两种麻醉方法对大鼠蛛网膜下腔阻滞模型建立的影响.

Objective To compare the effects of isoflurane and pentobarbital on the establishment of subarachnoid block model in rats. Methods 60 SD rats aged 4 months were randomly divided into Group A (n=30) and Group B (n=30). Rats in Group A received intraperitoneal injection of 10g/L pentobarbital sodium solution 30mg/kg and 1/4 of the initial dosage was added according to the operation effect. The induction and maintenance of anesthesia were achieved by isoflurane inhalation in Group B during operation. We recorded the time of anesthesia induction, quality of anesthesia, time of anesthesia, time of operation, and recovery time. The heart rate, respiration frequency, temperature, and saturation of blood oxygen were recorded during operation. We compared death from anesthesia and success of modeling in the two groups. Results There was no significant difference between the groups with regard to age, weight, body temperature or saturation of blood oxygen (P>0.05). Compared to Group B, heart rate decreased 1-60 minutes after anesthesia and respiration frequency decreased 5 minutes after anesthesia in Group A (P<0.05). The time of anesthesia induction, time of anesthesia, time of operation, and recovery time were shorter in Group B (P<0.05). The quality of anesthesia was better in Group B (P<0.05). The success rate of modeling was higher but mortality rate of anesthesia was lower in Group B than in Group A (P<0.05). Conclusion Compared with intraperitoneal injection of pentobarbital sodium, isoflurane inhalation can provide a better anesthetic effect during the operation to establish a rat model of subarachnoid block. [ABSTRACT FROM AUTHOR]