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Objective To compare the EC50 of Propofol for inhibiting intubation response. Methods 80 cases un-derwent tracheal intubation general anesthesia, all patients were randomly divided into two groups. The general situ-ation between the two groups showed no significant difference. Except for Propofol, other anesthesia drugs infusion method and dosage were the same. Sequential determination the EC50 of Propofol which for inhibiting intubation re-sponse of each groups by up-and-down. Propofol target concentration of the first patient was set to 4 μg/ml, and ad-justed according to intubation stress response disappeared or not, concentration of two adjacent patients with ratio of 1.2. Results A group inhibited the cardiovascular responses of Propofol EC50 and 95%CI was 5.19 μg/ml (95%CI:4.88 ~ 5.50 μg/ml). B group inhibited the cardiovascular responses of Propofol EC50 and 95 %CI was 4.15μg/ml (95%CI:3.80~4.40μg/ml). The EC50 and 95% confidence interval of the B group were significantly lower than those of the A group ( P 0.05).Conclusion The EC50 and 95% confidence interval of Propofol for inhibiting intubation response under photopic laryngoscopes was significant lower than those of under direct laryngoscopes, the circulation during period of induc-tion and intubation was more stable.
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Objective To investigate the feasibility of Narcotrend-guided application of small dose of dexmedetomidine ( DEX) for sedation during combined spinal-epidural anesthesia for elderly patients. Methods Fifty cases of ASA II or Ⅲelderly patients were randomly divided into treatment group and control group (25 patients of each group). After combined spinal-epidural anesthesia, both groups received continuous intravenous infusion of DEX, at 0. 4 μg·kg-1 in 10 min, and then the rate was lowered to 0. 4 μg·kg-1 per hour. For the treatment group, infusion rate was adjusted to reach a Narcotrend Index (NTI) of 75-85, and for the control group, infusion rate was adjusted to reach an OAA/S score of level 3-4. MAP, HR, RR, SpO2 , NTI and OAA/S score were recorded at the beginning of DEX treatment ( t0 ) , 10 min ( t1 ) , 20 min ( t2 ) , 30 min ( t3 ) , and 60 min ( t4 ) after the beginning of DEX treatment, and at the end of surgery ( t5 ) . The incidence rates of adverse events including bradycardia, hypotension, low oxygenation, and respiratory depression were also recorded. The patients were followed up until 24 h after surgery to record loss of memory about the surgical events. Results In comparison with t0 , NTI and MAP of both groups significantly decreased at t1-t5(P0. 05). Follow-up at 24 h after surgery observed total amnesia in 72. 0% of DEX group patients and in 76. 0% of the control group, without significant difference (P>0. 05). Conclusion Sedating elderly patients undergoing spinal-epidural anesthesia with DEX under the guidance of Narcotrend is safe and feasible, and the patients can be sedated properly.
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Objective To investigate the postoperative epidural analgesia and adverse reactions in total abdominal hysterectomy with dezocine and ropivacaine.Methods Sixty elective transabdominal hysterectomy patients with American Society of Anesthesiologists (ASA) Ⅰ-Ⅱ grade were randomly divided into two groups,dezocine group and morphine group,there were 30 cases in each group.Dezocine group:dezocine (6 mg) + 0.75％ ropivacaine hydrochloride(20 ml) + saline dilution,diluted to 100 ml.Morphine group:morphine(6 mg) + 0.75 ％ hydrochloride ropivacaine (20 ml) + saline dilution,diluted to 100 ml,for postoperative epidural analgesia.Both two groups were adopted in LCP mode with a loading dose:dezocine group,dezocine(2 mg) +saline dilution,diluted to 5 ml; morphine group,morphine (2 mg) + saline dilution,diluted to 5 ml.Continuous infusion of 2 ml/h,a bolus dose of 2 ml,and a lockout interval of 15 min.The analgesia duration was 48 h.Visual analogue scales (VAS) evaluation was employed to assess the analgesic effect,and the postoperative epidural analgesia adverse reaction were also recorded.Results The analgesic effect was both satisfied in the two groups.Comparing the VAS scores postoperative at different time point (4 h,8 h,12 h,24 h,36 h,48 h),dezocine group(2.7 ± 0.4,2.5 ± 0.6,2.2 ± 0.5,1.5 ± 0.5,1.3 ± 0.5,1.1 ± 0.3) were slightly lower than morphine group (2.8 ± 0.5,2.6 ± 0.7,2.3 ± 0.6,1.6 ± 0.7,1.5 ± 0.6,1.2 ± 0.4),but the difference was not significant (within the group:F =2414.96,P ＜ 0.01 ; between the group:F =0.63,P ＞ 0.05 ; interactive:F =2.42,P ＞0.05).Comparison of VAS scores at different time points after operation in two groups,the difference was not statistically significant; And within the group,there was not,the difference was not significant at the time point at 12,24,36,48 h compare to postoperative at 4 h (P ＜ 0.01).the Adverse reaction like nausea and vomiting,skin itching occur rate is lower in dezocine group (3.3 ％ (1/30),0 (0/30)) than that of in morphine group(26.7％ (8/30),20.0％ (6/30)),and there were signficant differences between the two groups (P =0.026,0.024,P ＜ 0.05).Conclusion Dezocine composed with ropivacaine is safe and effective,and with few adverse reactions in total abdominal hysterectomy postoperative epidural analgesia,it is worth of widely use in clinical.