# US 11,304,713 B2 · Thrombosis macerating and aspiration devices for blood vessels

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- Number: US 11,304,713 B2
- Document ID: US11304713B2
- Status: Granted
- Kind: B2
- Application number: 16/563,390
- Filed: 2019-09-06
- Published: 2020-03-12
- Granted: 2022-04-19
- Earliest claimed: 2018-09-07
- Assignees: Merit Medical Systems, Inc.
- Applicants: Merit Medical Systems, Inc.
- Inventors: Andrew Hansen; Alex Singleton; John Hall; Christopher Cindrich; Richard P. Jenkins; Jeremy Snow; Jim Mottola; Clark Ragsdale
- Web page: https://patentgrep.com/patent/US11304713B2

## CPC

- A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)}
- A61B 17/3201: Scissors (for biopsy A61B10/02)
- 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 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)}
- A61B 2017/00778: {Operations on blood vessels (A61B2017/22097, A61B2017/320741 take precedence)}
- A61B 2017/22034: {for gripping the obstruction or the tissue part from inside}
- A61B 2017/22039: {eccentric}
- A61B 2017/22042: {Details of the tip of the guide wire}
- A61B 2017/22045: {fixed to the catheter; guiding tip}
- A61B 2017/22047: {Means for immobilising the guide wire in the patient}
- A61B 2017/22069: {Immobilising; Stabilising}
- A61B 2017/22079: {with suction of debris}
- A61B 2017/22084: {stone- or thrombus-dissolving}
- A61B 2017/320733: {with a flexible cutting or scraping element, e.g. with a whip-like distal filament member}
- A61B 2017/320766: {eccentric}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A thrombosis macerating and aspiration device for macerating and aspirating blood clots and blockages in a blood vessel is disclosed. In some embodiments, the macerating element of the device rotates and creates a partial vacuum to assist in the aspiration of the blood clot of blockage. The macerating element may have a variety of different designs and shapes and in some embodiments, the macerating element is expandable.

## Claims

### Claim 1

A catheter for macerating a blockage or clot, comprising:
a main tubular shaft having a distal end and a proximal end;
a guidewire disposed in the main tubular shaft;
a macerating element disposed on the guidewire adjacent the distal end, the macerating element comprising a plurality of struts that are expandable when the macerating element is disposed out of the main tubular shaft; and
a blade disposed within the macerating element on the guidewire, the blade configured to mechanically aspirate while it rotates.

### Claim 2 (depends on 1)

The catheter of claim 1, wherein at least one of the plurality of struts has a rate of twist that extends from a first end of the strut to a second end of the strut.

### Claim 3 (depends on 2)

The catheter of claim 2, wherein each strut has a different rate of twist.

### Claim 4 (depends on 1)

The catheter of claim 1, wherein each strut rotates about the guidewire, each strut rotating between 360 degrees to 540 degrees of rotation around the guidewire from a first end of each strut to a second end of the strut.

### Claim 5 (depends on 1)

The catheter of claim 1, wherein a first end of each strut is fixed to a first basket end and a second end of each strut is fixed to a second basket end, wherein the first basket end is configured to axially move relative to the second basket end, wherein axial movement of the first basket end toward the second basket end expands the basket, and wherein axial movement of the first basket end away from the second basket end collapses the basket.