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HelpTest ID RUA Urinalysis, Complete, Includes Microscopic
Secondary ID
9308Useful For
Screening for urinary tract diseases and some nonrenal diseases
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| SRC3 | Source | No | Yes |
| APP4 | Appearance | No | Yes |
| UOSMU | Osmolality, U | Yes | Yes |
| PHU_ | pH, U | Yes | Yes |
| GLUC | Glucose | Yes, (Order RGLUR) | Yes |
| PRO5 | Protein | Yes, (Order RPTU) | Yes |
| PR_OS | Protein/Osmolality | No | Yes |
| P24HP | Predicted 24 Hr Protein | No | Yes |
| P_RGE | Predicted Range | No | Yes |
| UBIL | Bilirubin | Yes, (Order UBILU) | No |
| HGBQL | Hemoglobin, QL | Yes, (Order HGB_Q) | Yes |
| UREDU | Reducing Substance, U | Yes, (Internally only) | No |
| CMT51 | Comment | No | Yes |
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| MICA | Microscopic Automated | No | No |
| MICM | Microscopic Manual | No | No |
Testing Algorithm
When this test is ordered, either automated or manual microscopic examination will always be performed at no additional charge.
Method Name
UOSMU: Freezing Point Depression
PHU_: pH Meter
GLUC: Glucose Hexokinase
PRO5: Dye Binding (Pyrogallol Red)
UBIL: Ictotest
HGBQL: Dipstick
UREDU: Clinitest
MICA, MICM: Microscopic
Reporting Name
Urinalysis Complete w/ MicroscopicSpecimen Type
UrineContainer/Tube: Plastic urine container
Specimen Volume: 20 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative.
Specimen Minimum Volume
4 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated | 72 hours |
Clinical Information
The kidney plays a key role in the excretion of by-products of cellular metabolism and regulation of water, acid-base, and electrolyte balance. Urine is produced by filtration of plasma in the renal glomeruli, followed by tubular secretion and/or reabsorption of water and other compounds.
Abnormalities detected by urinalysis may reflect either urinary tract diseases (eg, infection, glomerulonephritis, loss of concentrating capacity) or extrarenal disease processes (eg, glucosuria in diabetes, proteinuria in monoclonal gammopathies, bilirubinuria in liver disease).
Reference Values
Descriptive report
Cautions
Glucose:
-Urine glucose monitoring for the management of diabetes mellitus has essentially been replaced by more accurate and reliable fingerstick blood glucose determination. Also, as a screening test for diabetes mellitus, urine glucose testing has a low sensitivity (though reasonably good specificity).
-Drugs: No interference was found at therapeutic concentrations using common drug panels.
-Normal neonatal infants during the first 10 to 14 days of life may excrete urine giving a positive reaction due to glucose, galactose, lactose, and fructose.(2) The hexokinase method on the chemistry analyzer is specific for glucose only.
Ketones:
-Substances causing false-positive results are bromsulphalein, phenolsulfonphthalein, phenylketone, cephalosporin, aldose-reductive antienzyme, and L-Dopa.
-Fasting or starvation diets may cause positive results.
Hemoglobin:
-Elevated specific gravity, elevated protein, and large amounts of ascorbic acid may cause false-negative results.
-Oxidizing substances such as hypochlorite and chlorine may cause false-positive results.
-The test is equally sensitive to hemoglobin and myoglobin. The presence of hemoglobin, in the absence of RBCs, is consistent with intravascular hemolysis. RBCs may be missed if lysis occurred prior to analysis; the absence of RBCs should be confirmed by examining a fresh specimen. The presence of myoglobin may be confirmed by MYGLU / Myoglobin, Urine.
Protein:
-False-positive results may be obtained with highly buffered, alkaline urines and large amounts of hematuria.
-Contamination of the urine specimen with quaternary ammonium compounds (eg, from some antiseptics and detergents) or with skin cleansers containing chlorhexidine also may produce false-positive results.
-Microalbumin tests are necessary to pick up early increases in urine protein excretion.
Reducing Substances:
-This test reacts with sufficient quantities of any reducing substance in the urine; it is not specific for glucose.
-Low specific gravity urines containing glucose may give slightly elevated results.
-Metabolites of some sulfa drugs and methapyrilene compounds may interfere with the sensitivity of the test.
-X-ray contrast media in urine produces reduced and false-negative glucose results.
Day(s) Performed
Monday through Sunday; Continuously
Report Available
1 dayPerforming Laboratory
Mayo Medical Laboratories in Rochester
Test Classification
This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
81001