BACKGROUND Optogenetic tools enable cell selective and temporally precise control of neuronal activity; yet, difficulties in delivering sufficient light to the spinal cord of freely behaving animals have hampered the use of spinal optogenetic approaches to produce analgesia. We describe an epidural optic fiber designed for chronic spinal optogenetics that enables the precise delivery of light a...

nimodipine, an l-type calcium channel blocker, can induce analgesia. however, it is not clear that this analgesic effect is at the level of spinal or supraspinal pain pathway. in addition, it has been reported that the analgesic effect of nifedipine, another l-type calcium channel blocker is related to the hpa axis, but there is no report indicating the role of this axis in the analgesic effect...

To the Editor:—In his editorial, Eisenach highlighted an interesting paradox; while attempting to produce profound analgesia with high doses of potent opioids, it is possible to produce a “preemptive hyperalgesic” effect. In the two human studies referenced, high doses of systemic remifentanil and fentanyl produced acute hyperalgesia. In a previous human study, we found evidence that intratheca...

Amongst the spinal peptide candidates believed to be involved in the mediation of analgesia, only somatostatin fulfills the criterium of a real analgesia substance. Spinal somatostatin specifically blocks the transmission of painful stimuli. Spinal calcitonin may lower the opioid dose requirement in patients with bone metastases but it fails to relieve acute pain. The usefulness of ACTH and CRF...

Postoperative paraplegia is a rare complication after epidural analgesia and often occurs with spinal hematoma or cord injury. We present the case of a 16-year-old girl who suffered from a tumor mass in the neck and abdomen who underwent gynecologic operation. Preoperatively, liver metastasis was found by computed tomography. Pathologic findings revealed that the abdominal mass was an ovarian d...

Background: Spinal anesthesia is the most common neuraxial for infraumblical surgeries. The use of various adjuvants has become popular in today’s scenario to enhance its quality. Aims and Objectives: aim this study was evaluate onset, duration sensory motor block, hemodynamic effects (if any), post-operative analgesia, adverse fentanyl or magnesium given intrathecally with 0.5% bupivacaine hea...

Objective: To evaluate and compare the characteristics of spinal block, its postoperative analgesic effects, using intrathecal inj. Bupivacaine 0.5% and its combination with nalbuphine or buprenorphine in patients undergoing lower abdominal surgery. Methods: Sixty patients aged 30-60years scheduled for elective lower abdominal surgeries randomly received hyperbaric bupivacaine 0.5% 2.6 ml (grou...

PURPOSE Pregnancy-induced analgesia develops during late pregnancy, but it is unclear whether this analgesia is effective against neuropathic pain. The detailed molecular mechanisms underlying pregnancy-induced analgesia have not been investigated. We examined the antinociceptive effect of pregnancy-induced analgesia in a neuropathic pain model and the expression of tumor necrosis factor (TNF)-...

UNLABELLED Very small doses of intrathecal (i.t.) morphine (25-200 microg) have been used in an effort to provide effective postoperative pain relief while minimizing side effects after cesarean delivery. We performed a double-blinded study in 40 patients presenting for elective cesarean delivery in which i.t. morphine was administered along with oral hydrocodone/acetaminophen and other medicat...

BACKGROUND Despite the growing popularity of combined spinal-epidural analgesia in laboring women, the exact role of intrathecal opioids and the needle-through-needle technique remains to be determined. The authors hypothesized that anesthetic technique would have little effect on obstetric outcome or anesthetic complications. METHODS Data were prospectively collected from 2,183 laboring wome...