Device for detaching parietal thrombi from a blood vessel
First Claim
1. A device for detaching a parietal thrombus from a body vessel comprising:
- a catheter including at least one catheter section disposed longitudinally relative to the catheter;
a catheter wall including at least one wall opening passing completely through the catheter wall;
the catheter wall being disposed longitudinally relative to the least one catheter section and comprising a resiliently deformable material, the at least one wall opening including a separating gap wound helically with a constant pitch around the catheter wall at least in parts of the at least one catheter section including a cut passing completely through the catheter wall having two faces which include cutting edges that contact each other when the separating gap is closed, the catheter in a distal direction from the separating gap including a fixing device configured for releasably fixing the catheter to the body vessel;
means configured for severing at least part of the parietal thrombus from the body vessel including the cutting edges which are responsive to removal of torque acting on the catheter when the parietal thrombus is at least partially within the opening to sever the at least part of the parietal thrombus;
the catheter being configured so that torque acting on the catheter causes diameter of the catheter to expand from a smaller catheter outer diameter when the faces including the cutting edges contact each other to a larger catheter outer diameter which is constant along the catheter and causes the separating gap to change from being closed to being opened with the faces including the cutting edges being separated; and
the catheter, in an absence of an external constraint being applied thereto while the parietal thrombus is at least partially within the opening, is configured to spontaneously adopt the smaller catheter outer diameter due to resilient restoring forces of the resiliently deformable material causing the separating gap to close to activate the means configured for severing to cause the cutting edges to sever at least part of the parietal thrombus from the body when the parietal thrombus is at least partially within the opening; and
whereinthe fixing device comprises a dilatable balloon mounted on the catheter and is either spaced distally from the separating gap or is positioned distally from the catheter, and the balloon is inflatable by a lumen which is disposed along the lumen.
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Accused Products
Abstract
A device for detaching parietal thrombi from a bodily vessel is described having a catheter including at least one catheter section with a catheter wall with at least one wall opening which passes completely through the catheter wall. The catheter wall along the least one catheter section is made of a resiliently deformable material in which the at least one wall opening includes a separating helical gap wound around the catheter wall at least in parts along the catheter section. A fixing device permits releasable fixing of the catheter on a bodily vessel so that the catheter can be converted, exclusively by an external mechanical constraint in the form of a torque acting torsionally on the catheter, from a state of smaller catheter outer diameter to a state of larger catheter outer diameter.
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Citations
14 Claims
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1. A device for detaching a parietal thrombus from a body vessel comprising:
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a catheter including at least one catheter section disposed longitudinally relative to the catheter; a catheter wall including at least one wall opening passing completely through the catheter wall; the catheter wall being disposed longitudinally relative to the least one catheter section and comprising a resiliently deformable material, the at least one wall opening including a separating gap wound helically with a constant pitch around the catheter wall at least in parts of the at least one catheter section including a cut passing completely through the catheter wall having two faces which include cutting edges that contact each other when the separating gap is closed, the catheter in a distal direction from the separating gap including a fixing device configured for releasably fixing the catheter to the body vessel; means configured for severing at least part of the parietal thrombus from the body vessel including the cutting edges which are responsive to removal of torque acting on the catheter when the parietal thrombus is at least partially within the opening to sever the at least part of the parietal thrombus; the catheter being configured so that torque acting on the catheter causes diameter of the catheter to expand from a smaller catheter outer diameter when the faces including the cutting edges contact each other to a larger catheter outer diameter which is constant along the catheter and causes the separating gap to change from being closed to being opened with the faces including the cutting edges being separated; and the catheter, in an absence of an external constraint being applied thereto while the parietal thrombus is at least partially within the opening, is configured to spontaneously adopt the smaller catheter outer diameter due to resilient restoring forces of the resiliently deformable material causing the separating gap to close to activate the means configured for severing to cause the cutting edges to sever at least part of the parietal thrombus from the body when the parietal thrombus is at least partially within the opening; and
whereinthe fixing device comprises a dilatable balloon mounted on the catheter and is either spaced distally from the separating gap or is positioned distally from the catheter, and the balloon is inflatable by a lumen which is disposed along the lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification