Catheter with filter and thrombus-discharge device

• US 5,795,322 A
• Filed: 04/09/1996
• Issued: 08/18/1998
• Est. Priority Date: 04/10/1995
• Status: Expired due to Term

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Boudewijn, Alexander C.
• Primary Examiner(s): MCDERMOTT, CORRINE MARIE
• Application Number:
  US08/629,798
• Time in Patent Office: 861 Days
• Field of Search: 604/22, 604/27, 604/104-107, 606/198, 606/200
• US Class Current: 604/22
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/32037 for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid

Abstract

This invention relates to a catheter comprising a tube-like basic body with a distal and a proximal end, wherein the catheter comprises an expandable filter element at the distal end and a device for reducing thrombi in size and removing them. The filter element can be formed by a number of strip-shaped wall sections of the basic body defined in between longitudinal cuts evenly distributed around the circumference and may furthermore comprise a means for moving the sections of the basic body positioned on either side of the wall sections towards each other in order to make the wall sections bend outwards.

Claims

1. Catheter comprising:

a tube-like catheter body with a distal and a proximal end connected by a longitudinal section, wherein the catheter comprises at the distal end an expandable filter element; and

further contained at the distal end, a device for reducing thrombi in size and removing them; and

wherein the filter element is formed by a number of strip-shaped wall sections of of the tube-like catheter body defined in between longitudinal cuts evenly distributed around the circumference; and

furthermore comprising a means for moving sections of the tube-like catheter body, said means for moving situated on the distal end and causing certain of the wall sections to move towards each other in order to make other parts of the wall sections bend outwards; and

wherein the device for reducing thrombi comprises a jet nozzle connected to a pressure lumen and a discharge opening connected to a discharge lumen, said device situated inside the tube-like catheter body such that said jet nozzle is pointing in the proximal direction and said discharge opening is proximal of said jet nozzle.

2. Catheter as claimed in claim 1 comprising an outer tube-like body and an inner tube-like body received inside it in a movable manner, which are connected to each other at their digital ends and wherein the strip-shaped wall sections have been formed in the outer tube-like body.

3. Catheter as claimed in claim 1 wherein the jet nozzle has been positioned and dimensioned in relation to the discharge opening in such a way that they form an ejector.

4. Catheter comprising:

a tube-like catheter body with a distal and a proximal end connected by a longitudinal section, wherein the catheter comprises at the distal end an expandable filter element; and

further contained at the distal end, a device for reducing thrombi in size and removing them; and

wherein the filter element is formed by a number of strip-shaped wall sections of the tube-like catheter body defined in between longitudinal cuts evenly distributed around the circumference; and

furthermore comprising a means for moving sections of the tube-like catheter body, said means for moving situated on the distal end and causing certain of the wall sections to move towards each other in order to make other parts of the wall sections bend outwards; and

wherein the device for reducing thrombi comprises a jet nozzle connected to a pressure lumen and a discharge opening connected to a discharge lumen, said device situated inside the tube-like catheter body such that said jet nozzle is pointing in the proximal direction and said discharge opening is proximal of said jet nozzle; and

wherein the pressure lumen and the discharge lumen are received inside the tube-like catheter body.

5. Catheter as claimed in claim 4, wherein the jet nozzle and the discharge opening are positioned inside the longitudinal section of the catheter body, wherein the longitudinal cuts extend.