Patent ID: 7641645
Filing Date: 2010-01-05
Classification: A61M

Abstract:
1. A method for an improved thrombolytic lysing technique comprising: puncturing a hemodialysis graft with a micropuncture needle; inserting a micropuncture guide wire through the micropuncture needle into the hemodialysis graft; removing said needle from the hemodialysis graft; selectively coupling an internal dilator and a catheter to form a combination dilator and catheter apparatus, wherein the internal dilator and the catheter define an annular space therebetween, and wherein the catheter defines a plurality of apertures in fluid communication with the annular space; inserting the combination dilator and catheter apparatus over said guide wire into the hemodialysis graft to a selected position wherein at least one of the plurality of apertures is positioned within a clot; infusing a lysing agent into the hemodialysis graft through said combined dilator and catheter apparatus via the annular space and the at least one of the plurality of apertures positioned within the clot to distribute the lysing agent to the clot; selectively decoupling the internal dilator from the catheter; removing said internal dilator; inserting a second larger guide wire into said catheter component of said combined dilator and catheter component; and removing said catheter component from the hemodialysis graft while maintaining access via said second larger guide wire for subsequent medical procedures.