Detrusor instability following colposuspension for urinary stress incontinence.

Sixty-two patients with genuine stress incontinence (group A) and 30 women with combined detrusor instability and genuine stress incontinence (group B) had a colposuspension operation. The proportion with symptoms of detrusor instability was significantly reduced from 24% before operation to 9% after operation in group A and from 73% to 33% in group B. Urodynamically, detrusor instability developed after surgery in 17 of the 62 patients (27%) in group A whereas only 12 of the 30 women (40%) in group B had detrusor instability after surgery. No urodynamic explanation was found to explain the effect of colposuspension in relieving the symptoms of detrusor instability in some and causing them in others. Nevertheless, it is suggested that colposuspension is helpful for most patients with combined detrusor instability and genuine stress incontinence.