Certified Neuroscience Registered Nurse (CNRN) Practice Exam

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Prepare for the CNRN Exam. Test your knowledge with our comprehensive multiple-choice questions and detailed explanations. Boost your confidence and improve your chances of a successful exam outcome!

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Which of the following is NOT a method to reduce the risk of PONV?

Minimize opioids
Using blocks or TIVA
Administration of nitrous oxide
Adequate hydration

The correct answer is: Administration of nitrous oxide

The choice of administration of nitrous oxide is considered the correct response to the question about which method is NOT effective in reducing the risk of postoperative nausea and vomiting (PONV). Nitrous oxide has been associated with a higher incidence of PONV due to its effects on the vestibular system and its impact on the release of neurotransmitters that can trigger nausea. While some methods such as minimizing opioid use, employing regional anesthesia techniques like nerve blocks or total intravenous anesthesia (TIVA), and ensuring adequate hydration have all been shown to help minimize the risk of PONV, the use of nitrous oxide does not follow this trend and may actually exacerbate the risk. Thus, when considering strategies to reduce PONV, nitrous oxide stands out as an approach that may not provide protective benefits and can even negatively influence postoperative outcomes.