Epidural morphine for postoperative pain: experience with 1085 patients

Area of Science:

• Anesthesiology
• Pain Management
• Pharmacology

Background:

• Postoperative pain management is crucial for patient recovery.
• Epidural analgesia offers an effective route for pain relief.
• Morphine is a commonly used opioid for pain management.

Purpose of the Study:

• To evaluate the efficacy and side effects of epidural morphine for pain relief in 1085 patients undergoing various surgeries.
• To determine optimal initial dosing strategies for epidural morphine based on surgical type.
• To assess patient satisfaction with epidural morphine analgesia.

Main Methods:

• Prospective study involving 1085 patients receiving epidural morphine.
• Morphine chloride diluted and administered via epidural catheter.
• Dosing adjusted to achieve complete pain relief, with initial doses of 4 or 6 mg.

Main Results:

• High patient satisfaction reported: 97% for hip arthroplasty, 91% for prostatectomy/thoracotomy, 90% for lower extremity surgery, 88% for laparotomy.
• 4 mg initial dose effective for hip arthroplasty and lower extremity surgery.
• 6 mg initial dose superior for prostatectomy, laparotomy, and thoracotomy.
• Side effects: pruritus (11%), nausea/vomiting (34%), urinary retention (42% without catheters), rare respiratory depression (0.9%).

Conclusions:

• Epidural morphine is highly effective for postoperative pain control across multiple surgical procedures.
• Dosing of 4-6 mg initial epidural morphine should be tailored to surgical type for optimal outcomes.
• While generally safe, common side effects like nausea and urinary retention require monitoring and management.