Best practice & research. Clinical anaesthesiology
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Best Pract Res Clin Anaesthesiol · May 2022
ReviewNeuraxial labor analgesia: Initiation techniques.
The ideal technique for labor analgesia would have a quick onset, predictable quality, and adjustable depth and duration. Moreover, it would be easy to perform and have minimal maternal and fetal side effects. A catheter-based neuraxial approach encompasses these desirable characteristics and includes the epidural, combined spinal epidural, dural puncture epidural, and intrathecal catheter techniques. ⋯ The selection of neuraxial analgesia techniques should consider the patient and team's goals and expectations, the clinical context, and the institutional culture. Labor analgesic techniques that initiate with an intentional dural puncture component have a faster onset, greater bilateral and sacral spread, and lower rates of epidural catheter failure. Further elucidation of the mechanisms, benefits, and risks of each neuraxial initiation technique will continue to benefit patients and care providers.
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Best Pract Res Clin Anaesthesiol · May 2022
ReviewPlacenta accreta. A review of current anesthetic considerations.
Placenta accreta spectrum (PAS) is a potentially life-threatening disorder with unique anesthetic challenges, and its incidence has increased over the past decades. We review current guidelines and best practice evidence for antenatal diagnosis and preoperative evaluation, management pathways, multidisciplinary staff coordination, and surgery location. We address specific considerations for choice of anesthesia modality, the role of interventional radiology, and various techniques for minimizing hemorrhage for both planned and unplanned cases, as well as postoperative care for the PAS patient.
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In the developed world, cardiovascular disease has become the most frequent cause of death during pregnancy and postpartum, outnumbering by far obstetric causes of death such as bleeding or thromboembolism. Many factors contribute to this phenomenon, including an increasing age of pregnant women, co-morbidities, and an unhealthy lifestyle. ⋯ Profound knowledge of the cardiac pathophysiology is a prerequisite for the successful anaesthesiologic management of pregnant patients with cardiovascular disease. As there is no difference in general and regional anaesthesia regarding maternal outcomes, neuraxial anaesthesia using incremental techniques should be preferred for labour and (caesarean) delivery if not contraindicated by non-cardiac issues.
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Worldwide, the most performed surgical intervention is cesarean section. Hence, post-cesarean pain is a common problem with significant health and economic impact on the individual patient and society. ⋯ To facilitate recovery and temper the side effects of potent analgesic drugs such as opioids, multimodal analgesia is currently advocated, and clear international guidelines and recommendations have recently been described. In the present overview, we will discuss the most recent guidelines and evaluate various analgesic interventions.
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Best Pract Res Clin Anaesthesiol · Dec 2021
ReviewPrinciples for minimizing oxygen debt: can they translate to clinical application and improve outcomes?
Oxygen delivery is dependent on pulmonary gas exchange, cardiac output, blood oxygen-carrying capacity, and tissue oxygen extraction. Reduction in oxygen delivery or higher oxygen consumption can initiate complex protective cellular processes precipitating oxygen debt. In critically ill and potentially surgical patients, stress and consequent hormonal or metabolic changes can trigger oxygen debt which is associated with worse morbidity and mortality. ⋯ Furthermore, large heterogeneity in clinical trials assessing outcomes benefit of increasing oxygen delivery limits our ability to recommend goal directed fluid therapy aimed at increasing cardiac ouput or higher FiO2. To understand and prevent oxygen debt in critically ill and surgical patients, we need to develop continuous monitoring techniques to assess the balance of oxygen delivery and consumption. Furthermore, methods of increasing oxygen delivery like goal-directed fluid therapy, higher FiO2 and anemia prevention should be rigorously evaluated with focus on establishing outcomes benefit.