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 A
Explanation
Choice A reason: Urinating before and after sexual intercourse can help flush out any bacteria that may have entered the urinary tract during sexual activity, and prevent them from causing an infection.
Choice B reason: Increasing milk consumption to make the urine more alkaline is not a recommended instruction, as it may increase the risk of developing kidney stones or calcium deposits in the urinary tract.
Choice C reason: Emptying the bladder at least every 4 hours is a good practice, but not sufficient to prevent urinary tract infections. The nurse should also advise the client to drink plenty of fluids, especially water, to dilute the urine and flush out bacteria.
Choice D reason: Using vaginal douche once a week is not a recommended instruction, as it may alter the normal flora of the vagina and increase the risk of infection. The nurse should advise the client to avoid using any products that may irritate the genital area, such as perfumed soaps, sprays, or powders.
Choice E reason: Drinking cranberry juice daily is not a proven method to prevent urinary tract infections, although some studies suggest that it may have some benefits. The nurse should inform the client that cranberry juice may interact with some medications, such as warfarin, and that it may also increase the acidity of the urine, which can cause discomfort or burning sensation.
Correct Answer is A
Explanation
Choice A reason: BUN or blood urea nitrogen 30 mg/dL is above the normal range of 10 to 20 mg/dL and indicates renal impairment or dehydration, which can be caused by contrast dye used during coronary angiography or blood loss during or after the procedure. The nurse should report this value to the provider and monitor the client for signs of acute kidney injury, such as oliguria, edema, or electrolyte imbalances.
Choice B reason: Sinus rhythm 95/min on a cardiac monitor is within the normal range of 60 to 100/min and does not indicate any cardiac arrhythmia or ischemia.
Choice C reason: Respiratory rate 12/min is within the normal range of 12 to 20/min and does not indicate any respiratory distress or hypoxia.
Choice D reason: PTT or partial thromboplastin time 25 seconds is within the normal range of 25 to 35 seconds and does not indicate any bleeding disorder or anticoagulant therapy.
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