# US 10,869,684 B2 · Powered tissue resecting device

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- Number: US 10,869,684 B2
- Document ID: US10869684B2
- Status: Granted
- Kind: B2
- Application number: 15/895,407
- Filed: 2018-02-13
- Published: 2019-08-15
- Granted: 2020-12-22
- Earliest claimed: 2018-02-13
- Assignees: Covidien LP
- Applicants: Covidien LP
- Inventors: Dale E. Whipple
- Web page: https://patentgrep.com/patent/US10869684B2

## CPC

- A61B 17/32002: {with continuously rotating, oscillating or reciprocating cutting instruments}
- A61B 17/3205: Excision instruments
- A61B 17/42: Gynaecological or obstetrical instruments or methods {(ligaturing clamps or clips for the umbilical cord A61B17/122; curettage A61B17/320708)}
- A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)}
- A61B 2017/2948: {Sealing means, e.g. for sealing the interior from fluid entry}
- A61B 2017/320028: {with reciprocating movements}
- A61B 2017/320032: {Details of the rotating or oscillating shaft, e.g. using a flexible shaft}
- A61B 2090/0813: {Accessories designed for easy sterilising, i.e. re-usable}
- A61B 2217/005: with suction drainage system
- A61B 2217/007: with irrigation system
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A tissue resecting device includes an end effector assembly including a proximal hub housing and a cutting member extending distally from the proximal hub housing, and a handpiece assembly. The handpiece assembly includes a handle housing, a drive casing extending distally from the handle housing, a drive rotor extending through and distally from the drive casing, and a seal ring disposed about the drive rotor. In an at-rest position, the seal ring is sealingly engaged between the drive casing and the drive rotor to inhibit fluid ingress into the annular space. Upon engagement of the end effector assembly with the handpiece assembly, a portion of the proximal hub housing is configured to urge the seal ring from the at-rest position to a displaced position wherein the seal ring is displaced from the drive rotor to reduce friction therebetween upon rotation of the drive rotor relative to the drive casing.

## Claims

### Claim 1

A tissue resecting device, comprising:
an end effector assembly including a proximal hub housing and a cutting member extending distally from the proximal hub housing; and
a handpiece assembly, including:
a handle housing;
a drive casing extending distally from the handle housing;
a drive rotor extending through and distally from the drive casing; and
a seal ring disposed about the drive rotor, the seal ring having an at-rest position and a displaced position, wherein, in the at-rest position, the seal ring is sealingly engaged between the drive casing and the drive rotor to inhibit fluid ingress into an annular space defined therebetween, and wherein, in the displaced position, the seal ring is displaced from the drive rotor to reduce friction therebetween upon rotation of the drive rotor relative to the drive casing,
wherein, the end effector assembly is releasably engagable with the handpiece assembly and wherein, upon engagement of the end effector assembly with the handpiece assembly, a portion of the proximal hub housing is configured to urge the seal ring from the at-rest position to the displaced position, and
wherein, with the end effector assembly engaged with the handpiece assembly, the drive rotor is coupled to the cutting member and configured to drive rotation and reciprocation of the cutting member.

### Claim 2 (depends on 1)

The tissue resecting device according to claim 1, wherein the end effector assembly further includes an inner core disposed within the proximal hub housing, the cutting member coupled to the inner core and the inner core configured to couple to the drive rotor upon engagement of the end effector assembly with the handpiece assembly such that rotation of the drive rotor drives the rotation and reciprocation of the cutting member.

### Claim 3 (depends on 1)

The tissue resecting device according to claim 1, wherein the end effector assembly further includes a fixed outer shaft extending distally from the proximal hub housing and disposed about the cutting member.

### Claim 4 (depends on 1)

The tissue resecting device according to claim 1, wherein the proximal hub housing defines bayonet threading and wherein the drive casing defines bayonet threading configured to engage the bayonet threading of the proximal hub housing to engage the end effector assembly with the handpiece assembly.

### Claim 5 (depends on 1)

The tissue resecting device according to claim 1, wherein the handpiece assembly further includes a motor disposed within the handle housing, the motor configured to drive rotation of the drive rotor.