CULLY, EDWARD H.,HARTMAN, CODY L.,NORDHAUSEN, CRAIG T.,TITTELBAUGH, ERIC M.,VONESH, MICHAEL J.
申请号：
CA2636419
公开号：
CA2636419C
申请日:
2007.01.12
申请国别(地区):
CA
年份:
2013
代理人:
摘要：
The present invention relates to a non-evertable blood filter that divides thetransverse cross sectional area of a venous vessel into three annular regionsor zones. The inner zone, the region immediately surrounding the longitudinalaxis of the vessel, is maintained in a relatively open state with only minimalinterference from the members making up the filter device so that blood flowcan be maintained at a relatively normal rate. Concentrically surrounding theinner zone is the intermediate zone, to which captured emboli are directed outof the bloodstream passing primarily through the inner zone. Finally,concentrically surrounding the intermediate zone is the outer zone adjacent tothe vessel wall. This is also intended to be kept free of emboli, so thatemboli in the bloodstream immediately adjacent the vessel wall are directedaway from the wall by the filter design and into the intermediate zone,thereby avoiding the accumulation of emboli adjacent the vessel wall thatmight otherwise result in stenosis. The blood filter is intended primarily foruse as an inferior vena cava filter, although it can be made in a range ofsizes allowing its use in blood vessels and particularly venous vessels ofdiffering diameters. The filter is preferably removable.
