CN116138828A

CN116138828A - Surgical cutting anastomat

Info

Publication number: CN116138828A
Application number: CN202310305127.3A
Authority: CN
Inventors: 陆坚
Original assignee: Suzhou Frankenman Medical Equipment Co Ltd
Current assignee: Suzhou Frankenman Medical Equipment Co Ltd
Priority date: 2017-02-27
Filing date: 2017-02-27
Publication date: 2023-05-23
Also published as: CN106667537B; CN106667537A

Abstract

The invention discloses a surgical cutting anastomat, wherein a staple and a knife pad are positioned on the same side of cut tissues and can be replaced integrally, so that the replacement operation of components is simplified. The surgical cutting stapler comprises a staple cartridge assembly, a cutter, a reversing transmission mechanism and a driving mechanism, wherein the staple cartridge assembly comprises a staple cartridge shell, staples positioned in the staple cartridge shell, a staple pushing piece which is arranged in the staple cartridge shell in a front-back sliding mode and used for pushing the staples out of the staple cartridge shell, the cutter is arranged in the staple cartridge shell in a front-back sliding mode, the cutter is arranged on a front frame in the front-back sliding mode, a cutting part positioned in front of the cutter is formed in the front of the cutter, the reversing transmission mechanism is used for driving the cutter to move from front to back, the driving mechanism is connected between the actuating head and the handle assembly, and the reversing transmission mechanism is connected between the driving mechanism and the rear part of the cutter.

Description

Surgical cutting anastomat

The present application is a divisional application of patent application of the invention with application number 201710107202X filed on 27 days 2.2017.

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a surgical cutting anastomat.

Background

The traditional straight head and arc transverse cutting anastomat is mainly used for reconstructing the digestive tract with difficult surgical field exposure and closing the anastomotic stoma and stump or incision in the visceral organ resection operation. At present, the universal use process of the transverse cutting anastomat is as follows: after the locking handle positions and locks the tissue, the percussion handle is pushed, the cutter hidden in the nail bin assembly is pushed by the central rod driven by the percussion handle, the other side of the tissue to be cut is provided with a nail supporting seat and a cutter pad for providing a tissue cutting platform, and the whole cutting process of the driven straight cutter is used for cutting off the cutter pad to represent that the cutting task is completed. The cut-off knife pad is generally not reusable.

Often, the operation of the same patient cannot be completed through one lancing, multiple lancing is required, and if the instrument is replaced for each lancing, the treatment cost of the patient is increased, so that the instrument capable of providing the replacement component is generally required, and the cost can be reduced under the condition that the health of the patient is not affected. The existing equipment for replacing the components is usually a nail supporting seat, a knife pad and a nail bin component to be replaced together, the multi-component replacement is quite difficult to operate, the components are not fixed into a whole, component replacement personnel are required to mobilize the positions of the components, the degree of freedom among the components is quite high, misoperation is quite easy to occur, people without training cannot replace the components at all, the trained people are very hard to replace the components, and the labor and the operation time of doctors are wasted in the component replacement process.

As disclosed in chinese patent CN101966093B, a laparoscopic surgical cutting stapler with a replaceable cartridge assembly is disclosed, the actuating head of the stapler is composed of an actuating frame, a slide bar, a cartridge assembly and a anvil assembly, a staple slot, a staple pushing hole, a slide plate slot and a push knife slot are formed in the cartridge housing, a staple forming slot corresponding to the staple position in the cartridge assembly and a cutting slot corresponding to the push knife slot position in the cartridge housing are formed on the end face of the anvil assembly, a cutter knife is mounted in the push knife slot of the cartridge housing, an arc-shaped slide slot is formed at the proximal end of the cartridge housing, when the cartridge assembly is in use, the slide bar moves from the proximal end to the distal end of the cartridge assembly, and the push knife slide pushes the push block to push staples out of the staple slots when the push knife block is pushed to move in the staple pushing hole by means of the inclined plane thereof. Although the staple cartridge assembly is convenient to replace, after one-time stitching, the staple cartridge assembly and the staple anvil assembly with the knife pad are required to be replaced respectively, so that the use is inconvenient.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide a surgical cutting stapler in which staples and knife pads are positioned on the same side of the severed tissue and can be replaced integrally, thereby simplifying assembly replacement operations.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a surgical cutting anastomat comprises an actuating head at the front end and a handle component at the rear end, wherein the actuating head comprises a front frame, a nail anvil component arranged on the front frame and a nail bin component detachably arranged on the front frame, the nail bin component is positioned behind the nail anvil component and comprises a nail bin shell, a nail arranged in the nail bin shell, a nail pushing piece which can slide back and forth and is arranged in the nail bin shell and is used for pushing the nail out of the nail bin shell, the nail anvil component comprises a nail propping seat fixedly arranged on the front frame, a nail forming groove corresponding to the nail is formed on the end face of the nail propping seat, the nail bin component further comprises a cutter pad arranged in the nail bin shell, the nail bin component further comprises a cutter blade which can slide back and forth and is arranged on the front frame, the front part of the nail bin component is provided with a cutting part positioned in front of the cutter pad, the actuating head also comprises a reversing transmission mechanism for driving the cutter to move from front to back, the surgical cutting anastomat also comprises a driving mechanism for driving the nail pushing piece to move from back to front, the driving mechanism is connected between the actuating head and the handle assembly, the reversing transmission mechanism comprises a gear or a gear set which can be driven to rotate by the driving mechanism, the rear part of the cutter is provided with a first rack part, the first rack part is provided with a plurality of teeth which are sequentially arranged along the front direction, the driving mechanism is provided with a second rack part, the second rack part is provided with a plurality of teeth which are sequentially arranged along the front and back direction, the first rack part and the second rack part are respectively positioned at two opposite sides of the gear or the gear set, the surgical cutting anastomat has a cutting state, the first and second rack portions are respectively engaged with opposite sides of the gear or gear set.

More preferably, the drive mechanism includes a center rod slidable in the front-rear direction, a front portion of the center rod having the second rack portion.

Further, the driving mechanism further comprises a push rod which can slide along the front-back direction and is used for pushing the nail pushing piece forwards, and a transmission component which is connected between the push rod and the center rod and enables the push rod to slide along the center rod, the surgical cutting anastomat further comprises a nail striking state, when the surgical cutting anastomat is in the nail striking state, the second rack part is separated from the gear or the gear group, and the staples are pushed out of the nail cartridge shell by the nail pushing piece.

Still further, the transmission assembly includes a first chute formed on the center rod and extending in a front-rear direction, a first shaft slidably disposed in the first chute, a first hinge rod having a front end portion rotatably connected to a rear end portion of the leg rod via the first shaft, a second chute formed on the center rod and extending obliquely in a vertical direction, a second shaft slidably disposed in the second chute, a third chute having a front end portion rotatably connected to a rear end portion of the first hinge rod via the second shaft, and a third shaft slidably disposed in the third chute, the rear end portion of the second hinge rod being rotatably connected to the rear housing via the third shaft.

Still further, the surgical cutting stapler has an initial state in which the second rack portion of the center rod is located a distance behind the forward end portion of the push rod.

Preferably, the central rod is configured to engage with the gear or gear set after being pushed forward to a certain position.

Further, the driving mechanism further comprises a rear shell, a firing handle rotatably arranged on the rear shell, and a firing piece connected with the firing handle and capable of rotating along with the firing handle, wherein the firing piece is provided with a position which is abutted with the rear end of the center rod to push the center rod to slide forwards.

More preferably, the reversing gear further comprises a torsion spring for resetting the gear or gear set.

Preferably, the nail pushing piece comprises a plurality of rows of nail pushing needles respectively arranged at the left side and the right side of the knife pad.

Preferably, the front frame is provided with a positioning pin, the cutter is provided with a long groove extending along the front-rear direction, and the positioning pin can be inserted into the long groove in a sliding manner along the front-rear direction.

By adopting the technical scheme, the invention has the following advantages compared with the prior art:

the knife pad and the nail bin assembly are positioned on the same side of the cut tissue, so that the nail bin assembly which is integrated with the staples and the knife pad and is only replaced and fixed when the assembly is replaced, the replacement of the staples and the knife pad can be realized through simple operation, the replacement of the instrument is simple and convenient, and the replacement operation of the assembly is simplified. The cutter pad and the nail bin assembly are separated and respectively positioned at the two sides of the tissue to be cut in the prior art, so that various difficulties such as multiple positioning positions during assembly replacement, instability of the assembly to be replaced and the like are eliminated, the use experience of the assembly to be replaced is improved, and the error probability during assembly replacement is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a surgical cutting stapler of the present invention in an initial state;

FIG. 2 is a schematic view of a staple cartridge assembly of the present invention;

FIG. 3 is a schematic view of a cutting knife according to the present invention;

FIG. 4 is a schematic view of the actuator head of FIG. 1 in a stapling condition;

FIG. 5 is a schematic illustration of the actuator head of FIG. 4 with the left side abutment omitted;

FIG. 6 is a schematic view of the actuator head of FIG. 1 in a cut state;

fig. 7 is a schematic view of the actuator head of fig. 6 with the left side abutment omitted.

In the above-mentioned figures of the drawing,

1. a execution head; 2. a handle assembly; 3. a driving mechanism;

11. a front frame; 110. a positioning pin; 12. an anvil assembly; 13. a staple cartridge assembly; 14. a gear; 15. a torsion spring;

121. a nail supporting seat; 122. a cutter; 1220. a cutting section; 1221. a first rack portion; 1222. a long groove;

131. a cartridge housing; 132. a nail pushing piece; 133. a knife pad;

30. a rear case; 31. a central rod; 310. a second rack portion; 32. a push rod; 33. a firing handle; 34. a firing member; 3a, a first chute; 3b, a first shaft; 3c, a first hinging rod; 3d, a second chute; 3e, second axis; 3f, a second hinging rod; 3g, a third chute; 3h, a third axis.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

The terms front, rear, etc. used in the present invention are defined according to the conventional viewing angle of those skilled in the art and are for convenience of description, and are not limited to specific directions. For example, the front and rear correspond to the left and right sides of the page in fig. 1, respectively.

As shown in fig. 1 to 7, a surgical cutting stapler includes an actuating head 1 at a front end, a handle assembly 2 at a rear end, and a driving mechanism 3 for connecting the actuating head 1 and the handle assembly 2.

The head 1 includes a front frame 11, an anvil assembly 12 provided on the front frame 11, and a cartridge assembly 13 provided on the front frame 11. The nail bin assembly 13 is detachably arranged with the front frame 11, the front frame 11 is provided with a containing groove matched with the nail bin assembly 13, and the nail bin assembly 13 can be inserted into the containing groove in a front-back sliding manner so as to be sewn and can be detached and replaced after one-time sewing.

The cartridge assembly 13 includes a cartridge housing 131 having a cavity therein, a plurality of staples disposed in the cartridge housing 131 for stapling tissue, a plurality of staple slots formed in the cartridge housing 131 for the staples to be ejected, and a staple pushing member 132 slidably disposed in the cartridge housing 131 in the front-rear direction for pushing the staples out of the staple slots. The nail bin assembly 13 further comprises a cutter pad 133 which is arranged in the nail bin shell 131 and can be matched with the cutter, the cutter pad 133 is specifically arranged on the nail pushing piece 132, the nail pushing piece 132 is provided with a plurality of rows of nail pushing needles, and at least one row of nail pushing needles are correspondingly arranged on the left side and the right side of the cutter pad 133 respectively.

The anvil assembly 12 includes a staple holder 121 capable of being engaged with staples, and a staple forming groove corresponding to the staples is formed on a rear end surface of the staple holder 121. After the staples are pushed out of the cartridge housing 131 and through the tissue, the staples are contacted with the staple holder 121 to be bent and formed by the staple forming grooves. The cartridge assembly 13 is positioned behind the anvil assembly 12 and is positioned opposite and spaced apart from each other. The anvil assembly 2 further includes a cutter 122 slidably provided in the front frame 11 forward and backward, and a cutting portion 1220 located in front of the cutter pad 133 is formed at the front portion of the cutter 122. Corresponding to the nail pushing piece 132, at least one nail supporting seat 121 is respectively arranged on the left side and the right side of the cutter 122. Specifically, the front frame 11 is provided with a positioning pin 110, the cutter 122 is provided with a long groove 1222 extending in the front-rear direction, and the positioning pin 110 is slidably inserted into the long groove 1222 in the front-rear direction. The plurality 1222 of elongated slots are provided at different positions of the cutter 122.

The driving mechanism 3 is used for driving the staple pushing member 132 to move from back to front so as to push out the staples for stitching. The executing head 1 further comprises a reversing transmission mechanism for driving the cutter 122 to move from front to back, and the other function of the driving mechanism 3 is to drive the cutter 122 to move from front to back reversely through the reversing transmission mechanism so as to cut. The reversing gear is connected between the drive mechanism 3 and the rear of the cutter 122. The reversing transmission mechanism comprises a gear 14 or a gear set which can be driven to rotate by the driving mechanism 3, the rear part of the cutter 122 is provided with a first rack part 1221, the upper edge of the first rack part 1221 is provided with a plurality of teeth which are sequentially arranged along the front direction, the lower part of the gear 14 or the gear set is meshed with the first rack part 1221, and the first rack part 1221 and the driving mechanism 3 are respectively positioned on the upper side and the lower side of the gear 14 or the gear set. The reversing gear train further comprises a torsion spring 15 for resetting the gear 14 or the gear set.

The driving mechanism 3 includes a center rod 31 slidable in the front-rear direction, the front portion of the center rod 31 has a second rack portion 310, the lower edge of the second rack portion 310 is provided with a plurality of teeth arranged in sequence in the front-rear direction, the first rack portion 1221 and the second rack portion 310 are respectively located on opposite sides of the gear 14 or the gear train, the surgical cutting stapler has a cutting state, and when the surgical cutting stapler is in the cutting state, the first rack portion 1221 and the second rack portion 310 are respectively engaged with opposite sides of the gear 14 or the gear train.

The driving mechanism 3 further comprises a push rod 32 slidable in the front-rear direction for pushing the staple pushing member 132 forward, a transmission assembly connected between the push rod 32 and the center rod 31 such that the push rod 32 can slide along with the center rod 31, the surgical cutting stapler further having a staple striking state in which the second rack portion 310 is disengaged from the gear 14 or the gear set and the staples are pushed out of the cartridge housing 131 by the staple pushing member 132 when the surgical cutting stapler is in the staple striking state.

The surgical cutting stapler has an initial state in which the second rack portion 310 of the central rod 31 is located a distance behind the front end portion of the push rod 32. Thus, as the center rod 31 is fired to slide forward, the surgical cutting stapler is transitioned from the initial state to the stapling state and then to the cutting state.

The transmission assembly includes a first slide groove 3a formed on the center rod 31 and extending in the front-rear direction, a first shaft 3b slidably disposed in the first slide groove 3a, a first hinge rod 3c having a front end portion rotatably connected to a rear end portion of the push rod 32 through the first shaft 3b, a second slide groove 3d formed on the center rod 31 and extending obliquely in the up-down direction, a second shaft 3e slidably disposed in the second slide groove 3d, a second hinge rod 3f having a front end portion rotatably connected to a rear end portion of the first hinge rod 3c through the second shaft 3e, a third slide groove 3g formed on the center rod 31 and extending in the front-rear direction, and a third shaft 3h slidably disposed in the third slide groove 3g, the rear end portion of the second hinge rod 3f being rotatably connected to the rear case 30 through the third shaft 3 h. The upper end of the second chute 3d communicates with the front end of the third chute 3g, the second chute 3d extends obliquely upward from front to back, and the first chute 3a and the second chute 3d are on the same straight line. When the surgical cutting stapler is in a stapling state, under the action of the transmission device, namely, the second shaft 3e slides in the second sliding groove 3d, so that the first hinging rod 3c and the second hinging rod 3f are in the same straight line, the sliding distance of the push rod 32 is larger than that of the center rod 31, the staples are pushed out of the shell 131 by the pushing piece 132, and the cutter 122 is positioned in the shell 131; when the surgical cutting stapler is in the cutting position, the central rod 31 continues to slide forward, and as the first shaft 3b slides within the first chute 3a, the second shaft 3e and the third shaft 3h slide within the third chute 3g, so that the second rack portion 310 engages with the gear 14 or gear set to drive the cutter 122 to cut from front to rear.

The driving mechanism 3 further comprises a firing handle 33 rotatably connected with the handle assembly 2, and a firing member 34 which is connected with the firing handle 33 and can rotate along with the rotation of the firing handle 33, wherein the upper end part of the firing member 34 is provided with a position which is abutted with the rear end surface of the center rod 3131 so as to push the center rod 31 to slide forwards.

After the central rod 31 is pushed forward to a certain position, the central rod 31 is meshed with the gear 14 or the gear set, the gear 14 or the gear set drives the cutter 122 to move, and the cutter 122 moves from the nail supporting seat 121 side to the nail bin assembly 13 side to cut tissues until the cutter pad 133 is cut off. After cutting is completed, release reset is carried out, the cutter 122 and the nail bin assembly 13 are reset, and the instrument cannot be fired again. The component replacement process is as follows: and pulling out the nail bin assembly, then taking out the assembly to be replaced, aligning the instrument to be meshed with the nail bin assembly, pushing in the instrument body direction, and finishing the assembly replacing action after sounding feedback is detected.

The above-described embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, not to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. The utility model provides a surgical cutting anastomat, includes the execution head that is located the front end, is located the handle subassembly of rear end, the execution head includes the front frame, locates nail anvil subassembly and detachably set up in on the front frame nail storehouse subassembly, nail storehouse subassembly is located behind the nail anvil subassembly, nail storehouse subassembly includes the nail storehouse shell, is located the nail in the nail storehouse shell, but back-and-forth sliding sets up be used for with the nail ejector pin of nail storehouse shell, nail anvil subassembly is including fixing locating support the nail seat on the front frame, be formed with on the terminal surface of support the nail seat with the nail shaping groove that the nail corresponds, its characterized in that: the surgical stapler comprises a staple cartridge shell, a staple anvil assembly, a cutter, a reversing transmission mechanism, a driving mechanism and a surgical stapler, wherein the staple cartridge assembly further comprises a knife pad arranged in the staple cartridge shell, the cutter is arranged on the front frame in a front-back sliding mode, the front part of the cutter is provided with a cutting part positioned in front of the knife pad, the actuating head further comprises the reversing transmission mechanism used for driving the cutter to move from front to back, the surgical stapler further comprises the driving mechanism used for driving the staple pushing member to move from back to front, the driving mechanism is connected between the actuating head and the handle assembly, the reversing transmission mechanism comprises a gear or a gear set which can be driven to rotate by the driving mechanism, the rear part of the cutter is provided with a first rack part, the first rack part is provided with a plurality of teeth which are sequentially arranged along the front direction, the driving mechanism is provided with a second rack part, the first rack part and the second rack part are respectively positioned on two opposite sides of the gear or the gear set, and the surgical stapler is in a cutting state, and when the surgical stapler is in the cutting state, the first rack part and the second rack part are respectively meshed with the two sides of the gear or the gear set.

2. The surgical cutting stapler of claim 1, wherein: the drive mechanism includes a center rod slidable in the front-rear direction, a front portion of the center rod having the second rack portion.

3. The surgical cutting stapler of claim 2, wherein: the driving mechanism further comprises a push rod which can slide along the front-back direction and is used for pushing the nail pushing piece forwards, and a transmission component which is connected between the push rod and the center rod and enables the push rod to slide along the center rod, the surgical cutting anastomat further has a nail striking state, when the surgical cutting anastomat is in the nail striking state, the second rack part is separated from the gear or the gear group, and the staples are pushed out of the nail bin shell by the nail pushing piece.

4. The surgical cutting stapler of claim 3, wherein: the transmission assembly comprises a first chute formed on the center rod and extending along the front-back direction, a first shaft arranged in the first chute in a sliding manner, a first hinging rod with the front end part connected with the rear end part of the leg rod in a rotating manner through the first shaft, a second chute formed on the center rod and extending obliquely along the up-down direction, a second shaft capable of being arranged in the second chute in a sliding manner, a second hinging rod with the front end part connected with the rear end part of the first hinging rod in a rotating manner through the second shaft, a third chute formed on the center rod and extending along the front-back direction, and a third shaft arranged in the third chute in a sliding manner, wherein the rear end part of the second hinging rod is connected with the rear shell in a rotating manner through the third shaft.

5. The surgical cutting stapler of claim 3, wherein: the surgical cutting stapler has an initial state in which the second rack portion of the central rod is located a distance behind the forward end portion of the push rod.

6. The surgical cutting stapler of claim 5, wherein the central rod is configured to engage with the gear or gear set after being pushed forward to a position.

7. The surgical cutting stapler of claim 1, wherein: the driving mechanism further comprises a rear shell, a firing handle rotatably arranged on the rear shell, and a firing piece connected with the firing handle and capable of rotating along with the firing handle, wherein the firing piece is provided with a position which is propped against the rear end of the center rod to push the center rod to slide forwards.

8. The surgical cutting stapler of claim 1, wherein: the reversing gear further includes a torsion spring for resetting the gear or gear set.

9. The surgical cutting stapler of claim 1, wherein: the nail pushing piece comprises a plurality of rows of nail pushing needles which are respectively arranged at the left side and the right side of the knife pad.

10. The surgical cutting stapler of claim 1, wherein: the front frame is provided with a locating pin, the cutter is provided with a long groove extending along the front-back direction, and the locating pin can be inserted into the long groove in a sliding manner along the front-back direction.