Contamination is thought to be a significant problem. Depending on which study you look at, the rates of urine contamination can be 17% or upwards. The standard method of midstream urine collection is for the healthcare professional to give the patient some sort of pot in which to collect their urine. Often, the pot is just given to the patient and they’re told to produce a urine sample. However, what should happen is that the patient should be asked to produce the midstream urine. In other words, not to collect the first bit of urine that comes out and not to wait until the very end, but to collect the bit in the middle.

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