Wayand W, Rendl K H, Pimpl W, Waldstein N
Wien Med Wochenschr. 1981 Feb 28;131(4):105-7.
The intrathoracic pressure rises when exhaling into a manometer to such an extent that finally the venous flow of blood to the right heart stops. It is supposed that this venous stop flow pressure (VSFP) is equal to the central venous pressure. In a clinical trial by two independent examiners in 97% of the cases a correlation within a range of 5 cm H2O was found (70 measurements). Thus the central venous pressure can be measured noninvasively with an ultrasound device.
向压力计呼气时，胸腔内压力会升高到最终导致血液向右心的静脉血流停止的程度。据推测，这种静脉血流停止压力（VSFP）等于中心静脉压。在一项由两名独立检查人员进行的临床试验中，在97%的病例中发现（70次测量）在5厘米水柱范围内存在相关性。因此，可以使用超声设备无创测量中心静脉压。
