Use of the Bispectral Index to Predict Eye Position of Children during General Anesthesia

Korean Journal of Ophthalmology : KJO
Koung Hoon KookDae Hee Kim

Abstract

To assess the relationship between eye position and anesthesia depth using the bispectral index (BIS) value, a parameter derived from electroencephalography data. We investigated the relationship between BIS value and eye position in 32 children who underwent surgery for epiblepharon under general anesthesia. BIS values were recorded continuously throughout the procedure (from induction to awakening). Eye positions were video-recorded and analyzed after surgery. The vertical position of each eye was scored according to its height in relation to the medial canthus. An eye position in which the upper eyelid covered one-third of the cornea was defined as a significant ocular elevation. The BIS value correlated inversely with the end-tidal concentration of each anesthetic agent, whereas it correlated positively with the eye elevation score (eye position = 0.014 × BIS + 0.699, p = 0.011). The mean eye position score was significantly greater in patients whose BIS values were over 65. Eleven patients (34.4%) had significant ocular elevation; their mean concurrent BIS value was 61.6. Two of these patients had elevation during surgery and 9 had elevation during emergence from anesthesia. We found that high BIS values were correlated wi...Continue Reading

References

Oct 1, 1977·American Journal of Ophthalmology·L Apt, S Isenberg
Oct 24, 2002·British Journal of Anaesthesia·L G KevinC Bolger
Jul 1, 1953·British Journal of Anaesthesia·J D SNOW
Oct 6, 2006·Current Opinion in Anaesthesiology·Arjunan Ganesh, Mehernoor F Watcha
Apr 7, 2009·Muscle & Nerve·Vedran DeletisDavid Misita

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BETA
sedation

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