Difficulty: Medium

Average Score: 50%

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

Rationale

Urine specimen temperature is 23° C (73.4° F).

A routine urinalysis requires that the urine specimen be collected and maintained within a specific temperature range to ensure accurate analysis. A temperature of 23° C is outside the acceptable range and can compromise the integrity of the results.

A (Urine specimen volume is 6 mL.) YOUR ANSWER

The minimum volume required for a routine urinalysis is typically around 10 mL, but 6 mL is often enough for certain tests, depending on the laboratory's protocols. Therefore, a specimen volume of 6 mL alone does not constitute a reason for rejection, as it may still provide sufficient material for analysis.

B (Urine specimen temperature is 23° C (73.4° F).) CORRECT

A urine specimen must be within a specific temperature range, typically around 36-38° C, to ensure that it reflects a fresh sample. A temperature of 23° C is too low and can lead to the growth of bacteria or changes in chemical composition, making it a valid cause for rejection.

C (Urine specimen container is missing a preservative.) YOUR ANSWER

While some urine tests require preservatives to maintain the stability of certain components, many routine urinalysis tests can be performed on unpreserved specimens. The absence of a preservative may not be a cause for rejection unless specified for particular tests, making this choice ambiguous.

D (Urine specimen is amber and turbid.) YOUR ANSWER

Amber coloration and turbidity may indicate abnormalities or the presence of substances in the urine, but they do not automatically warrant rejection. Such characteristics can be evaluated during analysis, and the specimen may still be valid for testing.

Conclusion

For a routine urinalysis, maintaining proper specimen temperature is crucial for ensuring accurate test results. Among the provided options, a specimen temperature of 23° C is clearly outside the acceptable range, justifying its rejection. Other factors like volume, preservatives, and appearance can be assessed further without necessarily leading to specimen rejection.

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