Which of the following conditions is a cause for specimen rejection for a routine urinalysis

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The order of blood flow through the nephron is:
A) afferent arteriole, peritbular capillaries, vasa recta, efferent arteriole
B) efferent arteriole, peritbular capillaries, vasa recta, afferent arteriole
C) peritbular capillaries, vasa recta, afferent arteriole, efferent arteriole
D) afferent arteriole, efferent arteriole, peritubular capillaries, vasa recta

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Which of the following would be a cause for specimen rejection?

The most common reasons for specimen rejection were contamination (n=764, 35.1%), inappropriate collection container/tube (n=330, 15.2%), quantity not sufficient (QNS) (n=329, 15.1%), labeling errors (n=321, 14.7%), hemolyzed specimen (n=205, 9.4%), and clotted specimen (n=203, 9.3%).

What are the common cause of errors in urinalysis?

Hemoglobinuria, myoglobinuria, menstrual blood, concentrated urine, and strenuous exercise can cause a false-positive result on a dipstick test (4).

What are the criteria for specimen rejection in microbiological examinations?

​Rejection Criteria of Clinical Microbiology Specimens.
Duplicate specimen collected within 5 days..
Improper specimen received..
Insufficient quantity for analysis..
Plasma NOT separated from whole blood within 24 hours..
Specimen received greater than 24 hours from time of collection..

What does a rejected specimen mean?

Rejected Specimen. --A specimen that is judged by the laboratory to be unsuitable for analysis or must be recollected (eg, specimen lost or not received, inadequately labeled or unlabeled, hemolyzed, clotted, of insufficient quantity, or of unacceptable variance with previous or expected results).