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[Decrease in isoflurane requirements and of postoperative pain with preanesthetic intrathecal morphine]
R Martín-Larrauri1, C Mestre, A Bárcena
1Servicio de Anestesiología y Reanimación, Hospital Universitario del Aire, Madrid.
Revista Espanola De Anestesiologia Y Reanimacion
|February 1, 1995
Summary
Preanesthetic intrathecal morphine significantly reduced isoflurane needs for anesthesia maintenance. This method also provided long-term postoperative pain relief without increasing complications.
Area of Science:
- Anesthesiology
- Pharmacology
Background:
- Intrathecal morphine is used for analgesia.
- Isoflurane is a common anesthetic agent.
Purpose of the Study:
- To determine if preanesthetic intrathecal morphine reduces isoflurane requirements.
- To assess postoperative analgesia duration and complications.
Main Methods:
- 45 adult patients were divided into three groups receiving subcutaneous or intrathecal morphine before surgery.
- Anesthesia was maintained with nitrous oxide and isoflurane, with isoflurane needs monitored.
- Postoperative pain was assessed using a visual analog scale.
Main Results:
- Intrathecal morphine significantly reduced intraoperative isoflurane requirements compared to subcutaneous administration.
- Postoperative analgesia lasted over 28 hours in groups receiving intrathecal morphine.
- No significant differences in complications or respiratory depression were observed between intrathecal morphine groups.
Conclusions:
- Preanesthetic intrathecal morphine effectively reduces isoflurane requirements for anesthetic maintenance.
- Intrathecal morphine provides prolonged postoperative analgesia.
- This approach is safe and does not increase postoperative complications.