US 8,758,325 B2Granted

Rapid exchange catheter

AssigneeMedtronic, Inc.

InventorsMark W. I. Webster, Jason A. Galdonik, Matthew F. Ogle, Edward Anderson, Gregory A. Boldenow

Life of this patent

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Abstract

Thrombectomy catheters are presented that have curved tip portions. A suction lumen extends from at or near the proximal end of the catheter to a suction port at or near the tip portion of the catheter. The curves of the thrombectomy catheter can be selected to place a suction port at or near a vessel wall for the more effective removal of thrombus resulting from directing the suction in the direction of the thrombus. In some embodiments, the tip portion of the catheter can be transitioned from a first configuration for delivery of the catheter into the vessel to a second more curved configuration with a desired design for application of suction. The catheter can be moved in a circumferential and/or lateral direction to cover selected portions of the inner vessel wall. In some embodiments, a partially occlusive structure can be used to reduce and/or redirect flow within the vessel to improve performance of the thrombectomy.

Claims18

Dependent claims

A method for the performance of a procedure in a patient's vessel using a catheter having a distal tip portion, a distal end opening, and a suction lumen, wherein the distal end opening is a suction port for providing access to the suction lumen, and wherein the catheter is a rapid exchange catheter comprising a guide port, having a rapid exchange segment between the guide port and the distal end opening, the method comprising:

delivering the catheter on a guide structure into the vessel to a target lesion site wherein the guide structure extends through the guide port and out through the distal end opening to transition the distal tip portion from a natural curved configuration into a relatively straighter configuration;
after the distal tip portion has reached the target lesion site, withdrawing the guide structure sufficiently such that the distal tip portion assumes its natural curved configuration from the relatively straighter configuration, wherein in the natural curved configuration the distal tip portion includes an unconstrained displacement diameter at least 90% of a vessel diameter of the patient's vessel, wherein the unconstrained displacement diameter is defined as a perpendicular radial distance from a surface of the distal tip portion to the suction port;
and
applying suction with the distal tip portion at the target lesion site to remove debris from the vessel into the suction lumen through the suction port.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/409,147Filed 21 Apr 2006 · continuation
Priority: 18 Aug 2005
Published: US 2007/0060908 A115 Mar 2007
Granted: 24 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

A61M 25/0041
Characterised by the form of the tubing: pre-formed, e.g. specially adapted to fit with the anatomy of body channels
A61B 17/22
Surgical instruments, devices or methods: implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out…
A61M 25/0068
Characterised by the distal end, e.g. tips: static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
A61M 25/008
Characterised by the distal end, e.g. tips: strength or flexibility characteristics of the catheter tip

Family

Application11/206,680Parent of this continuation · filed 18 Aug 2005
US 2007/0060911 A1Pre-grant publication · published 15 Mar 2007
US 2007/0060908 A1Published application
US 7,938,820 B2Related patent
US 8,758,325 B2This patent

From the US filing history. Foreign family members aren’t listed.