PERFUSION-ISOLATION CATHETER APPARATUS AND METHOD

摘要

A catheter (10) includes an introducer, a flow isolator adapted for disposition in a primary conduit to facilitate flow in the primary conduit (200) while inhibiting flow, and intersecting secondary conduits (240, 250, 260, 270). The flow isolator may include a tubular mesh (30), and surroundin g balloon structure (16). Alternatively, a sleeve can be provided with a prima ry opening, and a secondary opening which are sized to inflate the sleeve with the body fluid. Structures for deploying the sleeve between a lowprofile state, and highprofile state may include expandable fingers, or pneumatic chambers inflatable from an external source. In operation the sleeve can be forced by the body fluid against the intersection with the secondary conduit s to achieve isolation. Alternatively, the pneumatic chambers can be inflated to form seals with the primary conduit. A blood filter or snare is contemplated to filter any blood clots which may develop around the flow isolator.