# US 8,784,445 B2 · Endovascular filter and retrieval apparatus

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- Number: US 8,784,445 B2
- Document ID: US8784445B2
- Status: Granted
- Kind: B2
- Application number: 13/193,482
- Filed: 2011-07-28
- Published: 2012-03-29
- Granted: 2014-07-22
- Earliest claimed: 2010-07-30
- Applicants: Erez Salik
- Inventors: Erez Salik
- Web page: https://patentgrep.com/patent/US8784445B2

## CPC

- A61F 2/0103: {With centering means}
- A61F 2/0105: {Open ended, i.e. legs gathered only at one side}
- A61F 2002/016: {made from wire-like elements}
- A61F 2230/005: Rosette-shaped, e.g. star-shaped
- A61F 2230/0067: conical
- A61F 2230/008: paraboloidal
- 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)

## Abstract

An intravascular filter comprising a plurality of struts extending from a central hub. The distal ends of the struts are curved to form an anchor to the vessel wall. The hub has a hook for retrieving the filter. The filter may be removed by employing a torque force to the hook, so as to disengage the strut ends from the vessel wall.

## Claims

### Claim 1

An intravascular filter for placement within a blood vessel, said filter comprising:
a central hub;
two or more struts extending from said hub;
said struts having a distal end, the distal end of said struts being unconnected to the distal end of adjacent struts of said struts;
the distal end of said struts being angled to form an anchor when placed in contact with a vessel wall, wherein said angle imparts a substantially hockey-stick shape to said struts.

### Claim 2 (depends on 1)

The filter of claim 1, wherein a retrieval structure is attached to said hub.

### Claim 3 (depends on 1)

The filter of claim 1, wherein said retrieval structure is a hook.

### Claim 4 (depends on 1)

The filter of claim 1, wherein said retrieval structure is a loop.

### Claim 5 (depends on 2)

The filter of claim 2, wherein said retrieval structure is attached to top end of said hub.

### Claim 6 (depends on 2)

The filter of claim 2, wherein said retrieval structure is attached to bottom end of said hub.

### Claim 7 (depends on 1)

The filter of claim 1 wherein two or more retrieval structures are attached to said hub.

### Claim 8 (depends on 1)

The filter of claim 1 wherein said struts are of varying lengths.

### Claim 9 (depends on 8)

The filter of claim 8, wherein said struts have distal ends that are angled.

### Claim 10 (depends on 8)

The filter of claim 8, wherein a curved structure is attached to said hub for facilitating retrieval of said filter.

### Claim 11 (depends on 8)

The filter of claim 8, wherein an angled structure is attached to said hub for facilitating retrieval of said filter.

### Claim 12 (depends on 1)

The filter in claim 1, wherein there are four or more struts extending from said hub.

### Claim 13 (depends on 12)

The filter in claim 12, wherein said struts are of alternating length relative to said hub.

### Claim 14 (depends on 1)

The filter in claim 1, wherein said distal end of said struts are oriented in varying directions with respect to the longitudinal axis of said filter.

### Claim 15 (depends on 1)

The filter of claim 1, wherein said distal end of said struts have a conical shape.

### Claim 16 (depends on 1)

The filter of claim 1, wherein said distal end of said struts are oriented in the same direction with respect to the longitudinal axis of said filter.