Leung W H, Demopulos P A, Alderman E L, Sanders W, Stadius M L
Cardiology Division, Stanford University Medical Center, California 94305.
Cathet Cardiovasc Diagn. 1990 Nov;21(3):148-53. doi: 10.1002/ccd.1810210305.
Measurement of coronary dimension requires an accurate and reproducible dimensional reference. Angiographic catheters are frequently used for this purpose. We measured the angiographic diameters of a broad range of diagnostic and angioplasty guiding catheters by using two commonly used edge-detection algorithms. Angiographic diameters are significantly less than true catheter outer diameter. Therefore the use of contrast-filled catheters as a dimensional reference may lead to considerable error in vessel measurement with overestimation of absolute dimension. Tables of reference values for multiple catheter as calibration standard, tested under a variety of angiographic conditions. The metallic-tipped marker was found to have a better degree of reproducibility than catheters. These findings have implications for studies employing serial measurements of coronary artery dimension and for the clinical practice of estimating vessel diameter for choice of balloon size during angioplasty.
冠状动脉尺寸的测量需要一个准确且可重复的尺寸参考。血管造影导管常被用于此目的。我们使用两种常用的边缘检测算法测量了广泛的诊断和血管成形术引导导管的血管造影直径。血管造影直径明显小于导管的实际外径。因此，使用充满造影剂的导管作为尺寸参考可能会在血管测量中导致相当大的误差，绝对尺寸会被高估。列出了多种导管在各种血管造影条件下作为校准标准的参考值表。发现金属头标记物比导管具有更好的可重复性。这些发现对采用冠状动脉尺寸系列测量的研究以及血管成形术期间选择球囊尺寸时估计血管直径的临床实践具有重要意义。
