Postoperative titration of intravenous morphine in the elderly patient

Background: intravenous morphine titration is used to obtain rapid and complete postoperative pain relief. Whether this titration can be safely administered in the elderly patients remains a matter for debate. Methods. Intravenous morphine titration was administered as a bolus of 2 (body weight less than or equal to 60 kg) or 3 (body weight > 60 kg) mg. The interval between each bolus was 5 min. There was no limitation in the number of boluses given until pain relief or severe adverse effect occurred. The visual analog scale threshold required to administer morphine was 30 nun, and pain relief wits defined as a visual analog scale score of 30 min or less. Patients were divided into two groups: young and elderly (age greater than or equal to 70 yr) patients. Data were expressed as mean +/- SD. Results: Fight hundred seventy-five patients (83%) were young and 175 patients were elderly. At the end of morphine titration, the visual analog scale score and the number of patients with pain relief were not significantly different between groups. The total dose of morphine per kilograms of body weight administered was not significantly different between groups (0-15 +/- 0.10 vs. 0.14 +/- 0.09 mg/kg, not significant). No significant differences were observed in the incidence of morphine related adverse effects (13 vs. 14%, not significant), the number of sedated patients (60 is. 60%, not significant), and the number of patients whose titration had to be stopped (2 vs. 2%, not significant). Conclusion: Intravenous morphine titration can be safely administered to elderly patients. Because titration Is adapted to individual pain, the same. protocol can be applied to young and elderly patients.