International journal of obstetric anesthesia
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It is clear from animal studies that commonly used anesthetic agents affect early brain development both histologically and functionally. With human epidemiologic evidence suggesting an association between anesthesia and surgery early in life and late-onset learning disabilities, investigators have focused their attention on the subtle long-term effects of anesthesia exposure. Most obstetric anesthesia studies, however, have focused on either the teratogenic effects of anesthetic agents in the first trimester or on the neonatal status immediately after delivery. ⋯ Of concern though, is that these events are easily perturbed by environmental and pharmacological influences. New research studies have raised significant questions about the fetal impact of maternal anesthesia for non-obstetric and fetal surgery. This review summarizes the major findings in the field of developmental neurotoxicity of anesthetic agents, discusses the susceptibility of the fetal brain to anesthetic effects in a trimester-specific style, and outlines the pitfalls in extrapolating animal research to humans.
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Tramadol produces analgesic effects through both non-opioid and weak opioid activity and is commonly used to treat mild to moderate pain. It has been in use for over 30 years and has a well-established safety profile in the general population. Since tramadol is not licensed for use in pregnancy and lactation, there is limited clinical research on its use in this patient population. A systematic review was undertaken of articles published in English before June 2011, searching Pubmed, Medline, CINAHL, Embase and Cochrane databases using the terms 'tramadol and pregnancy', 'tramadol and breastfeeding', 'tramadol and lactation', and 'tramadol and neonate'.