A nurse is reinforcing teaching with a client who is to take a fecal occult blood test at home. Which of the following instructions should the nurse include in the teaching?
Apply five drops of developer to each smear.
Use the same part of stool for each sample.
Ensure the sample contains no urine.
Wait 10 min before applying the developing solution.
The Correct Answer is C
A. Apply five drops of developer to each smear: Typically, two drops of developer are applied per sample, not five. Applying excess developer may dilute the reaction and yield unreliable results.
B. Use the same part of stool for each sample: Samples should be taken from different parts of the stool to ensure accuracy and detect localized bleeding.
C. Ensure the sample contains no urine: Urine contamination can interfere with test results, leading to inaccurate findings. The client should collect a clean stool sample.
D. Wait 10 min before applying the developing solution: The developing solution should be applied immediately after placing the stool sample on the test card to prevent errors in interpretation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Apply five drops of developer to each smear: Typically, two drops of developer are applied per sample, not five. Applying excess developer may dilute the reaction and yield unreliable results.
B. Use the same part of stool for each sample: Samples should be taken from different parts of the stool to ensure accuracy and detect localized bleeding.
C. Ensure the sample contains no urine: Urine contamination can interfere with test results, leading to inaccurate findings. The client should collect a clean stool sample.
D. Wait 10 min before applying the developing solution: The developing solution should be applied immediately after placing the stool sample on the test card to prevent errors in interpretation.
Correct Answer is B
Explanation
A. Hemorrhoidectomy is not likely to cause a false-positive test, as the wound would typically heal and stop bleeding after a year.
B. The client takes ibuprofen for headaches: Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that can irritate the gastrointestinal (GI) tract, leading to minor bleeding in the stomach or intestines, which can result in a false-positive fecal occult blood test.
C. Citrus juice may alter the pH of the stool but is not a known cause of false-positive results in fecal occult blood tests.
D. Breast cancer is not directly associated with causing false-positive results in fecal occult blood tests.
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