British journal of anaesthesia
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Radial artery applanation tonometry technology can be used for continuous non-invasive measurement of arterial pressure (AP). The purpose of this study was to evaluate this AP monitoring technology in intensive care unit (ICU) patients in comparison with invasive AP monitoring using a radial arterial catheter. ⋯ In ICU patients, MAP and DAP measurements obtained using radial artery applanation tonometry show clinically acceptable agreement with invasive AP determination with a radial arterial catheter. While the radial artery applanation tonometry technology also allows SAP measurements with high accuracy, its precision for SAP measurements needs to be further improved.
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Observational Study
Postoperative decrease in plasma sodium concentration after infusion of hypotonic intravenous solutions in neonatal surgery.
Hypotonic i.v. solutions can cause hyponatraemia in the context of paediatric surgery. However, this has not been demonstrated in neonatal surgery. The goal of this study was to define the relationship between infused perioperative free water and plasma sodium in neonates. ⋯ Hypotonic solutions and i.v. free water intake of more than 6.5 ml kg(-1) h(-1) are associated with reductions in postoperative plasma sodium measurements ≥4 mM. In the context of neonatal surgery, close monitoring of plasma sodium is mandatory. Routine use of hypotonic i.v. solutions during neonatal surgery should be questioned as they are likely to reduce plasma sodium.
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Editorial Historical Article
IV. History of anaesthesia in Colombia: periods of development.
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Anaesthetic agents may disrupt consciousness by inhibiting long-range synchronization of brain activity. In the current study, the patterns of widespread and spatially localized synchrony during anaesthesia are investigated using a measure called global field synchrony (GFS). ⋯ Significant frequency- and location-dependent changes in GFS were induced by anaesthetic administration, with more robust changes identified in the γ range. GFS can act as an aid for further and more detailed analysis regarding the particular combinations of frequency ranges and spatial locations that are most informative for the study of anaesthetic-induced unconsciousness.