Urinalysis & Body Fluids Questions & Answers 100% Veified

Urinalysis & Body Fluids Questions & Answers 100% Veified After receiving a 24 hour urine for quantitative total protein analysis, the technician must first: A. subculture the urine for bacteria B. add the appropriate preservative C. screen for albumin using a dipstick D. measure the total volume - ANSWERSmeasure the total volume False results in urobilinogen testing may occur if the urine specimen is: A. exposed to light B. adjusted to a neutral pH C. cooled to room temperature D. collected in a nonsterile container - ANSWERSexposed to light A clean-catch urine is submitted to the laboratory for routine urinalysis and culture. The routine urinalysis is done first, and 3 hours later, the specimen is sent to the microbiology department for culture. The specimen should: A. be centrifuged, and the supernatant cultured B. be rejected due to time delay C. not be cultured if no bacteria are seen D. be processed for culture only if the nitrate is positive - ANSWERSbe rejected due to the time delay Which of the following urine results is most apt to be changed by proloinged exposure to light? A. pH B. protein C. ketones D. bilirubin - ANSWERSbilirubin Urine samples should be examined within 1 hour of voiding because: A. RBCs, leukocytes and casts agglutinate on standing for several hours at room temperature B. urobilinogen increases and bilirubin decreases after prolonged exposure to light C. bacterial contamination will cause alkalinization of the urine D. ketones will increase due to bacterial and cellular metabolism - ANSWERSbacterial contamination will cause alkalinization of the urine A urine speciment comes to the laboratory 7 hours after it is obtained. It is acceptable for culture only if the specimen has been stored: A. at room temperature B. at 4-7 degrees C C. frozen D. with a preservative additive - ANSWERS4-7*C Which of the following would be affected by allowing a urine specimen to remain at room temperature for 3 hours before analysis? A. occult blood B. specific gravity C. pH D. protein - ANSWERSpH Failure to observe RBC casts in a urine specimen can be caused by: A. staining the specimen B. centrifuging an unmixed specimen C. mixing the sediment after decantation D. examining the sediment first under low power - ANSWERScentrifuging an unmixed specimen The creatinine clearance is reported in: A. mg/dL B. mg/24 hours C. mL/min D. mL/24 hours - ANSWERSmL/min M