Results Phlebitis and plugging the incidence of the observation group was lower than control group, but infusion speed was more rapid than the control group.
结果观察组留置针的静脉炎和堵管发生率远远小于对照组，而输液速度快于对照组。
The medical liquid is output under the action of the gas pressure. The infusion speed and infusion quantity can be adjusted according to the patients condition.
药液在气压作用下输出，其输液速度和输液量能根据病情需要调节。
Conclusion: Etomidate and propofol are suitable for induction in the intubation in tracheotomy with controlled dosage and infusion speed.
结论：依托米酯，异丙酚均可作为喉颈联合手术经气管切开插管麻醉诱导剂，但应掌握静注剂量与速度。
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