effective bolus dose of sufentanil to attenuate cardiovascular responses in laryngoscopic double-lumen endobronchial intubation

conclusions we found that 0.3 mcg/kg of sufentanil attenuates cardiovascular responses to double-lumen endobronchial intubation without adverse effects. background sufentanil is a potent opioid analgesic frequently used in clinical anesthesia. double-lumen endobronchial intubation induces profound cardiovascular responses in comparison with ordinary endotracheal intubation because of the larger tube diameter and direct irritation of the carina. objectives the purpose of this study was to determine the effective bolus dose of sufentanil to attenuate hemodynamic changes in response to laryngoscopic double-lumen endobronchial intubation. patients and methods we randomly assigned 72 patients aged 18 - 65 years and with an american society of anesthesiologists physical status of 1 or 2 to one of four sufentanil dose groups: ns, s0.1, s0.2, or s0.3. the respective doses for the groups were as follows: normal saline, 0.1 mcg/kg of sufentanil, 0.2 mcg/kg of sufentanil, and 0.3 mcg/kg of sufentanil. blood pressure and heart rate were recorded during the pre-anesthesia period at baseline, pre-intubation, immediate post-intubation, and every minute during 5 minutes after intubation. results baseline mean arterial pressures in the ns, s0.1, s0.2, and s0.3 groups were 89.8 ± 12.1, 89.2 ± 10.9, 88.8 ± 13.6, and 90.7 ± 11.1, respectively. at immediate post-intubation, the mean arterial pressures in the ns, s0.1, s0.2, and s0.3 groups were 129.7 ± 14.7, 120.7 ± 14.2, 120.8 ± 17.2, and 96.7 ± 10.4, respectively. at immediate post-intubation, the mean arterial pressure in the ns, s0.1, and s0.2 groups significantly increased from baseline (p < 0.001), but the s0.3 group showed no difference. in the time point comparison at immediate post- intubation, the s0.3 group had a significantly lower mean arterial pressure than did the ns, s0.1, and s0.2 groups (p < 0.001).