De Pietri, L., Siniscalchi, A., Reggiani, A., Masetti, M., Begliomini, B., Gazzi, M., . . . Pasetto, A. (2006). The use of intrathecal morphine for postoperative pain relief after liver resection: A comparison with epidural analgesia. Anesthesia and Analgesia, 102, 1157–1163.
To determine if the intrathecal analgesia technique is not inferior to continuous epidural (EP) infusions for postoperative pain in patients undergoing liver resections
Patients who had epidural analgesia had catheters inserted at the T9-10 or T10-11 levels. Ropivacaine and morphine were injected prior to anesthesia. In the intrathecal group, a dural puncture was done at the L3-4 or L 5-6 level, and morphine and saline were injected prior to anesthesia. In the EP group analgesia was continued with ropivacaine. In both groups, patients could receive 1 mg boluses of morphine from a patient-controlled IV pump. A value of 10 mm was used to determine noninferiority. Assessments were done at four, eight, 12, 24, 36, and 48 hours.
PHASE OF CARE: Active antitumor treatment
Prospective noninferiority trial
The time to first morphine requirement was longer in the epidural group at all time points, and by 48 hours, morphine use in the intrathecal group was four times higher than in the epidural group (p < 0.001). Extubation time and recovery room time were significantly shorter in the epidural group (p < 0.05). The total amount of morphine required in the intrathecal group was higher (p < 0.01). No significant differences between the groups in postoperative pain scores were reported.
Although this study reported that a single dose of intrathecal preoperative analgesia was not inferior to epidural analgesia, other measures reflecting postoperative pain were in favor of epidural analgesia. A single preoperative dose of intrathecal morphine may be a viable alternative approach to manage acute pain.
The findings of this study suggested that a single intrathecal dose of morphine preoperatively can provide an alternative approach for the management of postoperative pain, which may be useful for patients in whom continuous epidural analgesia is not appropriate.