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Common UA Tests
Question | Answer |
---|---|
PHYSICAL EVALUATION | Color; Clarity; Specific Gravity |
CHEMICAL EVALUATION | Blood; Bilirubin; Glucose; Ketones; Leukocyte esterase; pH; Protein; Nitrite; Urobilinogen |
Color | Abnormal colors that re clinically significant result from blood melanin, bilirubin, or urobilin in the sample |
Clarity | Turbidity may be the result of chyle, fat, bacteria, RBCs, WBCs, or precipitated crystals |
Specific Gravity | Variation in this indicator of dissolved solids in the urine is normal; inconsistencies suggest renal tubule involvement or ADH deficiency |
Blood | Hematuria ma be the result of hemorrhage, infection, or trauma |
Bilirubin | Aids in differentiating obstructive jaundice from hemolytic jaundice, which will not cause increased bilirubin in the urine |
Glucose | Glucosuria could be the result of diabetes mellitus, renal impairment, or ingestion of a large amount of carbohydrates |
Ketones | Occurs in uncontrolled diabetes mellitus and starvation |
Leukocyte esterase | Certain white cells (neutrophils) in abundance indicate urinary tract infection |
pH | Variations in pH indicate changes in acid - base balance, which is normal; loss of ability to vary pH is indicative of tissue breakdown |
Protein | Proteinuria is an indicator of renal disorder, such as injury and renal tube dysfunction |
Nitrite | Positive result suggests bacterial infection but is only significant on first-morning specimen or urine incubated in bladder for at least 4 hours |
Urobilinogen | Occurs in increased amounts when patient has hepatic problems or hemolytic disorders |
Microscopic Evaluation | Analysis of urinary sedimnet reveals status of the urinary tract, hematuria pyuria, and presence of casts and tissue cells are pathologic indicators |