Types of Urine Collection
February 15th, 2021
Overview
There are many ways in which a urine sample can be collected. The method of collection depends on the type of test performed, and certain patient factors.
Types of Urine Collection
- Random urine - taken at any time; Used for testing of electrolytes etc.
- Morning urine - the first urine of the day is the most concentrated, increasing the yield; Used for urinalysis, microscopy and beta-HCG testing
- Clean catch / midstream urine - the first few mL are discarded and then urine is collected, removing urethral bacterial flora from the sample; Best for urine culture and sensitivity testing
- 24 hour urine - all of the urine passed over 24 hours is collected; Used to measure certain analytes, such as creatinine, protein, electrolytes, uric acid, cortisol, catecholamines / metanephrines
- Catheterised sample - e.g. from an in and out / indwelling / suprapubic catheter
- Suprapubic aspiration - a needle is used to aspirate urine; May be required if a patient cannot be catheterised, or if sterile urine absolutely must be collected
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