US-12622697-B2 - Surgical stapling device with firing lockout member

Abstract

A surgical stapling device includes a tool assembly having an anvil assembly and a cartridge assembly, and a drive assembly. The cartridge assembly includes a staple cartridge having an actuation sled assembly and channel member that supports a lockout member. The lockout member includes a stop member that interacts with the drive assembly when the actuation sled assembly is not present within a proximal portion of the staple cartridge to prevent advancement of the drive assembly and firing of the stapling device.

Inventors

• Jacob C. Baril
• Kenneth H. Whitfield
• Roanit Arthur Fernandes

Assignees

• COVIDIEN LP

Dates

Publication Date

20260512

Application Date

20230523

Claims (20)

1. 1 . A surgical stapling device comprising: an elongate body having a proximal portion and a distal portion; a tool assembly supported on the distal portion of the elongate body, the tool assembly including: an anvil assembly having a staple forming surface that defines a first knife slot; and a cartridge assembly coupled to the anvil assembly to facilitate movement of the tool assembly between open and clamped positions, the cartridge assembly including a channel member and a staple cartridge, the channel member having side walls and a bottom wall defining a channel, the bottom wall defining a second knife slot, the staple cartridge supported within the channel of the channel member and including a cartridge body, staples, pushers, and an actuation sled assembly, the cartridge body having a tissue engaging surface and defining a third knife slot and staple receiving slots positioned on each side of the third knife slot, the staples received in the staple receiving slots, the actuation sled assembly movable within the cartridge body from a sled retracted position to a sled advanced position to eject the staples from the staple receiving slots of the cartridge body, the actuation sled assembly including an actuation sled and a knife secured to the actuation sled, the actuation sled having a fin that extends through the second knife slot to a position outwardly of the channel, the knife including a knife blade having a cutting edge positioned within and extending above the tissue engaging surface of the cartridge body; a drive assembly including a working member, the working member positioned proximally of the actuation sled assembly and movable through the cartridge body between retracted and advanced positions to advance the actuation sled assembly from the sled retracted position to the sled advanced position; and a lockout member supported on an outer surface of the channel member, the lockout member being movable from a first position obstructing movement of the working member from the retracted position to the advanced position to a second position allowing movement of the working member from the retracted position to the advanced position, wherein the fin of the actuation sled is positioned to engage the lockout member when the actuation sled assembly is moved from the sled retracted position towards the sled advanced position to move the lockout member from the first position to the second position.
2. 2 . The surgical stapling device of claim 1 , wherein the lockout member includes a stop member that extends across the second knife slot, and the fin of the actuation sled is positioned to engage the stop member to move the lockout member from the first position to the second position.
3. 3 . The surgical stapling device of claim 2 , wherein the fin has an angled distal cam surface and a proximal stop surface, the angled distal cam surface configured to move the lockout member from the first position to the second position.
4. 4 . The surgical stapling device of claim 3 , wherein the lockout member includes a lance that extends distally from the stop member, the lance positioned to engage the proximal stop surface of the fin to prevent movement of the actuation sled assembly to the sled retracted position.
5. 5 . The surgical stapling device of claim 4 , wherein the actuation sled assembly includes a retraction link that is moveable from a first position to a second position in response to movement of the actuation sled assembly from the sled retracted position towards the sled advanced position to couple the actuation sled assembly to the working member of the drive assembly.
6. 6 . The surgical stapling device of claim 5 , wherein the retraction link includes a protrusion, and the drive assembly defines an opening, the protrusion received within the opening when the retraction link is in the second position.
7. 7 . The surgical stapling device of claim 6 , wherein the working member includes first and second beams and a vertical strut connecting the first beam to the second beam, the vertical strut movable through the first, second, and third knife slots as the working member moves between the retracted and advanced positions.
8. 8 . The surgical stapling device of claim 7 , wherein the first beam includes a proximally facing cam slot that is positioned to engage the lance when the working member moves from the advanced position to the retracted position to move the lockout member from the first position to the second position.
9. 9 . The surgical stapling device of claim 8 , wherein the first beam includes a distally facing cutout that is positioned adjacent the fin of the actuation sled to allow the lance to engage the stop surface of the fin.
10. 10 . The surgical stapling device of claim 1 , further including a handle assembly coupled to the proximal portion of the elongate body.
11. 11 . A tool assembly comprising: an anvil assembly having a staple forming surface that defines a first knife slot; and a cartridge assembly coupled to the anvil assembly to facilitate movement of the tool assembly between open and clamped positions, the cartridge assembly including a channel member and a staple cartridge, the channel member having side walls and a bottom wall defining a channel, the bottom wall defining a second knife slot, the staple cartridge supported within the channel of the channel member and including a cartridge body, staples, pushers, and an actuation sled assembly, the cartridge body having a tissue engaging surface and defining a third knife slot and staple receiving slots positioned on each side of the third knife slot, the staples received in the staple receiving slots, the actuation sled assembly movable within the cartridge body from a sled retracted position to a sled advanced position to eject the staples from the staple receiving slots of the cartridge body, the actuation sled assembly including an actuation sled and a knife secured to the actuation sled, the actuation sled having a fin that extends through the second knife slot to a position outwardly of the channel, the knife including a knife blade having a cutting edge positioned within and extending above the tissue engaging surface of the cartridge body; a drive assembly including a working member, the working member positioned proximally of the actuation sled assembly and movable through the cartridge body between retracted and advanced positions to advance the actuation sled assembly from the sled retracted position to the sled advanced position; and a lockout member supported on an outer surface of the channel member, the lockout member being movable from a first position obstructing movement of the working member from the retracted position to the advanced position to a second position allowing movement of the working member from the retracted position to the advanced position, wherein the fin of the actuation sled is positioned to engage the lockout member when the actuation sled assembly is moved from the sled retracted position towards the sled advanced position to move the lockout member from the first position to the second position.
12. 12 . The tool assembly of claim 11 , wherein the lockout member includes a stop member that extends across the second knife slot, and the fin of the actuation sled is positioned to engage the stop member to move the lockout member from the first position to the second position.
13. 13 . The tool assembly device of claim 12 , wherein the fin has an angled distal cam surface and a proximal stop surface, the angled distal cam surface configured to move the lockout member from the first position to the second position.
14. 14 . The tool assembly of claim 13 , wherein the lockout member includes a lance that extends distally from the stop member, the lance positioned to engage the proximal stop surface of the fin to prevent movement of the actuation sled assembly to the sled retracted position.
15. 15 . The tool assembly of claim 14 , wherein the actuation sled assembly includes a retraction link that is moveable from a first position to a second position in response to movement of the actuation sled assembly from the sled retracted position towards the sled advanced position to couple the actuation sled assembly to the working member of the drive assembly.
16. 16 . The tool assembly of claim 15 , wherein the retraction link includes a protrusion, and the drive assembly defines an opening, the protrusion received within the opening when the retraction link is in the second position.
17. 17 . The tool assembly of claim 16 , wherein the working member includes first and second beams and a vertical strut connecting the first beam to the second beam, the vertical strut movable through the first, second, and third knife slots as the working member moves between the retracted and advanced positions.
18. 18 . The tool assembly of claim 17 , wherein the first beam includes a proximally facing cam slot that is positioned to engage the lance when the working member moves from the advanced position to the retracted position to move the lockout member from the first position to the second position.
19. 19 . The tool assembly of claim 18 , wherein the first beam includes a distally facing cutout that is positioned adjacent the fin of the actuation sled to allow the lance to engage the stop surface of the fin.
20. 20 . A cartridge assembly comprising: a channel member having side walls and a bottom wall defining a channel, the bottom wall defining a first knife slot; a staple cartridge supported within the channel of the channel member and including a cartridge body, staples, pushers, and an actuation sled assembly, the cartridge body having a tissue engaging surface and defining a second knife slot and staple receiving slots positioned on each side of the second knife slot, the staples received in the staple receiving slots, the actuation sled assembly movable within the cartridge body from a sled retracted position to a sled advanced position to eject the staples from the staple receiving slots of the cartridge body, the actuation sled assembly including an actuation sled and a knife secured to the actuation sled, the actuation sled having a fin that extends through the first knife slot to a position outwardly of the channel, the knife including a knife blade having a cutting edge positioned within and extending above the tissue engaging surface of the cartridge body; and a lockout member supported on an outer surface of the channel member of the cartridge assembly, the lockout member having a stop member that extends across the first knife slot, the lockout member being movable from a first locked position to a second unlocked position in response to movement of the actuation sled assembly from the sled retracted position towards the sled advanced position.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a National Stage Application of PCT/IB2023/055293 filed May 23, 2023, which claims benefit of and priority to U.S. Provisional Application No. 63/348,569 filed Jun. 3, 2022, and the disclosures of each of the above-identified applications are hereby incorporated by reference in their entirety. FIELD The disclosure is directed to surgical stapling devices and, more particularly, to surgical stapling devices having lockout mechanisms to prevent firing of the stapling device when the stapling device has a spent staple cartridge or when an actuation sled is not present in the staple cartridge. BACKGROUND Surgical stapling devices for simultaneously stapling and cutting tissue are well known in the art and include a tool assembly and a drive assembly. The tool assembly includes an anvil assembly and a cartridge assembly that are movable in relation to each other between open and clamped positions. The cartridge assembly has a channel member and a staple cartridge that is received within the channel member. Typically, the staple cartridge includes a cartridge body that supports staples, pushers, and an actuation sled, and the actuation sled is movable through the cartridge body from a retracted position to an advanced position into sequential engagement with the pushers to sequentially eject the staples from the cartridge body. In some stapling devices, a knife is supported on the actuation sled and is movable with the actuation sled through the cartridge body. The drive assembly is positioned proximally of the actuation sled and is movable in relation to the anvil and cartridge assemblies to advance the actuation sled and knife through the staple cartridge to move the tool assembly between open and clamped positions, to eject the staples from the cartridge body, and to cut tissue clamped between the anvil and cartridge assemblies. When a stapling device is fired with a spent staple cartridge or a staple cartridge that does not have an actuation sled present in the staple cartridge, staples will not be ejected from the staple cartridge. As such, cut tissue will not be sutured. A continuing need exists for a lockout of simple construction that can prevent advancement of a drive assembly of a stapling device through the staple cartridge when a sled is not present in a proximal portion of the staple cartridge. SUMMARY This disclosure is directed to a surgical stapling device includes a tool assembly having an anvil assembly, a cartridge assembly, and a drive assembly. The cartridge assembly includes a staple cartridge having an actuation sled assembly and channel member that supports a lockout member. The lockout member includes a stop member that interacts with the drive assembly when the actuation sled assembly is not present within a proximal portion of the staple cartridge to prevent advancement of the drive assembly and firing of the stapling device. Aspects of the disclosure are directed to a surgical stapling device including an elongate body, a tool assembly, a drive assembly, and a lockout member. The elongate body has a proximal portion and a distal portion. The tool assembly is supported on the distal portion of the elongate body and includes an anvil assembly and a cartridge assembly. The anvil assembly has a staple forming surface that defines a first knife slot. The cartridge assembly is coupled to the anvil assembly to facilitate movement of the tool assembly between open and clamped positions and includes a channel member and a staple cartridge. The channel member has side walls and a bottom wall that defines a channel. The bottom wall defines a second knife slot. The staple cartridge is supported within the channel of the channel member and includes a cartridge body, staples, pushers, and an actuation sled assembly. The cartridge body has a tissue engaging surface and defines a third knife slot and staple receiving slots positioned on each side of the third knife slot. The staples are received in the staple receiving slots. The actuation sled assembly is movable within the cartridge body from a sled retracted position to a sled advanced position to eject the staples from the staple receiving slots of the cartridge body. The actuation sled assembly includes an actuation sled and a knife secured to the actuation sled. The actuation sled has a fin that extends through the second knife slot to a position outwardly of the channel. The knife includes a knife blade having a cutting edge positioned within and extending above the tissue engaging surface of the cartridge body. The drive assembly includes a working member that is positioned proximally of the actuation sled assembly and is movable through the cartridge body between retracted and advanced positions to advance the actuation sled assembly from the sled retracted position to the sled advanced position. The lockout member is supported on an outer surface of the channel member and is movable