Comparing caudal and intravenous ketamine for supplementation of analgesia after Salter innominate osteotomy

Sub-anesthetic intravenous ketamine vs. caudal bupivacaine for postoperative analgesia in children undergoing infra-umbilical surgeries: a non-inferiority randomized single-blind controlled trial

Background

Sub-anesthetic iv ketamine acts as an analgesic and has opioid-sparing effects, particularly for acute postoperative pain. Primary aim of this study was to evaluate the non-inferiority of sub-anesthetic iv ketamine vs caudal bupivacaine for postoperative analgesia in children.

Methods

Children below six years were enrolled in this single-blind study and randomized to receive either sub-anesthetic iv ketamine (0.3 mg/kg) or 1 ml/kg of caudal 0.125% bupivacaine, along with general anesthesia. Postoperative pain was assessed with the FLACC scale at 30 minutes, and at one, two, three, and six hours. Intra and postoperative opioid consumption, time to extubation, postoperative vomiting (POV), postoperative agitation, sedation, and inflammatory markers (serum IL-6 and TNF-α) were also assessed.

Results

One hundred and forty-one children completed the study, 71 in the ketamine and 70 in the caudal group. The cumulative proportion of children without significant postoperative pain (FLACC score < 4) until six hours post-surgery was 45.1% in the ketamine group vs 72.9% in the caudal group (P < 0.001). More children required an additional dose of intraoperative fentanyl (33.8% vs 5.7%; P < 0.001) and postoperative tramadol (54.9% vs. 27.1%; P < 0.001) in the ketamine group. Postoperative agitation, (4.3% vs. 9.9%; P = 0.19) and sedation (32.8% vs 22.5%; P = 0.17) were similar in the groups. Time to extubation, POV, baseline and post-surgical inflammatory markers were comparable.

Conclusions

Sub-anesthetic ketamine is inferior to caudal bupivacaine for postoperative analgesia in children below six years undergoing infra-umbilical surgeries but results in similar postoperative outcomes.

Does the addition of tramadol and ketamine to ropivacaine prolong the axillary brachial plexus block?

Background and Objectives. A prospective, randomized, controlled, double-blind clinical trial to assess the effect of tramadol and ketamine, 50 mg, added to ropivacaine in brachial plexus anesthesia. Methods. Thirty-six ASA physical statuses I and II patients, between 18 and 60 years of age, scheduled for forearm and hand surgery under axillary brachial plexus block, were allocated to 3 groups. Group R received 0.375% ropivacaine in 40 mL, group RT received 0.375% ropivacaine in 40 mL with 50 mg tramadol, and group RK received 0.375% ropivacaine in 40 mL with 50 mg ketamine for axillary brachial plexus block. The onset times and the duration of sensory and motor blocks, duration of analgesia, hemodynamic parameters, and adverse events (nausea, vomiting, and feeling uncomfortable) were recorded. Results. The onset time of sensorial block was the fastest in ropivacaine + tramadol group. Duration of sensorial and motor block was the shortest in the ropivacaine + tramadol group. Duration of analgesia was significantly longer in ropivacaine + tramadol group. Conclusion. We conclude that when added to brachial plexus analgesia at a dose of 50 mg, tramadol extends the onset and duration time of the block and improves the quality of postoperative analgesia without any side effects.