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Esmolol attenuates cardiovascular responses to extubation.
A Dyson1, P A Isaac, J H Pennant
1Department of Anesthesiology, University of Texas Southwestern Medical Center, Dallas 75235-9068.
Anesthesia and Analgesia
|December 1, 1990
Summary
Esmolol effectively controlled heart rate and blood pressure during extubation. Doses of 1.5 and 2 mg/kg were most effective, though the higher dose caused significant blood pressure drops.
Area of Science:
- Anesthesiology
- Cardiovascular Pharmacology
Background:
- Hemodynamic changes during extubation can be significant.
- Controlling these changes is crucial for patient safety.
Purpose of the Study:
- To evaluate the efficacy of different esmolol doses in blunting hemodynamic responses during extubation.
- To determine the optimal esmolol dosage for managing heart rate and blood pressure surges.
Main Methods:
- A double-blind study involving 40 patients (ASA I-II).
- Esmolol was administered at 1, 1.5, or 2 mg/kg as a bolus post-neuromuscular blockade reversal.
- Heart rate and systolic blood pressure were monitored during extubation and emergence.
Main Results:
- The control group showed significant increases in heart rate, systolic blood pressure, and rate-pressure product.
- All esmolol doses attenuated heart rate increases.
- 1.5 and 2 mg/kg esmolol effectively controlled both heart rate and systolic blood pressure, with the higher dose causing hypotension.
Conclusions:
- Esmolol, particularly at 1.5 and 2 mg/kg, is effective in attenuating adverse hemodynamic responses to extubation.
- Careful dose selection is necessary to avoid hypotension with higher esmolol doses.