Nokea
A patient will be undergoing abdominal computed tomography (CT) with contrast. The nurse has administered IV sodium bicarbonate and oral acetylcysteine (Mucomyst) before the study as ordered. What would indicate that these medications have had the desired therapeutic effect?
- A. The patient's BUN and creatinine levels are within reference range following the CT.
- B. The CT yields high-quality images.
- C. The patient's electrolytes are stable in the 48 hours following the CT.
- D. The patient's intake and output are in balance on the day after the CT.
Correct Answer: A
Rationale: Both sodium bicarbonate and Mucomyst are free radical scavengers that sequester the contrast byproducts that are destructive to renal cells. Kidney damage would be evident by increased BUN and creatinine levels. These medications are unrelated to electrolyte or fluid balance and they play no role in the results of the CT.
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Probably the most widely used in-office or at-home occult blood test is the Hemoccult II. The patient has come to the clinic because he thinks there is blood in his stool. When you reviewed his medications, you noted he is on antihypertensive drugs and NSAIDs for early arthritic pain. You are sending the patient home with the supplies necessary to perform 2 hemoccult tests on his stool and mail the samples back to the clinic. What instruction would you give this patient?
- A. Take all your medications as usual.
- B. Take all your medications except the antihypertensive medications.
- C. Don't eat highly acidic foods 72 hours before you start the test.
- D. Avoid vitamin C for 72 hours before you start the test.
Correct Answer: D
Rationale: Red meats, aspirin, nonsteroidal anti-inflammatory drugs, turnips, and horseradish should be avoided for 72 hours prior to the study, because they may cause a false-positive result. Also, ingestion of vitamin C from supplements or foods can cause a false-negative result. Acidic foods do not need to be avoided.
A nurse in a stroke rehabilitation facility recognizes that the brain regulates swallowing. Damage to what area of the brain will most affect the patient's ability to swallow?
- A. Temporal lobe
- B. Medulla oblongata
- C. Cerebellum
- D. Pons
Correct Answer: B
Rationale: Swallowing is a voluntary act that is regulated by a swallowing center in the medulla oblongata of the central nervous system. Swallowing is not regulated by the temporal lobe, cerebellum, or pons.
An inpatient has returned to the medical unit after a barium enema. When assessing the patient's subsequent bowel patterns and stools, what finding should the nurse report to the physician?
- A. Large, wide stools
- B. Milky white stools
- C. Three stools during an 8-hour period of time
- D. Streaks of blood present in the stool
Correct Answer: D
Rationale: Barium has a high osmolarity and may draw fluid into the bowel, thus increasing the intraluminal contents and resulting in greater output (large stools). The barium will give the stools a milky white appearance, and it is not uncommon for the patient to experience an increase in the number of bowel movements. Blood in fecal matter is not an expected finding and the nurse should notify the physician.
An advanced practice nurse is assessing the size and density of a patient's abdominal organs. If the results of palpation are unclear to the nurse, what assessment technique should be implemented?
- A. Percussion
- B. Auscultation
- C. Inspection
- D. Rectal examination
Correct Answer: A
Rationale: Percussion is used to assess the size and density of the abdominal organs and to detect the presence of air-filled, fluid-filled, or solid masses. Percussion is used either independently or concurrently with palpation because it can validate palpation findings.
A nurse is caring for a newly admitted patient with a suspected GI bleed. The nurse assesses the patient's stool after a bowel movement and notes it to be a tarry-black color. This finding is suggestive of bleeding from what location?
- A. Sigmoid colon
- B. Upper GI tract
- C. Large intestine
- D. Anus or rectum
Correct Answer: B
Rationale: Blood shed in sufficient quantities in the upper GI tract will produce a tarry-black color (melena). Blood entering the lower portion of the GI tract or passing rapidly through it will appear bright or dark red. Lower rectal or anal bleeding is suspected if there is streaking of blood on the surface of the stool or if blood is noted on toilet tissue.