superior vena cava上腔静脉 segmental venous capacity静脉段容量 selective venous catheterization选择性的静脉导管 acetarsone乙酰胂胺,乙酰胺胂 subclavian vein catheterization锁骨下的静脉导管插入 slow vital capacity缓慢肺活量 suprahepatic vena cava肝上腔静脉