Variable expansion frame system for deploying medical devices and methods of use
First Claim
1. A method for deploying a medical device within a body, comprising the steps of:
- introducing a cannula into a blood vessel;
inserting an expansion frame system through a first lumen of the cannula into the blood vessel, the expansion frame system comprising an outer wire having a second lumen and a longitudinal axis, an inner wire disposed axially through the second lumen, and a frame fixedly attached at a first circumferential point on the frame to a distal end of the outer wire, and fixedly attached at a second circumferential point on the frame to a distal end of the inner wire, wherein the outer wire and inner wire extend, starting from the first and second circumferential points respectively, in a generally proximal direction, wherein the first circumferential point is circumferentially displaced from the second circumferential point, and wherein the outer wire is axially displaceable relative to the inner wire; and
displacing a proximal end of the outer wire axially relative to a proximal end of the inner wire to rotate the frame as a whole about an axis that is substantially perpendicular to the longitudinal axis to expand the frame diametrically so as to circumferentially engage the endolumenal surface of the blood vessel; and
wherein the outer wire and inner wire are attached at their distal-most tips to the first and second circumferential points, respectively, and the inner wire has a stiffness sufficient to avoid buckling while rotating the frame.
2 Assignments
0 Petitions
Accused Products
Abstract
An expansion frame system for deploying medical devices in a patient'"'"'s body cavity. The system typically includes an inner wire disposed within a lumen of an outer wire. Distal ends of the inner and outer wires are attached to a substantially circular frame at first and second points. During use, the outer wire is displaced relative to the inner wire, causing the circular frame to rotate about an axis perpendicular to the line defined by the first and second points. Medical devices, such as a filter, a stent, an occluder or a manometer, can be mounted on the circular frame. The diameter of the expansion frame can be varied to achieve optimal contact with the luminal wall of the body cavity. Methods of using the expansion frame system for temporary or permanent placement of a medical device is disclosed.
33 Citations
28 Claims
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1. A method for deploying a medical device within a body, comprising the steps of:
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introducing a cannula into a blood vessel; inserting an expansion frame system through a first lumen of the cannula into the blood vessel, the expansion frame system comprising an outer wire having a second lumen and a longitudinal axis, an inner wire disposed axially through the second lumen, and a frame fixedly attached at a first circumferential point on the frame to a distal end of the outer wire, and fixedly attached at a second circumferential point on the frame to a distal end of the inner wire, wherein the outer wire and inner wire extend, starting from the first and second circumferential points respectively, in a generally proximal direction, wherein the first circumferential point is circumferentially displaced from the second circumferential point, and wherein the outer wire is axially displaceable relative to the inner wire; and displacing a proximal end of the outer wire axially relative to a proximal end of the inner wire to rotate the frame as a whole about an axis that is substantially perpendicular to the longitudinal axis to expand the frame diametrically so as to circumferentially engage the endolumenal surface of the blood vessel; and wherein the outer wire and inner wire are attached at their distal-most tips to the first and second circumferential points, respectively, and the inner wire has a stiffness sufficient to avoid buckling while rotating the frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus suitable for filtering emboli from a patient'"'"'s blood vessel during an open surgical procedure, comprising:
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an elongated member having an axial lumen and a distal region having a distal end, a longitudinal axis, and an opening; a support hoop fixedly attached at a first circumferential point to the distal end of the elongated member; a suspension member extending through the axial lumen and the opening and fixedly attached to the support hoop at a second circumferential point thereof so as to couple the support hoop to the distal region so that the support hoop is disposed obliquely relative to the longitudinal axis, wherein the second circumferential point is at least 30 degrees away from the first circumferential point and wherein the elongated member and suspension member extend, starting from the first and second circumferential points respectively, in a generally proximal direction; and a blood permeable sac affixed to the support hoop so that the support hoop forms a mouth of the blood permeable sac; whereby the elongated member is displaceable axially relative to the suspension member to rotate the support hoop as a whole about an axis perpendicular to the longitudinal axis; and wherein the outer wire and inner wire are attached at their distal-most tips to the first and second circumferential points, respectively, and the inner wire has a stiffness sufficient to avoid buckling while rotating the frame. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A medical device comprising:
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a cannula having a proximal end, a distal end, and a first lumen therebetween; an outer wire having a second lumen and dimensioned to pass through the first lumen; an inner wire having a longitudinal axis, said inner wire disposed axially through the second lumen, whereby the outer wire is displaceable axially relative to the inner wire; a frame fixedly attached at a first point on the frame to a distal end of the outer wire, and fixedly attached at a second point on the frame to a distal end of the inner wire, wherein the second point is positioned at least 30 degrees from the first point and wherein the outer wire and inner wire extend, starting from the first and second points respectively, in a generally proximal direction; wherein axial displacement of the outer wire relative to the inner wire causes rotation of the frame as a whole about a rotation axis perpendicular to the longitudinal axis; and wherein the outer wire and inner wire are attached at their distal-most tips to the first and second circumferential points, respectively, and the inner wire has a stiffness sufficient to avoid buckling while rotating the frame. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A medical device comprising:
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a cannula having a proximal end, a distal end, and a first lumen therebetween; an outer wire having a second lumen and dimensioned to pass through the first lumen; an inner wire having a longitudinal axis, said inner wire disposed axially through the second lumen, whereby the outer wire is displaceable axially relative to the inner wire; a frame fixedly attached at a first point on the frame to a distal end of the outer wire, and fixedly attached at a second point on the frame to a distal end of the inner wire, wherein the second point is positioned at least 30 degrees from the first point and wherein the outer wire and inner wire are attached at their distal-most tips to the first and second points, respectively, and the inner wire has a stiffness sufficient to avoid buckling while rotating the frame P1 wherein axial displacement of the outer wire relative to the inner wire causes rotation of the frame as a whole about a rotation axis perpendicular to the longitudinal axis.
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Specification