# US 10,500,034 B2 · Vascular filter system and method of deployment and retrieval of vascular filter

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- Number: US 10,500,034 B2
- Document ID: US10500034B2
- Status: Granted
- Kind: B2
- Application number: 15/747,641
- Filed: 2017-07-12
- Published: 2019-04-25
- Granted: 2019-12-10
- Earliest claimed: 2017-04-28
- Applicants: Kevin T. Lie
- Inventors: Kevin T. Lie
- Web page: https://patentgrep.com/patent/US10500034B2

## CPC

- A61F 2/0103: {With centering means}
- A61F 2/0105: {Open ended, i.e. legs gathered only at one side}
- A61L 31/022: {Metals or alloys}
- A61L 31/14: Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials}
- A61L 31/148: {Materials at least partially resorbable by the body}
- A61L 31/18: Materials at least partially X-ray or laser opaque
- A61F 2/011: {Instruments for their placement or removal}
- A61F 2002/016: {made from wire-like elements}
- A61F 2210/0004: bioabsorbable
- A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol
- A61F 2220/0016: with sharp anchoring protrusions, e.g. barbs, pins, spikes
- A61F 2230/0065: toroidal, e.g. ring-shaped, doughnut-shaped
- A61F 2230/0067: conical
- A61F 2250/003: differing in adsorbability or resorbability, i.e. in adsorption or resorption time
- A61F 2250/0098: radio-opaque, e.g. radio-opaque markers
- A61L 2400/16: Materials with shape-memory or superelastic properties
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)

## Abstract

A vascular filter system for deploying a vascular filter utilizes a plurality of tensors that extend radially outward from a deployment sheath. The ends of the tensors are coupled with an attachment ring of the vascular filter and a plurality of attachment barbs are coupled with the attachment ring for securing the filter to the vessel wall. A method for retrieving the vascular filter from the vessel utilizes a reverse curve catheter, a guidewire that extends there through and an intravascular snare. The guidewire is advanced around the filter and into the snare, which secures the guidewire around the filter for retrieval. A vessel distention device utilizes one or more distention tensors having a distention feature on the extended end, such as a blunt tip, to press on the inside vessel wall. The distention tensors extend out radially from a sheath to press on the vessel wall.

## Claims

### Claim 1

A vascular filter system comprising:
a) a vascular filter comprising:
i) an attachment ring;
ii) a plurality of attachment barbs coupled to the attachment ring;
iii) a plurality of filter strand threads coupled to the attachment ring and forming a vascular filter portion having filter openings,
wherein the vascular filter portion is coupled to the attachment ring;
b) a deployment sheath having a distal end opening;
c) a plurality of tensors, each of said plurality of tensors comprising:
an extended end;
a tensor coupler attached to said extended end;
wherein the plurality of tensors are retained within the deployment sheath;
wherein the tensor couplers are coupled with the attachment ring;
wherein each of the tensor couplers comprise a coupler slot that receives an inside surface of the attachment ring and extends around the attachment ring; and
wherein the plurality of tensors are shape memory material and wherein each are configured to extend radially outward from the distal end opening of the deployment sheath to press the attachment ring, and attachment barbs coupled thereto, against a vessel wall.

### Claim 2 (depends on 1)

The vascular filter system of claim 1, wherein the plurality of filter strand threads comprise a bioresorbable material.

### Claim 3 (depends on 1)

The vascular filter system of claim 1 wherein the plurality of filter strand threads consists essentially of a bioresorbable material.

### Claim 4 (depends on 1)

The vascular filter system of claim 1, wherein the filter openings have a dimension of no more than 10 mm.

### Claim 5 (depends on 1)

The vascular filter system of claim 1, wherein the filter openings have a dimension between 3 mm and 6 mm.

### Claim 6 (depends on 1)

The vascular filter system of claim 1, wherein the plurality of attachment barbs are metallic.

### Claim 7 (depends on 6)

The vascular filter system of claim 6, wherein the plurality of filter strand threads consists essentially of a bioresorbable material and wherein the plurality of attachment barbs are metallic.

### Claim 8 (depends on 1)

The vascular filter system of claim 1, wherein the plurality of filter strand threads comprises a plurality of ring strands that are offset from the attachment ring and a plurality of fill strands that are coupled with the plurality of ring strands.

### Claim 9 (depends on 8)

The vascular filter system of claim 8, wherein each of the plurality of fill strands extend from a first end coupled with the attachment ring to a second end coupled with the attachment ring.

### Claim 10 (depends on 1)

The vascular filter system of claim 1, wherein each of the plurality of attachment barbs comprises an insert end and a barb portion.

### Claim 11 (depends on 1)

The vascular filter system of claim 1, comprising a radiopaque material on the attachment ring.

### Claim 12 (depends on 1)

The vascular filter system of claim 1, comprising a radiopaque material on the attachment barb.

### Claim 13 (depends on 1)

The vascular filter system of claim 1, comprising a radiopaque material on the plurality of filter strand threads.

### Claim 14 (depends on 1)

The vascular filter system of claim 1, wherein a first portion of the plurality of filter strand threads have a higher dissolving rate than a second portion of the plurality of filter strand threads.

### Claim 15 (depends on 14)

The vascular filter system of claim 14, wherein the plurality of filter strand threads comprise a plurality of ring strands that are offset from the attachment ring and a plurality of fill strands that are coupled with the plurality of ring strands;
wherein each of the plurality of fill strands extend from a first end coupled with the attachment ring to a second end coupled with the attachment ring; and
wherein at least a portion of the ring strands have a higher dissolving rate than the plurality of fill strands.