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Postoperative respiratory function in children after abdominal surgery. A comparison of epidural and intramuscular
E Chabas1, C Gomar, A Villalonga
1Department of Anaesthesia, Hospital Clinic, Barcelona, Spain.
Insights
Epidural morphine offered better pain relief than intramuscular morphine in children after surgery. However, neither method significantly improved postoperative respiratory function, suggesting other factors beyond pain affect lung recovery.
Area of Science:
- Pediatric Surgery
- Anesthesiology
- Respiratory Physiology
Background:
- Postoperative pain management is crucial for pediatric surgical patients.
- Respiratory complications can significantly impact recovery after abdominal and urological surgery.
- Optimizing pain relief may improve pulmonary outcomes.
Purpose of the Study:
- To compare the effects of epidural versus intramuscular morphine on postoperative respiratory function in children.
- To assess the quality of analgesia provided by each morphine administration route.
- To investigate the factors influencing pulmonary recovery after surgery.
Main Methods:
- Randomized trial involving 30 children undergoing urological and abdominal surgery.
- Measurement of forced vital capacity (FVC) and forced expired volume in 1 second (FEV1) preoperatively and for seven days postoperatively.
- Comparison of respiratory function and pain scores between epidural and intramuscular morphine groups.
Main Results:
- Significant decreases in FVC and FEV1 were observed post-surgery in all patients (p < 0.01).
- Pulmonary function gradually recovered but did not reach pre-operative levels within the study period.
- No significant differences in FVC or FEV1 were found between the epidural and intramuscular morphine groups.
- Epidural morphine provided superior analgesia compared to intramuscular administration.
Conclusions:
- While epidural morphine enhances analgesia, neither administration route fully restores postoperative pulmonary function.
- Factors other than pain, potentially including surgical trauma or inflammation, contribute to respiratory impairment.
- Further research is needed to address the incomplete recovery of respiratory function in pediatric surgical patients.
Abstract:
Thirty children undergoing urological and abdominal surgery were entered into a randomised trial comparing the effects of epidural and intramuscular morphine on postoperative respiratory function. The forced vital capacity and the forced expired volume in 1 s were measured before and 6 h after surgery and on each of the following seven days. Significant decreases (p < 0.01) in forced vital capacity and forced expired volume in 1 s were seen after surgery. After the first postoperative day, a gradual recovery in pulmonary function was observed but the measured parameters had not returned to their pre-operative control values by the end of the study. There were no statistically significant differences between the two groups during the study with respect to forced vital capacity and forced expired volume in 1 s. The quality of analgesia was better in the epidural morphine group than in the intramuscular morphine group. The incomplete recovery of pulmonary function suggests that pain is not the only cause of postoperative respiratory changes in these patients.