ty -jour t1- ligustrazine对孤立的灌注大鼠肺JF压力/流动关系的影响 - 欧洲呼吸杂志d au -emery,c au -barer,g y1-1991/11/01 ur -http://www.qdcxjkg.com/content/4/4/10/1223.abstract n2 -Ligustrazine,Ligustrazine,合成的中国草药原理先前显示为肺血管扩张剂的疗法在慢性低氧和正常大鼠中进行了测试。压力/流动(p/q),在正态氧,缺氧期间和在低氧血管收缩后通过增加剂量的龙果剂量,在孤立的灌注肺中测量了关系。P/Q线在较大的范围内是线性的,并且向压力轴外推给了截距,这是流动的有效下游压力。在慢性低氧大鼠中,该线的斜率比对照大鼠陡峭,截距更大,我们归因于新肌肉发达的动脉。缺氧导致两组的斜率和截距增加,但截距的增加在慢性低氧大鼠中较大。在两组大鼠中,增加了在持续缺氧期间给出的Ligustrazine剂量的剂量,导致了线的粉丝,该线路逐渐向对照固定线迈进。在慢性低氧大鼠中,仅需要2 mg的Ligustrazine将线恢复到常氧位置,而在控制中,它需要4 mg。在慢性低氧大鼠中,每种剂量的截距变化都大于对照大鼠。 this suggests that ligustrazine mainly relaxes the muscle of small collapsible vessels. The action of ligustrazine remained in both control and chronically hypoxic rats after administration of an arginine analogue which blocks synthesis of the endothelial relaxant factor nitric oxide. This and previous evidence suggest that ligustrazine is a non-endothelial-dependent pulmonary vasodilator. ER -