detrusor instability


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Related to detrusor instability: neurogenic bladder

instability

 [in-stah-bil´ĭ-te]
lack of constancy; excessive likelihood of change.
detrusor instability the occurrence during bladder filling of contractions that compromise capacity or produce urinary leakage.

de·tru·sor in·sta·bil·i·ty

uninhibitable bladder contractions that typically occur at bladder volumes below capacity.

detrusor instability

A physiological mechanism in which contractions of the muscles of the urinary bladder during the filling phase of a urodynamic study or during coughing, sneezing, or other activities result in an increase of intra-abdominal pressures. Such a pressure increase may lead to urinary urges or to urinary incontinence, esp. in women. Some experts believe that detrusor instability is the most common cause of urinary incontinence in older adults. Underlying causes include urethral obstruction, cystitis, bladder carcinoma, stroke, Parkinson's disease, and multiple sclerosis. Synonym: detrusor hyperactivity with impaired contractility; detrusor overactivity;
See also: instability

detrusor instability

Involuntary contractions of the bladder muscle causing an undesired escape of urine. This is one of the most important causes of incontinence, being, in women, second only to incompetence of the urethral sphincter. The condition is often associated with excessive thickness of the muscular bladder wall.
References in periodicals archive ?
Urodynamic differentiation of detrusor instability and detrusor hyperreflexia.
Trospium chloride in patients with motor urge syndrome (detrusor instability): a double-blind, randomized, multicentre, placebo-controlled study.
Out of total 50 patients taken in the study group, urodynamic study confirmed 13 patients (26%) having stress incontinence, 18 patients (36%) having urge incontinence (detrusor instability), 6 patients (12%) having obstruction and 5 patients (10%) having neurogenic cause.
Transcutaneous electric nerve stimulation and temporary S3 neuromodulations in idiopathic detrusor instability. Urol 1996;155;2005-11.
When there is no neuropathic cause for detrusor overactivity it is usually referred to as detrusor instability. When urodynamics testing is done, involuntary detrusor contractions are usually clearly seen during bladder filling.
The aim of this study was to test the efficacy of oxybutynin in elderly ambulant patients with detrusor instability.
Two subjects who did not respond had detrusor instability diagnosed in pretreatment urodynamics.
Effect of transurethral resection of the prostate on detrusor instability and urge incontinence in elderly males.
Reports of transient urinary retention or de novo detrusor instability have been rare.
Three main categories with different symptom patterns have been identified, namely uninhibited overactive bladder (UOB), characterized by impaired perception of bladder fullness and loss of voluntary inhibition of micturition contractions, phasic detrusor instability (PDI), with spontaneous or provoked abortive detrusor contractions during the bladder filling phase, and spinal detrusor hyperreflexia (SDH), following spinal upper motor neuron lesions with impaired voluntary command and unco-ordinated micturition reflexes.
Careful history and a physical to rule out detrusor instability preoperatively are important.
One review of short-term complication rates found bladder perforations in an average of 5% of cases (ranging up to 23%), de novo detrusor instability in 5% (ranging up to 2 1%), and hematoma in 1% (ranging up to 4%).