Cha S D, Roman C F, Maranhao V
Department of Cardiology, Deborah Heart and Lung Center, Browns Mills, NJ 08015.
Cathet Cardiovasc Diagn. 1988;14(1):63-8. doi: 10.1002/ccd.1810140115.
We compared the intracardiac and intravascular pressures obtained by a conventional strain gauge transducer (CT) with a recently developed disposable high-fidelity transducer catheter (DT) during cardiac catheterization. CT was positioned at the patient's midchest level. The pressure measurements obtained by DT compared favorably with those of CT. Femoral arterial pressures by the two methods showed no statistical difference. Right heart pressures were similar using both transducers. However, right ventricular pressures by DT in five of eight patients were lower than that from CT. Higher pulmonary arterial pressures were noted in two of seven patients and higher pulmonary capillary wedge pressures were seen in four patients using DT compared to CT. None of these differences were of statistical significance. These pressure differences may be due to transducer position. Because the midchest position of CT does not precisely define the anatomic location of the cardiac chamber being studied, pressure measurements can be overestimated or underestimated. DT eliminates this problem, as well as overshooting and concern with air bubbles in the catheter system commonly associated with CT. Therefore DT may provide accurate hemodynamic measurements. It would appear to be useful regardless of patient position and may be useful in ambulatory hemodynamic determinations.
我们在心脏导管插入术期间，比较了使用传统应变片式传感器（CT）和最近研发的一次性高保真传感器导管（DT）所获得的心内和血管内压力。CT放置在患者胸部中部水平。DT所获得的压力测量结果与CT的测量结果相比良好。两种方法测得的股动脉压力无统计学差异。使用两种传感器时右心压力相似。然而，8例患者中有5例通过DT测得的右心室压力低于CT测得的结果。与CT相比，使用DT时，7例患者中有2例肺动脉压力更高，4例患者肺毛细血管楔压更高。这些差异均无统计学意义。这些压力差异可能归因于传感器位置。由于CT在胸部中部的位置不能精确界定所研究心腔的解剖位置，压力测量可能会被高估或低估。DT消除了这个问题，以及通常与CT相关的导管系统中的过冲和气泡问题。因此，DT可能提供准确的血流动力学测量。无论患者体位如何，它似乎都有用，并且可能在动态血流动力学测定中有用。
