Continuous intravenous morphine for pain relief after abdominal surgery

Area of Science:

• Anesthesiology
• Pain Management
• Postoperative Care

Background:

• Effective pain management is crucial for recovery after abdominal surgery.
• Morphine is a common analgesic, but its administration method impacts safety and efficacy.
• Continuous intravenous infusion offers potential for stable pain relief.

Purpose of the Study:

• To evaluate the efficacy and safety of continuous intravenous morphine infusion for postoperative pain control.
• To determine the optimal dosing and identify potential complications.
• To assess the feasibility of this method in a general surgical ward.

Main Methods:

• Prospective study of 247 patients undergoing elective abdominal surgery.
• Morphine administered via continuous intravenous infusion (1 mg/kg over 24 h) with supplemental intramuscular doses.
• Monitoring of pain levels and respiratory rates.

Main Results:

• Only 26% of patients required more than two additional intramuscular doses.
• Infusion discontinuation occurred in 71 patients, primarily due to low respiratory rates.
• Older patients were more likely to experience respiratory depression (P < 0.01).

Conclusions:

• Continuous intravenous morphine infusion is an effective and inexpensive method for postoperative pain management.
• The technique is safe and easy to implement in general surgical wards with adherence to specific protocols.
• Close monitoring of respiratory rates is essential, particularly in elderly patients.