|Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|Outline of Final Research Achievements
Vascular stents have become the most common procedure to gain the luminal area and to reduce the rate of restenosis in atherosclerotic arteries. However, in case of instent thrombosis and blood-flow restriction, resulting from inappropriately stent deployment or misplacement, these stents should be retrieved. Under these conditions, we have developed a novel device that could firmly grasp a stent for removal. Because the shaft of first prototype device was still 1.8 mm in diameter, the device could not be advanced into a small and tortuous artery. The aim of this study was to investigate the feasibility of this improved device with porcine coronary arteries. The forceps could catch and remove expanded stents in porcine coronary arteries without vessel damage confirmed by intravascular ultrasound. These results demonstrate that the present device can be feasible and safety for transluminal removal of foreign bodies even in small and tortuous coronary arteries in acute phase.