Practice Quiz

CCRN Critical Care Nursing

Category - Pediatrics

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Which of the following would be a diagnostic test for Phenylketonuria which uses fresh urine mixed with ferric chloride:
  1. Guthrie Test
  2. Phenestix test
  3. Beutler’s test
  4. Coomb’s test
Explanation
Answer: B - Phenestix test is a diagnostic test for Phenylketonuria which uses a fresh urine sample (diapers) and mixed with ferric chloride. If positive, there will be a presence of green spots at the diapers. Guthrie test is another test for PKU and is the one that mostly used. The specimen used is the blood and it tests if CHON is converted to amino acid.
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