A nurse is providing preoperative teaching to an older adult female client who is scheduled for a laminectomy and uses supplements. Which of the following supplements should the nurse identify as increasing the client's risk for hypotension during surgery?

A. "I should visually monitor the client continuously when in mechanical restraints." Continuous visual monitoring is required to ensure the client’s safety, monitor for distress or injury, and assess the ongoing need for restraints. This is a key safety standard in the use of mechanical restraints.
B. "I should assess the client's skin integrity every 8 hours while in mechanical restraints." Skin integrity must be assessed much more frequently, typically every 15 to 30 minutes, to prevent injury or pressure-related complications while the client is restrained.
C. "I should expect the provider to evaluate the client within 4 hours of restraint application." For adults, a provider must evaluate the client within 1 hour of the initiation of mechanical restraints. A 4-hour delay does not meet safety or legal standards.
D. "I should ask the provider to write a prescription for mechanical restraints as needed." PRN (as-needed) prescriptions for restraints are not permitted. Each use must be justified, time-limited, and based on the client’s immediate behavior or condition.

Miosis : Pinpoint pupils are a hallmark of opioid overdose due to stimulation of the parasympathetic nervous system. This finding helps distinguish opioid toxicity from other types of substance use, which often cause pupil dilation instead.

Respiratory depression : Opioids depress the medullary respiratory centers in the brainstem, leading to slowed breathing. A respiratory rate of 10/min is significantly reduced and signals impaired ventilation, making it a critical diagnostic clue.

Opioid overdose: The clinical signs—needle marks, sedation, pinpoint pupils, bradypnea, and a positive response to naloxone—all strongly point to an opioid overdose. A similar prior episode adds to the likelihood of chronic opioid misuse.

Alcohol intoxication: While alcohol can depress the central nervous system, it does not typically cause miosis or respond to naloxone. Also, the pattern of rapid reversal with naloxone suggests opioid involvement rather than alcohol alone.

Benzodiazepine overdose: Though it shares features like sedation and respiratory depression with opioid overdose, benzodiazepine toxicity does not cause miosis, and naloxone has limited or no effectiveness as a reversal agent.

Cocaine intoxication : Typically causes stimulant effects including mydriasis (dilated pupils), increased heart rate, hypertension, and agitation. These are not consistent with the symptoms in this case, which reflect CNS depression.