What It Is
Microscopic urinalysis is often done as part of an overall urinalysis. After a
urine (pee) sample is collected, it's put into a centrifuge — a special
machine that separates the liquid in the urine from any solid components that may
be present, such as blood cells, mineral crystals, or microorganisms. Any solid materials
are then viewed under a microscope.
Why It's Done
The results of a microscopic urinalysis may point to a urinary tract infection
(UTI), kidney problems, a metabolic disorder such as diabetes, or a urinary tract
injury. If test results are abnormal, other tests may be needed before a definite
diagnosis can be made.
Preparation
Cleansing the area around the urinary opening is required for the microscopic urinalysis.
Your child might need to temporarily stop taking certain medications that could interfere
with test results.
The Procedure
Your child will be asked to urinate into a clean sample cup in the doctor's office,
in the hospital, or at home. If your child isn't potty trained and can't urinate into
a cup, a catheter (a narrow soft plastic tube) may need to be inserted into the bladder
to obtain the urine specimen.
The skin surrounding the urinary opening has to be cleansed just before the urine
is collected. In this "clean-catch" method, you or your child cleanses the skin around
the urinary opening with a special towelette (this might need to be done more than
once). Your child then urinates, stops momentarily, and then urinates again into the
collection container. Catching the urine in "midstream" is the goal. Be sure to wash
your hands and your child's hands before and after this process. Collecting the specimen
should only take a few minutes.
Occasionally, if the doctor is concerned about a urinary problem that isn't due
to an infection, a urine collection bag with adhesive tape on one end might be used
to collect a sample from an infant. If you're doing the collection at home, you'll
clean your baby's genital area and then arrange the bag around the urinary opening.
Once the bag is in place, you'll secure it with the attached tape. You can put a diaper
on your baby after you've attached the bag. You'll be instructed on how to remove
the bag once your baby has urinated into it, usually within an hour.
If you obtain the specimen at home, follow any storage and transportation instructions
the lab gives you.
