Esmolol for hypotensive anesthesia in middle ear surgery

Area of Science:

• Anesthesiology
• Cardiovascular Pharmacology

Background:

• Hypotensive anesthesia is crucial for optimizing surgical conditions in procedures like middle ear surgery.
• Controlling intraoperative blood loss and improving surgical field visibility are key challenges in otologic procedures.

Purpose of the Study:

• To evaluate the efficacy and safety of esmolol as a hypotensive agent during middle ear surgery.
• To assess the hemodynamic effects and postoperative outcomes associated with esmolol-induced hypotension.

Main Methods:

• A comparative study involving 40 patients (20 esmolol group, 20 control) undergoing middle ear surgery.
• Standardized premedication, induction, and maintenance of anesthesia were employed, with esmolol infusion initiated for controlled hypotension.
• Comprehensive monitoring included hemodynamic parameters, central venous pressure, ECG, body temperature, capnography, and arterial blood gas analysis.

Main Results:

• Esmolol infusion (mean 330 ± 10 µg/kg/min) significantly reduced systolic (28.7%), mean (26.5%), and diastolic (33.4%) blood pressure.
• A virtually bloodless operative field was achieved, facilitating surgical procedures.
• Hemodynamic parameters returned to baseline or near-baseline levels post-infusion with no observed side effects.

Conclusions:

• Esmolol is a safe and effective agent for inducing controlled hypotension in middle ear surgery.
• Its ease of administration and control, coupled with a lack of side effects, make it suitable for hypotensive anesthesia in this context.