Urine flow rate
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| Parameter | Value |
|---|---|
| renal blood flow | RBF=1000 ml/min |
| hematocrit | HCT=40% |
| renal plasma flow | RPF=600 ml/min |
| filtration fraction | FF=20% |
| glomerular filtration rate | GFR=120 ml/min |
| urine flow rate | V=1 mL/min |
| Sodium | Inulin | Creatinine | PAH |
|---|---|---|---|
| SNa=150 mEq/L | SIn=1 mg/mL | SCr=0.01 mg/ml | SPAH= |
| UNa=710 mEq/L | UIn=150 mg/mL | UCr=1.25 mg/mL | UPAH= |
| CNa=5 mL/min | CIn=150 ml/min | CCr=125 mL/min | CPAH=420 ml/min |
| ER=90% | |||
| ERPF=540 ml/min | |||
Urine flow rate (or urinary flow rate) is a measure of the quantity of urine excreted in a specified period of time. Common periods of time used include "minute" and "seconds."
The letters "V" (for volume) and "Q" are both used as a symbol for urine flow rate.
It can be estimated by uroflowmetry (or "uroflow"), which is performed by urinating into a special urinal or toilet that has a measuring device.[1] The average rate changes with age.[1]
Clinical Usage
Changes in the Urine Flow Rate can be indicative of kidney or other renal disorders. Similarly, by measuring urine flow rate, it is possible to calculate the clearance of metabolites that are used as clinical markers for disease.
See also
- Urodynamics
References
- ↑ 1.0 1.1 "MedlinePlus Medical Encyclopedia: Uroflowmetry". From MedlinePlus, a service by the National Institutes of Health. Updated by: David C. Dugdale. Also reviewed by David Zieve. Update Date: 9/3/2010. Retrieved 2012-10-03.
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