Certified Neuroscience Registered Nurse (CNRN) Practice Exam

Which of the following is NOT a patient-related risk factor for post-operative nausea and vomiting (PONV)?

1. Age over 50

2. Female sex

3. History of motion sickness

4. History of PONV

The correct answer is: Age over 50

Age over 50 is typically not considered a significant risk factor for post-operative nausea and vomiting (PONV). Research indicates that individuals under 50 are often more prone to experience PONV, particularly women, who are at an increased risk due to hormonal factors. Female sex is a well-acknowledged risk factor, as studies consistently show that women are more susceptible to PONV than men. Moreover, a history of motion sickness is also linked to an increased incidence of PONV, indicating a predisposition in individuals who experience nausea in other contexts. Similarly, a prior history of PONV is an established risk factor, as those who have experienced it in the past are more likely to encounter it again following surgery. Understanding these risk factors can help healthcare providers anticipate and manage PONV more effectively for at-risk patients.