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The aim of this study is to assess the efficacy and potency of lidocaine infusion as a preventive measure on pruritus response after injection of 200 micro gram morphine with bupivacaine subarachnoid block, spinal anesthesia, in cesarean section.
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Neuraxial opioids (NO) are one of the most widely used methods for postpartum analgesia, for cesarean section analgesia, and many other surgical procedures.
The pruritus induced by NO is an unpleasant, subjective, and irritating sensation that causes scratching response.
Pruritus begins shortly after anesthesia, with the onset depending on the type, route and dosage of opioid used. Pruritus invoked by lipid-soluble opioids such as fentanyl and sufentanil is of shorter duration, and the use of the minimum or small dose from opioids in addition of local anesthetics seems to decrease the prevalence and the severity of itching. Pruritus invoked by intrathecal morphine is of longer duration and is difficult to treat. Intrathecal administration, of opioids reach peak concentrations in the cerebrospinal fluid almost immediately. ]. But, after epidural administration, there is a delay in the rise to peak concentration (10-20 min with fentanyl and 1-4 h with morphine).
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136 participants in 2 patient groups, including a placebo group
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Ayman M Eldemrdash, MD
Data sourced from clinicaltrials.gov
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