Angiodynamics, Inc.

Ted Beyer

William M Appling

Donald Geer

Melvin Rosenblatt

Disclosed are various embodiments of a hemo-dialysis catheter in which the aspirating port at the end of the aspirating tube is distal of the infusion port or ports at the end of the infusion lumen. The infusion port or ports are arranged circumferentially so that the infused filtered blood is a substantially 360&#xb0; jet of fluid with a substantial radial component. This jet of fluid serves to abrade the occlusive material that is composed of fibrin and other components that grows down along the outer wall of the catheter that would otherwise tend to block off the ports. Stopping occlusion growth at the zone of the infusion ports prevents further growth distally to the aspirating port and protects the aspirating port from being blocked by the growth of occlusion.

Blood treatment catheter and method

The filter is composed of two portions. A first portion is a set of zi-zag struts arranged in a cylindrical fashion which fit against the wall of the vascular lumen and provide a base for positioning a filter portion. A filter portion is a set of struts. Each filtering strut has its upstream end connected to the positioning portion at the vascular wall and its downstream end held at a central position in the vascular lumen by a frangible connector or cord. The central connector has a center opening to permit blood flow through the central opening. When the cord is cut, the resilient filter struts flex radially outward against the vascular wall in a parked condition to provide a non-filtered state without requiring removal of the filter from the patient.

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Queensbury, NY, United States of America

Ted Beyer