Verma R, Keane J F
Department of Cardiology, Children's Hospital, Boston, Massachusetts 02115.
Cathet Cardiovasc Diagn. 1994 Sep;33(1):85-8. doi: 10.1002/ccd.1810330119.
Advances in interventional cardiac catheterization have necessitated technique modifications to ensure patient safety while allowing data acquisition. The use of cutoff pigtail catheters over guidewires for pressure recordings and angiography exemplifies such a modification. The primary purpose of this study was to ascertain contrast volume and flow rates achievable using such a system. A total of 140 used catheters of various sizes, with intraluminal guidewires (0.035 inch in 6, 7, and 8F; 0.025 inch in 5F) were subjected to contrast injections at increasing rates and volumes until rupture occurred. The 7F catheters allowed volume delivery at 15-40 ml at 15 ml/sec, 8F catheters 40 ml at 30 ml/sec, and 5 and 6F catheters 10 ml at 10 ml/sec. All ruptured within 3 cm of the hub, at < or = 900 PSI. A review of 737 clinical procedures revealed adequate pressure recordings and angiographic details in all, uncomplicated save for one intracardiac wire dislodgement.
介入心脏导管插入术的进展使得有必要对技术进行改进，以确保患者安全，同时允许进行数据采集。使用带侧孔的猪尾导管通过导丝进行压力记录和血管造影就是这样一种改进的例子。本研究的主要目的是确定使用这种系统可实现的造影剂体积和流速。总共140根不同尺寸的用过的导管，带有腔内导丝（6F、7F和8F的为0.035英寸；5F的为0.025英寸），以递增的速率和体积进行造影剂注射，直到破裂发生。7F导管在15毫升/秒的速度下可输送15 - 40毫升的造影剂，8F导管在30毫升/秒的速度下可输送40毫升，5F和6F导管在10毫升/秒的速度下可输送10毫升。所有导管均在距接头3厘米内、压力小于或等于900磅力/平方英寸时破裂。对737例临床手术的回顾显示，所有手术均获得了足够的压力记录和血管造影细节，除了1例心内导丝移位外，均无并发症。
