心输出量可以通过多种方法来测量,如热稀释法(thermodilution),超声多普勒法等。 PVR的单位为Wood单位(Wood units),通常用于评估PAH的严重程度。正常情况下,PVR的值应该在1-2 Wood units之间。当PVR的值超过3 Wood units时,就表明患者可能存在肺动脉高压的问题。
T-122C is a 2-way, full range loudspeaker system. Its features include a high efficient 12"woofer and one 1.75"neodymium compression driver housed in a compact plywood enclosure, combining smooth dynamic full frequency performance with high...