[ARTHROPLASTY OF THE SHOULDER JOINT IN DISLOCATION-FRACTURES].
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In this case report the authors present the 74 year old female patient with multifragmental fracture of the proximal humerus, treated with the hemiarthroplasty of the humeral joint. The clinical and radiological outcome was satisfactory.
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Dislocation of the shoulder with ipsilateral shaft fracture is an uncommon, but serious injury. I present one case report and the guidelines used for treatment. The method employed was Hackethal's pins through open reduction. The dislocation was reduced during surgery. The fracture and dislocation healed without any problems, and there was no damage to the radial nerve. After a recent follow-up, the patient was allowed to return to work without restrictions, and he has regained normal mobility.
Dislocation of the shoulder is a common injury and may be associated with a variety of complications. We report six cases of primary replacement of the humeral head where closed reduction of a shoulder dislocation associated with an undisplaced fracture of the humeral neck led to displacement of the neck fracture. All dislocations examined were anterior with a displaced greater tubercle fracture. The patients had undergone closed reduction at other medical centres and were referred to us because of iatrogenically displaced fracture-dislocations of the shoulder. Three were women and three were men with a mean age of 52.8 years (range 38-72). Primary replacement of the humeral head was done in an average of 9.3 days (range 2-30 days) following the injury. The average follow-up period was 30.2 months (range 12-55 months). Postoperative pain, active range of motion and function were evaluated with the American Shoulder and Elbow Surgeons Criteria. The forward flexion averaged 124 degrees, active external rotation averaged 29 degrees and internal rotation (achieved movement) to the second lumbar vertebra. Because of the high risk of avascular necrosis and severe collapse of the humeral head, we conclude that the primary replacement of the humeral head is the superior treatment option in iatrogenically displaced fracture dislocations of the shoulder.
We report seven cases in which open or closed reduction of a shoulder dislocation associated with a fracture of the humeral neck led to displacement of the neck fracture. Avascular necrosis of the humeral head developed in all six patients with anatomical neck fractures. All five anterior dislocations also had a fracture of the greater tuberosity and both posterior dislocations had a fracture of the lesser tuberosity. The neck fracture had not initially been recognised in three of the seven cases. In five cases attempted shoulder reduction led to complete displacement of the head segment, which was treated by open reduction and minimal internal fixation. In the other two cases, shoulder reduction caused only mild to moderate displacement which was accepted and the fracture was treated conservatively. We conclude that biplane radiography is essential before reduction of a shoulder dislocation. Neck fractures must always be ruled out, especially where there are tuberosity fractures. In our series, careful closed reduction under general anaesthesia with optimal relaxation and fluoroscopic control did not prevent iatrogenic displacement. Prophylactic stabilisation of the neck fracture should be considered before reduction of such a fracture-dislocation. It may be, however, that the prevention of displacement by prophylactic stabilisation does not always prevent late avascular necrosis; we observed this in one case.
IMPLICATIONS: A patient presented for surgery to repair a fractured left shoulder and elbow and requested regional anesthesia. Most upper extremity operations require a single brachial plexus nerve block. The position of the two fractures however required the use of two separate approaches, an interscalene and an axillary approach.
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Proximal humerus fractures are common in the older population. These fractures can be associated with dislocation of the shoulder. Four-part fracture-dislocations and head-splitting 3-part fractures are generally indicated for shoulder hemiarthroplasty in the older population. When such surgery is warranted, inspection of the glenoid during the procedure is indicated, as loss of evaluation may lead to postoperative shoulder instability. There is value in alerting orthopedic surgeons to the possibility of anterior glenoid rim fracture in association with proximal shoulder fracture-dislocation. We focus on this issue and advise that the lesion can be visualized and confirmed at open reconstruction and does not need multiple radiographic views.
In the treatment of fractures of the humeral head, prosthetic replacement today is accepted as part of the therapeutic repertoire. The indication for this procedure is given if alternative conservative or operative techniques of preserving the humeral head in hemiarthroplasty of the shoulder joint led to universally poor outcomes. The models of endoprostheses that are currently available on the market mainly differ in the stem fixation method and means of securing the tuberosities and rotator cuff. Functional outcome of hemiarthroplasty of the shoulder joint after trauma is less than satisfactory regardless of the type of implant. However, a stable, painless joint is obtained yielding satisfactory subjective patient outcomes. For correct indications for prosthetic replacement of a fractured humeral head the surgeon also has to know the results that can be achieved by other methods in a given situation.
We evaluated the functional outcome 3 (2-12) years after arthroplasty in 29 proximal humerus fractures. The patients' average age at the time of surgery was 71 (47-87) years. The follow-up included a full clinical examination by an independent observer, a questionnaire concerning activities of daily living and pain, and radiographs. The shoulders had a marked reduction of performance, with a Constant score mean of 38 (16-69). All patients were able to eat with utensils, 10 could comb their hair, 19 managed to wash the contralateral armpit, 3 could reach the back pocket and 12 were able to take care of the perineal area. On the VAS-scale (0-100 mm), pain at rest was mean 21 (0-53) mm and on motion 47 (0-91) mm. The patients were stratified regarding surgical treatment within 3 weeks (18 acute vs. 11 late) and prosthetic design (14 Neer II vs. 14 Global modular) without significant differences, as assessed by the Constant scores. We conclude that the treatment of severe proximal humerus fractures with a prosthesis does not give complete pain relief and results in impaired shoulder function.
A case of bilateral anterior fracture dislocation of the shoulders is reported. Treatment included an open reduction and internal fixation on the right side and a Neer hemiarthroplasty on the left. The probable cause of injury was trauma, although a convulsive episode cannot be ruled out. Bilateral biceps tendon interposition was also seen in this case.
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Four cases of brachial plexus lesions caused by anterior fracture-dislocation of the shoulder are reported. The incidence, mechanism of injury and prognosis are reviewed.
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