IP Library › Granted Patent US 12,364,500
Granted Patent B2
US 12,364,500 · App. 17/751,770 · Granted Jul 22, 2025

Tissue resecting instrument

Inventor: Steven J. Barletta (Tewksbury, MA)
Assignee: COVIDIEN LP
A61B17/32002A61B90/98A61B2017/320032A61B2017/32004
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Quick Facts
Patent No.
US 12,364,500
App. No.
17/751,770
Granted
Jul 22, 2025
Kind
B2
Abstract

An end effector assembly of a tissue-resecting device is disclosed. The end effector assembly includes an outer shaft and an inner shaft. The outer shaft includes an outer shaft window defined within a distal end portion thereof. The outer shaft window defines an outer shaft cutting edge extending about at least a portion of a perimeter thereof. The outer shaft cutting edge includes a plurality of teeth. The inner shaft is disposed within and rotatable relative to the outer shaft, and includes an inner shaft window defined within a distal end portion thereof. The inner shaft window defines a toothless inner shaft cutting edge extending about at least a portion of a perimeter thereof. Rotation of the inner shaft relative to the outer shaft causes the inner shaft cutting edge to rotate toward the outer shaft cutting edge.

Claims (39)

1. An end effector assembly of a tissue-resecting device, the end effector assembly comprising:

an outer shaft including a proximal end portion, a distal end portion, and an outer shaft window defined within the distal end portion, the outer shaft window defining an outer shaft cutting edge extending about at least a portion of a perimeter thereof, the outer shaft cutting edge including a plurality of teeth;

an inner shaft disposed within and rotatable relative to the outer shaft, the inner shaft including a proximal end portion, a distal end portion, and an inner shaft window defined within the distal end portion, the inner shaft window defining an inner shaft cutting edge extending about at least a portion of a perimeter thereof, the inner shaft cutting edge being toothless, wherein rotation of the inner shaft relative to the outer shaft causes the inner shaft cutting edge to rotate toward the outer shaft cutting edge, wherein the inner shaft includes a distal driver disposed about the proximal end portion thereof;

a proximal driver slidably coupled to the distal driver in a fixed rotational orientation relative thereto such that rotation of the proximal driver drives rotation of the distal driver;

a retainer cap defining a pocket having an open end, the retainer cap disposed about at least a portion of the proximal driver and fixedly engaged with a hub housing of the outer shaft to thereby fix the retainer cap relative to the hub housing and the outer shaft, the retainer cap configured to selectively lock the proximal driver in fixed rotational orientation relative thereto, thereby selectively locking the inner shaft relative to the outer shaft; and

a radiofrequency identification chip (RFID chip) disposed within the pocket, wherein, with the retainer cap engaged with the hub housing, a portion of the hub housing closes the open end of the pocket to retain the RFID chip therein.

2. The end effector assembly according to claim 1 , wherein a distal end of the outer shaft window is disposed proximally of a distal-most end of the outer shaft.

3. The end effector assembly according to claim 2 , wherein the distal-most end of the outer shaft is blunt.

4. The end effector assembly according to claim 1 , wherein the distal end portion of the inner shaft includes only one inner shaft cutting edge.

5. The end effector assembly according to claim 1 , wherein the distal end portion of the outer shaft includes an outer shaft slot disposed opposite the outer shaft window.

6. The end effector assembly according to claim 1 , wherein the distal end portion of the inner shaft includes an inner shaft slot disposed opposite the inner shaft window at a proximal end of the distal end portion of the inner shaft.

7. The end effector assembly according to claim 1 , wherein the inner shaft cutting edge defines a length, and wherein an entirety of the length of the inner shaft cutting edge is defined by a single curve.

8. The end effector assembly according to claim 1 , further comprising a biasing spring extending between the proximal driver and the distal driver, the biasing spring configured to bias the proximal driver towards a locked position, wherein the retainer cap locks the proximal driver in fixed rotational orientation relative thereto.

9. The end effector assembly according to claim 8 , wherein the proximal driver is movable against the bias of the biasing spring to an unlocked position, wherein the proximal driver is unlocked from the retainer cap to permit relative rotation therebetween.

10. A tissue resecting instrument, comprising:

a handpiece assembly;

an end effector assembly extending distally from the handpiece assembly and defining a longitudinal axis, the end effector assembly including:

an elongated outer shaft having a distal end portion with an outer shaft window defined therein, the outer shaft window including a plurality of teeth surrounding at least a portion of a perimeter thereof;

an elongated inner shaft disposed coaxially with the elongated outer shaft, the elongated inner shaft having a distal end portion with an inner shaft window defined therein, the inner shaft window at least partially bounded by a toothless, inner shaft cutting edge, the elongated inner shaft rotatable about the longitudinal axis relative to the elongated outer shaft such that the inner shaft cutting edge rotates toward the plurality of teeth of the outer shaft window;

a distal driver disposed about a proximal end portion of the elongated inner shaft and a proximal driver slidably coupled to the distal driver, the proximal driver configured to drive rotation of the distal driver;

a retainer cap disposed about at least a portion of the proximal driver and engaged to the elongated outer shaft, the retainer cap configured to selectively lock the proximal driver in fixed rotational orientation relative thereto thereby selectively locking the elongated inner shaft relative to the elongated outer shaft; and

a radiofrequency identification chip (RFID chip) engaged with the retainer cap, wherein, with the retainer cap engaged to the elongated outer shaft, a portion of the elongated outer shaft retains the RFID chip in engagement with the retainer cap.

11. The tissue resecting instrument according to claim 10 , wherein the handpiece assembly includes an outflow port configured to connect to a fluid management system.

12. The tissue resecting instrument according to claim 10 , wherein the handpiece assembly includes a motor configured to cause rotation of the elongated inner shaft relative to the elongated outer shaft.

13. The tissue resecting instrument according to claim 10 , wherein a distal end of the outer shaft window is disposed proximally of a distal-most end of the elongated outer shaft.

14. The tissue resecting instrument according to claim 10 , wherein the distal end portion of the elongated inner shaft includes only one inner shaft cutting edge.

15. The tissue resecting instrument according to claim 10 , wherein the distal end portion of the elongated outer shaft includes an outer shaft slot disposed opposite the outer shaft window.

16. The tissue resecting instrument according to claim 10 , wherein the inner shaft cutting edge defines a length, and wherein an entirety of the length of the inner shaft cutting edge is defined by a single curve.

17. A tissue resecting instrument, comprising:

a handpiece assembly;

an end effector assembly extending distally from the handpiece assembly and defining a longitudinal axis, the end effector assembly including:

an outer shaft having a distal end portion with an outer shaft window defined therein, the outer shaft window including a plurality of teeth surrounding at least a portion of a perimeter thereof;

an inner shaft disposed coaxially with the outer shaft, the inner shaft having a distal end portion with an inner shaft window defined therein, the inner shaft window at least partially bounded by an inner shaft cutting edge, the inner shaft rotatable about the longitudinal axis relative to the outer shaft such that the inner shaft cutting edge rotates toward the plurality of teeth of the outer shaft window;

a distal driver disposed about a proximal end portion of the inner shaft and a proximal driver coupled to the distal driver, the proximal driver configured to drive rotation of the distal driver;

a retainer cap disposed about at least a portion of the proximal driver and engaged to the outer shaft, the retainer cap configured to selectively lock the proximal driver in fixed rotational orientation relative thereto thereby selectively locking the inner shaft relative to the outer shaft; and

a radiofrequency identification chip (RFID chip) secured in engagement with the retainer cap by a portion of the outer shaft.

18. The tissue resecting instrument according to claim 17 , further comprising a hub housing operably engaged to the outer shaft and configured to retain the RFID chip within a pocket defined in the retainer cap.

19. The tissue resecting instrument according to claim 17 , wherein a distal end of the outer shaft window is disposed proximally of the distal end portion of the outer shaft.

20. The tissue resecting instrument according to claim 17 , wherein the distal end portion of the outer shaft includes an outer shaft slot disposed opposite the outer shaft window.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 24, 2022
From: BARLETTA, STEVEN J.
To: COVIDIEN LP
Reel/Frame 059997/0387 →
Continuity (2)
Provisional Application 63193322 · May 26, 2021
Related Publication 20220378458A1 · Dec 1, 2022
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