Tooker J, Huseby J, Butler J
Am Rev Respir Dis. 1978 Apr;117(4):721-5. doi: 10.1164/arrd.1978.117.4.721.
We have studied the effect of the ventrical height of the pulmonary wedge catheter in the lung on the pulmonary wedge pressure-left atrial relationship during positive end-expiratory pressure ventilation in oleic acid-induced pulmonary edema. Pulmonary wedge catheters were placed above and below the left atrium in normal dogs and in dogs with oleic acid-induced edema. Wedge pressure and left atrial pressure were measured simultaneously during positive end-expiratory pressure ventilation (range, 0 to 30 cm H2O positive end-expiratory pressure). Pulmonary wedge catheters below the left atrium correctly recorded left atrial pressure and change in left atrial pressure at all positive end-expiratory pressures studied. Pulmonary wedge catheters above the atrium consistently recorded pressures higher than the normal left atrial pressure. They did not correctly respond to increases in left atrial pressure until it was increased to a value higher than the initial upper pulmonary wedge pressure. Pulmonary arterial catheters, when properly placed, should be reliable indicators of left atrial pressure during positive-pressure ventilation in normal and edematous lungs.
我们研究了在油酸诱导的肺水肿的呼气末正压通气过程中，肺内肺楔压导管的心室高度对肺楔压与左心房压力关系的影响。在正常犬和油酸诱导水肿的犬中，将肺楔压导管置于左心房上方和下方。在呼气末正压通气（范围为0至30 cm H₂O呼气末正压）期间，同时测量楔压和左心房压力。在所有研究的呼气末正压下，位于左心房下方的肺楔压导管正确记录了左心房压力和左心房压力的变化。位于心房上方的肺楔压导管始终记录到高于正常左心房压力的压力。在左心房压力增加到高于初始肺楔压上限的值之前，它们对左心房压力的增加没有正确反应。在正常和水肿肺的正压通气期间，肺动脉导管放置适当时，应是左心房压力的可靠指标。
