Apparatus and methods for removing relatively large and small stones from a body passage
AssigneeWilson-Cook Medical Inc.
InventorsJohn A. Karpiel, Wenfeng Lu, Brian K. Rucker
Life of this patent
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Abstract
The present invention provides apparatus and methods suitable for removing at least one stone in a body passage. The apparatus comprises a balloon catheter having at least one working lumen adapted to receive an extraction basket. In use, the extraction basket may be used to capture and remove relatively large stones, and/or crush relatively large stones into smaller stone fragments. The balloon may then be inflated and maneuvered to engage the stone fragments and urge at least one of the stone fragments out of the body passage.
Claims20
Apparatus suitable for removing at least one stone in a body passage, the apparatus comprising:
- a catheter having proximal and distal regions, and a working lumen disposed between the proximal and distal regions;
- a balloon coupled to an exterior surface of the catheter, the balloon having deflated and inflated states;
- an inflation lumen disposed between the proximal and distal regions of the catheter, wherein the inflation lumen is in fluid communication with an interior of the balloon to inflate the balloon;
- an extraction basket coupled to a control member, the extraction basket comprising a plurality of resilient members having a contracted state suitable for advancement within the working lumen of the catheter and an expanded state configured to capture at least one stone;
- and
- a proximal assembly comprising a handle and an inflation port, wherein the handle is operably coupled to the control member of the extraction basket and wherein the inflation port is in fluid communication with the inflation lumen,
- wherein a distal end of the catheter is configured to engage the resilient members of the extraction basket to allow a crushing force to be applied to the stone as the resilient members are retracted in a proximal direction against the distal end of the catheter, and
- wherein the balloon is configured to urge at least one smaller stone fragment in a direction out of the body passage when in the inflated state.
A method suitable for removing at least one stone in a body passage, the method comprising:
- providing a catheter having proximal and distal regions, and a balloon coupled to an exterior surface of the catheter, wherein the balloon is provided in a deflated state;
- providing an extraction basket adapted to be advanced longitudinally within a working lumen of the catheter, wherein the extraction basket is provided in a contracted state;
- distally advancing the catheter and the extraction basket substantially simultaneously into the body passage and in proximity to a stone;
- distally advancing the extraction basket with respect to the catheter to deploy a plurality of resilient members of the extraction basket;
- capturing the stone between the plurality of resilient members;
- performing a mechanical lithotripsy procedure on the stone, using the plurality of resilient members, to crush the stone into a plurality of stone fragments;
- inflating the balloon;
- engaging at least one of the stone fragments with the inflated balloon;
- and
- urging at least one of the stone fragments out of the body passage using the inflated balloon.
A method suitable for removing at least one stone in a body passage, the method comprising:
- providing a catheter having proximal and distal regions, and a balloon coupled to an exterior surface of the catheter, wherein the balloon is provided in a deflated state;
- providing an extraction basket adapted to be advanced longitudinally within a working lumen of the catheter, wherein the extraction basket is provided in a contracted state;
- distally advancing the catheter and the extraction basket substantially simultaneously into the body passage and in proximity to a stone;
- distally advancing the extraction basket with respect to the catheter to deploy a plurality of resilient members;
- manipulating the plurality of resilient members to capture a relatively large stone;
- removing the captured relatively large stone from the body passage;
- proximally retracting the extraction basket into the working lumen of the catheter to cause the extraction basket to assume the contracted state;
- inflating the balloon;
- engaging at least one relatively small stone fragment with the inflated balloon;
- and
- urging at least one of the relatively small stone fragments out of the body passage using the inflated balloon.
Dependencies are inferred from the claim text.