Anesthesia and analgesia
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Anesthesia and analgesia · Feb 2012
Propofol protects against high glucose-induced endothelial dysfunction in human umbilical vein endothelial cells.
Hyperglycemia, via peroxynitrite-mediated endothelial nitric oxide synthase (eNOS) enzymatic uncoupling, induced endothelial dysfunction. Propofol has been reported to improve high glucose-induced endothelial dysfunction. However, its mechanisms of action remain unclear. We hypothesized that propofol could improve hyperglycemia-induced endothelial dysfunction by decreasing the peroxynitrite level and thus restoring eNOS coupling. ⋯ Propofol has beneficial effects on 30 mM glucose-induced NO reduction and O(2)(·-) accumulation in human umbilical vein endothelial cells. This may be mediated through inhibiting peroxynitrite-mediated BH(4) reduction, and restoring eNOS coupling.
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Anesthesia and analgesia · Feb 2012
Randomized Controlled Trial Multicenter Study Comparative StudyThe effects of isoflurane and desflurane on cognitive function in humans.
This small, pilot study suggests that isoflurane may be more commonly associated with post-operative cognitive dysfunction than desflurane in older patients.
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Anesthesia and analgesia · Feb 2012
Oxytocin inhibits the membrane depolarization-induced increase in intracellular calcium in capsaicin sensitive sensory neurons: a peripheral mechanism of analgesic action.
Lumbar intrathecal injection of oxytocin produces antinociception in rats and analgesia in humans. Classically, oxytocin receptors couple to stimulatory G proteins, increase inositol-3-phosphate production, and result in neuronal excitation. Most work to date has focused on a spinal site of oxytocin to excite γ-aminobutyric acid interneurons to produce analgesia. Here we ask whether oxytocin might also affect primary sensory afferents by modulating high voltage-gated calcium channels, such as it does in the brain. ⋯ These data suggest that oxytocin produces antinociception after intrathecal delivery in part by reducing excitatory neurotransmitter release from the central terminals of nociceptors.
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Anesthesia and analgesia · Feb 2012
Review Meta AnalysisPerioperative single dose ketorolac to prevent postoperative pain: a meta-analysis of randomized trials.
Preventive analgesia using non-opioid analgesic strategies is recognized as a pathway to improve postoperative pain control while minimizing opioid-related side effects. Ketorolac is a nonsteroidal antiinflammatory drug frequently used to treat postoperative pain. However, the optimal dose and route of administration for systemic single dose ketorolac to prevent postoperative pain is not well defined. We performed a quantitative systematic review to evaluate the efficacy of a single dose of perioperative ketorolac on postoperative analgesia. ⋯ Single dose systemic ketorolac is an effective adjunct in multimodal regimens to reduce postoperative pain. Improved postoperative analgesia achieved with ketorolac was also accompanied by a reduction in postoperative nausea and vomiting. The 60-mg dose offers significant benefits but there is a lack of current evidence that the 30-mg dose offers significant benefits on postoperative pain outcomes.
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Anesthesia and analgesia · Feb 2012
Randomized Controlled Trial Comparative StudyContinuous epicapsular ropivacaine 0.3% infusion after minimally invasive hip arthroplasty: a prospective, randomized, double-blinded, placebo-controlled study comparing continuous wound infusion with morphine patient-controlled analgesia.
In this study, we investigated the impact of a continuous wound infusion with ropivacaine 0.3% on pain and morphine consumption after minimally invasive hip arthroplasty. ⋯ Continuous epicapsular wound infusion with ropivacaine 0.3% after minimally invasive hip replacement is an efficient technique for reducing morphine consumption and improving the quality of postoperative analgesia. The beneficial effects of this technique are still present 3 months after surgery.