A nurse is reviewing the results of a client's fecal occult blood screening test. Which of the following findings from the client's history should the nurse identify as potentially causing a false-positive result?
The client takes ibuprofen for headaches.
The client had a hemorrhoidectomy 1 year ago.
The client has a history of breast cancer.
The client consumed citrus juice 3 days before the test.
The Correct Answer is A
Choice A reason: Taking ibuprofen or other nonsteroidal anti-inflammatory drugs (NSAIDs) can cause a false-positive result on a fecal occult blood screening test, as they can irritate the gastrointestinal mucosa and cause bleeding.
Choice B reason: Having a hemorrhoidectomy 1 year ago is unlikely to cause a false-positive result on a fecal occult blood screening test, as hemorrhoids are usually a source of bright red blood that can be seen with naked eye, not occult blood that requires chemical detection.
Choice C reason: Having a history of breast cancer is not related to a false-positive result on a fecal occult blood screening test, as breast cancer does not affect the gastrointestinal tract or cause bleeding in stool.
Choice D reason: Consuming citrus juice 3 days before the test is not likely to cause a false-positive result on a fecal occult blood screening test, as citrus juice does not contain any substances that can interfere with the chemical reaction of the test. However, consuming red meat, raw vegetables, vitamin C supplements, or iron supplements within 3 days before the test can cause false-negative results, as they can mask or degrade occult blood in stool.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A: This is incorrect. Potassium 4.0 mEq/L is a normal value and does not indicate heart failure.
Choice B: This is correct. Brain natriuretic peptide (BNP) is a hormone that is released by the heart when it is stretched or overloaded. A high level of BNP indicates that the heart is working harder than normal and may have heart failure. A normal BNP level is less than 100 pg/mL, so 275 pg/mL is elevated and suggestive of heart failure.
Choice C: This is incorrect. Sodium 140 mEq/L is a normal value and does not indicate heart failure.
Choice D: This is incorrect. Calcium 9.0 mg/dL is a normal value and does not indicate heart failure.
Correct Answer is A
Explanation
Choice A reason: Withholding the medication if the systolic blood pressure is less than 90 mm Hg is an appropriate action, as propranolol is a beta-blocker that can lower blood pressure and cause hypotension, which can impair tissue perfusion and cause dizziness, fainting, or shock.
Choice B reason: Requesting a dosage increase if the apical heart rate is less than 60/min is an inappropriate action, as propranolol can slow down the heart rate and cause bradycardia, which can lead to fatigue, weakness, or cardiac arrest. The nurse should monitor the apical pulse before administering propranolol and withhold it if it is less than 60/min.
Choice C reason: Informing the client to expect increased hair growth is an incorrect statement, as propranolol does not cause hypertrichosis or excessive hair growth. However, another beta-blocker, minoxidil, can cause this side effect.
Choice D reason: Administering the medication with an antacid is not an appropriate action, as antacids can interfere with the absorption of propranolol and reduce its effectiveness. The nurse should administer propranolol on an empty stomach or with food that does not contain antacids.
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