Best practice & research. Clinical anaesthesiology
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Best Pract Res Clin Anaesthesiol · May 2022
ReviewSpinal hypotension in obstetrics: Context-sensitive prevention and management.
Spinal hypotension during caesarean section remains a common complication, with important attendant maternal and fetal adverse outcomes. Research elucidating the mechanisms of spinal hypotension has led to the development and refinement of effective management strategies, with a particular emphasis on prophylactic vasopressor administration. This has proved effective in well-resourced settings, with maternal comfort and the elimination of nausea now considered the primary aim of treatment. ⋯ Translational, context-sensitive research in resource-limited settings has shown promise in implementing pragmatic strategies based on research from resource-rich environments. We review the current best practice for the prevention and treatment of spinal hypotension, with a special emphasis on effective strategies in resource-limited settings. We further suggest a research agenda to address the knowledge gap in specific contexts.
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Leading causes of intensive care unit (ICU) admission include hemorrhage, hypertensive disorders of pregnancy, and sepsis. Although the incidence of ICU admission in pregnancy may be low, this does not account for critical illness in labor and delivery or maternity unit suites, which is as high as 1-3%. ⋯ Recently, comorbidity-based screening tools, which quantify a patient's medical comorbidity burden, have been developed and validated in predicting ICU admission and death. Noninvasive ultrasonography such as point-of-care ultrasonography becomes essential in determining hemodynamic status, guides resuscitation, and manages cardiovascular dysfunction.
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Preeclampsia is a severe manifestation of maternal hypertensive disease affecting 2-8% of pregnancies. The disease places women at risk of women at risk of life-threatening events, including cerebral hemorrhage, pulmonary edema, acute kidney injury, hepatic failure or rupture, disseminated intravascular coagulation, eclampsia, and placental abruption. ⋯ Magnesium therapy for seizure prophylaxis and blood pressure control to limit cardiovascular and cerebrovascular morbidity are the cornerstone of treatment. Interdisciplinary planning and management are crucial to optimizing patient outcomes.
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Best Pract Res Clin Anaesthesiol · May 2022
ReviewNeuraxial and general anaesthesia for caesarean section.
Caesarean section (CS) is one of the most performed operations worldwide. In many parts of the world, there has been a reduction in anaesthetic associated obstetric mortality, and this has been attributed to the increased use of neuraxial anaesthesia and improved safety of general anaesthesia, alongside improved training and organisational changes. In resource-limited countries, anaesthesia contributes disproportionately to maternal mortality, with one in seven deaths being due to anaesthesia. ⋯ For elective CS, spinal and combined-spinal anaesthesia predominate. General anaesthesia is mainly reserved for Category 1 CS where there is an immediate threat to the life of the mother or the baby. This review discusses the practical aspects of neuraxial and general anaesthesia for CS.
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Best Pract Res Clin Anaesthesiol · May 2022
ReviewNeuraxial labor analgesia: Maintenance techniques.
Since the advent of neuraxial analgesia for labor, approaches to maintaining intrapartum pain relief have seen significant advancement. Through pharmacologic innovations and improved drug delivery mechanisms, current neuraxial labor analgesia maintenance techniques have been shaped by efforts to maximize patient comfort during the birthing process, while minimizing undesirable side effects and promoting the unimpeded progress of labor. ⋯ We explore the historical development and the evidential underpinnings of these techniques, in addition to several contemporary neuraxial labor analgesia practices. We also summarize current understanding of the effects these interventions have on maternal/fetal health and the labor course, as well as several important aspects of analgesic safety and monitoring.