title: SNAP index and Bispectral index during different states of propofol/remifentanil anaesthesia.
abstract: The accuracy of the new SNAP index with the Bispectral index (BIS) to distinguish different states of propofol/remifentanil anaesthesia was compared in 19 female patients who were undergoing minor gynaecological surgery. Comparisons of the SNAP index, BIS, spectral edge frequency, mean arterial blood pressure and heart rate were performed. The ability of all parameters to distinguish between the steps of anaesthesia -awake vs. loss of response, awake vs. anaesthesia, anaesthesia vs. first reaction and anaesthesia vs. extubation - were analysed with the prediction probability. The prediction probability to differentiate between two interesting nuances of anaesthetic states -loss of response vs. first reaction - was calculated. Only the BIS showed no overlap between the investigated steps of anaesthesia. Both the SNAP index and BIS failed to differentiate the nuances of anaesthesia. The SNAP index and BIS were superior to mean arterial blood pressure and heart rate and spectral edge frequency in distinguishing between different steps of anaesthesia with propofol and remifentanil and provided useful additional information.
authors.affiliation: Department of Anaesthesiology, University Hospital Eppendorf, Hamburg, Germany. guschmid@uke.uni-hamburg.de
authors.forename: G N
authors.initials: GN
authors.lastname: Schmidt
authors.forename: P
authors.initials: P
authors.lastname: Bischoff
authors.forename: T
authors.initials: T
authors.lastname: Standl
authors.forename: G
authors.initials: G
authors.lastname: Lankenau
authors.forename: A
authors.initials: A
authors.lastname: Hellstern
authors.forename: C
authors.initials: C
authors.lastname: Hipp
authors.forename: J
authors.initials: J
authors.lastname: Schulte am Esch
mesh_terms: D000328:Adult; D000368:Aged; D000762:Anesthesia Recovery Period; D019162:Anesthetics, Combined / Q000494:pharmacology*; D018686:Anesthetics, Intravenous / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects; D004569:Electroencephalography / Q000187:drug effects* / Q000379:methods; D005260:Female; D013509:Gynecologic Surgical Procedures; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods*; D010880:Piperidines / Q000494:pharmacology*; D015742:Propofol / Q000494:pharmacology*; D000077208:Remifentanil
chemical_list: D019162:Anesthetics, Combined; D018686:Anesthetics, Intravenous; D010880:Piperidines; D000077208:Remifentanil; D015742:Propofol