Uroflowmetry is a test to measure urine flow and assess for bladder outlet obstruction. It is performed by having a patient urinate into a special toilet that measures parameters like voided volume, average flow rate, maximum flow rate, and time to maximum flow. Abnormal results can indicate conditions like benign prostatic hyperplasia, bladder outlet obstruction, or a neurogenic bladder.

1. What is Uroflowmetry ?
Dr. Nabarun Biswas
(FCPS Surgery)
Registrar
Mymensingh Medical College
Hospital

2. Why it is performed?
• BPH
• BOO
• Neurogenic bladder

3. How it is performed ?

4. Parameters
• Voided vol (ml) : 400 – 600 ml > V comp
• Average flow rate (ml/s): 20-25 (m) 25 -35 (F)
>Q ave
• Maximum flow rate (ml/s): 50-60 > Q max
• Time to Maximum flow rate > TQ max
• Voiding time (s): 20-30 >T100
• Flow time (S): TQ

6. Liverpool maximum flow rate
nomogram

7. Normal

8. BPH

9. Stricture

10. Neurogenic bladder