Use of the bispectral index during the early postresuscitative phase after out-of-hospital cardiac arrest |
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Authors: | Shigehiro Shibata Tsuyoshi Imota Souhaku Shigeomi Wakana Sato Keiji Enzan |
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Institution: | (1) Department of Critical Care Medicine, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan;(2) Department of Neurology, Akita City Hospital, Akita, Japan;(3) Department of Anesthesiology, Akita City Hospital, Akita, Japan |
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Abstract: | Non-invasive and real-time measures of neurological status after cardiac arrest are needed to be able to make an early determination of the postresuscitative outcome. We investigated whether the bispectral index (BIS) predicts the postresuscitative outcome in 10 patients with out-of-hospital cardiac arrest. We measured the BIS after return of spontaneous circulation (ROSC) in the emergency room and on admission to the intensive care unit (ICU). We determined the Glasgow Coma Scale (GCS) on admission to the emergency room and the ICU and the Glasgow Outcome Scale (GOS) on discharge from the ICU. The BIS increased after about 30 min of ROSC or reached a plateau in patients rated as achieving a good recovery or moderate disability, but it did not increase to >80 in patients rated as being in a permanent vegetative state/dead. The GCS on admission to the ICU was the same as that on admission to the emergency room. The BIS values were significantly lower in the nonsurviving group than in the surviving group. There was a positive correlation between the BIS on admission to the ICU and the GOS on discharge from the ICU. The BIS can thus be used to predict the postresuscitative outcome of patients with out-of-hospital cardiac arrest. |
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Keywords: | Bispectral index Out-of– hospital Glasgow Outcome Scale Glasgow Coma Scale |
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