CN-112641477-B - Suturing device with gap locking feature

Abstract

The present disclosure provides suturing devices having a gap locking feature. A tool assembly includes an anvil and cartridge assembly pivotally coupled to one another. A locking member is rotatably supported on the distal portion of the cartridge assembly and is positioned for receipt in a bore defined in the distal portion of the anvil. The locking member is operably coupled to the sled for advancing staples from the cartridge assembly. Advancement of the sled rotates the locking member relative to the aperture to access the distal portion of the anvil and cartridge assembly.

Inventors

• Roanit Fernandez
• Givan Shankar Sati Madil

Assignees

• 柯惠LP公司
• 柯惠LP公司

Dates

Publication Date

20260421

Application Date

20200915

Priority Date

20200731

Claims (20)

1. 1. A tool assembly, comprising: An anvil having a proximal portion and a distal portion, the distal portion of the anvil defining a bore therein; A cartridge assembly having a proximal portion and a distal portion, the proximal portion of the cartridge assembly pivotally coupled to the proximal portion of the anvil; a sled slidably received in the cartridge assembly and configured to move from a proximal position to a distal position to advance staples from the cartridge assembly, and A locking member rotatably supported on the distal portion of the cartridge assembly and positioned for receipt in the aperture, wherein the locking member is operably coupled to the sled such that advancement of the sled from the proximal position to the distal position rotates the locking member relative to the aperture to access the distal portion of the anvil and the distal portion of the cartridge assembly.
2. 2. The tool assembly of claim 1, wherein the locking member has an extension having a threaded outer surface and the bore in the distal portion of the anvil is defined by a threaded inner surface configured to threadably engage the threaded outer surface of the extension of the locking member.
3. 3. The tool assembly of claim 2, wherein the anvil and cartridge assembly are movable between an expanded position in which the extension of the locking member is spaced apart from the aperture in the anvil and a first approximated position in which the threaded outer surface of the extension of the locking member engages the threaded inner surface of the anvil.
4. 4. The tool assembly of claim 3, wherein the anvil and cartridge assembly are configured to move from the first approximated position to a second approximated position in response to rotation of the locking member when the threaded outer surface of the locking member is engaged with the threaded inner surface of the anvil.
5. 5. The tool assembly of claim 1, further comprising a tether having a proximal portion coupled to the carriage and a distal portion disposed about the locking member such that translation of the carriage rotates the locking member via the tether.
6. 6. The tool assembly of claim 5, wherein the locking member has a barrel portion rotatably supported in the cartridge assembly, and the distal end portion of the tether is secured about the barrel portion.
7. 7. The tool assembly of claim 6, further comprising a biasing member received in the barrel portion and coupled to the cartridge assembly, wherein the biasing member is configured to urge the tether in a distal direction.
8. 8. The tool assembly of claim 5, wherein the locking member is spring biased to urge the tether in a distal direction.
9. 9. The tool assembly of claim 5, wherein the tether is an annular band defining a plurality of apertures, the locking member having a plurality of circumferentially spaced protrusions configured for receipt in a corresponding plurality of apertures.
10. 10. The tool assembly of claim 9, wherein the slide has a pin extending therefrom and received in one of the plurality of apertures such that translation of the slide moves the endless belt along an endless path.
11. 11. The tool assembly of claim 1, wherein the distal portion of the anvil has a tissue dissector defining the aperture.
12. 12. A surgical stapling device, comprising: a handle assembly comprising a trigger; An elongate body extending distally from the handle assembly; A drive shaft having a proximal portion operably coupled to the trigger and a distal portion, and A tool assembly coupled to a distal portion of the elongate body, the tool assembly comprising: An anvil having a proximal portion and a distal portion, the distal portion of the anvil defining a bore therein; a cartridge assembly having a proximal portion and a distal portion, the proximal portion of the cartridge assembly pivotally coupled to the proximal portion of the anvil between an expanded position and an approximated position; a tether having a proximal portion coupled to the distal portion of the drive shaft, and a distal portion, and A locking member rotatably supported on the distal portion of the cartridge assembly and positioned for receipt in the aperture, wherein the distal portion of the tether is disposed about and coupled to the locking member such that when the cartridge assembly and anvil are in the approximated position, advancement of the drive shaft rotates the locking member relative to and within the aperture to approximate the distal portion of the anvil and the distal portion of the cartridge assembly.
13. 13. The surgical stapling device of claim 12, wherein said locking member has an extension having a threaded outer surface, said aperture in said distal portion of said anvil being defined by a threaded inner surface configured to threadably engage said threaded outer surface of said extension of said locking member when said anvil and cartridge assembly are in said approximated position.
14. 14. The surgical stapling device of claim 13, wherein in said expanded position said extension of said locking member is spaced apart from said aperture in said anvil, and in said approximated position said threaded outer surface of said extension of said locking member is engaged with said threaded inner surface of said anvil.
15. 15. The surgical stapling device of claim 12, wherein said locking member has a barrel portion rotatably supported in said cartridge assembly and securing said distal end portion of said tether about said barrel portion.
16. 16. The surgical stapling apparatus of claim 15, wherein said tool assembly further comprises a biasing member received in said barrel portion and coupled to said cartridge assembly, said biasing member configured to urge said tether in a distal direction.
17. 17. The surgical stapling device of claim 12, wherein said locking member is spring biased to urge said tether in a distal direction.
18. 18. The surgical stapling device of claim 12, wherein said tether is an annular band defining a plurality of apertures, said locking member having a plurality of circumferentially spaced projections configured for receipt in a corresponding plurality of apertures.
19. 19. The surgical stapling apparatus of claim 12, wherein said tool assembly further comprises a sled slidably received in said cartridge assembly and interconnecting said distal portion of said drive shaft with said proximal portion of said tether, said sled configured to move from a proximal position to a distal position to advance staples from said cartridge assembly in response to actuation of said trigger.
20. 20. The surgical stapling device of claim 19, wherein said locking member is configured to rotate in response to movement of said sled between said proximal position and said distal position.

Description

Suturing device with gap locking feature Cross Reference to Related Applications The present application claims the benefit and priority of U.S. provisional application No. 62/913,961 filed on 10/11 in 2019, the entire contents of which are incorporated herein by reference. Technical Field The present disclosure relates to a surgical stapling device, and more particularly, to a linear surgical stapling device having a tool assembly defining a tissue gap, and including a lockout feature to maintain the tissue gap during firing of the stapling device. Background Surgical stapling devices are commonly used to staple and/or cut tissue during various surgical procedures. Suturing and cutting of tissue may be accomplished more quickly using a surgical stapling device than conventional suturing techniques. In addition, endoscopic stitching devices may be used to perform less invasive surgical procedures than using conventional stitching techniques. Thus, it is desirable to use surgical stapling devices to perform certain surgical procedures to reduce patient trauma and to shorten patient recovery time. Generally, linear endoscopic surgical stapling devices include a tool assembly having a staple cartridge and an anvil assembly that are movable relative to one another between an open position and a clamped position. The staple cartridge defines a plurality of staple pockets that receive staples and the anvil assembly defines a plurality of staple deforming pockets. When the tool assembly is in the clamped position, the staple deforming recess of the anvil assembly is aligned with the staple recess of the staple cartridge such that the legs of the staples are received in and deformed within the staple deforming recess when the stapling apparatus is fired. The cartridge and anvil assembly must be properly aligned to achieve proper staple formation. In general, the staple cartridge and anvil assembly have proximal ends that are secured to one another by a pivot member such that the staple cartridge and anvil assembly can be pivoted from an open position in which the distal ends of the staple cartridge and anvil assembly are spaced apart from one another to a clamped position in which the staple cartridge and anvil assembly are aligned side-by-side. During the firing of staples from the staple cartridge, forces on the staple cartridge and anvil assembly for firing the staples tend to deflect the staple cartridge and anvil assembly outwardly away from one another. Knife bars (knife bars) are provided in some stapling devices that include upper and lower bars that engage the anvil assembly and the staple cartridge to minimize deflection of the anvil and cartridge assembly during firing. Disclosure of Invention One aspect of the present disclosure relates to a tool assembly that includes an anvil, a cartridge assembly, a sled (sled), and a locking member. The anvil and cartridge assemblies each have a proximal portion and a distal portion. The proximal portion of the cartridge assembly is pivotally coupled to the proximal portion of the anvil. The distal portion of the anvil defines a bore therein. A sled is slidably received in the cartridge assembly and is configured to move from a proximal position to a distal position to advance staples from the cartridge assembly. A locking member is rotatably supported on the distal portion of the cartridge assembly and is positioned for receipt in the aperture. The locking member is operably coupled to the sled such that advancement of the sled from the proximal position to the distal position rotates the locking member relative to the aperture to access the distal portion of the anvil and cartridge assembly. In aspects, the locking member may have an extension having a threaded outer surface. The bore in the distal portion of the anvil may be defined by a threaded inner surface configured to threadably engage with a threaded outer surface of the extension of the locking member. In aspects, the anvil and cartridge assembly are movable between an expanded position in which the extension of the locking member is spaced apart from the aperture in the anvil and a first approximated position in which the threaded outer surface of the extension of the locking member engages the threaded inner surface of the anvil. In aspects, the anvil and cartridge assembly can be configured to move from the first approximated position to the second approximated position in response to rotation of the locking member when the threaded outer surface of the locking member is engaged with the threaded inner surface of the anvil. In aspects, the tool assembly may further include a tether having a proximal portion coupled to the carriage and a distal portion disposed about the locking member such that translation of the carriage rotates the locking member via the tether. In aspects, the locking member can have a barrel portion rotatably supported in the cartridge assembly. The distal portion of the tether may