SYSTEM AND METHOD FOR REMOVAL OF MATERIAL FROM A BLOOD VESSEL USING A SMALL DIAMETER CATHETER
First Claim
Patent Images
1. A small-diameter material-removal device, comprising:
- a thin-walled outer sheath including a proximal end and a distal end;
a core wire having a proximal end and a distal end, the core wire having an opposing actuator handle at the proximal end that extends from the proximal end of the sheath; and
a capture segment having a proximal end attached to the distal end of the sheath and a distal end attached to the distal end of the core wire, the capture segment having a collapsed state and an expanded state of a predetermined shape, the core wire being constructed and arranged so that applying axial movement to the handle causes the capture segment to controllably expand between the collapsed state and the expanded state for engaging a material within a blood vessel, wherein the capture segment remains in the expanded state for moving the material.
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Abstract
This invention provides a small diameter snare device and device for thrombus removal consisting of a hollow, elongate, thin-walled outer sheath. A single central core wire extends through the entire length of the sheath. The outer diameter of the core wire is sized close to the inner diameter of the sheath while allowing for axial sliding, in order to maximize the support to the body portion of the snare device. A tool tip or “capture segment” at the distal end of the sheath and core wire can be controllably expanded to engage a thrombus and remove the thrombus from the blood vessel.
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Citations
26 Claims
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1. A small-diameter material-removal device, comprising:
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a thin-walled outer sheath including a proximal end and a distal end; a core wire having a proximal end and a distal end, the core wire having an opposing actuator handle at the proximal end that extends from the proximal end of the sheath; and a capture segment having a proximal end attached to the distal end of the sheath and a distal end attached to the distal end of the core wire, the capture segment having a collapsed state and an expanded state of a predetermined shape, the core wire being constructed and arranged so that applying axial movement to the handle causes the capture segment to controllably expand between the collapsed state and the expanded state for engaging a material within a blood vessel, wherein the capture segment remains in the expanded state for moving the material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for use with a small-diameter material-removal device having a thin-walled outer sheath including a proximal end and a distal end, the device further having a core wire having a proximal end and a distal end, the core wire having an opposing actuator handle at the proximal end that extends from the proximal end of the sheath, the device further having a capture segment having a proximal end attached to the distal end of the sheath and a distal end attached to the distal end of the core wire, the capture segment having a collapsed state and an expanded state of a predetermined shape, the method comprising:
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applying axial movement to the handle to cause the capture segment to controllably expand between the collapsed state and the expanded state; penetrating a material within a blood vessel with the capture segment in the collapsed state; and engaging the material with the capture segment, wherein the capture segment remains in the expanded state to move the material. - View Dependent Claims (24, 25)
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26. A method of making small-diameter material-removal device, comprising:
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providing a thin-walled outer sheath including a proximal end and a distal end; inserting a core wire into the outer sheath, the core wire having a proximal end and a distal end, the core wire having an opposing actuator handle at the proximal end that extends from the proximal end of the sheath; constructing a capture segment having a distal end and a proximal end, the capture segment having a collapsed state and an expanded state of a predetermined shape; attaching a capture segment at a proximal end to the distal end of the sheath; and attaching a distal end of the capture segment to the distal end of the core wire, the capture segment and the core wire being constructed and arranged so that applying axial movement to the handle causes the capture segment to controllably expand between the collapsed state and the expanded state.
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Specification