CN114680978A

CN114680978A - Surgical suturing and cutting device

Info

Publication number: CN114680978A
Application number: CN202011607221.7A
Authority: CN
Inventors: 单腾; 曹元阳
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-07-01

Abstract

The present invention provides a surgical stapling and cutting device, the device comprising: the side wall of the shell is provided with a window; the nail anvil is fixed inside the shell; the firing assembly is positioned on the proximal end side of the nail anvil, and anastomotic nails and a cutter are arranged inside the firing assembly; when the suturing and cutting device is fired, the driving assembly pushes the firing assembly to move towards the far end side direction of the suturing and cutting device, and an anastomotic nail and a cutter in the firing assembly are pushed out towards the nail anvil. The driving assembly drives the firing assembly to complete firing of the suturing and cutting device, tissue is sutured and cut through the anastomosis nails and the cutting knife in the firing assembly, the surgical suturing and cutting device is placed at a pathological change position in the using process, the tissue needing suturing and cutting is pulled into a position between the nail anvil and the firing assembly, the driving assembly is operated to close and fire the suturing and cutting device, the structure is simple, the operation is simple, and the use is convenient.

Description

Surgical suturing and cutting device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a surgical suturing and cutting device.

Background

In surgical procedures, it is often necessary to suture and cut some of the tissue within the body. For example, in performing a surgical operation, a portion of tissue is first sutured and simultaneously excised. As another example, fistulous tracts may be formed in the body for various reasons, which refer to pathological drainage tracts that are connected between the outside of the body and a luminal organ or between two luminal organs due to abscesses. In addition, in the benign lesions of anorectal fistulas, which are common in the alimentary canal, often the end physician needs to manually close the stoma while performing the surgical procedure. As another example, the resection of some small prolapsed tissue, and the like. Thus, suturing and cutting of the tissue surrounding the stoma is required to achieve stoma closure. Some instruments for suturing and cutting tissue have been proposed in the prior art, however, the existing instruments are often complex in structure and not flexible.

Disclosure of Invention

In view of the problems in the prior art, the invention aims to provide a surgical suturing and cutting device, wherein a driving assembly drives a firing assembly to complete the closing and firing of the suturing and cutting device, so as to suture and cut tissues.

An embodiment of the present invention provides a surgical suturing and cutting device, including:

the side wall of the shell is provided with a window;

the nail anvil is fixed inside the shell;

the firing assembly is positioned on the proximal end side of the nail anvil, and an anastomosis nail and a cutter are arranged inside the firing assembly;

when the suturing and cutting device is fired, the driving assembly pushes the firing assembly to move towards the far end side direction of the suturing and cutting device, and an anastomotic nail and a cutter in the firing assembly are pushed out towards the nail anvil.

In some embodiments, in the initial state, the firing assembly is located at a proximal side of the window, and when the driving assembly pushes the firing assembly to move toward a distal direction of the stapling device, the firing assembly gradually covers the window and pushes out staples and a cutting knife in the firing assembly toward the anvil.

In some embodiments, the firing assembly includes a nail magazine and a firing block, the nail magazine and the firing block are sequentially arranged along an axial direction of the stitching device from a distal end side to a proximal end side, the nail magazine is provided with the staples, and the firing block is provided with the cutting knife.

In some embodiments, the distal side of the nail bin is provided with a cutter groove and a nail hole, the distal side of the firing block is provided with a firing sheet, the position of the firing sheet corresponds to that of the nail hole, and the position of the cutter corresponds to that of the cutter groove.

In some embodiments, the cutter grooves are linear grooves or arc-shaped grooves, and the nail holes are located on the same side of the cutter grooves.

In some embodiments, the anvil is further provided with a cutting engagement portion corresponding to the position of the cutter slot.

In some embodiments, the cutting engagement portion is a knife anvil or a recess extending distally of the anvil.

In some embodiments, the staple cartridge has a first position and a second position, wherein in an initial state, the staple cartridge is in the first position, and when the stapling and cutting device is fired, the driving assembly pushes the staple cartridge to move towards the distal direction of the stapling and cutting device to the second position through the firing block;

when the nail bin is located at the second position, the driving assembly continues to push the firing block to move towards the direction of the far end side of the stitching device, and the firing block pushes out the anastomotic nails and the cutting knife in the nail bin towards the nail anvil.

In some embodiments, the firing assembly further comprises an elastic member, and two ends of the elastic member respectively support against the staple cartridge and the firing block.

In some embodiments, the resilient member is located inside the staple cartridge, a distal side of the resilient member abuts a distal side of the staple cartridge, and a proximal side of the resilient member abuts a distal side of the firing block;

when the nail bin is located at the first position, the firing block is at least partially located in the nail bin, the elastic piece has an initial compression amount, the nail bin is located at the second position, and when the driving assembly continues to push the firing block to move towards the distal end side direction of the stitching device, the firing block compresses the elastic piece so that the firing block continues to enter the nail bin.

In some embodiments, the drive assembly includes a drive handle rotatably coupled to the housing, the drive handle urging the firing assembly to move in a distal direction of the stapling device when the drive handle is moved in a first direction.

In some embodiments, the drive handle includes a firing engagement portion, a pivot portion, and a grip portion arranged in series, the pivot portion rotatably coupled to the housing, the firing engagement portion rotatably coupled to the firing assembly.

In some embodiments, the anvil and the firing assembly are disposed proximate to an inner sidewall of the housing, and the firing assembly and the pivot portion are disposed on opposite sides of a centerline of the housing.

In some embodiments, the proximal side of the housing is further provided with a fixed handle, the pivot of the actuating handle being rotatably connected with the fixed handle by a connecting pin.

In some embodiments, the driving assembly further includes a second elastic member, the first elastic member is elastically deformed when the driving handle is rotated in a first direction by an external force, the driving handle pushes the firing assembly to move towards a distal direction of the slit cutting device to fire the slit cutting device, and after the external force is removed, the driving handle is rotated in a second direction by an elastic deformation restoring force of the first elastic member.

In some embodiments, the second resilient member is located between the firing engagement portion and the housing or between the grip and the housing; the second elastic piece is an elastic sheet, a pressure spring or a tension spring with elasticity at least partially.

In some embodiments, the stapling device further comprises a guide rail extending along the axial direction of the stapling device, and the anvil, the staple cartridge and the firing block are sequentially sleeved on the guide rail.

In some embodiments, two guide rails are included, and two sides of the anvil, the staple cartridge and the firing block are respectively sleeved on the guide rails along the direction from the far end side to the near end side;

the nail bin comprises two nail bin guide parts which are positioned on two sides and sleeved on the guide rail, and the anastomotic nail and the cutter are positioned between the two nail bin guide parts.

In some embodiments, the housing defines a proximal opening at a proximal side thereof, the firing assembly at least partially extends into the interior of the housing from the proximal opening, and the drive assembly is coupled to the proximal side of the firing assembly.

In some embodiments, the distal side surface of the housing is an arcuate surface for guiding, the distal side of the arcuate surface defining a distal opening.

The surgical suturing and cutting device provided by the invention has the following advantages:

the invention provides an instrument for suturing and cutting tissues, which is characterized in that a driving assembly drives a firing assembly to complete the firing of a suturing and cutting device, anastomotic nails in the firing assembly are formed at a nail anvil to suture the tissues, a cutter in the firing assembly cuts the tissues, the surgical suturing and cutting device is placed at a pathological change position in the using process, the tissues to be sutured and cut are pulled between the nail anvil and the firing assembly, and the driving assembly is operated to close and fire the suturing and cutting device.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a front view of a surgical stapling and severing device according to an embodiment of the present invention in an initial state;

FIG. 2 is an exploded view of a surgical stapling and severing device in accordance with one embodiment of the present invention in an initial state;

FIG. 3 is a schematic view of the firing assembly and anvil of one embodiment of the present invention in an initial state;

FIGS. 4 and 5 are schematic views of the cooperating structure of the cartridge assembly and the cutter according to one embodiment of the present invention;

FIG. 6 is a schematic structural view of a firing block of one embodiment of the present invention;

FIG. 7 is a schematic structural view of a staple in accordance with one embodiment of the present invention;

FIG. 8 is a top view of the firing assembly and anvil of one embodiment of the present invention in an initial state;

FIG. 9 is a sectional view taken in the direction A1-A1 of FIG. 8;

FIG. 10 is a perspective view of a surgical stapling and severing device of one embodiment of the present invention, shown in a fired condition;

FIG. 11 is a schematic view of the engagement of the driving handle with the fixed handle according to one embodiment of the present invention;

FIG. 12 is a schematic view of the firing assembly and anvil of one embodiment of the present invention during firing;

FIG. 13 is a schematic view of the firing assembly and anvil of one embodiment of the present invention at the completion of firing;

FIG. 14 is a diagrammatic view of the staple cartridge, anvil and guide rail cooperation of one embodiment of the present invention;

FIG. 15 is a top view of the firing assembly and anvil of one embodiment of the present invention at the completion of firing;

FIG. 16 is a sectional view taken in the direction A2-A2 of FIG. 15;

FIG. 17 is a front view of a surgical stapling device reset after firing according to one embodiment of the present invention.

Reference numerals are as follows:

1 case 5 trigger block

11 distal 51 firing plate of housing

111 distal opening 52 firing guide

12 first pivot axis of fixed handle 54

122 first through hole 58 push surface

13 window 59 receiving groove

15 proximal opening 6 drive element

2 nail anvil 7 driving component

21 anvil guide 71 driving handle

22 anvil face 711 firing mating part

3 second pivot axis of nail bin assembly 7111

31 staple cartridge 712 pivot

311 cartridge guide part 7121 second through hole

312 nail bin surface 713 gripping part

3121 nail hole 7131 elastic member stop

313 cutter groove 72 connecting pin

32 first elastic member 73 second elastic member

33 first end of second elastic member of staple 731

331 a fixed end 732 a second end of the second elastic member

332 spine end 733 through groove

4 guide rail 9 cutter

41 distal side of guide rail 91 distal side of cutter

Proximal side 92 of guide rail the proximal side of the cutter

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus, a repetitive description thereof will be omitted.

The present invention provides a surgical stapling and cutting device comprising: the side wall of the shell is provided with a window; the nail anvil is fixed inside the shell; the firing assembly is positioned on the proximal end side of the nail anvil, and an anastomosis nail and a cutter are arranged inside the firing assembly; when the suturing and cutting device is fired, the driving assembly pushes the firing assembly to move towards the far end side direction of the suturing and cutting device, and an anastomotic nail and a cutter in the firing assembly are pushed out towards the nail anvil.

The surgical stapling and severing device may be used for tissue stapling and severing. The surgical suture cutting device is placed at a pathological change position, tissues needing to be sutured and cut are pulled into the shell through the window of the side wall, the tissues are located between the nail anvil and the firing assembly, then the firing assembly is driven by the driving assembly to move towards the far end side of the suture cutting device to clamp the tissues with the nail anvil, the suture cutting device is closed, the tissues are sutured by forming anastomotic nails in the firing assembly at the nail anvil, and meanwhile, the tissues are cut by the cutter, so that the tissue suturing and cutting are realized, the structure is simplified, the operation is simple, and the use is convenient. According to the invention, the staple anvil and the firing assembly can be closed to clamp tissues through one set of driving assembly, and the anastomosis staple can be driven to be pushed out and molded and the cutting knife can be driven to be pushed out to cut the tissues, namely, the suturing and cutting device can be closed and fired through one set of driving assembly, so that the structure is more simplified.

The structure of the surgical stapling device in accordance with various embodiments of the present invention will be described in detail below with reference to the accompanying drawings, it being understood that the various embodiments are not intended to limit the scope of the invention.

As shown in fig. 1 to 9, the present invention provides a surgical suturing and cutting device comprising: the device comprises a hollow shell 1, wherein a window 13 is formed in the side wall of the shell 1; the nail anvil 2 is fixed inside the shell 1; the firing assembly is positioned on the proximal end side of the nail anvil 2, and an anastomosis nail and a cutter 9 are arranged in the firing assembly; and when the suturing and cutting device is fired, the driving component 7 pushes the firing component to move towards the direction of the far end side of the suturing and cutting device, and the anastomosis nail and the cutter 9 in the firing component are pushed out towards the nail anvil 2. The casing 1 is tubulose or is similar to tubulose shape, and under initial condition, nail anvil 2 with the firing subassembly is located the both ends of window 13, like this, in the anastomotic process of alimentary canal tissue, the natural growth form of the device laminating tissue of suturing and cutting, window 13 is pressed close to the tissue that waits to coincide, is more easily to wait to coincide the tissue draw into be located the casing 1 lateral wall in the window 13, the tissue after the anastomosis more is close to the natural form of human tissue, can not cause discomfort such as foreign matter sense after the postoperative.

In suturing and cutting tissue using the stapling and severing device, a surgical stapling and severing device is first placed at the site of the lesion, for example, transanally inside the rectum to suture and sever the tissue in the rectum. In other embodiments, the surgical stapling and severing device may be used to staple and sever tissue at other locations in the alimentary tract, and fall within the scope of the present invention.

After the surgical stapling and cutting device is placed in place, a tool such as a forceps can be used to pull the tissue to be stapled and cut into the housing 1 through the window 13 of the side wall, so that the tissue enters between the anvil 2 and the firing assembly, then the driving assembly 7 drives the firing assembly to move towards the distal end side of the stapling and cutting device to clamp the tissue with the anvil 2, that is, the stapling and cutting device is closed, and then the driving assembly 7 can further drive staples in the firing assembly to be formed at the anvil 2 to staple the tissue, and simultaneously drive the cutting knife 9 in the firing assembly to cut the tissue. Therefore, the suturing and cutting device can be closed and fired by adopting one set of driving assembly 7, and the structure is more simplified.

In this embodiment, in the initial state, the firing assembly is located at the proximal end side of the window 13, and when the driving assembly pushes the firing assembly to move towards the distal end side of the stapling and cutting device, the firing assembly gradually approaches the anvil 2, gradually covers the window 13, and pushes out the staples and the cutting knife 9 in the firing assembly towards the anvil 2.

As shown in fig. 3 to 9, in this embodiment, the firing assembly includes a cartridge assembly 3 and a firing block 5, from a distal end side direction to a proximal end side direction of the stapling and cutting device, the anvil 2, the cartridge assembly 3, and the firing block 5 are sequentially arranged along an axial direction of the stapling and cutting device, the cartridge assembly 3 includes a cartridge 31, and the cartridge 31 is provided with the staples 33. And the distal end side of the firing block 5 is provided with a firing sheet 51 and a cutting knife 9 corresponding to the staples, the firing sheet 51 and the cutting knife 9 are at least partially positioned in the nail bin 31, the staples are positioned on the distal end side of the firing sheet, and the cutting knife 9 is positioned corresponding to the cutting knife groove 313 of the nail bin 31.

In the present invention, the distal side and the proximal side are, with respect to the operator, the end closer to the operator is the proximal side, the end farther from the operator, i.e., the end closer to the surgical site is the distal side, and the direction along the axial center of the suturing and cutting device is the axial direction, i.e., the direction from the distal side to the proximal side of the suturing and cutting device, or the direction from the proximal side to the distal side of the suturing and cutting device. In the view of fig. 1, the distal side 11 of the housing 1 is the left-hand side of the housing 1, while the fixed handle 12 of the housing 1 is located at the proximal side of the housing 1. In fig. 1, the direction S1 is from the proximal side to the distal side, and the direction S2 is from the distal side to the proximal side. In the present invention, the up-down direction is defined as the up-down direction in the view angle of fig. 1, that is, the D1 direction is the upward direction in fig. 1. In the perspective of fig. 14, the distal end side 41 of the guide rail 4 is the left end side thereof, and the proximal end side 42 of the guide rail 4 is the right end side thereof. In the present invention, the inner side and the outer side of a member are relative to the axial center of the member, and the side closer to the axial center is the inner side and the side farther from the axial center is the outer side.

In this embodiment, as shown in fig. 1 and 2, the proximal side of the housing 1 is provided with a fixed handle 12, the driving assembly 7 comprises a driving handle 71, the driving handle 71 is rotatably connected to the fixed handle 12 of the housing 1, and when the driving handle 71 moves in the first direction, the driving handle 71 pushes the firing block 5 to move towards the distal side direction of the stapling device. As shown in fig. 2, the driving handle 71 includes a firing engagement portion 711, a pivoting portion 712 and a holding portion 713, which are arranged in this order, the pivoting portion 712 is rotatably connected to the fixed handle 12, and the firing engagement portion 711 is rotatably connected to the proximal end side of the firing block 5. In this embodiment, the fixed handle 12 is at an angle to the axial direction of the slitting device, which facilitates the operator to hold the device, and does not obstruct the proximal opening 15 of the housing 1, so that the operator can more easily observe the inside of the housing 1 from the proximal opening 15. In other alternative embodiments, the fixing handle 12 may also be extended along the axial direction of the stitching device, or may adopt other shapes and/or other connection modes with the housing 1, and all fall within the protection scope of the present invention.

In this embodiment, as shown in fig. 2, the stapling and severing device further comprises a transmission piece 6, both ends of the transmission piece 6 being rotatably connected to the proximal side of the firing block 5 and the firing engagement 711 of the drive handle 71, respectively. As shown in FIG. 1, the anvil 2 and the firing assembly are disposed close to the inner sidewall of the housing 1 to increase the view and the operation space inside the housing 1, and the firing assembly and the pivot portion 712 are located on both sides of the centerline of the housing 1 to obtain higher transmission efficiency of the firing force. In this embodiment, the firing assembly is located on the upper side of the centerline of the housing 1 and the pivot 712 is located on the lower side of the centerline of the housing 1. In another alternative embodiment, it is also possible that the firing assembly is located at the lower side of the centerline of the housing 1, the pivot portion 712 is located at the upper side of the centerline of the housing 1, and the like, and all of them fall within the protection scope of the present invention. As shown in fig. 8, a first pivot shaft 54 is disposed on the proximal side of the firing block 5, one end of the transmission member 6 is sleeved on the first pivot shaft 54 through an opening, and the transmission member 6 can rotate around the first pivot shaft 54. As shown in fig. 2, the firing engagement portion 711 is provided with a second pivot shaft 7111, the other end of the transmission member 6 is sleeved on the second pivot shaft 7111 through an opening, and the transmission member 6 can rotate around the second pivot shaft 7111.

As shown in fig. 1 and 2, the driving assembly 7 further includes a second elastic member 73, the second elastic member 73 is elastically deformed during the firing process of the slit device, and when the operator releases the driving handle 71 after the firing process of the slit device is completed, the driving handle 71 can automatically rebound to the initial position under the elastic deformation restoring force of the second elastic member 73, so as to reset the slit device. Specifically, the proximal end side of the housing 1 is provided with a fixed handle 12, and the second elastic member 73 is an elastic sheet having elasticity at least partially, and may be a metal sheet, a plastic sheet, a rubber sheet, or the like. The second elastic member 73 is disposed between the holding portion 713 of the driving handle 71 and the fixed handle 12, and specifically, a first end 731 and a second end 732 of the second elastic member 73 respectively abut against the fixed handle 12 and the holding portion 713 of the driving handle 71. In other alternative embodiments, the second elastic element 73 may also be disposed between the fixed handle 12 and the firing matching part 711 of the driving handle 71, or between the sidewall of the housing 1 and the firing matching part 711 or the holding part 713 of the driving handle 71, which are within the protection scope of the present invention. In other alternative embodiments, the second elastic member 73 may also adopt an elastic structure such as a compression spring, a tension spring, a torsion spring, and the like.

The structure of the driving handle 71 fitted to the housing 1 in this embodiment is shown in fig. 2. Specifically, the side wall of the fixed handle 12 is provided with a first through hole 122, the pivot portion 712 of the driving handle 71 is provided with a second through hole 7121, the driving assembly 7 further includes a connecting pin 72, the connecting pin 72 is inserted into the first through hole 122 and the pivot portion 712, and the pivot portion 712 can rotate around the connecting pin 72. As shown in fig. 1 and fig. 2, an elastic member stopper portion 7131 is disposed on the driving handle 71, the elastic member stopper portion 7131 extends along the length direction of the driving handle 71, and the second end 732 of the second elastic member 73 abuts against the elastic member stopper portion 7131 and can move along the extending direction of the elastic member stopper portion 7131.

As shown in fig. 2, the second end 732 of the second elastic member 73 has a tilted portion, which may be tilted upward or downward compared to the main body portion of the second elastic member 73, the tilted portion abuts against the side of the elastic member stop portion 7131 of the driving handle 71 facing the fixed handle 12, and the tilted portion of the second end 732 may have another structural shape, such as an arc surface, so as to reduce the friction force between the second end 732 and the elastic member stop portion 7131. Further, a through groove 733 is formed at the second end 732 of the second elastic member 73, and the through groove 733 extends along the length direction of the second elastic member 73. Through the through groove 733, the second elastic member 73 is more easily elastically deformed at a side close to the driving handle 71, and an operator can more conveniently compress the second elastic member 73 to deform when holding the driving handle 71.

As shown in FIG. 2, a proximal opening 15 is opened at the proximal side of the housing 1, and the firing assembly enters the interior of the housing 1 through the proximal opening 15 and operates on the tissue to be anastomosed using a surgical tool such as a forceps. The operator can also see the inside of the slitting device through the proximal opening 15. In this embodiment, the anvil 2 and the cartridge component 3 are both located above the inside of the housing 1, the window 13 is opened on the upper surface of the housing 1, and the position of the window 13 corresponds to the position of the anvil 2, so that the tissue to be sutured is conveniently pulled into between the anvil 2 and the cartridge component 3 through the window 13. In other alternative embodiments, the window 13 may be disposed at other positions on the side wall of the housing 1, and is not limited to the position shown in fig. 2.

As shown in fig. 2, in this embodiment, a distal opening 111 is formed in a distal side surface of the housing 1, the distal opening 111 prevents a sealed space from being formed between the distal end of the suturing and cutting device and a tissue cavity when the suturing and cutting device is placed into a tissue, so as to prevent an influence caused by normally secreted gas or liquid and contents in the digestive tract, and in addition, since the anvil 2 and the cartridge assembly 3 are both disposed close to the inner upper surface of the housing 1, and the anvil 2 and the cartridge assembly 3 are both wall-shaped structures with small space occupation, an operator can observe the inside of the housing 1 more conveniently, and a larger operation space is provided. In this embodiment, the distal opening 111 is located in the middle of the distal surface of the housing 1, i.e., the distal opening 111 is aligned with the axis of the suturing and cutting device and is a circular opening. In other alternative embodiments, the distal opening 111 may be opened at other positions, and may have other shapes, for example, the distal opening 111 is at least two circular or oval openings disposed on the distal sidewall and penetrating through the distal sidewall, and all of them fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the distal surface of the housing 1 may be an arc-shaped surface for guiding, that is, the distal diameter of the housing 1 is smaller than the diameter of the main body portion thereof, so that the distal side thereof forms an approximately conical guide portion, which may more conveniently guide the housing 1 to be inserted into the inside of the rectum through the anus, or guide the housing 1 to more easily enter other lesion sites of the digestive tract, while protecting the mucosal layer from being damaged.

As shown in fig. 3 to 5, the distal end side of the staple cartridge 31 is a staple cartridge surface 312, a cutter groove 313 and a plurality of staple holes 3121 are provided in the staple cartridge surface 312, the staple holes 3121 may be arranged in one row or a plurality of rows, and when the staple holes 3121 are at least two rows, the staple holes 3121 in the inner ring may be staggered with the staple holes 3121 in the outer ring, which are projected in the diameter direction. Fig. 5 shows the positional relationship of the knife 9 and the cartridge 31 in the initial state, in which the firing block 5 is omitted. Fig. 6 shows the structure of the firing block 5 cooperating with the cutting knife 9, wherein the cutting knife 9 is omitted. The cutter 9 is fixedly arranged in a containing groove 59 on the far end side of the firing block 5, and the bottom surface of the containing groove 59 is a push knife surface 58 matched with the cutter 9. The distal end side of the firing block 5 is provided with a firing sheet 51 and a cutting knife 9, and the firing sheet 51 corresponds to the position of the nail hole 3121 and is used for pushing out the anastomotic nails through the nail hole 3121 when the stapling and cutting device is fired. The rake face 58 is located on the proximal side 92 of the cutter 9. When the firing block 5 moves towards the direction of the far end side, the cutting knife 9 is driven to move towards the direction of the far end side synchronously. As shown in fig. 7, the staples 33 include fixed ends 331 and pointed ends 332, and the fixed ends 331 of the staples 33 are fixed to the inside of the cartridge 31. When the suturing and cutting device is fired, the firing sheet 51 of the firing block 5 pushes the sharp pointed end 332 of the anastomotic nail 33 to penetrate through the nail hole 3121, the tissue is penetrated and reaches the nail anvil 2, the nail anvil surface 22 of the nail anvil 2 is formed, and the fixed end 311 is separated from the nail bin 31 and fixed on the tissue, so that the tissue is anastomosed. The shape and configuration of the staples in fig. 7 are exemplary only, and in other alternative embodiments, the staples may take on other shapes and configurations without departing from the scope of the present invention. For example, in another alternative embodiment, the staples are "B" shaped staples, and the staples include two legs capable of piercing tissue, and when the staples are formed on the anvil, the two legs of the staples are pressed against the staple slots of the anvil to be bent and deformed, so that the staples are formed into the "B" like shape. The nail anvil 2 is further provided with a cutting matching part, the cutting matching part corresponds to the cutter groove 313 in position, and when the sewing and cutting device is triggered, the cutting matching part is matched with the cutter 9, so that the cutting effect of the cutter 9 on tissues can be improved. The cutting engagement portion may be a knife anvil or a groove extending distally of the anvil 2. Specifically, the knife anvil may adopt a rigid plastic sheet or a silicon sheet fixed at a corresponding position on the nail anvil 2, which is disclosed in the prior art.

In this embodiment, as shown in fig. 4, the cutter groove 313 is a linear groove or an arc groove, the nail holes 3121 are located on the same side of the cutter groove 313, and the nail holes are located close to the inner wall of the housing with respect to the cutter groove. And the cutting knife 9 is positioned at the inner side far away from the side wall of the shell 1, and the nail holes 3121 are all positioned at the outer side near the side wall of the shell 1.

The firing process of the surgical stapling and severing device is described in detail below with reference to FIGS. 1-17. Fig. 1-9 are schematic views of the surgical stapling and severing device of this embodiment in an initial state (i.e., unfired). As shown in FIGS. 10-16, the surgical stapling and severing device of this embodiment is shown in a schematic view during firing. Fig. 17 is a schematic view showing the surgical stapling and severing device of this embodiment being reset after firing.

In this embodiment, in different states, the staple cartridge 31 has a first position and a second position, the second position being located on a distal side of the first position. In the initial state, the staple cartridge 31 is located at the first position, which is located at the proximal side of the window 13, in this case, the staple cartridge 31 may be located completely at the proximal side of the window 13, i.e. not overlapping with the window 13, or the staple cartridge 31 may be located partially at the proximal side of the window 13, i.e. partially overlapping with the window 13, but located entirely at the opposite proximal side of the window 13. When the nail bin 31 moves from the first position to the second position, the nail bin 31 gradually covers the window 13. The firing block 5 has a third position, a fourth position distal to the third position, and a fifth position distal to the fourth position.

As shown in FIGS. 1-3, in the initial state, the driving handle 71 is not held, the staple cartridge 31 is in the initial first position, and the firing block 5 is in the initial third position. As shown in fig. 4 to 9, in this state, the firing plate 51 does not push the staples in the magazine 31 to move in the distal direction, the staples do not protrude from the magazine surface 312, the firing block 5 does not drive the cutting knife 9 to move in the distal direction, and the distal end 91 of the cutting knife 9 is located inside the cutting knife groove 313, does not protrude from the magazine surface 312, and does not cut tissue. In the initial position, the second elastic member 73 ensures that the driving assembly stably stays at one position, and cannot be accidentally triggered by external force.

As seen in fig. 10 and 11, when the drive handle 71 is held in a first direction (i.e., S3 direction in fig. 10), the drive handle 71 rotates in the first direction, and the firing engagement portion 711 pushes the firing block 5 in a distal direction (i.e., S1 direction in fig. 10), so that the firing block 5 moves from the third position to the fourth position, i.e., to the position shown in fig. 12, during the movement of the firing block 5 from the third position to the fourth position, the firing block 5 and the staple cartridge 31 are interlocked, and the staple cartridge 31 simultaneously moves to a distal direction under the pushing action of the firing block 5 to a second position, i.e., a surgical position where the anvil 2 and the staple cartridge 31 clamp tissue, i.e., the stapling device is closed. At this time, the second elastic member 73 is compressed by the driving handle 71 to be compressed and deformed. At this time, although the distal end 91 of the cutting knife 9 moves a certain distance in the distal direction with the firing block 5, it is still located inside the knife channel 313, and the relative position of the cutting knife and the staple cartridge 31 is not changed, and the cutting knife does not protrude from the staple cartridge surface 312, and thus the tissue is not cut.

When the firing block 5 is at the fourth position, the driving handle 71 is continuously held in the first direction, and the driving handle 71 drives the firing block 5 to continuously move to the fifth position in the distal direction, i.e. the position of the firing block 5 shown in fig. 13, at which time the firing block 5 moves a certain distance to the distal side again. In the process that the firing block 5 moves from the fourth position to the fifth position, the firing block 5 is not linked with the nail bin 31, and the position of the nail bin 31 is kept unchanged at the second position. As shown in fig. 15 and 16, the distal end side of the firing block 5 continues to enter the inside of the staple cartridge 31, so that the distal end side of the firing block 3 can push out the staples inside the staple cartridge 31 toward the anvil 2, and drive the cutting knife 9 to move toward the anvil 2, pass through the cutting knife groove 313 and reach the cutting matching portion of the anvil 2, and implement the firing of the stapling and cutting device. Thus, the present invention provides for closure and firing of the stapling and severing device by a single actuation handle 71. At this time, the second elastic member 73 is further compressed by the driving handle 71 to be more compressed and deformed.

In this embodiment, as shown in fig. 14, the surgical stapling device further comprises a guide rail 4 extending along the axial direction of the stapling device, and the anvil 2, the cartridge assembly 3 and the firing block 5 are sequentially sleeved on the guide rail 4 from the distal side to the proximal side of the stapling device. The guide rail 4 can guide and limit the axial movement of the cartridge module 3 and the firing block 5, and keep the cartridge module 3 and the anvil 2 aligned in the axial direction, so as to ensure that the staples in the cartridge module 3 can be formed at the corresponding positions on the anvil surface 22 of the anvil 2 after being pushed out. The distal side 41 of the guide rail 4 may be fixed inside the housing 1 and the anvil 2 fixed inside the housing 1, so as to maintain the positional stability of the guide rail 4 and the anvil 2 with respect to the housing 1, but the invention is not limited thereto.

In this embodiment, as shown in fig. 14, the surgical stapling and cutting device comprises two guide rails 4, and two sides of the anvil 2, the staple cartridge 31 and the firing block 5 are respectively sleeved on the guide rails 4. In other alternative embodiments, the number of the guide rails 4 is not limited to two, and may be one or more, all of which are within the protection scope of the present invention. The two sides of the nail anvil 2 are respectively provided with a nail anvil guide part 21 which is sleeved on the two guide rails 4, and a nail anvil surface 22 is arranged between the two nail anvil guide parts 21. As shown in fig. 14, the magazine 31 includes two magazine guiding portions 311 respectively sleeved on the two guide rails 4, and the magazine surface 312 is disposed between the two magazine guiding portions 311. The two sides of the trigger block 5 are respectively provided with trigger guide parts 52 which are respectively sleeved on the two guide rails 4.

As shown in fig. 17, after the suture cutting device is fired, the operator releases the driving handle 71, i.e., the holding force of the driving handle 71 is removed, and then the driving handle 71 rotates in the second direction (i.e., the direction of S4 in fig. 17) from the firing position under the action of the elastic deformation restoring force of the second elastic element 73, and rebounds to the initial position, so that the suture cutting device is reset, wherein the second direction is opposite to the first direction. Further, since the driving handle 71 is rotatably connected to the firing assembly, when the driving handle 71 rotates in the second direction, the entire firing assembly is driven to move towards the proximal direction of the stapling device, so as to return the staple cartridge 31 to the first position.

In this embodiment, as shown in fig. 5 to 9 and 14 to 16, the firing assembly further includes a first elastic member 32, and two ends of the first elastic member 32 respectively abut against the staple cartridge 31 and the firing block 5. The first elastic member 32 is located inside the staple cartridge 31, a distal end side of the first elastic member 32 abuts against an inner side of a distal end side of the staple cartridge 31, and a proximal end side of the first elastic member 32 abuts against a distal end side of the firing block 5.

As shown in fig. 5 to 9 and 14 to 16, in this embodiment, the first elastic member 32 includes two compression springs, and the two compression springs are respectively disposed in the two magazine guide portions 311 of the magazine 31 and respectively sleeved on the two guide rails 4. The first elastic piece 32 is arranged between the distal end side surface of the firing guide part 52 of the firing block 5 and the distal end side surface of the nail box 31.

In an initial state (i.e., the state of fig. 3 and 9), the staple cartridge 31 is in the first position, the firing block 5 is in the third position, and at this time, the first elastic member 32 may be in an uncompressed state, or may be in a state with a certain initial compression amount, at this time, the driving handle 71 is held, the pushing force of the driving handle 71 to the firing block 5 is not enough to overcome the force resisting the deformation of the first elastic member 32, so that the staple cartridge 31 and the firing block 5 are linked through the first elastic member 32, the firing block 5 pushes the staple cartridge 31 to move towards the anvil 2 side synchronously, the firing block 5 moves to the fourth position, and the staple cartridge 31 moves to the second position (i.e., the state of fig. 12). At this time, since the staple cartridge 31 and the anvil 2 clamp tissue together, when the driving handle 71 is continuously held, the tissue may receive resistance to the continuous distal movement of the staple cartridge 31, so that the holding force of the driving handle 71 needs to be increased, the pushing force of the driving handle 71 to the firing block 5 is increased to overcome the force resisting the deformation of the first elastic member 32, and the first elastic member 32 is compressed to deform, at this time, the staple cartridge 31 does not move in the distal direction any more, and the firing block 5 continues to move distally to the fifth position (i.e., the state of fig. 13 and 16). The firing sheet 51 is in contact with the staples in the staple cartridge 31 and pushes the staples out towards the nail anvil 2, and the firing block 5 drives the cutter 9 to move towards the nail anvil 2, so that the suturing and cutting device is fired.

Preferably, in the initial state, the first elastic member 32 is in a state with a certain initial compression amount, which can better define the initial position of the firing block 5 and the staple cartridge 31, and when the staple cartridge 31 moves from the first position to the second position, the firing block 5 and the staple cartridge 31 are better matched. As shown in fig. 9, in the initial state, when the staple cartridge 31 is located at the first position, the firing block 5 is at least partially located inside the staple cartridge 31, the firing plate 51 and the cutting knife 9 are both located inside the staple cartridge 31, and the first elastic member 32 has an initial compression amount. As can be seen in fig. 12, 13 and 16, when the staple cartridge 31 moves to the second position and the driving handle 71 continues to push the firing block 5 toward the distal direction of the stapling device, the firing block 5 can compress the first elastic member 32 so that the firing block 5 continues to enter the interior of the staple cartridge 31.

After the suturing and cutting device is fired, when the driving handle 71 is rotationally reset in the second direction under the action of the first elastic element 73, the driving handle 71 drives the cartridge module 3 to move back to the first position of the initial state in the proximal direction of the suturing and cutting device. Meanwhile, when the driving handle 71 is rotationally reset in the second direction, the second elastic member 32 is no longer pushed in the distal direction, and pushes the firing plate 51 in the proximal direction under the action of its own elastic restoring force, so that the firing block 5 is retracted to the third position inside the magazine 31 in the initial state relative to the magazine 31 under the action of the second elastic member 32. In different embodiments, the second elastic element 32 may be a spring, a metal elastic sheet, or a flexible material block that can be compressed after an external force is applied, such as a rubber block, a silicone block, and the like, and all of them fall within the protection scope of the present invention.

In another alternative embodiment, instead of providing the first elastic member 32, a friction damping mechanism may be provided between the outer wall of the distal end side of the firing block 5 and the inner wall of the proximal end side of the staple cartridge 31 (for example, a friction damping layer of rubber particles is provided on the inner wall of the proximal end side of the staple cartridge 31 or the outer wall of the distal end side of the firing block 5), in an initial state, the driving handle 71 is held, the pushing force of the driving handle 71 to the firing block 5 is not enough to overcome the friction force of the friction damping mechanism, so that the staple cartridge 31 and the firing block 5 are linked by the friction damping mechanism, the firing block 5 pushes the staple cartridge 31 to move towards the side of the anvil 2 synchronously, the firing block 5 moves to the fourth position, and the staple cartridge 31 moves to the second position (i.e., the state of fig. 12). At this time, since the staple cartridge 31 and the anvil 2 clamp the tissue together, when the driving handle 71 is continuously held, the tissue may receive the resistance to the continuous distal movement of the staple cartridge 31, so that the holding force of the driving handle 71 needs to be increased, the pushing force of the driving handle 71 to the firing block 5 is increased to overcome the friction force of the friction damping mechanism, at this time, the staple cartridge 31 does not move in the distal direction under the reaction force of the tissue, and the firing block 5 continues to move in the distal direction to the fifth position (i.e., the state of fig. 13). Therefore, the firing plate 51 contacts with the staples in the staple cartridge 31 and pushes the staples out towards the anvil 2, and the firing block 5 drives the cutting knife 9 to move towards the anvil 2, so as to fire the stapling and cutting device.

The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A surgical stapling and cutting device, comprising:

the side wall of the shell is provided with a window;

the nail anvil is fixed inside the shell;

the firing assembly is positioned on the proximal end side of the nail anvil, and anastomotic nails and a cutter are arranged inside the firing assembly;

2. The surgical stapling device of claim 1 wherein in an initial state, said firing assembly is positioned on a proximal side of said window, and wherein as said drive assembly advances said firing assembly in a direction toward a distal side of said stapling device, said firing assembly progressively covers said window and pushes staples and a knife in said firing assembly out toward said anvil.

3. The surgical stapling device of claim 1 wherein said firing assembly comprises a staple cartridge and a firing block, said staple cartridge and said firing block being sequentially arranged along an axial direction of said stapling device from a distal end to a proximal end, said staple cartridge having said staples disposed therein and said firing block having said knife disposed thereon.

4. The surgical stapling device of claim 3 wherein the distal side of the staple cartridge is provided with a cutter slot and a staple hole, the distal side of the firing block is provided with a firing tab corresponding to the location of the staple hole, and the cutting knife corresponds to the location of the cutter slot.

5. The surgical stapling and severing device of claim 4 wherein said cutter slot is a linear or arcuate slot, said staple holes all being located on the same side of said cutter slot.

6. The surgical stapling device of claim 4 wherein said anvil is further provided with a cutting engagement portion corresponding to the position of said cutter channel.

7. The surgical stapling device of claim 6 wherein the cutting engagement portion is a knife anvil or a distally extending recess in the anvil.

8. The surgical stapling device of claim 3 wherein said staple cartridge has a first position and a second position, said staple cartridge being in said first position in an initial state, said driving assembly urging said staple cartridge to move in a distal direction of said stapling device to said second position by said firing block upon firing of said stapling device;

when the nail bin is located at the second position, the driving assembly pushes the firing block to move towards the direction of the far end side of the stitching device, and the firing block pushes out the anastomotic nails and the cutting knife in the nail bin towards the nail anvil.

9. The surgical stapling device of claim 8, wherein said firing assembly further comprises a resilient member having two ends that respectively abut said staple cartridge and said firing block.

10. The surgical stapling device of claim 9 wherein said resilient member is located within said staple cartridge, a distal side of said resilient member abutting a distal side of said staple cartridge and a proximal side of said resilient member abutting a distal side of said firing block;

11. The surgical stapling device of claim 1 wherein said drive assembly includes a drive handle rotatably connected to said housing, said drive handle urging said firing assembly to move in a distal direction of said stapling device when said drive handle is moved in a first direction.

12. The surgical stapling device of claim 11 wherein said drive handle comprises a firing engagement, a pivot, and a grip arranged in series, said pivot rotatably connected to said housing, said firing engagement rotatably connected to said firing assembly.

13. The surgical stapling device of claim 12 wherein said anvil and said firing assembly are disposed proximate an interior sidewall of said housing, said firing assembly and said pivot being disposed on opposite sides of a centerline of said housing.

14. The surgical stapling device of claim 12 wherein the proximal side of the housing is further provided with a fixed handle, the pivot of the actuating handle being rotatably connected with the fixed handle by a connecting pin.

15. The surgical stapling device of claim 12 wherein said drive assembly further comprises a second resilient member, said first resilient member being resiliently deformed when said drive handle is rotated in a first direction by an external force, said drive handle urging said firing assembly in a direction toward a distal end of said stapling device to fire said stapling device, said drive handle being rotated in a second direction by a restoring force of said resilient member when said external force is removed.

16. The surgical stapling device of claim 15 wherein said second resilient member is located between said firing engagement portion and said housing or between said gripping portion and said housing; the second elastic piece is an elastic sheet, a pressure spring or a tension spring with elasticity at least partially.

17. The surgical stapling device of claim 3 further comprising a guide rail extending in an axial direction of said stapling device, said anvil, said staple cartridge and said firing block being sequentially nested on said guide rail.

18. The surgical stapling device of claim 17, comprising two said rails, said rails being sleeved on either side of said anvil, said staple cartridge and said firing block, respectively, in a distal to proximal direction;

19. The surgical stapling device of claim 1 wherein a proximal side of said housing defines a proximal opening, said firing assembly at least partially passing into an interior of said housing from said proximal opening, said drive assembly being coupled to a proximal side of said firing assembly.

20. The surgical stapling device of claim 1 wherein the distal side surface of said housing is an arcuate surface for guidance, the distal side of said arcuate surface being open distally.