Device and method for withdrawing a tubular body part
View Patent ↗A device for withdrawing a tubular body part such as a varicose vein is provided. A needle is inserted through a skin. The needle contains therein an engaging element in an undeployed state. After the needle is inserted, the engaging element is pushed out of the needle and is typically deployed inside the vein. The vein is now ready to be withdrawn by the deployed engaging element. Using a puncture device that also contains a deployable engaging element allows the puncture site to be small and causes less trauma to the surrounding tissue.
1. A method of withdrawing a tubular body part under a skin using a device including a needle having an inflexible needle tip and an inflexible cannula extending from a proximal hub of the device and terminating at the needle tip, the needle being inflexible throughout its length relative to the longitudinal needle axis, the method comprising:
puncturing the skin with the needle, the needle containing an undeployed engaging element;
pushing the undeployed engaging element out of the inserted needle for deployment within and engagement with an inner wall of a tubular body part to be withdrawn; and
pulling the needle and the deployed engaging element so as to withdraw through the punctured skin the tubular body part engaged by the engaging element.
2. The method according to claim 1 , prior to the step of pulling, further comprising rotating a deployment device that is slidably coupled with the needle and is attached to the engaging element so as to rotate the engaging element.
3. The method according to claim 2 , wherein the engaging element includes at least one hook, and the method further comprises, prior to the step of rotating, pulling the hook to engage the tubular body part.
4. The method according to claim 1 , wherein the engaging element includes at least one hook, and the method further comprises, pushing the needle with respect to the deployed engaging element so as to engage a posterior wall of the tubular body part with the hook.
5. The method according to claim 1 , prior to the step of pulling, further comprising retracting the deployed engaging element into the lumen of the needle without engaging the tubular body part.
6. The method according to claim 5 , after the step of retracting, further comprising removing the inserted needle containing the retracted engaging element for reinsertion at a different site.
7. A method of removing a vein comprising:
puncturing a skin and a vein underneath the skin with a needle, the needle containing an undeployed vein engaging element;
pushing the undeployed vein engaging element out of the needle and through the punctured vein to deploy the vein engaging element inside the vein; and
pulling the needle and the deployed vein engaging element so as to withdraw through the punctured skin the vein engaged by the engaging element.
8. The method according to claim 7 , prior to the step of pulling, further comprising rotating a deployment device that is slidably coupled with the needle and is attached to the vein engaging element so as to rotate the vein engaging element.
9. The method according to claim 8 , wherein the vein engaging element includes at least one hook, and the method further comprises, prior to the step of rotating, pulling the hook to engage the tubular body part.
10. The method according to claim 7 , wherein the vein engaging element includes at least one hook, and the method further comprises, pushing the needle with respect to the deployed vein engaging element so as to engage the tubular body part with the hook.