A nurse is discussing adenosine with a nursing student. Which ...

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A nurse is discussing adenosine with a nursing student. Which statement by the student indicates a need for further teaching?
 
  a. Adenosine acts by suppressing action potentials in the SA and AV nodes.
  b. Adenosine can be used to prevent parox-ysmal supraventricular tachycardia and Wolff-Parkinson-White syndrome.
  c. Adenosine has a half-life that lasts only a few seconds and must be given intrave-nously.
  d. Adenosine is not effective for treating atrial fibrillation, atrial flutter, or ventri-cular dysrhythmias.

Question 2

A patient in her twenties has frequent urinary tract infections, and her prescriber suggests drinking cranberry juice. She asks the nurse how drinking this can help. The nurse will tell her that cranberry juice:
 
  a. acidifies the urine to slow the growth of the bacteria.
  b. helps treat established infections.
  c. prevents bacteria from adhering to the urinary tract wall.
  d. reduces the odor of the urine.

[Ptupou85]

Answer to Question 1

B
Adenosine is used to terminate paroxysmal supraventricular tachycardia (SVT) and Wolff-Parkinson-White (WPW) syndrome, not to prevent symptoms. Adenosine suppresses ac-tion potentials in the SA and AV nodes. Because it has a very short half-life of 1.5 to 10 seconds, it must be given IV bolus, as close to the heart as possible. Adenosine is not active against atrial fibrillation, atrial flutter, or ventricular dysrhythmias.

Answer to Question 2

C
Cranberry juice helps prevent UTIs by preventing bacteria from adhering to the urinary tract wall. It does not acidify the urine or treat established infections. It can reduce odor, but this action does not contribute to decreased infections.

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TYSM

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