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 Reason:
The statement “I will wrap the suction catheters in a clean towel to be used again at a later time” is incorrect. Suction catheters should be disposed of after each use to prevent infection. Reusing catheters, even if wrapped in a clean towel, can introduce bacteria into the tracheostomy site, leading to potential infections.
Choice B Reason:
The statement “I will set the suction pressure dial between 80 and 120” is correct. The recommended suction pressure for adults is typically between 80 and 120 mmHg. This range is sufficient to effectively clear secretions without causing trauma to the tracheal mucosa. Setting the suction pressure within this range ensures safe and effective suctioning.
Choice C Reason:
The statement “I will suction for less than 15 seconds while inserting the suction catheter” is incorrect. Suctioning should be performed intermittently and for no longer than 10-15 seconds at a time. However, suctioning should not occur while inserting the catheter. Suction should be applied only while withdrawing the catheter to minimize trauma to the tracheal mucosa.
Choice D Reason:
The statement “I will suction the mouth before inserting the suction catheter into the tracheostomy” is incorrect. Suctioning the mouth before the tracheostomy can introduce oral bacteria into the tracheostomy site, increasing the risk of infection. The correct procedure is to suction the tracheostomy first and then the mouth if needed.
Correct Answer is B
Explanation
Choice A reason: Keeping both arms below the level of the client's heart can increase venous pressure and fluid accumulation in the affected arm, which can lead to lymphedema.
Choice B reason: After a mastectomy, it’s important to avoid procedures like blood draws, injections, or blood pressure measurements on the side where the surgery was performed to prevent lymphedema. Therefore, using the client’s left arm for blood samples is a preventive measure.
Choice C reason: Obtaining blood pressure readings using the client's right arm is an incorrect action that can increase lymphatic fluid accumulation and impair circulation in the affected arm.
Choice D reason: Limiting range-of-motion exercises with the affected arm is an incorrect action that can decrease lymphatic drainage and increase swelling in the affected arm. The nurse should encourage the client to perform gentle exercises, such as squeezing a soft ball or raising and lowering the arm, to promote lymphatic flow and prevent stiffness.

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