British journal of obstetrics and gynaecology · 1993
Denervation and re-innervation of the urethral sphincter in the aetiology of genuine stress incontinence: an electromyographic study.
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Barnick C G, Cardozo L D
Аннотация
OBJECTIVE: To investigate the role of altered innervation of the urethral sphincter in the genesis of genuine stress incontinence.
DESIGN: Prospective observational study.
SETTING: Tertiary referral centre urodynamics unit.
SUBJECTS: Sixty-eight women, 33 with urodynamically proven pure genuine stress incontinence and 35 controls without urinary symptoms.
INTERVENTIONS: Concentric needle electromyography of the urethral striated sphincter.
MAIN OUTCOME MEASURES: The means of motor unit potential duration, number of changes in polarity and the amplitude of individual motor unit potentials were compared between the two groups.
RESULTS: There was no statistically significant difference in motor unit potential duration (P = 0.87) or in the number of changes in polarity (P = 0.85). There was a trend towards a higher amplitude of motor unit potentials in the control group (P = 0.07).
CONCLUSIONS: Our findings suggest that denervation and re-innervation of the striated urethral sphincter following trauma to the pelvic floor, such as that occurring during childbirth, is not a major aetiological factor in the development of genuine stress incontinence.
DESIGN: Prospective observational study.
SETTING: Tertiary referral centre urodynamics unit.
SUBJECTS: Sixty-eight women, 33 with urodynamically proven pure genuine stress incontinence and 35 controls without urinary symptoms.
INTERVENTIONS: Concentric needle electromyography of the urethral striated sphincter.
MAIN OUTCOME MEASURES: The means of motor unit potential duration, number of changes in polarity and the amplitude of individual motor unit potentials were compared between the two groups.
RESULTS: There was no statistically significant difference in motor unit potential duration (P = 0.87) or in the number of changes in polarity (P = 0.85). There was a trend towards a higher amplitude of motor unit potentials in the control group (P = 0.07).
CONCLUSIONS: Our findings suggest that denervation and re-innervation of the striated urethral sphincter following trauma to the pelvic floor, such as that occurring during childbirth, is not a major aetiological factor in the development of genuine stress incontinence.