In vivo dynamic acromiohumeral distance in shoulders with rotator cuff tears

Kozono, Naoya; Okada, Takamitsu; Takeuchi, Naohide; Hamai, Satoshi; Higaki, Hidehiko; Shimoto, Takeshi; Ikebe, Satoru; Gondo, Hirotaka; Nakanishi, Yoshitaka; Senju, Takahiro; Nakashima, Yasuharu

doi:10.1016/j.clinbiomech.2018.07.017

Cited by 10 publications

(7 citation statements)

References 34 publications

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“…Previous studies have reported that AHD had changed in a monomodal or parabolic pattern during arm elevation, 3 , 17 similar to what we observed. Our results show AHD was smaller between 60° and 120° of humeral elevation, corresponding to the painful arc, 15 with the smallest distance of approximately 3 mm regardless of the posture.…”

Section: Discussionsupporting

confidence: 91%

Comparing in vivo three-dimensional shoulder elevation kinematics between standing and supine postures

Sugi¹,

Matsuki²,

Fukushi³

et al. 2021

JSES International

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Background It is often assumed that body posture, standing vs. supine, changes shoulder muscle activation and range of motion, but these altered shoulder mechanics have not been objectively assessed. We expected the supine posture might facilitate scapular rotation and change subacromial pressure. The purpose of this study is to evaluate the influence of body posture on shoulder kinematics during arm elevation. Methods Ten males and eight females with a mean age of 33 years participated in this study. Shoulder kinematics were assessed during scapular plane elevation in the standing and supine postures by using single-plane fluoroscopic images. Kinematics were measured using 3-dimensional to 2-dimensional model-image registration techniques: matching the 3-dimensional bone model derived from computed tomography onto each fluoroscopic image. Glenohumeral superior/inferior translation, acromiohumeral distance, and scapular rotations were compared between the postures. The effect of sex also was evaluated. Results With the arm at the side position, the humeral head in the supine posture was located 0.5 mm superior compared to the standing posture ( P < .001). During humeral elevation, the humeral head significantly shifted more inferiorly in the supine posture than in standing; the biggest mean difference was 0.6 mm, P = .003. But acromiohumeral distance during elevation was not significantly affected by the body posture ( P = .05). Scapular upward rotation and posterior tilt were significantly different between the postures ( P < .001). Sex had statistically significant, but quantitatively small, effects on shoulder kinematics. Conclusions Body postures affect shoulder kinematics during humeral elevation. This knowledge will be useful to optimize rehabilitation exercises and for diagnostic insight.

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Section: Discussionsupporting

confidence: 91%

Comparing in vivo three-dimensional shoulder elevation kinematics between standing and supine postures

Sugi¹,

Matsuki²,

Fukushi³

et al. 2021

JSES International

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“…Consequently, numerous studies have compared measures of the subacromial space between asymptomatic controls and participants diagnosed with ''impingement syndrome'' 3---6 or rotator cuff tears. 7,8 However, these studies often report small or no group differences, which has called into question the presumption of subacromial compression as a mechanism for rotator cuff pathology.…”

Section: Introductionmentioning

confidence: 99%

Shoulder kinematics impact subacromial proximities: a review of the literature

Lawrence

Braman

Ludewig

2020

Brazilian Journal of Physical Therapy

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Background: Alterations in glenohumeral and scapulothoracic kinematics have been theorized to contribute to rotator cuff pathology by impacting the magnitude of the subacromial space. Objective: The purpose of this review is to summarize what is currently known about the relationship between shoulder kinematics and subacromial proximities. Conclusions: A variety of methods have been used to quantify subacromial proximities including photographs, MR imaging, ultrasonography, and single-and bi-plane radiographs. Changes in glenohumeral and scapulothoracic kinematics are associated with changes in subacromial proximities. However, the magnitude and direction of a particular motion's impact on subacromial proximities often vary between studies, which likely reflects different methodologies and subject populations. Glenohumeral elevation angle has been consistently found to impact subacromial proximities. Plane of humeral elevation also impacts subacromial proximities but to a lesser degree than the elevation angle. The impact of decreased scapulothoracic upward rotation on subacromial proximities is not absolute, but instead depends on the angle of humerothoracic elevation. The effects of scapular dyskinesis and humeral and scapular axial rotations on subacromial proximities are less clear. Future research is needed to further investigate the relationship between kinematics and subacromial proximities using more homogenous groups, determine the extent to which compression and other factors contribute to rotator cuff pathology, and develop accurate and reliable clinical measures of shoulder motion.

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“…In our study, the AHD findings in 59 non-athlete patients revealed a significantly smaller AHD in FG (P < 0.001). A positive relationship was found between a reduced AHD and the severity of STT [21]. Saupe also found a higher prevalence of full-thickness STT in the reduced AHD patient FG Full-thickness supraspinatus tendon tear group PG Partial-thickness supraspinatus tendon tear group p: statistical significance between the two groups.…”

Section: Discussionmentioning

confidence: 72%

Correlation between acromiohumeral distance and the severity of supraspinatus tendon tear by ultrasound imaging in a Chinese population

Tian

et al. 2020

BMC Musculoskelet Disord

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Background: The aim of this study was twofold: (i) to investigate the intrarater reliability of acromiohumeral distance measurement; (ii) to assess the level of association between acromiohumeral distance measured by ultrasonography, and the degree of supraspinatus tendon tear, in patients suffering from chronic shoulder pain. Methods:A cross-sectional, case-control study was carried out. A convenience sample comprising 59 patients with a unilateral supraspinatus tendon tear was assessed. Both shoulders of each patient were scanned by ultrasound, with the contralateral asymptomatic shoulders serving as the control group for comparison. Acromiohumeral distances of each shoulder were measured and analysed. Results: Intrarater reliability was excellent for the ultrasound method of acromiohumeral distance measurement. The acromiohumeral distance of shoulders with full-thickness supraspinatus tendon tear was significantly smaller than that of joints with partial-thickness supraspinatus tendon tear and an intact supraspinatus tendon. There was a significant positive correlation between reduced acromiohumeral distance and the severity of a supraspinatus tendon tear. Conclusions:Ultrasound is a reliable tool to measure acromiohumeral distance. A positive relationship was found between a narrowed acromiohumeral distance and the severity grading of a supraspinatus tendon tear. Reduced acromiohumeral distance can be considered a predictive parameter for a full-thickness supraspinatus tendon tear.Trial registration: The study was prospectively registered with the Chinese Clinical Trial Registry. Registration number: ChiCTR-ROC-17013550. Date of registry: 26 November 2017.

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In vivo dynamic acromiohumeral distance in shoulders with rotator cuff tears

Cited by 10 publications

References 34 publications

Comparing in vivo three-dimensional shoulder elevation kinematics between standing and supine postures

Comparing in vivo three-dimensional shoulder elevation kinematics between standing and supine postures

Shoulder kinematics impact subacromial proximities: a review of the literature

Correlation between acromiohumeral distance and the severity of supraspinatus tendon tear by ultrasound imaging in a Chinese population

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