title: A comparison of SNAP II and bispectral index monitoring in patients undergoing sedation.
abstract: Clinical signs and patients' verbal responses have traditionally been used to assess patients' comfort and the depth of sedation. Recently, level-of-consciousness monitors have been used to guide sedation. The SNAP II(c) is a single-lead electroencephalogram device that displays a SNAP(c) Index - a derived value based on both high and low frequency electroencephalogram signals. Much of the current clinical research on monitoring during sedation involves the bispectral index monitor. We compared simultaneous readings recorded by the SNAP II and bispectral index during sedation in 51 consecutive patients undergoing surgery. The anaesthesia team was blinded to the SNAP II and bispectal index values. Concurrent SNAP II and bispectral index readings displayed similarly-shaped trajectories during sedation, but further studies are needed to establish the routine clinical utility of both these monitors.
authors.affiliation: Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Springman
authors.forename: A-C
authors.initials: AC
authors.lastname: Andrei
authors.forename: K
authors.initials: K
authors.lastname: Willmann
authors.forename: D A
authors.initials: DA
authors.lastname: Rusy
authors.forename: M E
authors.initials: ME
authors.lastname: Warren
authors.forename: S
authors.initials: S
authors.lastname: Han
authors.forename: M
authors.initials: M
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000556:Ambulatory Surgical Procedures; D016292:Procedural Sedation / Q000295:instrumentation* / Q000379:methods; D056805:Consciousness Monitors; D004569:Electroencephalography / Q000295:instrumentation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D055815:Young Adult