[en] The effects of two calculated plasma sufentanil (SUF) concentrations on the hemodynamic and bispectral index (BIS) responses to Mayfield head holder (MH) application were studied in 20 patients scheduled for intracranial surgery. Premedication consisted of hydroxyzine, alprazolam, and atropine given orally 1 hour before surgery. Anesthesia was provided with propofol (PPF) and SUF using a target-controlled infusion device. Patients were randomly assigned to one of two groups according to calculated plasma concentrations: 3 microg/mL(-1) of PPF and 0.5 ng/mL(-1) of SUF in group I (GI) and 3 microg/mL(-1) of PPF and 1 ng/mL(-1) of SUF in group II (GII). The MH was fixed 33.0+/-6.6 minutes (mean +/- SD) after induction. Systolic (SAP), diastolic (DAP), and mean arterial pressure (MAP) as well as heart rate (HR) and BIS were recorded 1 minute before pinning (baseline) as well as 1 minute (P1), 2 minutes (P2), and 3 minutes (P3) after pinning. Multivariate repeat-measured analyses of variance were applied to the baseline-subtracted measurements of hemodynamic and BIS values. Groups were compared using the Student's t test, and P < .05 was considered to be statistically significant. Patients' characteristics, baseline hemodynamic values, and BIS values were similar in both groups. A significant overall time effect was observed for all variables, but no significant overall SUF effect was detected. Increases in SAP, MAP, DAP, and HR did not differ significantly between groups. The increase in hemodynamic variables did not exceed 20% of baseline value in either group. In contrast, at P1, the increase in BIS over the baseline value was significantly higher in GI (15.0+/-7.9) than in GII (6.7+/-6.5). In conclusion, MH application was associated with a significant, although not clinically relevant, increase in hemodynamic variables whatever the calculated plasma SUF concentration (0.5 or 1.0 ng/mL(-1)). In contrast, the increase in BIS observed at pinning was significantly higher in patients with the lowest calculated plasma SUF concentrations. This suggests that the BIS response to noxious stimulation is modulated by the analgesic regimen.
Disciplines :
Anesthesia & intensive care
Author, co-author :
Hans, Pol ; Université de Liège - ULiège > Département des sciences cliniques > Anesthésie et réanimation
BRICHANT, Jean-François ; Centre Hospitalier Universitaire de Liège - CHU > Département d'Anesthésie et réanimation > Service d'anesthésie - réanimation
DEWANDRE, Pierre-Yves ; Centre Hospitalier Universitaire de Liège - CHU > Département d'Anesthésie et réanimation > Service d'anesthésie - réanimation
Born, J. D.
Lamy, Maurice ; Université de Liège - ULiège > Département des sciences cliniques > Département des sciences cliniques
Language :
English
Title :
Effects of Two Calculated Plasma Sufentanil Concentrations on the Hemodynamic and Bispectral Index Responses to Mayfield Head Holder Application
Publication date :
April 1999
Journal title :
Journal of Neurosurgical Anesthesiology
ISSN :
0898-4921
eISSN :
1537-1921
Publisher :
Lippincott Williams & Wilkins, United States - Maryland
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