Endogenous opioids released from leukocytes extravasating into injured tissue can interact with peripheral opioid receptors to inhibit nociception. Animal studies have shown that the homing of opioid-producing leukocytes to the injured site is…
Ninety-eight continuous postoperative epidurals were administered to 87 children. The patients were divided into two groups: group I included 63 cases in which a 0.0625-0.25% solution of bupivacaine was continuously administered; group II included 35…