KLES Kidney Foundation

Urodynamics :

This is a branch of urology which deals with the dynamic study of the bladder. It consists of uroflow and pressure flow studies.

Uroflow is a voiding study which measures the velocity of the voided urine as a function of voided volume and compares it with a series of nomograms. This tells the urologist whether the person is having obstruction or not during voiding.

Pressure Flow
This is a more detail study of the bladder. This is carried after inserting pressure transducers in the bladder and rectum to measure pressures and a filling line in the bladder. In this study, the urologist finds out how the bladder behaves to different volumes of filling.
The study is in two phases the filling phase and voiding phase and the parameters studied are bladder volume, sensations, detrusor compliances and stability during filling phase and detrusor contraditiy and evidence of obstruction during voiding.
By compiling this test with EMG we can find detrusor ext. sphincter dysynergia. This pressure flow test is done in patients with prostatic enlargement, neurological problems spinal injuries, incontinence patients.