Effect of shenfu injection on the stability of circulation during induction of general anesthesia for aged people

Objective To observe the intervention of Shenfu Injection (SFI) on the hemodynamics and circulatory function during induction of general anesthesia for aged people,in order to optimize the medication of anesthesia inductive phase in aged people. Methods Sixty aged patients scheduled to receive general anesthesia were equally randomized into 2 groups,the SFI group and the control group. SFI via intravenous drip (1 mL/kg diluted with 5 mL/kg saline) was administered to the SFI group 15 min before anesthesia induction and to the control group,normal saline was administered instead. Then the induction and intubation were implemented. The systolic blood pressure (SBP),diastolic pressure (DBP),heart rate (HR),central venous pressure (CVP),pulse saturation oxygen (SpO2),and the ST segment of ECG were observed at the different time points of induction,i.e. at the time of entry into the operating room (T1),ending the medication (T2),before the induction (T3),showing the lowest SBP in induction (T4),before and after intubation (T5 and T6). The dose and frequency of atropine and ephedrine applied in the inductive phase were observed as well. Results As compared with the baseline values measured at T1,CVP elevated at T2,T3,and T6 (P0.05),SBP and DBP descended at T4,T5,T6 in both groups;HR accelerated at T2 T3,and T6 in the control group;and HR at T4,T5 and T6 in both groups were significantly different (P0.05 or P0.01). Inter-group comparisons showed significant difference between groups in CVP at T2 (P0.05);so did SBP,DBP and HR at T4,T5 and T6 (P0.05 or P0.01). Conclusion Application of SFI in the inductive phase of general anesthesia in aged people could evidently reduce the fluctuation of hemodynamics to prevent the occurrence of myocardial ischemia and improve it definitely.