MEASUREMENT OF INSTANTANEOUS BLOOD FLOW VELOCITY AND PRESSURE IN CONSCIOUS MAN WITH A CATHETER-TIP VELOCITY PROBE
MEASUREMENT OF INSTANTANEOUS BLOOD FLOW VELOCITY AND PRESSURE IN CONSCIOUS MAN WITH A CATHETER-TIP VELOCITY PROBE
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DOI：
10.1161/01.cir.40.5.603
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发表时间：
1969-01-01
期刊：
影响因子：
37.8
通讯作者：
BRAUNWAL.E
中科院分区：
文献类型：
--
作者：
GABE, IT;GAULT, JH;BRAUNWAL.E
在使用电磁导管尖端速度探头进行诊断性右心导管插入术和左心导管插入术期间对 23 名患者进行了研究。导管包含用于同时测量血管内压力的压力管腔。升主动脉的平均峰值和平均血流速度分别为 66 和 11 厘米/秒，肺动脉为 57 和 10 厘米/秒，上腔静脉为 28 和 12 厘米/秒，下腔静脉为 26 和 13 厘米/秒。升主动脉的速度模式与其他方法获得的速度模式相似。将导管放置在升主动脉中需要小心；在一名主动脉瓣狭窄患者中，记录的血流速度模式并不令人满意。在肺动脉中，导管的轻弹常常会在记录中产生伪影。研究了深呼吸对升主动脉和肺动脉血流速度的影响。在升主动脉中，在呼气末期达到最高的速度和每搏输出量，而在肺动脉中，血流速度和每搏输出量在吸气时达到最大。在九名患者中，将根据升主动脉或肺动脉的平均速度和放射学测量的横截面积的乘积计算出的心输出量与通过指示剂稀释法确定的心输出量进行比较；相关系数为0.73。没有出现任何并发症，并且探头被证明是可靠的。
Twenty-three patients were investigated during diagnostic right and left cardiac catheterization with an electromagnetic catheter-tip velocity probe. The catheter contained a pressure lumen for simultaneous measurements of intravascular pressure. Average peak and mean blood velocities were 66 and 11 cm/sec in the ascending aorta, 57 and 10 cm/sec in the pulmonary artery, 28 and 12 cm/sec in the superior vena cava, and 26 and 13 cm/sec in the inferior vena cava. The velocity pattern in the ascending aorta was similar to that obtained by other methods. Positioning of the catheter in the ascending aorta required care; in one patient with aortic stenosis the recorded blood velocity pattern was unsatisfactory. In the pulmonary artery flicking of the catheter often produced artifacts in the records. The effect of deep respiration on blood velocity in the ascending aorta and pulmonary artery was studied. In the ascending aorta the highest velocities and stroke volumes were achieved during late expiration while in the pulmonary artery blood velocity and stroke volume were greatest in inspiration. In nine patients the cardiac outputs calculated from the product of mean velocity and radiologically measured cross-sectional area of the ascending aorta or pulmonary artery were compared with cardiac outputs determined by the indicator-dilution method; the correlation coefficient was 0.73. There were no complications, and the probe proved reliable.