ENGLISH ABSTRACT
JOURNAL ARTICLE
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[Results of arthroscopic subacromial decompression in 50-year-old patients].

PURPOSE OF THE STUDY: The study presents results of the surgical treatment of subacromial impingement syndrome in patients between fifty and sixty years of age using the technique of a two-step arthroscopic subacromial decompression.

MATERIAL: Arthroscopic subacromial decompression was used for the operation on 12 shoulders in 12 patients. All of them underwent minimally half a year of conservative treatment. The average age of patients at the time of operation was 51 years. The youngest was 43 years, the remaining patients were older than 49 years. Only in 4 patients the subacromial impingement was not associated with another diagnosis. The group included also 2 patients with an associated diagnosis which resulted in the failure of arthroscopic technique. The follow-up ranges between 6 to 22 months.

METHODS: The applied technique of arthroscopics subacromial decompression has two phases. Distal acromioplasty uses the dorsal edge of the acromion as a cutting block necessary for smoothing its inferior surface: By anterior acromioplasty was removed the anterior part of lateral clavicle prominent to the anterior edge of acromion. Part of the technique is resection of the accessible portion of the coracoacromial ligament. The difference between systolic pressure of the patient and the pressure in the subacromial space above 50 mm Hg significantly reduces bleeding. The precision of the technique is supported by a careful preoperative planning of the extent of resection on special x-ray projections. Strict observation of the schedule of postoperative physiotherapy is a necessary precondition of a successful result. The result of arthroscopic subacromial decompression is evaluated on the basis of UCLA score which allows comparison with the groups of patients of other authors.

RESULTS: Using UCLA score the group of patients operated on included 3 excellent, 4 good, 3 satisfactory and 2 poor results. The first failure was recorded in a 50-year old man with a finding of a massive rupture of the rotator cuff and with an associated diagnosis of the fracture of clavicle healed in dislocation. After 6 months open acromioplasty and reconstruction of the rotator cuff was performed in this patient. Another poor result was recorded in a 57-year old female patient with an associated diagnosis of tendinitis calcarea of m. supraspinatus which was caused by the failure to remove calcification and insufficient extent of the resection of acromion. After the interval of 3 months also here open acromioplasty was performed. Ten out of twelve patients are satisfied and do not require another treatment. It means that also three satisfactory results (according to UCLA score) mean a marked pain relief and improvement of the function of the shoulder of not very active 50-year old individuals.

DISCUSSION: Other authors report the frequency of good and excellent results they achieved in the range of 73-94%. Objectively evaluated arthroscopic subacromial decompression in our group of patients is not so successful as the operation performed in younger age groups. However, the subjective evaluation of the operation is very favourable. This satisfaction results from realistic expectations of patients who were not active sportsmen. In young patients active in sport with a primary subacromial impingement syndrome the arthroscopic method is a gold standard method. It is a mistake not to indicate the reconstruction of the ruptured rotator cuff in active patients under the age of 50. In the sixth decade, however, no outstanding results can be expected of it. Therefore in this group a precisely performed arthroscopic subacromial decompression has a very favourable effect mainly due to a shorter time of physiotherapy.

CONCLUSION: The success of arthroscopic subacromial decompression is conditioned by a careful indication of the type of surgery, preoperative planning, precise technique of the actual operation and a strict observation of individual steps of postoperative physiotherapy of the shoulder. The operation may significantly relieve the pain and improve the function of the shoulder and at the same time it does not weaken the acromial origin of the m. deltoideus. It reduces the time of recovery and reduces also the risk of arthrofibrosis which endangers mainly older less active patients.

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