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Multimodal analgesia before thoracic surgery does not reduce postoperative pain
B P Kavanagh1, J Katz, A N Sandler
1Department of Anaesthesia, Toronto Hospital, Canada.
British Journal of Anaesthesia
|August 1, 1994
Summary
Preoperative multimodal analgesia did not reduce overall postoperative pain after thoracotomy. While initial morphine use was lower, later consumption increased, indicating no long-term benefit for pain management.
Area of Science:
- Anesthesiology
- Pain Management
- Thoracic Surgery
Background:
- Preoperative nociceptive blocks are explored for extended postoperative pain relief.
- Investigating preemptive analgesia's efficacy and respiratory impact is crucial for surgical patients.
Purpose of the Study:
- To evaluate a multimodal preoperative antinociceptive regimen for post-thoracotomy pain.
- To assess the regimen's impact on postoperative analgesic requirements and respiratory function.
Main Methods:
- Double-blind, placebo-controlled study with 30 thoracotomy patients.
- Treatment group received i.m. morphine, perphenazine, rectal indomethacin, and intercostal nerve block with bupivacaine.
- Placebo group received i.m. midazolam, placebo suppository, and saline intercostal nerve block.
Main Results:
- Significantly less morphine consumed via patient-controlled analgesia in the first 6 hours post-op in the treatment group.
- Significantly greater total morphine consumption on postoperative days 2 and 3 in the treatment group.
- No significant differences in pain scores (VAS), PaCO2, or spirometry between groups.
Conclusions:
- The studied preoperative multimodal regimen did not effectively reduce overall post-thoracotomy pain.
- The regimen did not provide sustained analgesia beyond the initial postoperative period.
- Results do not support the preoperative use of this combined regimen for post-thoracotomy pain management.