Infla10® Pulse™Also Known As
Cystometrogram (CMG), Bladder pressure test, Filling cystometry, Urodynamic cystometry
Definition
Cystometry is a diagnostic urodynamic procedure that measures bladder pressure and capacity during filling to evaluate bladder function and dysfunction.1 It involves the insertion of a catheter through the urethra into the bladder, allowing for the controlled infusion of fluid while simultaneously recording intravesical pressure changes.2 The test provides critical information about detrusor muscle activity, bladder compliance, capacity, and sensation during the filling phase.3 Cystometry helps healthcare providers assess the relationship between bladder pressure, volume, and the patient’s subjective sensations, offering insights into neurological control of micturition and potential abnormalities in bladder storage and emptying functions.1 2
Clinical Context
Cystometry is a key component of comprehensive urodynamic testing used to evaluate patients with lower urinary tract symptoms (LUTS).1 It is particularly valuable in diagnosing and characterizing conditions such as neurogenic bladder dysfunction, detrusor overactivity, stress urinary incontinence, and bladder outlet obstruction.2
The procedure is indicated for patients with complex or refractory urinary symptoms, including those with neurological conditions affecting bladder function (multiple sclerosis, spinal cord injury, diabetes with neuropathy), persistent urinary incontinence despite conservative management, recurrent urinary tract infections, and unexplained voiding difficulties.1 3
During the procedure, the patient is positioned comfortably, and a catheter is inserted transurethrally into the bladder. A second catheter or pressure probe may be placed in the rectum or vagina to measure abdominal pressure.2 The bladder is gradually filled with sterile fluid at a controlled rate while pressure measurements are recorded. The patient reports sensations experienced during filling (first desire to void, strong desire, urgency), and these are correlated with corresponding bladder volumes and pressures.1 2
Cystometry helps differentiate between various causes of bladder dysfunction, such as distinguishing between poor detrusor contractility and bladder outlet obstruction in patients with weak urinary flow.3 The results guide treatment decisions, including medication selection, pelvic floor therapy recommendations, or surgical interventions when appropriate.1