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Rotational atherectomy segmented abrading head and method to improve abrading efficiency
专利权人:
Christopher M. Narveson
发明人:
Christopher M. Narveson
申请号:
US12388703
公开号:
US08628550B2
申请日:
2009.02.19
申请国别(地区):
US
年份:
2014
代理人:
摘要:
The invention provides a rotational atherectomy system, device and method having, in various embodiments, a flexible, elongated, rotatable drive shaft comprising an eccentric abrading head comprising at least one eccentric abrading cylindrical segments attached to the drive shaft and in spaced proximity with proximal and a distal conical segments. Each individual abrading segment, comprises a first tissue removing surface, typically an abrasive coating on the outer surface, that is designed to abrade calcified, hard tissue and abrasive coating on the leading and trailing surfaces designed to abrade non-calcified, soft tissue. Each abrading segment, as well as the abrading head comprising the collective segments, has a center of mass spaced radially from the rotational axis of the drive shaft, facilitating the ability of the device to open the stenotic lesion to a diameter larger than the outer diameter of the enlarged abrading head when operated at high speeds.
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