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New drug in volatile anaesthesia--desflurane
1University Department of Anaesthesia, Leicester Royal Infirmary, United Kingdom.
Annals of the Academy of Medicine, Singapore
|July 1, 1994
Summary
Desflurane offers rapid anesthesia induction and recovery, comparable or faster than propofol or isoflurane. This volatile anesthetic is stable, minimally metabolized, and requires a specialized heated vaporizer.
Area of Science:
- Anesthesiology
- Pharmacology
Background:
- Desflurane is a novel fluorinated ether anesthetic agent.
- Its unique properties necessitate evaluation for clinical application.
Purpose of the Study:
- To characterize the pharmacokinetic and pharmacodynamic profile of desflurane.
- To compare recovery characteristics with other anesthetic agents.
- To assess safety and efficacy in various patient populations.
Main Methods:
- Clinical trials evaluating onset, recovery, and minimum alveolar concentration (MAC).
- Assessment of hemodynamic stability, respiratory effects, and drug interactions.
- Evaluation of specialized delivery system (Tec 6 vaporizer).
Main Results:
- Rapid onset and recovery from anesthesia, faster than or comparable to propofol and isoflurane.
- MAC decreases with age, reduced by premedication; minimal metabolism and stability with soda-lime.
- Potential for airway irritation during inhalational induction, especially in children.
- Hemodynamic effects include reduced blood pressure but maintained cardiac output; respiratory depression and potentiation of neuromuscular blockers observed.
- Cerebrovascular autoregulation preserved, though intracranial pressure may increase.
Conclusions:
- Desflurane provides advantageous recovery profiles for general anesthesia.
- Careful administration is required due to potential airway reflexes and respiratory depression.
- Requires a specialized heated vaporizer (Tec 6) for accurate delivery.