Twice abdomial operations of 8 dogs were done at an interval of a month. The first celiotomies were performed with epidual block (experiment group, n1=8), and the second performed with pentothal sodium intravenous anesthesia (control group, n2=8).

• 8例犬间隔1个月分别施行2次腹部手术,第1次采用硬膜外阻滞(试验组,n=8),第2次采用硫喷妥钠静脉麻醉(对照组,n=8)。