Anesthesiology clinics
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Major obstetric hemorrhage remains the leading cause of maternal mortality and morbidity worldwide, and is associated with a high rate of substandard care. A well-defined and multidisciplinary approach that aims to act quickly and avoid omissions or conflicting strategies is key. The most common etiologies of hemorrhage are abruptio placenta, placenta previa/accreta, uterine rupture in the antepartum period and retained placenta, uterine atony, and genital-tract trauma in the postpartum period. ⋯ The two main options are radiologic embolization and surgical artery ligations. Recombinant factor VIIa may also be considered, but should not delay the performance of a life-saving procedure such as embolization or surgery. Hysterectomy must be implemented when all other interventions have failed.
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Maternal deaths in developed countries continue to decline and are rare. Maternal mortality statistics are essentially similar in the United States and United Kingdom. However, the situation is completely different in developing countries, where maternal mortality exceeds 0.5 million every year. This article not only assesses morbidity risks in some of the leading causes of maternal death but also highlights strategies to minimize the risks and to prevent maternal morbidity and mortality.
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Hypotension is a common, treatable side effect of neuraxial anesthesia, which has significant side effects for the mother and demonstrable biochemical effects in the fetus. It is clear that a shift in management of hypotension in the obstetric population is in order, but we can only speculate on the benefits for the compromised fetus due to the lack of available information in that patient population.
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Although maternal mortality resulting from anesthesia is declining, airway causes predominate. Although there are many physiologic and nonphysiologic factors that contribute to potential difficulties when intubating parturients, whether or not the maternal airway is more difficult anatomically continues to be debatable. ⋯ Vigilance, avoidance, and preparation continue to be key to management. In cases of unexpected difficulty, which likely are unavoidable, several rescue devices may be helpful.
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Infection is the commonest cause of serious neurologic sequelae of neuraxial anesthesia. The incidence depends on operator skill and patient population. Meningitis, a complication of dural puncture, is usually caused by viridans streptococci. ⋯ Epidural abscess is a complication of epidural catheterization, route of entry the catheter track and the organism usually the staphylococcus. Principal risk factors are prolonged catheterization, poor aseptic technique and traumatic insertion. Prevention includes wearing a mask, using a full sterile technique, avoiding prolonged catheterization and prescribing antibiotics in a high-risk situation.