Surgical stapling device with curved tool assembly

Patent metadata

Field	Value
Publication number	US-11826044-B2
Application number	US-201917631096-A
Country	US
Kind code	B2
Filing date	Aug 2, 2019
Priority date	Aug 2, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A surgical stapling device includes a tool assembly having a U-shaped frame, an anvil assembly, and a cartridge assembly. The U-shaped frame has a proximal transverse portion, a longitudinal portion, and a distal transverse portion. The distal transverse portion and the proximal transverse of the U-shaped frame and the cartridge assembly have a common shape including a first linear portion defining a first axis, a second linear portion defining a second axis, and a third linear portion defining a third axis, the first axis being transverse to the longitudinal axis of the elongate body. In embodiments, a first radius of curvature is defined between the first linear portion and the second linear portion such that the first axis and the second axis define an angle β, and a second radius of curvature is defined between the second linear portion and the third linear portion such that the second axis and the third axis define an angle Ω.

First claim

The invention claimed is:

1. A surgical stapling device comprising:
an elongate body defining a longitudinal axis, the elongate body having a proximal portion and a distal portion; and
a tool assembly supported on the distal portion of the elongate body, the tool assembly including an anvil assembly, a cartridge assembly, and a U-shaped frame, the U-shaped frame having a distal frame portion extending transverse to the longitudinal axis, a proximal frame portion extending transverse to the longitudinal axis, and a longitudinal frame portion extending between the distal frame portion and the proximal frame portion, the anvil assembly supported on the distal frame portion and including an anvil plate;
the cartridge assembly supported between the proximal frame portion and the distal frame portion and being movable in relation to the anvil assembly from a retracted position in which the cartridge assembly is spaced from the anvil assembly to an advanced position in which the cartridge assembly is in juxtaposed alignment with the anvil assembly, the cartridge assembly including a housing defining a cavity, a staple pusher positioned within the cavity, a knife holder positioned within the cavity, a knife supported on the knife holder, and an alignment pin, the knife including side edges, and a cutting edge that extends in a direction transverse to the longitudinal axis;
the alignment pin supported within the housing of the cartridge assembly at a position spaced from the longitudinal frame portion, the alignment pin movable between a retracted position recessed within the housing and an advanced position extending from the housing into engagement with the anvil assembly, the alignment pin including a guide surface that faces the longitudinal portion of the U-shaped frame, the guide surface having a distal portion that is angled towards the longitudinal portion, the knife being movable from a retracted position recessed within the housing to an advanced position extending from the housing, wherein a first side edge of the side edges of the knife is positioned to move along the guide surface of the alignment pin such that engagement of the first side edge of the knife with the distal portion of the guide surface compresses the first side edge of the knife.

2. The surgical stapling device of claim 1 , wherein the tool assembly includes a guide plate supported on the longitudinal portion of the U-shaped frame, the guide plate having a guide surface including a distal portion that is angled inwardly away from the longitudinal portion of the U-shaped frame towards the alignment pin, a second side edge of the side edges of the knife positioned to move along the guide surface of the guide plate such that engagement of the second side edge of the knife with the distal portion of the guide surface of the guide plate compresses the second side edge of the knife.

3. The surgical stapling device of claim 2 , wherein the knife has a first wing on the first side edge of the knife and a second wing on the second side edge of the knife, the first wing positioned to engage the guide surface of the alignment pin and the second wing positioned to engage the guide surface of the guide plate.

4. The surgical stapling device of claim 1 , further including a handle assembly, wherein the elongate body extends distally from the handle assembly.

5. The surgical stapling apparatus of claim 1 , wherein the anvil assembly includes an anvil plate and a cutting plate supported on the distal frame portion of the U-shaped frame of the tool assembly, the anvil plate positioned to receive and deform the staples and the cutting plate positioned to engage the knife.

6. The surgical stapling device of claim 5 , wherein the cutting plate is sandwiched between the distal frame portion and the anvil plate, and the anvil plate defines a knife slot to facilitate passage of the knife through the anvil plate.

7. The surgical stapling device of claim 6 , wherein the cutting plate is formed from a plastic material selected from the group consisting of a polyether ether ketone (PEEK) material, a polyoxymethylene (POM) material, and a polyphenylsulfone material (PPSU).

8. A surgical stapling device comprising:
an elongate body defining a longitudinal axis, the elongate body having a proximal portion and a distal portion; and
a tool assembly supported on the distal portion of the elongate body, the tool assembly including an anvil assembly, a cartridge assembly, and a U-shaped frame, the U-shaped frame having a distal frame portion extending transverse to the longitudinal axis, a proximal frame portion extending transverse to the longitudinal axis, and a longitudinal frame portion extending between the distal frame portion and the proximal frame portion, the anvil assembly supported on the distal frame portion and including an anvil plate;
the cartridge assembly supported between the proximal frame portion and the distal frame portion and being movable in relation to the anvil assembly from a retracted position in which the cartridge assembly is spaced from the anvil assembly to an advanced position in which the cartridge assembly is in juxtaposed alignment with the anvil assembly, the cartridge assembly including a housing defining a cavity, a staple pusher positioned within the cavity, a knife holder positioned within the cavity, a knife supported on the knife holder, and an alignment pin, the knife including side edges, and a cutting edge that extends in a direction transverse to the longitudinal axis;
the alignment pin supported within the housing at a position spaced from the longitudinal frame portion, the alignment pin movable between a retracted position recessed within the housing and an advanced position extending from the housing into engagement with the anvil assembly;
wherein the tool assembly includes a guide plate supported on the longitudinal portion of the U-shaped frame, the guide plate having a guide surface including a distal portion that is angled inwardly away from the longitudinal portion of the U-shaped frame towards the alignment pin, wherein a first side edge of the side edges of the knife is positioned to move along the guide surface of the guide plate such that engagement of the first side edge of the knife with the distal portion of the guide surface of the guide plate compresses the first side edge of the knife.

9. The surgical stapling device of claim 8 , further including a handle assembly, wherein the elongate body extends distally from the handle assembly.

10. The surgical stapling apparatus of claim 8 , wherein the anvil assembly includes an anvil plate and a cutting plate supported on the distal frame portion of the U-shaped frame of the tool assembly, the anvil plate positioned to receive and deform the staples and the cutting plate positioned to engage the knife.

11. The surgical stapling device of claim 10 , wherein cutting plate is sandwiched between the distal frame portion and the anvil plate, the anvil plate defining a knife slot to facilitate passage of the knife through the anvil plate.

12. The surgical stapling device of claim 10 , wherein the cutting plate is formed from a plastic material selected from the group consisting of a polyether ether ketone (PEEK) material, a polyoxymethylene (POM) material, and a polyphenylsulfone material (PPSU).

13. A tool assembly comprising:
a frame having a distal frame portion, a proximal frame portion spaced from the distal frame portion, and a longitudinal frame portion connecting the distal frame portion to the proximal frame portion, the longitudinal frame portion defining a first axis and the proximal frame portion and the distal frame po

Assignees

• Covidien Lp

Inventors

• Zhang Jiangfeng
• Zhang Xini
• Ahamed Syed Sarfraz
• Xu Shunhong
• Ren Ping
• Hazra Manojit
• Varadhan Sridharan
• Guo Zhinan

Classifications

• A61B17/072 Primary

  for applying a row of staples in a single action, e.g. the staples being applied simultaneously · CPC title

• A61B2017/00831

  Material properties · CPC title

• A61B2017/07221

  curved · CPC title

• A61B2017/07257

  characterised by its anvil · CPC title

• A61B2017/07271

  characterised by its cartridge · CPC title