J Andrzejowski

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UNLABELLED How does physiological sleep affect the Bispectral Index (BIS)? We collected electroencephalographic (EEG) data from five subjects during the early part of the night, comparing the changes in the BIS with the conventional EEG stages of sleep. We found that the BIS was a consistent marker of depth of sleep. Light sleep occurred at BIS values of(More)
Eight patients were given a propofol infusion until they no longer responded to loud verbal stimuli, a sedation score of two (modified Observer Assessment of Alertness and Sedation Scale). After receiving 15 microg of intravenous epinephrine, changes in sedation score and bispectral index (BIS) were observed. Mean pulse rate increased from 68 to 96 (SD 10)(More)
We report an unusual complication of percutaneous dilatational tracheostomy, in which the guide wire became lodged in the bronchial tree. The assistance of an expert bronchoscopist resulted in successful removal of a fractured J wire with no adverse sequelae for the patient. A subsequent incident has given insight into the mechanism of damage to the guide(More)
Editor—We report a case in which after a brain injury, a patient with a Glasgow coma scale (GCS) of 14 had an unexpectedly low bispectral index (BIS) of 55. This increased after an emergency decompressive craniectomy. A 29-yr-old, previously well, female developed sudden onset headache with vomiting and weakness. CT scans demonstrated a right frontal lobe(More)
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