Impact of shoulder rotation on neck-shaft angle: A clinical study - 16/09/17
, E.A. Malavolta, R.A. Beraldo, M.E.C. Gracitelli, M. Bordalo-Rodrigues, A.A. Ferreira Neto
Bienvenido a EM-consulte, la referencia de los profesionales de la salud.
Artículo gratuito.
Conéctese para beneficiarse!
Abstract |
Background |
Two recent experimental studies evaluated the influence of shoulder rotation on neck-shaft angle, with conflicting results. However, there have been no clinical studies of whether this angle varies in different shoulder positions. The present study aimed to determine whether shoulder rotation affects neck-shaft angle on standard radiographs in patients with complaints of shoulder pain.
Hypothesis |
Shoulder rotation does not affect neck-shaft angle.
Materials and methods |
A prospective study was conducted in selected patients with shoulder pain. Three true anterior-posterior radiographic views were obtained: in neutral rotation, 30° external rotation, and internal rotation with patient's arm in a sling. The X-rays were evaluated by three shoulder and elbow surgeons. Inter- and intra-observer reliability was evaluated by intraclass correlation coefficient (ICC).
Results |
Neck-shaft angle on true AP view did not differ between neutral rotation and 30° external rotation: 132±6° and 130±9°, respectively (P>0.999). In internal rotation with the hand resting on the abdomen, neck-shaft angle was 145±6°: i.e., significantly different (P<0.001) to the other two positions. Intra- and inter-observer correlation demonstrated excellent reliability.
Conclusions |
Radiographic neck-shaft angle was significantly different in internal rotation with the patient's arm in a sling, compared with views in neutral or 30° external rotation. Intra- and inter-observer correlation showed excellent reliability.
Level of evidence |
II, comparative prospective study.
El texto completo de este artículo está disponible en PDF.Keywords : Proximal humerus fracture, Osteotomy, Shoulder anatomy, Shoulder arthroplasty, Shoulder radiography
Esquema
| ☆ | This study was approved by the review board of the Department of Orthopedics and Traumatology/USP (no. 1192). |
Vol 103 - N° 6
P. 865-868 - octobre 2017 Regresar al número
Artículo precedente
- A new approach for endoscopic neurolysis of the suprascapular nerve at the spinoglenoid notch: A preliminary cadaver study
- M.-A. Loirat, M. Tierny, A. Hervé, A. Lignel, E. Berton, M. Ropars, H. Thomazeau, the Orthopedics and Traumatology Society of Western France (SOO)
- Shoulder function in patients with deltoid paralysis and intact rotator cuff
- J.-D. Werthel, J. Bertelli, B.T. Elhassan
Bienvenido a EM-consulte, la referencia de los profesionales de la salud.