found between PSFR and
pain, functional loss, and strength (P > .05). CONCLUSIONS: Collagen disruption
(PSFR) measured via ultrasound images of the supraspinatus tendon was not
different between participants with SPS or in those with visually rated tendon
defects. PSFR is not related to shoulder pain, function, and strength, suggesting
that supraspinatus tendon collagen disorganization may not be a contributing
factor to shoulder SPS. However, collagen disruption may not be isolated to a
single region of interest. LEVEL OF EVIDENCE: 3b: case-control study.
CI - Copyright (c) 2017 Hanley & Belfus. Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS