Adapter, extension, and connector assemblies for surgical devices

Patent metadata

Field	Value
Publication number	US-2016296234-A1
Application number	US-201614991157-A
Country	US
Kind code	A1
Filing date	Jan 8, 2016
Priority date	Apr 10, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

An adapter assembly for connecting an end effector to an electrosurgical instrument is provided. The adapter assembly includes a drive transfer assembly, first and second pusher assemblies, a drive member, an extension assembly, and a trocar assembly. The drive transfer assembly includes first, second and third rotatable shafts. Each pusher assembly is operably connected to a rotatable shaft for converting rotational motion from one rotatable shaft to longitudinal movement to perform a different function. The drive member is operably connected to the third rotatable shaft for transferring rotational motion from the third rotatable shaft to perform a third function. The extension assembly is operably connected to a distal end of the adapter assembly and includes at least one flexible band assembly operably connected to one of the first and second pusher assemblies. The trocar assembly is configured for releasable engagement with the extension assembly.

First claim

1 . An adapter assembly for operably connecting an end effector to an electrosurgical instrument, the adapter assembly comprising:
a drive transfer assembly including first, second, and third rotatable shafts; a first pusher assembly operably connected to the first rotatable shaft for converting rotational motion from the first rotatable shaft to longitudinal movement to perform a first function; a second pusher assembly operably connected to the second rotatable shaft for converting rotational motion from the second rotatable shaft to longitudinal movement to perform a second function; a drive member operably connected to the third rotatable shaft for transferring rotational motion from the third rotatable shaft to perform a third function; an extension assembly operably connected to a distal end of the adapter assembly, the extension assembly including at least one flexible band assembly operably connected to one of the first and second pusher assemblies; and a trocar assembly configured for releasable engagement with the extension assembly.

2 . The adapter assembly of claim 1 , further comprising at least one retention member configured to releasably couple the trocar assembly with the extension assembly.

3 . The adapter assembly of claim 2 , wherein the at least one retention member includes a first retention member and a second retention member, wherein each of the first retention member and the second retention member is configured to engage a flat portion of the trocar assembly.

4 . The adapter assembly of claim 3 , wherein the first retention member is configured to engage the second retention member.

5 . The adapter assembly of claim 4 , wherein the second retention member is configured to engage the first retention member.

6 . The adapter assembly of claim 5 , wherein each of the first retention member and the second retention member is configured to engage a flat portion of the trocar assembly.

7 . The adapter assembly of claim 2 , wherein the at least one retention member includes a nub configured to releasably engage a respective detent of the trocar assembly.

8 . The adapter assembly of claim 2 , wherein the extension assembly defines a longitudinal axis, and wherein the at least one retention member is movable in a direction perpendicular to the longitudinal axis through an opening of the extension assembly and into engagement with the trocar assembly.

9 . An electromechanical circular stapling instrument, comprising:
a handle assembly; an elongated portion extending distally from the handle assembly and defining a longitudinal axis; a trocar assembly including a distal tip for penetrating tissue, the trocar assembly configured for releasable engagement with the elongated portion; and a first retention member and a second retention member configured to releasably couple the trocar assembly with the elongated portion, each of the first retention member and the second retention member configured to engage a flat portion of the trocar assembly, and wherein the first retention member is configured to engage the second retention member.

10 . The electromechanical circular stapling instrument of claim 9 , wherein the second retention member is configured to engage the first retention member.

11 . The electromechanical circular stapling instrument of claim 9 , wherein each of the first retention member and the second retention member includes a nub configured to releasably engage a respective detent of the trocar assembly.

12 . The electromechanical circular stapling instrument of claim 9 , wherein each of the first retention member and the second retention member is movable in a direction perpendicular to the longitudinal axis through an opening of the elongated portion and into engagement with the trocar assembly.

13 . A method of securing a trocar assembly to an elongated portion of a surgical instrument, the method comprising:
inserting a portion of a first retention member through a first opening in an outer wall of the elongated portion of the surgical instrument; inserting a portion of a second retention member through a second opening in the outer wall of the elongated portion of the surgical instrument; engaging the portion of the first retention member with a first flat portion of the trocar assembly; engaging the portion of the second retention member with a second flat portion of the trocar assembly; and engaging the first retention member with the second retention member.

14 . The method of claim 13 , further comprising engaging a nub of the first retention member with a first detent of the trocar assembly.

15 . The method of claim 14 , further comprising engaging a nub of the second retention member with a second detent of the trocar assembly.

16 . The method of claim 13 , wherein engaging the first retention member with the second retention member includes inserting an extension portion of the first retention member at least partially within a receptacle of the second retention member.

17 . The method of claim 16 , further comprising inserting an extension portion of the second retention member at least partially within a receptacle of the first retention member.

18 . The method of claim 17 , wherein inserting the extension portion of the first retention member at least partially within the receptacle of the second retention member and inserting the extension portion of the second retention member at least partially within the receptacle of the first retention member occur simultaneously.

19 . The method of claim 13 , wherein inserting the portion of the first retention member through the first opening in the outer wall of the elongated portion of the surgical instrument includes moving the first retention member in a direction perpendicular to a longitudinal axis defined by the elongated portion.

Assignees

• Covidien Lp

Inventors

• Richard Paul
• Cabrera Ramiro
• Paul Stephen
• Sapienza Jonathan

Classifications

• A61B2017/07271

  characterised by its cartridge · CPC title

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B17/34

  Trocars; Puncturing needles · CPC title

• A61B2017/00398

  using powered actuators, e.g. stepper motors, solenoids · CPC title

• A61B17/1155 Primary

  Circular staplers comprising a plurality of staples · CPC title