ASPIRATION CATHETERS FOR THROMBUS REMOVAL

• US 20110230859A1
• Filed: 05/27/2011
• Published: 09/22/2011
• Est. Priority Date: 07/14/2008
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Lumen Biomedical, Inc.
• Inventors: Anderson, Edward, Ganesan, Kavitha, Boldenow, Greg, Kirchgessner, John, Wlodarski, Grazyna, Galdonik, Jason A.
• Granted Patent: US 10,058,339 B2
• Time in Patent Office: Days
• US Class Current: 604/523
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• 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 17/2833 Locking means
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2017/2923 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61M 2025/0008 having visible markings on its surface, i.e. visible to the naked eye, for any purpose, e.g. insertion depth markers, rotational markers or identification of type
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers

Abstract

Systems for less invasive medical procedures comprise a filter device mounted on an integrated guiding structure and an aspiration catheter. These components can be used together or separately, and the system can be used with other medical devices that are designed for less invasive procedures, such as procedures in a patient'"'"'s vasculature. The filter device can involve improved torque coupling with a torque coupler associated with a resilient member that correspondingly also provides increased flexibility relative to an overtube that forms a tube for the remaining portions of the device. An actuation tool for the filter device used a systematic loading procedure for proper loading of the corewire and overtube into the actuation tool. A fiber cartridge comprises fibers loaded as a bundle into the cartridge for delivery with the ends of the fibers respectively bonded to radiopaque markers that can be visualized to come together when the filter is properly deployed. The aspiration catheter generally has a rapid exchange format. The catheter can have a radiopaque band that is held in place under metal wire embedded within the polymer forming the tube of the catheter. In some embodiments, the aspiration catheter has a small diameter distal portion that can access into small diameter vessels in which the distal portion has a smaller average diameter than the remaining tube of the catheter.

Claims

1. An aspiration catheter comprising a connector, a proximal portion, a distal tip and a tube connected between the distal tip and the proximal portion, wherein the connector is attached to the proximal portion to provide a passageway to the distal tip through a continuous lumen extending from the proximal portion to the distal tip, wherein the distal tip has an average outer diameter from about 25 percent to about 90 percent of the average outer diameter of the tube.

2. The aspiration catheter of claim 1 wherein the outer diameter of the distal tip is tapered to gradually narrow toward a distal aspiration opening.

3. The aspiration catheter of claim 1 wherein the length of the distal portion is at least 1.0 centimeters.

4. The aspiration catheter of claim 1 wherein the distal portion comprises a rapid exchange segment.

5. The aspiration catheter of claim 1 wherein the distal tip is curved.

6. The aspiration catheter of claim 1 wherein the distal tip has a maximum outer diameter of 0.040 inches.

7. The aspiration catheter of claim 1 wherein the distal tip has a maximum outer diameter of 0.025 inches and wherein the average outer diameter of the tube ranges from 0.05 inches to 0.10 inches.