Histological Changes in Biceps Muscle after Tenotomizing the Biceps Long Head in a Rat Model

BACKGROUND: Popeye deformity is common after rupture of the biceps muscle's long head tendon. Herein, we report on histological changes in biceps brachii muscles following tenotomy of the long head biceps tendon. METHODS: Twelve Sprague-Dawley rats (12-week-old) underwent tenotomy of the long head biceps tendon in the right shoulder. At postoperative weeks 4, 7, and 10, the operative shoulders were removed by detaching the biceps brachii muscle from the glenoid scapula and humerus; the opposite shoulders were removed as controls. H&E staining was performed to elucidate histological changes in myocytes. Oil-red O staining was performed to determine fatty infiltration. Myostatin antibody immunohistochemistry staining was performed as myostatin is expressed by skeletal muscle cells during myogenesis. RESULTS: H&E staining results revealed no changes in muscle cell nuclei. There were no adipocytes detected. Compared with that of the control biceps, the cross-sectional area of the long head biceps was significantly smaller (p=0.00). Statistical changes in the total extent of the 100 muscle cells were significant (p=0.00). Oil-red O staining revealed no fatty infiltration. Myostatin antibody immunohistochemical staining revealed no significant difference between the two sides. CONCLUSIONS: Muscular changes after tenotomy of the long head biceps included a decrease in the size of the individual muscle cells and in relative muscle mass. There were no changes observed in muscle cell nuclei and no fatty infiltration. Moreover, there were no changes detected by myostatin antibody immunohistochemistry assay.

The Effects of Simultaneous Vaginal Hysterectomy on the Outcomes of a Tension-free Vaginal Tape Procedure for Female Stress Urinary Incontinence / 대한비뇨기과학회지

PURPOSE: Hysterectomy, regardless of the surgical technique, increases the risk of having to undergo stress urinary incontinence surgery later in life. Furthermore, transvaginal hysterectomy may cause some changes in the normal architecture and tension of the tissues surrounding the pelvic floor, and this may also cause some changes in the continence mechanisms of the bladder and urethra. We investigated if there are any adverse effects of concomitant vaginal hysterectomy on the outcomes of a tension-free vaginal tape procedure. MATERIALS AND METHODS: The outcomes of the tension-free vaginal tape (TVT)/transvaginal total hysterectomy(VTH) group were compared with that of the TVT group in terms of cure and improvement of incontinence, satisfaction with the procedure and the complications. The preoperative evaluation included history taking, physical examination and stress tests and determining the stress-related leakage, the emptying ability, the anatomy, the protection and the inhibition(SEAPI) scores. The outcomes were evaluated at over one year after operation. RESULTS: The cure and improvement rates were 77.5% and 15% in the TVT group, and 88.9% and 7.4% in the TVT/VTH group, respectively, without any statistical difference between the two groups. The rates of patient- satisfaction with the procedure were similar in two groups. There were no serious or long term complications related to the procedure except for a case of local hematoma in the hysterectomy site, which was controlled conservatively. CONCLUSIONS: Our findings suggest that a TVT operation can be done simultaneously with vaginal hysterectomy with similar results as those of TVT operation only. In addition, it is thought that the simultaneous TVT operation in a patient who is undergoing hysterectomy and has urinary stress incontinence deserves to be recommended in a positive light