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Biomedical subjects

Yassamin Hazrati

Publications and source records attributed to Yassamin Hazrati.

6 recordsLinked to original sources
PubMed2005

Incidence of early radiolucent glenoid lines in patients having total shoulder replacements.

UNLABELLED: Glenoid loosening is the most common long-term complication occurring after total shoulder replacement. Imprecise cement technique and glenoid preparation may result in early radiolucent glenoid line formation. Early radiolucent lines may indicate inadequate initial fixation, which may contribute to early loosening. Improved cement techniques, refined instrumentation, and glenoid component design all may reduce early radiolucent lines. In our study, postoperative anteroposterior and axillary radiographs were obtained after 68 total shoulder replacements done by one surgeon using either an old free-hand, manual packing technique before November 1998 (n = 28) or a new instrument preparation and pressurization technique since November 1998 (n = 40). Three orthopaedic surgeons blindly reviewed the radiographs for the presence and thickness (mm) of radiolucent lines. The newer instrumented pressurization group had a lower incidence of radiolucent lines than the old manually packed group. In the new subgroup, pegged components had a lower incidence of radiolucent lines than keeled components. The incidence of radiolucent lines seems to be reduced using specially designed instruments, new glenoid designs, and modern cement techniques, which may lead to reduced long-term glenoid loosening. LEVEL OF EVIDENCE: Therapeutic study, Level III-2 (retrospective cohort study). See the Guidelines for Authors for a complete description of levels of evidence.

Adult↗
PubMed2003

Suprascapular nerve entrapment secondary to a lipoma.

Many causes of suprascapular nerve entrapment have been described including a small spinoglenoid notch, a tight ligament, boney spurs, and ganglion cysts. In the current patient, suprascapular nerve entrapment was caused by a lipoma in the suprascapular notch. The patient presented with painful shoulder motion that could have been attributed to rotator cuff and acromioclavicular joint disease. However, magnetic resonance imaging and electromyography were consistent with suprascapular nerve entrapment. Treatment of the rotator cuff disease and excision of the lipoma led to resolution of the patient's symptoms. This case is presented as an unusual cause of suprascapular nerve entrapment with a review of its course and anatomy.

Humans↗
PubMed2002

Failed surgical management of partial thickness rotator cuff tears.

Some authors have recommended that rotator cuff tears <50% of tendon thickness be debrided and those involving >50% of the tendon be treated with miniopen repair. We hypothesize that if indications for selecting between simple debridement and tendon repair were appropriate, then both groups should have comparable outcomes. Thirty-nine patients with partial rotator cuff tears met inclusion criteria and were available for retrospective analysis. Twenty-six percent of patients who underwent debridement and 12.5% of patients who had mini-open repair had unsatisfactory results according to Neer's criteria.

Adult↗
PubMedDate not supplied

Arthroscopic biceps tenodesis.

Surgical treatment of symptomatic pathology of the long head of the biceps tendon generally consists of either biceps tenotomy or tenodesis. Biceps tenodesis is generally recommended for younger patients and has been well described using open techniques. With advancements in arthroscopic ability and equipment, new arthroscopic techniques have recently been reported. These techniques can be especially useful when used in conjunction with other arthroscopic procedures such as distal clavicle resection, rotator cuff repair, and subacromial decompression. We present a modification of the techniques suggested by other researchers. In this technique, a bone anchor is used as a pulley at the bottom of the tunnel to pull the tendon into position. This is followed by interference screw fixation. To our knowledge, this technique has not been previously described.

Arthroscopy↗
PubMedDate not supplied

Loss of subscapularis function after total shoulder replacement: A seldom recognized problem.

Little attention has focused on subscapularis integrity after total shoulder replacement (TSR). We have noted that several patients have loss of internal rotation and subscapularis function on follow-up, leading to our review of success in restoring subscapularis function after TSR. A retrospective review was done of the records of 41 patients after TSR performed between 1995 and 2000. Mean follow-up was 1.9 years. Terminal internal rotation was evaluated by the lift-off and belly-press examinations. Subscapularis function was assessed by the patients' ability to tuck in a shirt. The subscapularis was repaired anatomically in 9 cases and through bone tunnels in 32 patients. Abnormal results were found for 25 of 37 lift-off examinations (67.5%) and 24 of 36 belly-press examinations (66.6%). Of 25 patients with an abnormal lift-off finding, 92% reported reduced subscapularis function (Fisher exact test, P <.01). Despite meticulous attention to subscapularis repair, suboptimal return of function was found on clinical examination and assessment of activities of daily living.

Aged↗