William T. Fisher;John E. Nash;Charles W. Dodson, Jr.
发明人:
John E. Nash,William T. Fisher,Charles W. Dodson, Jr.
申请号：
US12468753
公开号：
US08226673B2
申请日:
2009.05.19
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A system and method for opening a lumen in an occluded blood vessel, e.g., a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e.g., a rotary impacting impeller, and a debris extraction sub -system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e.g., impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub -system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the being's body.
