In vitro color flow, pulsed and continuous wave Doppler ultrasound masking of flow by prosthetic valves.
In vitro color flow, pulsed and continuous wave Doppler ultrasound masking of flow by prosthetic valves.
复制标题
人工瓣膜血流的体外彩色血流、脉冲和连续波多普勒超声掩蔽。
DOI：
10.1016/s0735-1097(87)80470-9
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发表时间：
1987
影响因子：
24
通讯作者：
Kisslo,J
中科院分区：
文献类型：
--
作者：
Sprecher,DL;Adamick,R;Adams,D;Kisslo,J
基于多普勒超声不能穿透人工瓣膜的假设，在大型水槽中构建了体外流动模拟系统。传统的脉冲、连续波和多普勒彩色血流系统用于检测对角放置在水中并由连续泵维持的管道中的流量。在管道内的流量检测的控制周期后，六个不同的人工瓣膜被插入到一个阶段之间的传感器和tubing.In与控制测量相比，检测管道内的流量是不可能的，当多普勒波束通过任何方式穿过Starr-Edwards Silastic假体的中央闭塞球。观察到Starr-Edwards stellite瓣膜的多普勒信号检测明显减少，通过Björk-Shiley、Hall-Kastor和St. Jude瓣膜的中央闭塞盘检测血流信号的能力仅略有改善。与其他瓣膜不同的是，多普勒超声检测Carpentier-Edwards异种移植物瓣尖后血流的能力与对照期间相似。对血流掩蔽的理解应提高多普勒方法在研究人工瓣膜功能障碍中的临床应用。
On the hypothesis that Doppler ultrasound fails to penetrate prosthetic valves, an in vitro flow simulation system was constructed in a large water tank. Conventional pulsed, continuous wave and Doppler color flow systems were used to detect flow in tubing placed diagonally within the water and maintained by a continuous pump. After control periods of flow detection within the tubing, six different prosthetic valves were interposed on a stage between the transducer and the tubing.In comparison with control measurements, detection of flow within the tubing was impossible when the Doppler beam traversed the central occluding ball of the Starr-Edwards Silastic prosthesis by any modality. Marked reduction in the detection of the Doppler signal was noted for the Starr-Edwards stellite prosthesis with only slight improvement in the ability to detect the flow signals through the central occluding discs of the Björk-Shiley, Hall-Kastor and St. Jude valves. In distinction to the other valves, the ability of Doppler ultrasound to detect flow behind the cusps of the Carpentier-Edwards heterograft was similar to that during the control period. An understanding of flow masking should improve the clinical utility of Doppler methods for investigating prosthetic valve dysfunction.