Enhanced cross stream mechanical thrombectomy catheter with backloading manifold

Abstract

An enhanced cross stream mechanical thrombectomy catheter with backloading manifold having a distal end with outflow and inflow orifices at one side for producing concentrated cross stream jet flow for selective and concentrated thrombus ablation during thrombectomy procedures. The invention provides for suitable distancing of high powered ablation or suction forces from the near walls of the vasculature. Cross stream flow emanating from the one side of the distal end of the catheter resultantly urges the distal end of the catheter and thus the opposing non-orificed side of the distal end of the catheter toward and against the vascular wall to inhibit contact of the inflow orifice with the vascular wall. Features of the invention include a geometrically configured insert to facilitate the backloading or exchange of guidewires.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001] This patent application is related to patent application Ser. No. 10 / 455,096 filed Jun. 05, 2003, entitled “Thrombectomy Catheter Device Having a Self-Sealing Hemostatic Valve,” which is pending. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention is for a thrombectomy catheter, and more particularly, relates to an enhanced cross stream mechanical thrombectomy catheter which accommodates interchanging of guidewires through rear loading of a guidewire, as well as loading of a guidewire in a conventional manner, and also provides for improved cross stream ablation at a thrombus site. The intended use of this invention is for the detachment and removal of unwanted tissues, such as thrombus, from within biological conduits. [0004] 2. Description of the Prior Art and Comparison to the Present Invention [0005] In current cross stream catheters, vessel damage by the multiple inflow / outflow cross stream cat...

AI Technical Summary

Benefits of technology

[0006] There is yet another benefit to the asymmetrical design of the present invention at the catheter distal end where all of the jet stream outflow is directed from one side of the catheter distal end resulting in a powerful concentration of directed force and increased flow caused by removal or proximal retardation of the guidewire. Such benefit results in the distal portion of the catheter reactingly being directed and forced against the vessel wall opposite to the cross stream action. This movement

Problems solved by technology

In current cross stream catheters, vessel damage by the multiple inflow/outflow cross stream catheters involves the vessel wall being sucked into the catheter at the side inlet orifice of the catheter.

However, in the multiple orifice pair arrangements of the prior art, internal turbulent eddies consumed the area and an increase in performance often did not accompany the retraction of the guidewire.

Furthermore, in existing designs, a guidewire cannot be reliably retracted from the catheter without the potential of the guidewire exiting the inflow ori

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