0引言全麻诱导期喉镜窥视和气管插管刺激可引起不同程度的血压增高，心率增快等心血管副反应．近年来曾探讨过多种方法，预防效果多不理想．我们用乌拉地尔（URA）于全麻诱导以观察气管插管时对心血管副反应的预防效果．l方法健康杂种犬12条，雌雄兼用，体重10，5kg～16kg，随 0 Introduction General anesthesia induction laryngoscopy and tracheal intubation can cause varying degrees of increased blood pressure, heart rate and other cardiovascular adverse reactions. In recent years, many methods have been explored, and the preventive effect is far from satisfactory. We used Urapidil (URA) to induce general anesthesia to observe the prophylactic effect of cardiovascular end-to-end tracheal intubation. l Method 12 hybrid dogs, both male and female, body weight 10,5 kg ~ 16kg, with