Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · Feb 2008
Clinical TrialBronchoscopic suctioning may cause lung collapse: a lung model and clinical evaluation.
To assess lung volume changes during and after bronchoscopic suctioning during volume or pressure-controlled ventilation (VCV or PCV). ⋯ Suction flow through the bronchoscope at the vacuum levels commonly used is well above minute ventilation in most ALI patients. The ventilator was unable to deliver enough volume in either VCV or PCV to maintain FRC and tracheal pressure decreased below atmospheric pressure.
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Acta Anaesthesiol Scand · Feb 2008
Brain natriuretic peptide is a good predictor for outcome in cardiac surgery.
The heart secretes brain natriuretic peptide (BNP) in response to myocardial stretch. The aim of this study was to determine whether adverse effects after cardiac surgery were associated with higher serum BNP levels pre-operatively. ⋯ Serum NT-pro-BNP is a good predictor for complications after cardiac surgery, and is as good as euroSCORE and better than EF.
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Acta Anaesthesiol Scand · Feb 2008
Case ReportsBurst suppression during propofol anaesthesia recorded from scalp and subthalamic electrodes: report of three cases.
Measurement of slow EEG activity and burst suppression are the main tasks in monitoring the effects of anaesthestics with EEG, which is often done with commercial univariate indexes such as BIS. The aim of this study was to describe the characteristics of burst suppression EEG during propofol anaesthesia using scalp electrodes and depth electrodes in the subthalamic nucleus. Specifically, we describe the electrical fields of the three EEG patterns we have previously described: the sharp wave, the burst and the spindle. ⋯ Recording simultaneously EEG from the depth and scalp electrodes shows that bursts and their slow wave oscillations are synchronous in the whole cortex while spindles and sharp waves are produced by the sensorimotor cortex. The amplitude of slow waves recorded with surface electrodes is equal to the difference of the wave at two electrodes and therefore only a small part of that generated by the cortex.
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Acta Anaesthesiol Scand · Feb 2008
Reduced blood pressure lability during emergence from anaesthesia in rats: a pilot study using clonidine.
In the post-operative setting, pressure lability is increased in hypertensive patients. alpha-2 agonists were shown qualitatively to reduce this lability qualitatively. Here, upon immobilization combined with emergence from anesthesia in rats and clonidine administration, pressure lability was quantitatively assessed and related to baroreflex sensitivity. ⋯ Clonidine reduces pressure lability upon immobilization stress combined to emergence from anesthesia, via parasympathetic activation and possibly sympathetic inhibition during early emergence as opposed to sympathetic inhibition during late emergence.