# US 9,750,509 B2 · Radially adjustable tissue removal device

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- Number: US 9,750,509 B2
- Document ID: US9750509B2
- Status: Granted
- Kind: B2
- Application number: 13/777,409
- Filed: 2013-02-26
- Published: 2013-07-04
- Granted: 2017-09-05
- Earliest claimed: 2004-03-03
- Assignees: Boston Scientific Scimed, Inc.
- Applicants: Boston Scientific Scimed, Inc.
- Inventors: Harold F. Carrison
- Web page: https://patentgrep.com/patent/US9750509B2

## CPC

- A61B 17/1671: {for the spine}
- 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 17/32002: {with continuously rotating, oscillating or reciprocating cutting instruments}
- 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 2017/00867: {shape memory effect}
- A61B 2017/22034: {for gripping the obstruction or the tissue part from inside}
- A61B 2017/2212: {having a closed distal end, e.g. a loop}
- A61B 2017/2215: {having an open distal end}
- A61B 2017/2905: {flexible}
- A61B 2017/2927: {the angular position of the head being adjustable with respect to the shaft}
- A61B 2017/320004: {abrasive}
- A61B 2017/320775: {Morcellators, impeller or propeller like means}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A tissue removal kit or assembly comprises a cannula and a tissue removal probe axially slidable within the cannula. The tissue removal probe comprises an elongated member a distal end configured to curve when distally deployed from the cannula. The tissue removal probe further comprises a drive shaft rotatably disposed within the member, and a rotatable tissue removal element (e.g., an abrasive burr) disposed on the drive shaft adjacent the member distal end. The curved member distal end may associate the tissue removal element, which has its own axis of rotation, with a radius of revolution about the longitudinal axis of the member. The member is laterally flexible and resilient, so that the radius of revolution can be adjusted. In this manner, the tissue removal element can remove tissue around an adjustable arc.

## Claims

### Claim 1

A tissue removal device, comprising:
a drive shaft defining an axial lumen;
a blunt, non-traumatic tip coupled to a distal end of the drive shaft, the tip having an aperture there through in fluid communication with the drive shaft lumen;
a tissue removal member carried on the drive shaft proximal to the tip;
a proximal adapter coupled to the elongated tubular member, the proximal adapter configured for operative coupling with a drive unit such that the drive shaft may be rotated by the drive unit, wherein the proximal adapter is further configured for coupling with an irrigation source to thereby place the irrigation source in fluid communication with the drive shaft lumen and tip aperture.

### Claim 2

A tissue removal assembly, comprising:
a cannula defining a lumen;
an elongated tubular member defining a lumen, wherein the tubular member is disposed within the cannula lumen;
a drive shaft defining a lumen, wherein the drive shaft is rotatably disposed within the elongated tubular member;
a blunt, non-traumatic tip coupled to a distal end of the drive shaft, the tip having an aperture there through in fluid communication with the drive shaft lumen;
a tissue removal member carried on the drive shaft proximal to the blunt tip;
a proximal adapter coupled to a proximal end of the elongated tubular member;
a drive unit operatively coupled to the drive shaft via the proximal adapter, such that the drive shaft may be rotated by the drive unit; and
an irrigation source in fluid communication with the drive shaft lumen and tip aperture.

### Claim 3 (depends on 2)

The assembly of claim 2, wherein the blunt tip is spherical.

### Claim 4 (depends on 2)

The assembly of claim 2, wherein the tissue removal member comprises an abrasive burr.

### Claim 5 (depends on 4)

The assembly of claim 4, the abrasive burr comprising a spiral cutting groove.

### Claim 6

A tissue removal device, comprising:
a sleeve having a lumen;
a proximal adapter at the proximal end of the sleeve;
a drive shaft disposed within the lumen of the sleeve;
a non-traumatic tip coupled to a distal most end of the tissue removal device; and
a tissue removal member on the drive shaft proximal to the tip.

### Claim 7 (depends on 6)

The assembly of claim 6, wherein the tissue removal member comprises an ellipsoidal burr and the ellipsoidal burr comprises a spiral cutting groove.

### Claim 8 (depends on 6)

The assembly of claim 6, wherein the drive shaft comprises a lumen.

### Claim 9 (depends on 8)

The assembly of claim 8, wherein the lumen of the drive shaft is configured to be in fluid communication with an irrigation source.