Esketamine and Anesthesia in Elderly Surgical Patients

Summary of Findings Regarding Low-Dose Esketamine in Elderly Patients (from the provided text)

This text presents evidence supporting the safety and potential benefits of low-dose esketamine in elderly patients undergoing surgery, specifically focusing on its hemodynamic and analgesic effects. Here’s a breakdown of the key points:

* No Negative Impact on Recovery: A single bolus of 0.2 mg/kg esketamine did not prolong extubation or emergence times, nor did it increase emergence agitation or delirium in the study.
* consistent with other Research: These findings are supported by previous studies in both pediatric and elderly populations.
* Children (Tonsillectomy): 0.25 mg/kg esketamine reduced emergence agitation without affecting extubation time.
* Elderly (Hip/Knee Arthroplasty): Perioperative low-dose esketamine (0.2 mg/kg loading, 0.125 mg/kg/h infusion) did not increase postoperative delirium or recovery times,and psychomimetic effects were rare.
* Elderly (Gastrointestinal Surgery): Low-dose esketamine improved postoperative analgesia and reduced inflammatory markers (IL-6) without increasing negative side effects like nausea, vomiting, nightmares, or delirium.
* Importance of Dose Optimization: While low-dose esketamine appears safe, higher doses or prolonged infusions may pose risks.
* Individual Variability & Potential Benefits for Specific Patients: Patients with reduced cardiovascular reserve, impaired baroreflex sensitivity, baseline sympathetic tone, or preoperative fluid deficits (common in elderly GI surgery patients) may benefit more from esketamine’s sympathomimetic properties (increased norepinephrine, vascular tone, and cardiac contractility) to help manage hypotension.

In essence, the text argues that low-dose esketamine can be a valuable tool for managing hemodynamics and pain in elderly surgical patients, but careful consideration of individual patient factors and appropriate dosing are crucial.