amount of urine sample needed for urinalysis
A urinalysis test is performed by collecting a urine sample from the patient in a specimen cup. Usually only small amounts (30-60 mLs) may be required for urinalysis testing. The sample can be either analyzed in the medical clinic or sent to a laboratory to perform the tests. Urinalysis is abbreviated UA. Urinalysis (Urine Test) A doctor may simply perform a urine dipstick test in the office. Only a few minutes are needed to obtain results. Your health-care provider may also send a urine sample to the lab for culture testing (see below). These results take a few days to come back. The urine 24-hour volume test measures the amount of urine produced in a day. The amount of creatinine, protein, and other chemicals released into the urine during this period is often tested. For this test, you must urinate into a special bag or container every time you use the bathroom for a 24-hour period. 1  On day 1, urinate into the toilet when you get up in the morning.  Afterwards, collect all urine in a special container for the next 24 hours. THE LIVER CHANGES IT INTO A WATER-SOLUBLE SUBSTANCE CALLED BILIRUBIN. WHEN THERE IS A BLOCKAGE OR DISORDER WITH THE LIVER OR GALL BLADDER DUCTS BILIRUBIN MAY NOT BE ABLE TO GET TO THE SMALL INTESTINE AND CAN CAUSE JAUNDICE. THE BODY WILL TRY TO GET RID OF THE EXTRA BILIRUBIN THROUGH URINE. A urine culture is a test to find and identify germs (usually bacteria) that may be causing a urinary tract infection (UTI). Urine in the bladder normally is sterile-it does not contain any bacteria or other organisms (such as fungi). But bacteria can enter the urethra and cause an infection. A urine sample is kept under conditions that allow bacteria and other organisms to grow. If few or no organisms grow, the test is negative. If organisms grow in numbers large enough to indicate an infection, the culture is positive. 1 After the urine has flowed for several seconds, place the collection container in the stream and collect about 60 mL (2 fl oz) of this midstream urine without stopping the flow. 2  Do not touch the rim of the container to your genital area.  Do not get toilet paper, hair, feces, or menstrual blood in the urine sample. No plastic tubes please. Collect at least 10 ml of urine. We try and standardize the volume of urine used for urinalysis. This is impossible to do if samples ranging from 0.5 ml (way too little to do anything useful with) to 100 ml are collected. In addition, we need a minimum of 10 ml of urine for electrophoresis. The urine protein concentration is very low and we need a minimum amount of protein to perform the electrophoresis. Thirty to 60 mL is the standard amount of urine obtained in a midstream urine specimen. At least 3 mL are required to perform a urine culture. Twenty milliliters are necessary for routine urine studies. Thirty to 60 mL is the standard amount of urine obtained in a midstream urine specimen. At least 3 mL are required to perform a urine culture. Twenty milliliters are necessary for routine urine studies. NON STERILE: LABEL CONTAINER WITH PT NAME, DATE, TIME OF COLLECTION, YOUR INITIALS. STERILE: LABEL CONTAINER WITH PT NAME, DATE, TIME OF COLLECTION, YOUR INITIALS. 24 HOUR URINE JUG: USUALLY HAS A PRESERVATIVE IN THE JUG TO CHECK FOR NA(SODIUM, K(POTASSIUM), CREATININE AND UA(URIC ACID. PUT PT NAME ON JUG. PT SHOULD FILL IN DATE AND TIME STARTED COLLECTING URINE. The normal range for 24-hour urine volume is 800 to 2000 milliliters per day (with a normal fluid intake of about 2 liters per day). The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories.
At least 10 ml