The Effect of Isometric Shoulder Internal and External Rotation on the Acromiohumeral Distance

Abstract

The AHD was not affected by resistive isometric internal rotation of the shoulder, although it decreased with resistive isometric external rotation at 45 degrees of shoulder abduction. Resistive isometric shoulder external rotation in a position of abduction should be used with caution when the goal is to maintain the AHD. Further research is required to determine the effects of isometric contraction in patients with subacromial impingement syndrome.

Acromiohumeral distance measurement in rotator cuff tendinopathy: is there a reliable, clinically applicable method? A systematic review

“…The testers undertaking the ultrasound scanning were physiotherapists in seven of the studies,7–9 24 26 31 32 variously described as having training ranging from 1 hour to 3 months, and radiologists in two of the studies,23 30 with one study not providing details of the raters 25. One study reported similar degrees of reliability between an experienced radiologist (ICC=0.94) and a novice in ultrasound (ICC=0.92),30 while in two studies by the same authors, one using a physiotherapist trained in shoulder ultrasound, and the other using student physiotherapists with limited training or experience, slightly better reliability was reported with the experienced examiner (ICC=0.96–0.99)26 compared with the novices (ICC=0.88–0.91) 27…”

“…All studies reported the reliability of measuring separate images of the same participant, while two also studied the intra-rater reliability of repeated measurements of the same image 30 32. There were varied time intervals used for the repeated scans, ranging from within-session scans to others taken up to 2 weeks26 or 6 weeks later 29.…”

Ultrasound measures of supraspinatus tendon thickness and acromiohumeral distance in rotator cuff tendinopathy are reliable

“…The size of the subacromial space is quantified using radiologic methods to measure the acromiohumeral distance (AHD) . The normal AHD, measured on ultrasound (US) in the neutral shoulder position, ranged between 9 mm and 12 mm in recent studies, and reduced values ranging from 6 mm to 10 mm have been reported in US studies of people with varying degrees of tendon pathology . We could identify only two studies that evaluated the reliability of US measurement of the AHD in people with shoulder pain, and only the Pijls et al study evaluated interrater reliability.…”

Omuz iç rotasyonunun korakohumeral ve akromiyo aralığa etkisinin üç boyutlu tomografi ile değerlendirilmesi

“…2014'te Kim ve arkadaşları'nın USG çalışmasında bu aralığın nötral rotasyona göre omzun iç rotasyonunda daraldığı ifade edilmişir 25 . 2012'deki başka bir çalışmada ise White ve arkadaşları 45° abdüksiyonda AHA'nın eksternal rotasyon ile daha dar olduğunu bildirmişlerdir 26 . Bizim çalışmamızda AHA değerlerinin omzun pasif iç rotasyonu ile anlamlı miktarda değişmediği, hatta hemen hemen aynı kaldığı görüldü.…”