Why might patients be instructed to avoid sedatives prior to surgery?

Patients are advised to avoid sedatives prior to surgery primarily to prevent interactions with anesthetics and the risk of potential respiratory depression. Sedatives can depress the central nervous system, leading to decreased respiratory drive. If a patient were to receive sedatives close to the time of surgery, their respiratory function could be further compromised when combined with anesthetic agents. This can result in inadequate ventilation and significant complications during and after surgery.

By avoiding sedatives, the healthcare team can better manage the patient's airway and ensure safer overall anesthetic induction and maintenance. Preserving respiratory function is critical, especially in patients with pre-existing respiratory issues or those undergoing procedures that may affect respiratory function.