Fluoroscopic assessment of rotator cuff fatigue on glenohumeral arthrokinematics in shoulder impingement syndrome

Digital fluoroscopic video assessment of glenohumeral migration: Static vs. Dynamic conditions

“…The focus of this study was to use DFV to analyze the inferior and superior migration of the humeral head with respect to the glenoid fossa (GH migration) during elevation of the arm in the scapular plane in subjects without a prior history of shoulder pathology. A secondary purpose of this study was to confirm previously published reliability values associated with this measurement technique using a different set of raters (Royer et al, 2009;Teyhen et al, 2008).…”

“…This position was the same as that used in previous studies (Chen et al, 1999;Deutsch et al, 1996;Yamaguchi et al, 2000). A 1.36 kg weight was held in the subject's right hand to be consistent with other studies (Poppen and Walker, 1976;Royer et al, 2009;Teyhen et al, 2008). To control for an order effect, random assignment determined the order of imaging (dynamic, static; arm at side, 451, 901, and 1351).…”

“…DFV were obtained using a technique previously described (Royer et al, 2009;Teyhen et al, 2008); which was modeled after the work of Poppen and Walker (1976) and Chen et al (1999). The subject stood in anatomical position at a 301 angle to the image intensifier to ensure that the X-ray beam was perpendicular to the plane of the scapula.…”

“…A potential advantage of DFV is the ability to assess underlying arthrokinematics in real-time, which facilitates analysis of joint biomechanics and diagnosis of joint abnormalities (Carmack et al, 2001;Royer et al, 2009). However, images obtained in the majority of previous studies utilizing fluoroscopy were taken with the GH joint held in static positions (Ebraheim et al, 2000;Mandalidis et al, 1999;Papilion and Shall, 1992) and may not provide a description of GH migration during movement.…”

“…Recently researchers have used DFV to design a reliable protocol to evaluate GH migration during dynamic shoulder elevation in those with and without shoulder pathology (Royer et al, 2009;Teyhen et al, 2008). Both investigations found significant superior GH migration under dynamic conditions.…”