Development of a respiratory motion suppressed three dimensional catheter/guide-wire navigation system for endovascular interventions of upper abdominal artery

呼吸运动抑制三维导管/导丝导航系统是在自行研制的脑动脉三维导管导航系统的基础上研制的。要将该引导系统应用于腹主动脉，必须采用呼吸运动抑制技术。我们分析了腹主动脉的呼吸运动，并根据分析结果开发了一种呼吸运动抑制技术。此外，我们还评估了该技术的可靠性。我们发现腹主动脉的运动与横隔膜的运动有很好的相关性，呼吸运动抑制技术在3例中有2例的可靠性在90%以上。因此，这种呼吸运动抑制技术对于呼吸运动抑制的三维导管/导丝导航系统是有效的。

The respiratory motion suppressed three dimensional catheter/guide-wire navigation system has been developed based on three dimensional catheter guiding system for cerebral artery which we had developed before. To apply the guiding system to abdominal artery a respiratory motion suppression technique was necessary. We analyzed respiratory motions of abdominal arteries, and a respiratory motion suppression technique was developed based on the results of the analysis. Additionally, we evaluated reliability of the technique. We found that motions of abdominal artery were correlative well with diaphragm motions and the reliability of the respiratory motion suppression technique was over 90 % in two of the three cases. Thus, this respiratory motion suppress technique is effective for the respiratory motion suppressed three dimensional catheter/guide-wire navigation system.