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Remifentanil: when and how to use it
1Département d'anesthésia, Hôpital Bichat, Paris, France.
Abstract:
Remifentanil is a new potent mu-agonist with a unique pharmacokinetic profile due to a rapid metabolism by non-specific tissue esterases. As a consequence, remifentanil pharmacokinetics are not modified by severe renal or hepatic dysfunction. During general anaesthesia, any dosage of remifentanil may be used without undue lengthening of emergence times. In cardiac surgery, remifentanil combines the requirement for intra-operative control of stress responses and rapid recovery. The rapid termination of remifentanil action warrants modifications of the current practice concerning early postoperative pain control. Remifentanil may be used as a sedative during monitored analgesia, or as a postoperative analgesic in spontaneously breathing patients, provided bolus doses are avoided. Remifentanil may increase patients' safety by eliminating the risk of delayed respiratory depression, but its correct use requires major changes in our prescribing habits.
Insights
Remifentanil, a potent opioid, offers rapid metabolism and predictable effects, unaffected by organ dysfunction. Its unique profile necessitates changes in postoperative pain management strategies for enhanced patient safety.
Area of Science:
- Anesthesiology and Pharmacology
Background:
- Remifentanil is a potent mu-opioid agonist with rapid metabolism by tissue esterases.
- This unique pharmacokinetic profile is independent of renal or hepatic function.
Purpose of the Study:
- To evaluate the implications of remifentanil's pharmacokinetic profile on its use in general anesthesia and cardiac surgery.
- To discuss modifications needed for postoperative pain control and sedation.
Main Methods:
- Pharmacokinetic analysis of remifentanil metabolism.
- Review of clinical applications in general anesthesia and cardiac surgery.
- Assessment of impact on emergence times and postoperative pain management.
Main Results:
- Remifentanil pharmacokinetics are unaffected by severe renal or hepatic dysfunction.
- Dosage adjustments are not required during general anesthesia, with no undue lengthening of emergence times.
- Rapid offset of action requires revised approaches to early postoperative pain control.
Conclusions:
- Remifentanil can be used safely in various surgical settings, including cardiac surgery, due to predictable pharmacokinetics.
- Its use as a sedative or postoperative analgesic requires careful administration, avoiding bolus doses.
- Implementation of remifentanil necessitates significant changes in prescribing habits to maximize patient safety and optimize outcomes.
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