Journal of anesthesia
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Journal of anesthesia · Dec 2020
Randomized Controlled TrialEffects of spinal anesthesia and sedation with dexmedetomidine or propofol on cerebral regional oxygen saturation and systemic oxygenation a period after spinal injection.
To evaluate changes in cerebral regional oxygen saturation (rSO2) after spinal anesthesia and compare the changes in rSO2 and systemic oxygenation between dexmedetomidine sedation and propofol sedation. ⋯ Spinal anesthesia decreased rSO2; however, the decline was not severe. Dexmedetomidine and propofol did not compromise cerebral oxygenation under spinal anesthesia. Nevertheless, MAP and SpO2 were more stable in dexmedetomidine sedation than in propofol sedation. Dexmedetomidine may be suitable for spinal anesthesia.
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Journal of anesthesia · Dec 2020
Case ReportsPostoperative outcomes in patients with treatment-emergent central sleep apnea: a case series.
Treatment-emergent central sleep apnea (TECSA) is a central sleep-related breathing disorder, characterized by either the persistence or emergence of central sleep apnea during the initiation of positive airway pressure therapy for obstructive sleep apnea. The purpose of this study was to review the perioperative course of patients diagnosed with TECSA. ⋯ Patients with TECSA have high rates of postoperative complications, characterized by an increased rate of unplanned intensive care admissions and both high 30-day readmission and mortality rates. When dealing with these patients perioperative physicians should implement an increased level of respiratory monitoring, and early postoperative use of their home prescribed non-invasive ventilation devices.
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Journal of anesthesia · Dec 2020
Why the natural frequency and the damping coefficient do not evaluate the dynamic response of clinically used pressure monitoring circuits correctly.
The dynamic response of pressure monitoring circuits must be evaluated to obtain true invasive blood pressure values. Since Gardner's recommendations in 1981, the natural frequency and the damping coefficient have become standard parameters for anesthesiologists. In 2006, we published a new dynamic response evaluation method (step response analysis) that can plot frequency spectrum curves instantly in clinical situations. We also described the possibility of the defect of the standard parameters. However, the natural frequency and the damping coefficient are considered the gold standard and are even included in a major anesthesiology textbook. Therefore, we attempted to clarify the issues of these parameters with easy-to-understand pressure waves and basic numerical formulae. ⋯ The natural frequency and the damping coefficient are inadequate for the dynamic response evaluation. These parameters are primarily obtained from the phase spectrum curve and not from the amplitude spectrum curve. We strongly recommend an evaluation using the amplitude spectrum curve with our step response analysis method. It is crucial to maintain an amplitude gain of 1 (input amplitude = output amplitude) in the pressure wave frequency range of 0-20 Hz.
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Journal of anesthesia · Dec 2020
Meta AnalysisComparison of colloid and crystalloid using goal-directed fluid therapy protocol in non-cardiac surgery: a meta-analysis of randomized controlled trials.
A few randomized controlled trials (RCTs) have compared crystalloid-based goal-directed fluid therapy (GDFT) with starch-based GDFT in patients undergoing major surgical procedures with conflicting results. In this meta-analysis, colloid-based GDFT was compared with crystalloid-based GDFT. ⋯ Colloids in goal-directed fluid therapy protocol does not offer any benefit over crystalloid-based goal-directed fluid therapy protocol in patients undergoing major non-cardiac surgical procedure.
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Journal of anesthesia · Dec 2020
Meta AnalysisThe analgesic efficacy of quadratus lumborum block in caesarean delivery: a meta-analysis and trial sequential analysis.
Quadratus lumborum block (QLB) has recently gained popularity for postoperative analgesia after cesarean delivery (CD) as it provides both visceral and somato-sensory blockade of the abdomen. Aim of this meta-analysis was to evaluate the analgesic potential of QLB after CD. ⋯ QLB significantly reduces opioid requirements in CD and may have analgesic effects lasting 24 h.