Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · May 2020
Review Meta AnalysisTopical application of ketamine to prevent postoperative sore throat in adults: a systematic review and meta-analysis.
Postoperative sore throat is a leading undesirable postoperative outcome. Ketamine is an N-methyl-d-aspartate receptor antagonist and its topical application is used for chronic pain and oral/throat indications. We conducted a systematic review to assess the efficacy of preoperative, topical ketamine application for preventing postoperative sore throat. ⋯ Preoperative, topical ketamine application may be more effective than non-analgesic methods in preventing postoperative sore throat. The number of studies did not suffice to determine the place of topical ketamine among agents to prevent postoperative sore throat.
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The distribution and elimination kinetics of the water volume in infusion fluids can be studied by volume kinetics. The approach is a modification of drug pharmacokinetics and uses repeated measurements of blood hemoglobin and urinary excretion as input variables in (usually) a two-compartment model with expandable walls. Study results show that crystalloid fluid has a distribution phase that gives these fluids a plasma volume expansion amounting to 50%-60% of the infused volume as long as the infusion lasts, while the fraction is reduced to 15%-20% within 30 minutes after the infusion ends. ⋯ Concentrated urine before and during infusion slows down the elimination of crystalloid fluid. Colloid fluids have no distribution phase, an intravascular persistence half-life of 2-3 hours, and-at least for hydroxyethyl starch-the ability to reduce the effect of subsequently infused crystalloids. Accelerated distribution due to degradation of the endothelial glycocalyx layer has not yet been demonstrated.
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Acta Anaesthesiol Scand · May 2020
Observational StudyCoagulation tests on admission correlate with mortality and morbidity in general ICU-patients: an observational study.
It is well known that low platelet count on admission to intensive care units (ICU) is associated with increased mortality. However, it is unknown whether prothrombin time (PT-INR) and activated partial thromboplastin time (APTT) on admission correlate with mortality and organ failure. Therefore, the aim of this study was to investigate whether PT-INR and APTT at admission can predict outcome in the critically ill patient after adjusting for severity of illness measured with Simplified Acute Physiology Score 3 (SAPS 3). ⋯ Activated partial thromboplastin time prolongation was associated with mortality and all morbidity outcomes except the DAF ventilator. PT-INR increase at admission was associated with DAF vasopressor and DAF ventilator. APTT and PT-INR at admission correlate with morbidity, which is not accounted for in the SAPS 3 model.
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Acta Anaesthesiol Scand · May 2020
Observational StudyProspective observational investigation of body habitus measurements and relationship to epidural depth in term pregnant women.
High body mass index (BMI) can predict difficult neuraxial block; however, fat distribution may also be important. The primary study aim was to identify body habitus and fat distribution measurements that correlated with ultrasound measured epidural depth. We hypothesized that measurements such as midarm and subscapular fatpad thicknesses and length of cervical spine may correlate better with ultrasound measured epidural depth than a global measure of BMI. ⋯ Measurements of body habitus and fat distribution were no better than measured BMI to anticipate greater ultrasound measured depth to epidural space. Clinical trial number: Non-interventional observational study, not registered.
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Acta Anaesthesiol Scand · May 2020
Impact of deep breathing on predictability of stroke volume variation in spontaneous breathing patients.
This study investigated the ability of stroke volume variation (SVV) during deep breathing to discriminate fluid responders among spontaneously breathing patients. ⋯ Deep breathing could improve the reliability of dynamic indices in spontaneously breathing patients.