0 the muscle that controls the emptying of the bladder (= the organ where urine is stored):
Most incontinent women have either genuine stress incontinence or detrusor instability.
The bladder fills without an accompanying rise in pressure, due to relaxation of the detrusor muscle in the wall and the elastic properties of the connective tissue.
They are usually performed with filling cystometry which gives information about sensation, bladder capacity, compliance, the presence or absence of detrusor instability and incontinence.
Statistically, there was no significant correlation between the two tests: r = 0.177 and 0.258 for the patients with detrusor instability and stress incontinence, respectively.
Oxybutynin with bladder retraining for detrusor instability in elderly people: a randomised controlled trial.
Contractions of the detrusor muscle can also occur during filling of the bladder which cannot be inhibited.
It is of little value in the management of incontinence due to detrusor instability or sphincter incompetence.
Other causes of bladder overflow obstruction such as urethral stricture and underactive detrusor muscle due to muscular or neurological disease are rarer.
However, detrusor overactivity is present in up to half of continent elderly individuals.
