CN106667537A - A surgical cutting stapler - Google Patents

Abstract

The invention discloses a surgical cutting anastomat, wherein a staple and a knife pad are positioned on the same side of cut tissue and can be integrally replaced, so that the assembly replacement operation is simplified. The surgical cutting anastomat comprises an execution head, the execution head comprises an anvil component and a nail bin component, the nail bin component comprises a nail bin shell, a nail positioned in the nail bin shell, a nail pushing component which is arranged in the nail bin shell in a front-back sliding mode and used for pushing the nail out of the nail bin shell, the nail bin component further comprises a knife pad arranged in the nail bin shell, the anvil component further comprises a cutter which is arranged on a front frame in a front-back sliding mode, a cutting part positioned in front of the knife pad is formed in the front of the cutter, the execution head further comprises a reversing transmission mechanism used for driving the cutter to move from front to back, the surgical cutting anastomat further comprises a driving mechanism used for driving the nail pushing component to move from back to front, the driving mechanism is connected between the execution head and a handle component, and the reversing transmission mechanism is connected between the driving mechanism and the.

Description

A surgical cutting stapler

technical field

The invention belongs to the field of medical instruments, in particular to a surgical cutting stapler.

Background technique

Traditional straight and curved transverse cutting staplers are mainly used for the reconstruction of the digestive tract where the surgical field is difficult to expose and the creation of anastomotic stoma and the closure of the stump or incision in organ resection. At present, the general use process of the transverse cutting stapler is: after the locking handle is positioned to lock the tissue, the firing handle is pushed, the cutter hidden in the staple cartridge assembly is pushed by the central rod driven by the firing handle, and the other side of the tissue to be cut is The anvil and the knife pad that provide the tissue cutting platform, the driven straight cutter cuts off the knife pad during the whole cutting process represents the completion of the cutting task. Cut shims cannot be reused under normal circumstances.

The operation of the same patient cannot be completed with one incision, and multiple incisions are required. If the instrument is changed every time the incision is made, the patient's treatment cost will be increased. Therefore, in general, it is necessary to provide instruments that can replace components. Reduce costs without compromising patient health. Existing component replacement devices usually replace the nail block, knife backing, and staple cartridge components together. It is very difficult to replace multiple parts together, and these parts are not fixed as a whole, requiring the replacement personnel to mobilize the components. The position of each part, and the degree of freedom between each part is relatively high, it is easy to misuse, and it is impossible for untrained people to change it. It is also very laborious for trained people. The process of changing components is a waste of doctors' energy and time. operation time.

For example, Chinese patent CN101966093B discloses a laparoscopic surgical cutting stapler with a replaceable staple cartridge assembly, the execution head is composed of an execution frame, a slide bar, a staple cartridge assembly and an anvil assembly, and there are nail grooves, Nail pushing holes, sliding plate grooves and pushing knife grooves, the end face of the anvil assembly has staple forming grooves corresponding to the positions of the staples in the staple cartridge assembly and cutting grooves corresponding to the positions of the pushing knife grooves in the staple cartridge shell , a cutting knife is installed in the push knife groove of the staple cartridge shell, and there is an arc-shaped chute at the proximal end of the staple cartridge shell. When the staple cartridge assembly is in use, the slide bar moves from the proximal end of the staple cartridge assembly to the When moving, the staple pushing slide plate relies on its slope to push the staple pushing block to push out the staples from the nail groove when the staple pushing block moves in the staple pushing hole. Although its nail cartridge assembly is easy to replace, after a suturing, the staple cartridge assembly and the nail anvil assembly provided with the knife pad still need to be replaced respectively, which is not convenient enough to use.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a surgical cutting stapler, the staples and knife pads are located on the same side of the tissue to be cut, and can be replaced integrally, thereby simplifying the operation of component replacement.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A surgical cutting stapler, comprising an execution head at the front end and a handle assembly at the rear end, the execution head includes a front frame, an anvil assembly and a staple cartridge assembly arranged on the front frame, the staple cartridge assembly includes The staple cartridge case, the staples located in the staple cartridge case, the nail pusher for pushing the staples out of the staple cartridge case, and the nail anvil The assembly includes a nail anvil fixed on the front frame, and the end surface of the nail anvil is formed with a staple forming groove corresponding to the staple, and the staple cartridge assembly also includes a The knife pad in the shell, the nail anvil assembly also includes a cutting knife that is slidably arranged on the front frame forward and backward, the front part of the cutting knife is formed with a cutting portion located in front of the knife pad, and the execution The head also includes a reversing drive mechanism for driving the cutter to move from front to back, and the surgical cutting stapler also includes a drive mechanism for driving the pusher to move from back to front, and the drive mechanism is connected to Between the execution head and the handle assembly, the reversing transmission mechanism is connected between the driving mechanism and the rear part of the cutter.

Preferably, the reversing transmission mechanism includes a gear or a gear set that can be driven to rotate by the driving mechanism, the rear part of the cutter has a first rack part, and the first rack part is provided with A plurality of teeth are arranged, the gear or gear set meshes with the first rack portion, and the first rack portion and the driving mechanism are respectively located on opposite sides of the gear or gear set.

More preferably, the drive mechanism includes a center rod that can slide in the front-rear direction, and the front part of the center rod has a second rack portion, and the second rack portion is provided with a plurality of teeth arranged in sequence in the front-rear direction. , the first rack portion and the second rack portion are respectively located on opposite sides of the gear or the gear set, the surgical cutting stapler has a cutting state, when the surgical cutting stapler is in the cutting state, The first rack portion and the second rack portion mesh with opposite sides of the gear or gear set, respectively.

Further, the drive mechanism also includes a push rod that can slide forward and backward and is used to push the nail pusher forward, and is connected between the push rod and the central rod so that the push rod can follow the The transmission assembly of the central rod sliding, the surgical cutting stapler also has a nailing state, when the surgical cutting stapler is in the nailing state, the second rack part is disengaged from the gear or the gear set, The staples are pushed out of the cartridge shell by the nail pushing member.

Furthermore, the transmission assembly includes a first chute formed on the central rod and extending in the front-rear direction, a first shaft slidably arranged in the first chute, a front end and the pusher rod The rear end of the rear end is rotatably connected to the first hinged rod through the first shaft, the second chute formed on the central rod and extending obliquely in the up and down direction, and can be slidably arranged on the second chute The second hinged shaft, the front end and the rear end of the first hinged rod are rotatably connected through the second shaft, the second hinged rod formed on the central rod and extending in the front-to-back direction The third chute, the third shaft slidably arranged in the third chute, the rear end of the second hinged rod is rotatably connected with the component frame through the third shaft.

Furthermore, the surgical cutting stapler has an initial state, and when the surgical cutting stapler is in the initial state, the second rack portion of the central rod is located at a certain distance behind the front end portion of the push rod.

Further, the driving mechanism further includes a rear shell, a firing handle rotatably arranged on the rear shell, a firing piece connected to the firing handle and capable of rotating with the firing handle, and the firing piece has a The rear end of the central rod abuts to push the central rod to slide forward.

More preferably, the reversing transmission mechanism further includes a torsion spring for restoring the gear or the gear set.

Preferably, the nail pushing member includes a plurality of rows of nail pushing pins respectively arranged on the left and right sides of the knife shim.

Preferably, the front frame is provided with a positioning pin, and the cutter is provided with a long slot extending along the front-rear direction, and the positioning pin is slidably inserted in the long slot along the front-back direction.

The present invention adopts above-mentioned technical scheme, has following advantages compared with prior art:

The knife pad and the staple cartridge assembly are located on the same side of the cut tissue, so that when changing the assembly, only the staple cartridge assembly containing the staples and the knife cushion can be replaced, and the staple and knife can be realized through simple operations. Pad replacement, instrument replacement is simple and convenient, simplifying the operation of component replacement. It solves the problem that in the prior art, the separation of the knife shim and the staple cartridge assembly is located on both sides of the tissue to be cut, and eliminates many difficulties such as multiple positioning positions and instability of the replaced assembly when changing the assembly, and improves the use of the replacement assembly. Physical examination and reduction Probability of error when substituting components.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

Accompanying drawing 1 is the schematic diagram when a kind of surgical cutting stapler of the present invention is in initial state;

Accompanying drawing 2 is the schematic diagram of a kind of staple cartridge assembly of the present invention;

Accompanying drawing 3 is the schematic diagram of a kind of cutter of the present invention;

Accompanying drawing 4 is the schematic diagram when the execution head shown in accompanying drawing 1 is in the hammering state;

Accompanying drawing 5 is a schematic diagram of the execution head shown in Fig. 4 omitting the left anvil;

Accompanying drawing 6 is the schematic diagram when the executive head shown in accompanying drawing 1 is in the cutting state;

Accompanying drawing 7 is a schematic diagram of the actuator head shown in Fig. 6 omitting the left nail seat.

In the above drawings,

1. Executive head; 2. Handle assembly; 3. Driving mechanism;

11. Front frame; 110. Locating pin; 12. Nail anvil assembly; 13. Nail bin assembly; 14. Gear; 15. Torsion spring;

121. Antagonizing nail seat; 122. Cutter; 1220. Cutting part; 1221. First rack part; 1222. Long groove;

131, the nail magazine shell; 132, the push nail piece; 133, the knife shim;

30. Rear shell; 31. Center rod; 310. Second rack; 32. Push rod; 33. Firing handle; 34. Firing piece; 3a. First chute; 3b. First shaft; 3c. First 3d, the second chute; 3e, the second shaft; 3f, the second articulated rod; 3g, the third chute; 3h, the third shaft.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

The orientation words such as front and back mentioned in the present invention are defined according to the usual viewing angles of those skilled in the art and for the convenience of description, and are not limited to specific directions. For example, front and back correspond to the left and right sides of the paper in Figure 1, respectively.

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

The execution head 1 includes a front frame 11 , an anvil assembly 12 arranged on the front frame 11 , and a staple cartridge assembly 13 arranged on the front frame 11 . Wherein, the staple cartridge assembly 13 is specifically configured to be detachable with the front frame 11, and the front frame 11 is provided with a receptacle that cooperates with the staple cartridge assembly 13, and the staple cartridge assembly 13 can be inserted into the receptacle slidably forward and backward for suturing. And it can be disassembled and replaced after one stitch.

The staple cartridge assembly 13 includes a staple cartridge case 131 with a cavity inside, and a plurality of staples for suturing tissues in the staple cartridge case 131. The staple cartridge case 131 is formed with a plurality of nail groove holes for ejecting the staples. The cartridge assembly 13 also includes a staple pusher 132 slidably disposed in the staple cartridge housing 131 along the front-rear direction for pushing the staples out of the staple slot holes. The nail bin assembly 13 also includes a knife shim 133 that is arranged in the nail bin shell 131 and can cooperate with the cutter. The knife shim 133 is specifically arranged on the nail pushing piece 132, and the nail pushing piece 132 has multiple rows of nail pushing needles. The left and right sides of 133 are respectively provided with at least one row of nail pushing pins.

The anvil assembly 12 includes a nail anvil 121 capable of cooperating with a staple, and a staple forming groove corresponding to the staple is formed on a rear end surface of the nail anvil 121 . After the staples are pushed out of the staple cartridge shell 131 and pass through the tissue, the staples contact the anvil 121 to be bent and formed under the action of the staple forming grooves. The staple cartridge assembly 13 is located behind the anvil assembly 12, and the two are oppositely arranged with a certain distance therebetween. The nail anvil assembly 2 also includes a cutting knife 122 slidably arranged on the front frame 11 forward and backward, and a cutting portion 1220 located in front of the knife pad 133 is formed on the front of the cutting knife 122 . Corresponding to the nail pusher 132 , at least one nail abutment seat 121 is respectively provided on the left and right sides of the cutter 122 . Specifically, the front frame 11 is provided with a positioning pin 110 , and the cutter 122 is provided with a long slot 1222 extending along the front-rear direction, and the positioning pin 110 is slidably inserted in the long slot 1222 along the front-back direction. There are multiple long slots 1222 and they are set at different positions of the cutter 122 .

The above-mentioned driving mechanism 3 is used to drive the staple pusher 132 to move from back to front to push out the staples for suturing. The execution head 1 also includes a reversing transmission mechanism for driving the cutting knife 122 to move from front to back. Another function of the driving mechanism 3 is to drive the cutting knife 122 to move backwards from front to back through the reversing transmission mechanism to perform cutting. The reversing transmission mechanism is connected between the driving mechanism 3 and the rear portion of the cutter 122 . The reversing transmission mechanism includes a gear 14 or a gear set that can be driven and rotated by the drive mechanism 3. The rear portion of the cutter 122 has a first rack portion 1221, and the upper edge of the first rack portion 1221 is provided with multiple gears arranged in sequence along the front direction. The lower part of the gear 14 or the gear set meshes with the first rack part 1221 and the first rack part 1221 and the driving mechanism 3 are respectively located on the upper and lower opposite sides of the gear 14 or the gear set. The reversing transmission mechanism also includes a torsion spring 15 for resetting the gear 14 or the gear set.

The drive mechanism 3 includes a center rod 31 that can slide 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 along the front-rear direction. A rack portion 1221 and a second rack portion 310 are respectively located on opposite sides of the gear 14 or the gear set. The surgical cutting stapler has a cutting state. When the surgical cutting stapler is in the cutting state, the first rack portion 1221 and The second rack portion 310 meshes with opposite sides of the gear 14 or the gear set, respectively.

The driving mechanism 3 also includes a push rod 32 that can slide forward and backward and is used to push the nail pusher 132 forward, and is connected between the push rod 32 and the central rod 31 so that the push rod 32 can slide with the central rod 31. , the surgical cutting stapler also has a nailing state, when the surgical cutting stapler is in the nailing state, the second rack part 310 is separated from the gear 14 or the gear set, and the staples are pushed to the staple cartridge shell by the nail pushing member 132 131 outside.

The surgical cutting stapler has an initial state. When the surgical cutting stapler is in the initial state, the second rack portion 310 of the central rod 31 is located behind the front end of the push rod 32 for a certain distance. Therefore, when the central rod 31 is fired and slides forward, the surgical cutting stapler first switches from the initial state to the nailing state, and then switches to the cutting state.

The transmission assembly includes a first chute 3a formed on the central rod 31 and extending in the front-rear direction, a first shaft 3b slidably arranged in the first chute 3a, the front end and the rear end of the push rod 32 pass through the first shaft 3b is rotatably connected to the first hinge rod 3c, the second chute 3d formed on the central rod 31 and extending obliquely in the up and down direction, the second shaft 3e that can be slidably arranged in the second chute 3d, the front end and the first chute The rear end of a articulated rod 3c is rotatably connected to the second articulated rod 3f through the second shaft 3e, the third chute 3g formed on the center rod 31 and extending in the front-rear direction is slidably disposed in the third chute 3g The third shaft 3h, the rear end of the second hinged rod 3f is rotatably connected with the rear shell 30 through the third shaft 3h. The upper end of the second chute 3d communicates with the front end of the third chute 3g, the second chute 3d extends obliquely 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 the nailing state, under the action of the transmission device, the second shaft 3e slides in the second chute 3d, so that the first hinged rod 3c and the second hinged rod 3f are in the same straight line, Thereby make the sliding distance of push rod 32 be greater than the sliding distance of center bar 31, thereby make staple be pushed out housing 131 by push piece 132, cutter 122 is positioned at housing 131; When this surgical cutting stapler is in cutting state, center The rod 31 continues to slide forward. Since the first shaft 3b slides in the first chute 3a, the second shaft 3e and the third shaft 3h slide in the third chute 3g, so that the second rack part 310 and the gear 14 or The gear set meshes to drive the cutter 122 to cut from front to back.

The driving mechanism 3 also includes a firing handle 33 that is rotatably connected to the handle assembly 2, and a firing member 34 that is connected to the firing handle 33 and can rotate with the rotation of the firing handle 33. The upper end of the firing member 34 has a central rod 3131 The rear end surface of the center rod 31 is abutted against to push forward the sliding position of the central rod 31 .

When the central rod 31 is pushed forward to a certain position, the central rod 31 meshes with the gear 14 or the gear set, and the gear 14 or the gear set drives the cutting knife 122 to move, and the cutting knife 122 realizes the direction from the nail holder 121 to the nail cartridge assembly. 13 moves sideways and cuts tissue until cutting off the knife pad 133. After the cutting is completed, release and reset is performed, the cutter 122 and the staple cartridge assembly 13 are reset, and the instrument will not fire again. The component replacement process is as follows: pull out the staple cartridge component, then take out the new component to be replaced, align the instrument and the staple cartridge component to the insertion and withdrawal port, press it in the direction of the device body, and hear the click sound feedback, and the replacement component action is completed.

The above-mentioned embodiment is only to illustrate the technical concept and characteristics of the present invention. It is a preferred embodiment, and its purpose is to allow those familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot limit the present invention. scope of protection. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A surgical cutting stapler, comprising an execution head positioned at the front end, a handle assembly positioned at the rear end, the execution head comprising a front frame, an anvil assembly and a staple bin assembly arranged on the front frame, the nail bin The assembly includes a staple cartridge case, staples located in the staple cartridge case, and a nail pusher for pushing the staples out of the staple cartridge case, which is slidably arranged back and forth in the staple cartridge case. The nail anvil assembly includes a nail anvil fixedly arranged on the front frame, and the end surface of the nail anvil is formed with a staple forming groove corresponding to the staple, and it is characterized in that: the nail cartridge assembly also includes The knife pad arranged in the nail cartridge shell, the anvil assembly also includes a cutting knife which is slidably arranged on the front frame forward and backward, and the front part of the cutting knife is formed with a knife pad in front of the knife pad The cutting part, the execution head also includes a reversing transmission mechanism for driving the cutter to move from front to back, and the surgical cutting stapler also includes a driving mechanism for driving the pusher to move from back to front, The driving mechanism is connected between the execution head and the handle assembly, and the reversing transmission mechanism is connected between the driving mechanism and the rear part of the cutter. 2. The surgical cutting stapler according to claim 1, characterized in that: the reversing transmission mechanism includes a gear or a gear set that can be driven to rotate by the driving mechanism, and the rear portion of the cutter has a first rack part, the first rack part is provided with a plurality of teeth arranged in sequence along the front direction, the gear or gear set meshes with the first rack part and the first rack part and the driving mechanism are respectively on opposite sides of the gear or gear set. 3. The surgical cutting stapler according to claim 2, characterized in that: the driving mechanism comprises a central rod that can slide in the front-rear direction, the front portion of the central rod has a second rack portion, and the second The rack part is provided with a plurality of teeth arranged in sequence along the front-rear direction, the first rack part and the second rack part are respectively located on opposite sides of the gear or the gear set, the surgical cutting stapler has a cutting state, when the surgical cutting stapler is in the cutting state, the first rack portion and the second rack portion mesh with opposite sides of the gear or gear set respectively. 4. The surgical cutting stapler according to claim 3, characterized in that: the driving mechanism also includes a push rod that can slide along the front and rear directions and is used to push the nail pusher forward, and is connected to the push rod and the transmission assembly between the central rod so that the push rod can slide with the central rod, the surgical cutting stapler also has a nailing state, when the surgical cutting stapler is in the nailing state, the The second rack part is disengaged from the gear or the gear set, and the staples are pushed out of the cartridge shell by the nail pushing member. 5. The surgical cutting stapler according to claim 4, characterized in that: the transmission assembly includes a first chute formed on the central rod and extending along the front-to-back direction, and is slidably arranged on the first chute The first shaft inside, the first hinged rod that is rotatably connected to the rear end of the pusher rod through the first shaft, the front end, and the second hinged rod that is formed on the central rod and extends obliquely along the up and down direction. a chute, a second shaft that can be slidably arranged in the second chute, a second hinged rod whose front end is rotatably connected to the rear end of the first hinged rod through the second shaft, A third chute formed on the central rod and extending in the front-rear direction, a third shaft slidably arranged in the third chute, the rear end of the second hinged rod passes through the The third shaft is rotatably connected with the component frame. 6. The casing cutting stapler according to claim 4, characterized in that: the surgical cutting stapler has an initial state, when the surgical cutting stapler is in the initial state, the second rack portion of the central rod A certain distance behind the front end of the push rod. 7. The surgical cutting stapler according to claim 3, characterized in that: the driving mechanism further comprises a rear case, a firing handle rotatably arranged on the rear case, a movable handle connected to the firing handle The firing part is rotated by the firing handle, and the firing part has a position abutting against the rear end of the central rod to push the central rod to slide forward. 8. The surgical cutting stapler according to claim 2, wherein the reversing transmission mechanism further comprises a torsion spring for resetting the gear or the gear set. 9 . The surgical cutting stapler according to claim 1 , wherein the nail pushing member comprises a plurality of rows of nail pushing pins respectively arranged on the left and right sides of the knife pad. 10 . 10. The surgical cutting stapler according to claim 1, characterized in that: positioning pins are provided on the front frame, long slots extending along the front and rear directions are provided on the cutting knife, and the positioning pins can be moved along the front and rear directions. Slidingly inserted in the long slot.