DEVICE FOR CAPTURING DEBRIS IN BLOOD VESSELS
First Claim
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1. A device for capturing debris in blood vessels, the device comprising:
- a core wire that is arranged in a blood vessel;
a filter member that includes a baglike filter arranged in the blood vessel such that an opening faces an upstream side of blood flow, and a ringlike elastic wire rod that is attached around an opening edge part of the filter to be, in a spread state, formed in an annular shape spread by an elastic restoring force thereof, can be brought into two states, the two states comprising a folded state and the spread state of being spread in the blood vessel, and is attached to the core wire;
a plurality of linear bodies of which one end parts are respectively attached to a plurality of positions of the ringlike elastic wire rod and the other end parts are attached on a base side of the core wire with respect to the one end parts, the plurality of linear bodies connecting the filter member to the core wire; and
a slide tube inside which the core wire passes,the device configured such that, in a case of moving the slide tube toward a fore end side of the core wire from the spread state to thereby pull the linear bodies into the slide tube from the other end parts, the one end parts of the respective linear bodies and the plurality of positions of the ringlike elastic wire rod come close to each other, the plurality of positions being respectively attached to the one end parts, and the ringlike elastic wire rod is bent so as to hold a fore end part outer circumferential surface of the slide tube from radially outside, and brought into the folded state,further comprising a guide member having a guide surface that is, in the folded state, substantially formed between a fore end part of a holding part in the ringlike elastic wire rod and an outer circumferential surface of the slide tube on a base side with respect to the fore end part.
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Abstract
Provided is a device for capturing debris in blood vessels, which enables a filter member to be smoothly recovered, and has a simple structure leading to an easy operation. For this purpose, provided is an elastic steel wire that, in a folded state, extends in a direction toward a base of a slide tube from a fore end part of a holding part in a ringlike elastic wire rod along an outer side of the slide tube.
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Citations
16 Claims
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1. A device for capturing debris in blood vessels, the device comprising:
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a core wire that is arranged in a blood vessel; a filter member that includes a baglike filter arranged in the blood vessel such that an opening faces an upstream side of blood flow, and a ringlike elastic wire rod that is attached around an opening edge part of the filter to be, in a spread state, formed in an annular shape spread by an elastic restoring force thereof, can be brought into two states, the two states comprising a folded state and the spread state of being spread in the blood vessel, and is attached to the core wire; a plurality of linear bodies of which one end parts are respectively attached to a plurality of positions of the ringlike elastic wire rod and the other end parts are attached on a base side of the core wire with respect to the one end parts, the plurality of linear bodies connecting the filter member to the core wire; and a slide tube inside which the core wire passes, the device configured such that, in a case of moving the slide tube toward a fore end side of the core wire from the spread state to thereby pull the linear bodies into the slide tube from the other end parts, the one end parts of the respective linear bodies and the plurality of positions of the ringlike elastic wire rod come close to each other, the plurality of positions being respectively attached to the one end parts, and the ringlike elastic wire rod is bent so as to hold a fore end part outer circumferential surface of the slide tube from radially outside, and brought into the folded state, further comprising a guide member having a guide surface that is, in the folded state, substantially formed between a fore end part of a holding part in the ringlike elastic wire rod and an outer circumferential surface of the slide tube on a base side with respect to the fore end part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for capturing debris in blood vessels comprising:
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a core wire that is arranged in a blood vessel; a filter member that includes a baglike filter arranged in the blood vessel such that an opening faces an upstream side of blood flow, and a ringlike elastic wire rod attached around an opening edge part of the filter to be, in a spread state, formed in an annular shape spread by an elastic restoring force thereof, can be brought into two states, the two states comprising a folded state and the spread state of being spread in the blood vessel, and is attached to the core wire; and an elastic steel wire that is, in a natural state, formed in an annular shape spread by an elastic restoring force thereof, wherein one position thereof is attached to the core wire and arranged on a base end side, and opposite positions on a fore end side with respect to the position of the attachment to the core wire are respectively attached to opposite positions of the ringlike elastic wire rod, wherein the elastic steel wire is configured to;
be able to converge along the core wire to thereby deform the filter member from the spread state to the folded state;
in the spread state, annularly spread so as to intersect with the ringlike elastic wire rod; and
position a fore end side with respect to the opposite positions inside the filter. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification