Fairfax W R, Thomas F, Orme J F
Chest. 1984 Aug;86(2):270-1. doi: 10.1378/chest.86.2.270.
Two patients with respiratory failure had consistently reproducible findings on insertion of flow directed pulmonary artery catheters which led to the subsequent diagnosis of pulmonary embolus. Occlusion of the catheter tip and development of a rising "overwedge" tracing on deflation of the balloon may mean the catheter tip has become embedded in clot. When combined with the inability to obtain a wedge tracing, the deflation "overwedge" tracing should alert the physician to the possibility of unsuspected pulmonary embolus.
两名呼吸衰竭患者在插入血流导向肺动脉导管时出现了一致且可重复的发现，随后诊断为肺栓塞。导管尖端堵塞以及球囊放气时出现上升的“过度楔压”波形可能意味着导管尖端已嵌入血栓。当与无法获得楔压波形相结合时，放气时的“过度楔压”波形应提醒医生注意存在未被怀疑的肺栓塞的可能性。
