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Extradural clonidine infusions for analgesia after total hip replacement
U A Carabine1, K R Milligan, D Mulholland
1Department of Anaesthetics, Queen's University, Belfast.
British Journal of Anaesthesia
|April 1, 1992
Summary
Extradural clonidine infusions effectively manage postoperative pain after hip replacement, reducing the need for systemic analgesics. Combining clonidine with morphine further enhanced pain relief and prolonged its duration.
Area of Science:
- Anesthesiology
- Pharmacology
Background:
- Postoperative pain management is crucial for patient recovery.
- Epidural analgesia is a common method for managing surgical pain.
Purpose of the Study:
- To evaluate extradural clonidine infusions for postoperative pain relief.
- To assess the impact of clonidine on extradural morphine efficacy.
Main Methods:
- Double-blind, controlled study involving patients undergoing total hip replacement.
- Randomized allocation to receive either 25 or 50 micrograms/hour of extradural clonidine, low-dose extradural morphine, or a combination of morphine and clonidine.
Main Results:
- Clonidine groups and the combination group showed significantly lower pain scores in the first hour compared to the morphine group.
- The combination and higher-dose clonidine groups required less systemic analgesia.
- The duration of the initial analgesic dose was significantly longer in the combination and higher-dose clonidine groups.
Conclusions:
- Extradural clonidine is effective for postoperative analgesia following hip replacement.
- Combining clonidine with morphine enhances pain relief and extends its duration.
- Clonidine may reduce the need for systemic analgesics, though it can cause a slight reduction in arterial pressure.