Methods Twelve healthy rabbits were randomly divided into groups A and B (n=6 in each group). In group A, intravenous injection of NVB (1 ml/min, quick injection group; 0.25 ml/min, slow injection group) was performed on ear veins at both sides.

• 方法将12只健康家兔随机分成A、B两组各6只；A组双侧耳缘静脉分别按1ml/min(快速组)、0.；25ml/min(慢速组)静脉注射化疗药物(盖诺);