What makes a urine test invalid?

Invalid result: Refers to the result reported by a laboratory for a urine specimen that contains an unidentified adulterant, contains an unidentified interfering substance, has an abnormal physical characteristic, or has an endogenous substance at an abnormal concentration that prevents the laboratory from completing …

How long is urine good unrefrigerated?

Storing a urine sample Do not keep it for longer than 24 hours. The bacteria in the urine sample can multiply if it is not kept in a fridge. If this happens, it could affect the test results.

What do urine tests show?

A urinalysis is used to detect and manage a wide range of disorders, such as urinary tract infections, kidney disease and diabetes. A urinalysis involves checking the appearance, concentration and content of urine. Abnormal urinalysis results may point to a disease or illness.

Can you retake an invalid drug test?

Retesting can be an option if there is a possibility of a laboratory error or an insufficient sample. The lab and the Medical Review Officer (MRO) will request a retest. The donor can also request a retest if the request is made within three days of the results being made available.

What should the temperature of a urine test Cup be?

A urine test cup usually contains a temperature strip, which is built in to detect abnormalities in the specimen. Temperature strips for urine testing can also be applied separately by a Third Party Collector (TPA). An acceptable urine temperature for drug test analysis falls between the range of 32–38 °C (90–100 °F).

What happens if the temperature of urine is outside the range?

If the temperature of a urine specimen is outside the range of 90 °F to 100 °F (32 °C to 38 °C), that is a reason to believe the donor may have altered or substituted the specimen.

How are the values of a urine test determined?

A patient’s urine test values should be interpreted based on the reference value of the laboratory in which the test was done; the laboratory typically provides these values with the test result. These values are listed in alphabetical order in the following table.

How long does it take for urine to drop in temperature?

Urine will rapidly drop in temperature once it has left the body and will be in the right temperature range for approximately four minutes – see below. Why is it important to keep urine at body temperature? If you want to pass either a friend’s urine or a synthetic urine sample off as your own, you have to be able to accurately keep pee warm.