Failure to cite is failure to honor past achievement

Kudos to Mathews, et al. (1) for more widely disseminating the increased utility of the BIS monitor with trending EMG as a secondary trace. This information has been previously published. (2,3).

Barry L. Friedberg, M.D.
President, Goldilocks Anesthesia Foundation


1. Mathews DM, Clark L, Johansen J, et al. Increases in Electroencephalogram and Electromyogram Variability Are Associated with Increased Incidence of Intraoperative Somatic Response. Anes Analg 2012;114:759-770.
2. Friedberg BL: The effect of a dissociative dose of ketamine on the bispectral (BIS) index during propofol hypnosis. J Clin Anes 1999;11:4-7.
3. Friedberg BL: Propofol ketamine with bispectral (BIS) index monitoring chapter in Friedberg BL, ed.: Anesthesia in Cosmetic Surgery. Cambridge University Press, New York 1-13, 2007.