Arthritis of the glenohumeral joint accompanied by an irreparable tear of the rotator cuff can cause severe pain, disability and loss of function, particularly in the elderly population. Anatomical shoulder arthroplasty requires a functioning rotator cuff, however, reverse shoulder arthroplasty is capable of addressing both rotator cuff disorders and glenohumeral deficiencies. The Aequalis Reversed Shoulder Prosthesis design is based on two bio-mechanical principles by Grammont; a medialized center of rotation located inside the glenoid bone surface and second, a 155 degree angle of inclination. Combined, they increase the deltoid lever arm by distalizing the humerus and make the prosthesis inherently stable. 24 consecutive primary reverse total shoulder arthroplasties were performed by a single surgeon for arthritis with rotator cuff compromise and 1 as a revision for a failed primary total shoulder replacement between December 2009 and October 2012. Patients were assessed postoperatively with the use of the DASH score, Oxford shoulder score, range of shoulder motion and plain radiography with Sirveaux score for scapular notching. Mean age at the time of surgery was 72.5 years (range 59 to 86). Average follow up time was 19.4 months (range 4 to 38). Functional outcome scores from our series were comparable with patients from other follow up studies of similar prosthesis design. All patients showed improvement in range of shoulder movement postoperatively. Complications included one dislocation, one acromion fracture and one humeral shaft fracture. No cases of deep infection were recorded. Overall, the short-term clinical results were promising for this series of patients and indicate reverse shoulder arthroplasty as an appropriate treatment for this group of patients.
Magnetic resonance imaging (MRI) continues to become more widely accessible as an investigation, with an increasing number of scans being performed in the outpatient setting for suspected shoulder pathology. We performed a retrospective review of all shoulder MRI scans performed in an orthopaedic outpatient setting in a district general hospital between October 2010 and October 2011. We also reviewed the medical notes for these patients. 75 MRI Shoulder scans were performed on 74 patients. In 5 cases (7%), no other form of imaging was performed prior to MRI scan. 11 patients (15%) had no provisional diagnosis included in the referral. The nature of referral, indication for MRI and subsequent management of these patients was also examined. Our findings may support the use of guidelines for requesting MRI scans of the shoulder in outpatients.
