In healthy men and women, urine does not contain any blood that can be seen with the eye, called "gross blood," nor does it contain red blood cells that can be discovered with the aid of a microscope. The discovery of either gross or microscopic blood in urine is a sure indication of the need to examine and evaluate the patient to discover the cause of this abnormality. The conditions that can lead to either gross or microscopic blood in the urine are many and varied. In adults, a careful history to describe the details of the bloody urine, a physical examination and laboratory studies are the first step in unearthing the cause. Imaging with x-rays, ultrasound, CAT/MRI scans are the next step and will usually discover the cause. In adult women, infection of the bladder or kidneys, urinary stones, and tumors of the urinary bladder, kidneys are the most common causes. In adult men, enlargement and/or infection of the prostate, bladder infection and...
Urine collection - clean catch; Clean catch urine specimen
Normal values will depend on the specific test ordered, for example, whether you've had a urinalysis or urine culture.
What abnormal results mean
If the urine sample was sent for urinalysis, abnormal results may indicate the presence of white blood cells, red blood cells, or excessive amounts of protein.
If the urine sample was sent for urine culture, abnormal results may indicate excessive growth of bacteria, a urinary tract infection , or a bladder infection.
Definition The RBC urine test measures the number of red blood cells in a urine sample. Alternative Names Red blood cells in urine; Hematuria test; Urine - red blood cells How the test is performed A clean-catch urine sample is needed. To obtain a sample, boys and men should wipe the head of the penis clean. Girls and women need to wipe between the vaginal "lips" (labia) with soapy water and rinse well. Your doctor may give you a special clean-catch kit that contains a cleansing solution and sterile wipes. Urinate a small amount into the toilet bowl to clear the urethra of any contaminants. Then, collect a sample of urine in a clean or sterile container. About 1 - 2 ounces of urine is needed for a test. Remove the container from the urine stream without stopping the flow. You may finish urinating into the toilet bowl. Take the sample to the lab. For infants, the genital area is cleaned and dried, and then a collection device is attached to collect the urine. If you are asked to collect the ur...
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