Accurate guidance of a catheter by ultrasound imaging and identification of a catheter tip by pulsed-wave Doppler.
Accurate guidance of a catheter by ultrasound imaging and identification of a catheter tip by pulsed-wave Doppler.
复制标题
通过超声成像精确引导导管并通过脉冲多普勒识别导管尖端。
DOI：
10.1111/j.1540-8159.2011.03262.x
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Belohlavek,Marek
中科院分区：
文献类型：
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作者：
McMahon,EileenM;Jiamsripong,Panupong;Katayama,Minako;Chaliki,HariP;Fatemi,Mostafa;Belohlavek,Marek
背景：随着众多微创医疗手术的出现，准确的导管引导已变得势在必行。我们介绍并测试了一种通过超声成像和脉冲波 (PW) 多普勒进行导管引导的方法。方法：可操纵导管的尖端装有一个小型压电晶体，可主动传输由函数发生器驱动的信号。我们称之为主动尖端 (AT) 导管。在水箱中，我们浸入了一个“目标”晶体和一个由四个“参考”晶体组成的矩形矩阵。使用二维 (2D) 超声成像对导管轴进行初始引导和可视化，然后使用 PW 多普勒模式识别 AT 导管尖端并将其引导至在 2D 超声图像中也可见的模拟目标。从 AT 导管的随机初始位置进行 10 次引导试验，每次从距目标约 8 厘米处开始。结果：在 10 次导航试验后，导管尖端距目标的平均最终距离为 2.4 ± 1.2 毫米，试验距离范围从最小 1.0 毫米到最大 4.5 毫米。结论：尽管处于开发过程的早期，但这些定量的体外结果显示了超声成像和尖端识别的导管引导的前景。 PW 多普勒。 （佩斯 2012 年；35:44–50）
Background:With the advent of numerous minimally invasive medical procedures, accurate catheter guidance has become imperative. We introduce and test an approach for catheter guidance by ultrasound imaging and pulsed‐wave (PW) Doppler.Methods:A steerable catheter is fitted with a small piezoelectric crystal at its tip that actively transmits signals driven by a function generator. We call this an active‐tip (AT) catheter. In a water tank, we immersed a “target” crystal and a rectangular matrix of four “reference” crystals. Two‐dimensional (2D) ultrasound imaging was used for initial guidance and visualization of the catheter shaft, and then PW Doppler mode was used to identify the AT catheter tip and guide it to the simulated target that was also visible in the 2D ultrasound image. Ten guiding trials were performed from random initial positions of the AT catheter, each starting at approximately 8 cm from the target.Results:After the ten navigational trials, the average final distance of the catheter tip from the target was 2.4 ± 1.2 mm, and the range of distances from the trials was from a minimum of 1.0 mm to a maximum of 4.5 mm.Conclusions:Although early in the development process, these quantitative in vitro results show promise for catheter guidance with ultrasound imaging and tip identification by PW Doppler. (PACE 2012; 35:44–50)