Nokea
Which finding in the patient's history contraindicates the use of Imitrex (sumatriptan) for the prevention of migraine headaches?
- A. Diabetes
- B. Angina
- C. Renal calculi
- D. Peptic ulcer disease
Correct Answer: B
Rationale: Sumatriptan (Imitrex) is a vasoconstrictor contraindicated in patients with angina due to the risk of coronary artery vasoconstriction and ischemia. Diabetes renal calculi and peptic ulcer disease are not contraindications for sumatriptan.
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The physician has scheduled a Whipple procedure for a client with pancreatic cancer. The nurse recognizes that the client's cancer is located in:
- A. The tail of the pancreas
- B. The head of the pancreas
- C. The body of the pancreas
- D. The entire pancreas
Correct Answer: B
Rationale: The Whipple procedure (pancreaticoduodenectomy) is performed for cancer in the head of the pancreas, removing the head, duodenum, and other structures. Tail or body cancers require different surgeries.
A client is taking Rifadin (rifampin) 600 mg PO daily for pulmonary tuberculosis. The nurse should tell the client to:
- A. Take the medication with juice
- B. Expect red discoloration of the urine
- C. Take the medication before going to bed at night
- D. Take the medication only if night sweats occur
Correct Answer: B
Rationale: Rifampin causes harmless red-orange discoloration of urine, sweat, and tears, which clients should be informed about to avoid alarm. It can be taken with or without food, timing is not restricted to bedtime, and it is taken daily, not conditionally.
A client with a history of liver cirrhosis is admitted with complaints of ascites. The nurse should give priority to:
- A. Monitoring for infection
- B. Administering pain medication
- C. Monitoring blood pressure
- D. Administering diuretics
Correct Answer: A
Rationale: Ascites increases infection risk (e.g., spontaneous bacterial peritonitis) in cirrhosis, so monitoring for infection is the priority.
A female client is started on warfarin (Coumadin) 5 mg po bid. To adequately evaluate the effectiveness of the warfarin therapy, the nurse must know that this medication:
- A. Dissolves any clots already formed in the arteries
- B. Prevents the conversion of prothrombin to thrombin
- C. Interferes with the synthesis of vitamin K-dependent clotting factors
- D. Stimulates the manufacturing of platelets
Correct Answer: C
Rationale: Thrombolytic agents (e.g., streptokinase) directly activate plasminogen, dissolving fibrin deposits, which in turn dissolves clots that have already formed. Heparin prevents the formation of clots by potentiating the effects of antithrombin III and the conversion of prothrombin to thrombin. Warfarin prevents the formation of clots by interfering with the hepatic synthesis of the vitamin K-dependent clotting factors. Platelets initiate the coagulation of blood by adhering to each other and the site of injury to form platelet plugs.
The nurse is preparing to administer oral potassium chloride to an elderly client. Which action should the nurse take before administering the medication?
- A. Perform a fingerstick for morning glucose
- B. Assess for signs of hypocalcemia
- C. Withhold food for thirty minutes
- D. Check the creatinine level
Correct Answer: D
Rationale: Potassium chloride can worsen renal function in elderly clients. Checking the creatinine level assesses kidney function to ensure safe administration. Glucose hypocalcemia and withholding food are not directly related to potassium administration.