# US 8,465,508 B2 · Vascular ablation apparatus and method

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- Number: US 8,465,508 B2
- Document ID: US8465508B2
- Status: Granted
- Kind: B2
- Application number: 11/882,474
- Filed: 2007-08-02
- Published: 2007-12-06
- Granted: 2013-06-18
- Earliest claimed: 2003-05-21
- Assignees: Yale University
- Applicants: Michael G. Tal
- Inventors: Michael G. Tal
- Web page: https://patentgrep.com/patent/US8465508B2

## CPC

- A61B 17/00008: {Vein tendon strippers (tube strippers A61M1/83)}
- A61B 17/3207: Atherectomy devices {working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions (A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016)}
- A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)}
- A61B 17/320758: {with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002)}
- A61B 2017/00778: {Operations on blood vessels (A61B2017/22097, A61B2017/320741 take precedence)}
- A61B 2017/320004: {abrasive}
- A61B 2017/320012: {Brushes}
- A61B 2017/320733: {with a flexible cutting or scraping element, e.g. with a whip-like distal filament member}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An apparatus for the treatment of venous stasis includes an elongated intraluminal member shaped and dimensioned for passage through vessels of a subject. The intraluminal member includes a proximal end and a distal end. A conduit extends from proximate the proximal end of the intraluminal member to proximate the distal end of the intraluminal member. The conduit is shaped and dimensioned for fluid communication between the proximal end of the intraluminal member and the distal end of the intraluminal member. The distal end of the intraluminal member includes disruption means proximate thereto for ablating a predetermined vessel wall. A method is also provided for the treatment of venous stasis. The method is achieved by advancing an elongated intraluminal member through a vein to a treatment site, activating the intraluminal member for ablation of the treatment site and injecting sclerosant into the vein at the treatment site.

## Claims

### Claim 1

An apparatus for permanently occluding a vein, comprising:
an elongated intraluminal member shaped and dimensioned for passage through blood vessels of a subject, the intraluminal member including a proximal end and a distal end, wherein the distal end comprises a vein wall disruptor;
a sheath in which the intraluminal member is disposed, thereby defining an annular space between the intraluminal member and the sheath, wherein:
the sheath is shaped and dimensioned for fluid communication through the annular space between the proximal end and the distal end of the intraluminal member; and
the sheath is transitionable, relative to the intraluminal member, between a first state in which the sheath covers the disruptor, and a second state in which a length of the disruptor is exposed from the sheath, the length being long enough to allow contact of the disruptor with a vein wall; and
a motor coupled to the proximal end of the intraluminal member configured to drive a defined movement of the intraluminal member;
a source of sclerosant in fluid communication with the annular space such that sclerosant injected proximally flows through the annular space and exits at a distal end of the sheath;
wherein the vein wall disruptor comprises a disrupting portion that is configured with a size, sharpness, and position on the intraluminal member to contact and scrape a vein wall when driven by the motor in a manner that destroys endothelium of the vein wall and produces injury thereto, the disrupting portion being shaped and positioned to produce the injury in an amount sufficient to: (1) enhance the effect of the sclerosant, (2) facilitate the destruction of the vein, and (3) increase the likelihood of permanent vein occlusion from injected sclerosant.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein the disruptor is sinusoidal.

### Claim 3 (depends on 1)

The apparatus according to claim 1, wherein the disruptor is substantially V-shaped.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein the disruptor is substantially J-shaped distally.

### Claim 5 (depends on 1)

The apparatus according to claim 1, wherein the disruptor is circular.

### Claim 6 (depends on 1)

The apparatus according to claim 1, wherein the disruptor has a twisted circular shape.

### Claim 7 (depends on 1)

The apparatus according to claim 1, wherein the intraluminal member comprises a shape memory material and the apparatus further includes a stiffener associated with the distal end of the intraluminal member.

### Claim 8 (depends on 1)

The apparatus according to claim 1, wherein the disruptor comprises a balloon catheter.

### Claim 9 (depends on 1)

The apparatus according to claim 1, wherein the disruptor comprises a multi-prong assembly.

### Claim 10 (depends on 1)

The apparatus according to claim 1, further including means for movement of the intraluminal member to facilitate disruption or irritation of the vein wall.

### Claim 11 (depends on 1)

The apparatus according to claim 1, wherein the disruptor is curved.