本文取17例冠状动脉搭桥术中切下的胸廓内动脉(IMA),检测其功能和形态,比较硬齿(金属)血管阻断钳和软齿(泡沫硅酮)血管阻断钳对IMA松弛力的损伤。将每一例IMA切成三个血管环,每环宽4毫米,分别用作对照、硬钳钳夹和软钳钳夹三种试验。均先用Krebs氏生理溶液(PSS)浸30分钟,后两组在PSS中分别用 In this study, 17 cases of intrathoracic artery (IMA) removed during coronary artery bypass grafting were examined for their function and morphology. To compare the effect of hard-to-metal (metal) vascular occlusion forceps and soft- Damage of force. Each case of IMA cut into three vascular rings, each ring width of 4 mm, respectively, as a control, hard-clamp and soft-jaw clamp three kinds of tests. All were first immersed in Krebs’ physiological solution (PSS) for 30 minutes, and the latter two groups were used separately in PSS