A comparison of frontal and occipital bispectral index values obtained during neurosurgical procedures |
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Authors: | Shiraishi Toshie Uchino Hiroyuki Sagara Takeshi Ishii Nagao |
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Affiliation: | Department of Anesthesiology, Tokyo Medical University, Hachioji Medical Center, 1163 Tate-machi, Hachioji-shi, Tokyo 193-0998, Japan. toshi-s@tokyo-med.ac.jp |
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Abstract: | We placed bispectral index (BIS) sensors on the frontal and occipital areas of neurosurgical patients and compared BIS values obtained from both areas during propofol/fentanyl anesthesia. BIS showed a strong correlation between frontal and occipital montages (r(2) = 0.96; P = 0.03). It may be valid to measure BIS with the sensor on the occipital area if required during frontal neurosurgical procedures. IMPLICATIONS: Bispectral values were positively correlated when recorded from frontal and occipital sensors in patients undergoing clipping of unruptured cerebral aneurysms while anesthetized with propofol and fentanyl. |
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