Catheter tip retention device
First Claim
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1. A catheter tip retention device comprising:
- a catheter tip having an outer circumferential wall and an opening through the outer circumferential wall for receiving an end of a catheter; and
a retaining ring constructed of a shape memory material set to a first configuration having a first diameter, wherein the retaining ring is configured to be expanded to a second configuration having a second diameter greater than the first diameter so that the ring has a circumference greater than the outer circumferential wall of the catheter tip, and so that the ring may be positioned over the outer circumferential wall of the catheter tip; and
wherein the retaining ring is configured to return towards its first diameter thereby coupling the end of the catheter to the catheter tip.
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Abstract
A catheter tip used reduce trauma in tracking a catheter through a body lumen is attached to the end of a catheter with a ring constructed of a shape memory alloy, e.g., nitinol. The ring is shape set to a small diameter, where the ring placed around the catheter tip holds the catheter tip onto an end of the catheter that is inserted into an slot in the catheter tip.
27 Citations
16 Claims
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1. A catheter tip retention device comprising:
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a catheter tip having an outer circumferential wall and an opening through the outer circumferential wall for receiving an end of a catheter; and
a retaining ring constructed of a shape memory material set to a first configuration having a first diameter, wherein the retaining ring is configured to be expanded to a second configuration having a second diameter greater than the first diameter so that the ring has a circumference greater than the outer circumferential wall of the catheter tip, and so that the ring may be positioned over the outer circumferential wall of the catheter tip; and
wherein the retaining ring is configured to return towards its first diameter thereby coupling the end of the catheter to the catheter tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13)
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11. A catheter tip retention device comprising:
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a catheter tip means for tracking a catheter through a body lumen, the catheter tip means having an outer circumferential wall means and an receiving means through the outer circumferential wall means for receiving an end of a catheter means; and
a retaining means for coupling the catheter tip means to an end of a catheter means, wherein the retaining means comprises a superelastic means for causing the retaining means to return to a first set configuration having a first diameter from a second expanded configuration having second diameter greater than the first diameter, to thereby couple the catheter tip means to the end of the catheter means. - View Dependent Claims (12)
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14. A method of manufacturing a catheter comprising the steps of:
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providing;
a catheter having an end;
a catheter tip having an outer circumferential wall and an opening through the outer circumferential wall for receiving the end of a catheter; and
a retaining ring constructed of a shape memory material set to first configuration having a first diameter;
inserting the end of the catheter into the opening of the catheter tip;
expanding the retaining ring to a second configuration having second diameter greater than the first diameter so that the ring has a circumference greater than the outer circumferential wall of the catheter tip;
positioning the ring over the outer circumferential wall of the catheter tip; and
causing the retaining ring to return towards its first diameter thereby coupling the end of the catheter to the catheter tip. - View Dependent Claims (15, 16)
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Specification