anastomat

Abstract

The present application discloses an anastomat, comprising a staple cartridge assembly, a staple cartridge seat and a cover plate; the cover plate is detachably installed on the staple cartridge assembly; the staple cartridge seat comprises an installation space for installing the staple cartridge assembly, and the staple cartridge assembly is detachably installed in the installation space; the staple cartridge seat is provided with a safety device, which comprises a limiting element and a trigger element; the trigger element is connected with the limiting element; the limiting element has a first position and a second position; when in the first position, the limiting element is at least partially located in the installation space of the staple cartridge assembly; when in the second position, the limiting element is located outside the installation space of the staple cartridge assembly; the trigger element can be triggered under the action of the cover plate; when the trigger element is triggered, the limiting element can move from the first position to the second position under the action of the trigger element or the staple cartridge assembly. The anastomat of the present application can ensure that the used staple cartridge assembly cannot be installed into the staple cartridge seat, thereby improving the safety of the operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical instruments, in particular to an anastomat. BACKGROUND

[0002] An anastomat suitable for surgical operation is a surgical cutting anastomat which can cut and suture excess tissue while suturing a wound of a patient, and is widely used in minimally invasive surgeries such as abdominal surgery, gynecology, pediatrics and thoracic surgery for tissue cutting and suturing. The surgical cutting anastomat enters the patient's body through the cannula of the puncture device precisely positioned at the surgical site, and then makes a longitudinal incision in the tissue and applies anastomotic staples on the opposite sides of the incision, thereby cutting and suturing the tissue. The anastomat comprises an end effector, which comprises a staple cartridge seat and a staple anvil seat, the staple cartridge seat being used to receive a staple cartridge assembly; the staple cartridge assembly comprises a staple cartridge body and anastomotic staples arranged in the staple cartridge body, the staple cartridge body is provided with a plurality of staple cavities for receiving the anastomotic staples, and the staple cartridge body comprises a top end face, the top end face being provided with a staple outlet formed by the staple cavities penetrating through the top end face.

[0003] Once the doctor determines that the end effector clamps the target tissue, the surgical cutting anastomat can be fired to cut and suture the tissue. When suturing, the top end face is in contact with the sutured tissue, and the cutting member in the surgical cutting anastomat pushes the wedge-shaped pusher in the staple cartridge to move, so that the anastomotic staple driver drives the anastomotic staple in the staple cartridge to move upward from the staple cavity, to pierce and suture the target tissue (i.e. the staple is ejected).

[0004] In actual use, if the doctor accidentally installs the used staple cartridge assembly into the staple cartridge seat, it may not be possible to suture during the operation, or even cut without suturing, thereby causing a medical accident. However, no one has developed or used the device described in the appended claims before the present inventor. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application aims to provide an anastomat which can ensure that the used staple cartridge assembly (without the cover plate installed) cannot be installed into the staple cartridge seat, thereby avoiding the situation that the tissue cannot be anastomatized or the tissue is cut without being sutured due to the installation of the used staple cartridge assembly.

[0006] The present application is achieved by the following technical solutions:

[0007] An anastomat comprises a staple cartridge assembly, a staple cartridge seat and a cover plate; the cover plate is detachably mounted on the staple cartridge assembly; the staple cartridge seat comprises a mounting space for mounting the staple cartridge assembly, the staple cartridge assembly is detachably mounted in the mounting space; the staple cartridge seat is provided with a safety device, the safety device comprises a limiting element and a trigger element; the trigger element and the limiting element are connected; the limiting element has a first position and a second position; in the first position, the limiting element is at least partially located in the mounting space; in the second position, the limiting element is located outside the mounting space; the trigger element is triggered under the action of the cover plate; when the trigger element is triggered, the limiting element moves from the first position to the second position under the action of the trigger element and / or the staple cartridge assembly.

[0008] Further, the safety device further comprises a pivot shaft, the trigger element and the limiting element are pivotally mounted on the staple cartridge seat through the pivot shaft; the trigger element drives the limiting element to pivotally move from the first position to the second position under the action of the cover plate.

[0009] Further, the limiting element and the trigger element are integrally formed, and together constitute a body of the safety device, the body is provided with a shaft hole; the pivot shaft passes through the shaft hole.

[0010] Further, the trigger element is provided with a shaft hole, the pivot shaft passes through the shaft hole, and a proximal end of the limiting element is connected to a distal end of the trigger element.

[0011] Further, the trigger element and the limiting element are arranged at an angle.

[0012] Further, in the first position, the limiting element abuts against the staple cartridge seat, and the trigger element is arranged at an angle with the staple cartridge seat.

[0013] Further, the limiting element comprises a bottom surface and a side surface connected to a distal end of the bottom surface, the bottom surface abuts against the staple cartridge seat in the first position; the side surface is at least partially arranged in an inclined manner.

[0014] Further, in the second position, the limiting element abuts against the staple cartridge assembly, and the trigger element abuts against the staple cartridge seat.

[0015] Further, in the first position, the trigger element locks the limiting element, so that the limiting element is in a locked state; when the trigger element is triggered by the cover plate, the limiting element changes from the locked state to an unlocked state; when the limiting element is in the unlocked state, it can move from the first position to the second position under the action of the staple cartridge assembly.

[0016] Further, the trigger element comprises a trigger body and a first elastic member, one end of the first elastic member is connected with the cartridge seat, and the other end is connected with the trigger body; the trigger body partially enters the limiting element in the first position to make the limiting element in the locked state; the trigger body can move under the action of the cover plate to disengage from the limiting element, so that the limiting element is in the unlocked state.

[0017] Further, the limiting element comprises a second elastic member, a fixed part and a movable part, the fixed part is connected with the cartridge seat; one end of the second elastic member is connected with the fixed part, and the other end is connected with the movable part; when the limiting element is in the unlocked state, the movable part can move towards the fixed part under the action of the cartridge assembly to move from the first position to the second position.

[0018] Further, the cover plate comprises a first cover plate and a second cover plate extending downward from the proximal end of the first cover plate; the second cover plate is arranged at an angle with the first cover plate; the trigger element is triggered under the action of the second cover plate.

[0019] Further, the cover plate in the installed state has a proximal end that exceeds the proximal end of the cartridge assembly.

[0020] Further, the cartridge seat comprises a slot arranged at the bottom thereof, the slot is used for the cutting knife assembly of the anastomat to pass through; the anastomat has two safety devices, and the two safety devices are symmetrically arranged on both sides of the slot.

[0021] Further, the distal end of the cartridge assembly is provided with a first limiting part, and the distal end of the cartridge seat is provided with a second limiting part; the first limiting part cooperates with the second limiting part to make the cartridge assembly fixedly installed on the cartridge seat.

[0022] Further, the first limiting part is a protrusion, and the second limiting part is a groove; or the first limiting part is a groove, and the second limiting part is a protrusion.

[0023] An anastomat comprises a cartridge seat; the cartridge seat comprises an installation space for installing a cartridge assembly; the cartridge seat is provided with a safety device, the safety device comprises a limiting element and a trigger element; the trigger element and the limiting element are connected; the limiting element has a first position and a second position; in the first position, the limiting element is at least partially located in the installation space; in the second position, the limiting element is located outside the installation space; when the trigger element is triggered, the limiting element moves from the first position to the second position under the action of the trigger element and / or the cartridge assembly.

[0024] Further, the trigger element is triggered under the action of a cover plate detachably mounted on the staple cartridge assembly.

[0025] Further, the safety device further comprises a pivot shaft, the trigger element and the limiting element are pivotally mounted on the staple cartridge seat through the pivot shaft; the trigger element drives the limiting element to pivotally move from the first position to the second position when the trigger element is triggered.

[0026] Further, in the first position, the trigger element locks the limiting element, so that the limiting element is in a locked state; when the trigger element is triggered, the limiting element changes from the locked state to an unlocked state; when the limiting element is in the unlocked state, it can move from the first position to the second position under the action of the staple cartridge assembly.

[0027] Compared with the prior art, the beneficial effects of the present application are that by setting a safety device in the staple cartridge seat and cooperating the safety device with the cover plate, it is ensured that the staple cartridge assembly (without the cover plate) that has been used cannot be installed in the staple cartridge seat, thereby avoiding the situation that the tissue cannot be anastomosed or the tissue is cut without being sutured, improving the safety of the operation. In addition, the cover plate can be fully utilized, which not only can protect the staple cartridge assembly, but also can cooperate with the safety device to install the staple cartridge assembly, realizing a cover plate with two functions. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic view of the staple cartridge assembly and the cover plate of the anastomat shown in

[0029] Figure 2 is Figure 1 the jaw assembly of the anastomat shown in

[0030] Figure 3 is Figure 1 the jaw assembly of the anastomat shown in

[0031] Figure 4 is a schematic view of the cover plate installed on the staple cartridge assembly;

[0032] Figure 5 is Figure 4 the exploded view of the cover plate and the staple cartridge assembly shown in

[0033] Figure 6 is Figure 1 the staple cartridge seat of the anastomat shown in

[0034] Figure 7 is Figure 6A cross-sectional view of the staple cartridge seat with the safety device shown;

[0035] Figure 8 is Figure 6 A structural view of the safety device shown;

[0036] Figures 9 to 11 A view of the safety device as the cap-equipped staple cartridge assembly is being installed in the jaw assembly;

[0037] Figure 12 is a structural view of the safety device of the second embodiment of the present application;

[0038] Figure 13 is Figure 12 An enlarged view of the safety device shown;

[0039] Figure 14 is Figure 13 An exploded view of the safety device shown;

[0040] Figure 15 is a structural view of the safety device of the third embodiment of the present application;

[0041] Figure 16 is Figure 15 An enlarged view of the safety device shown;

[0042] Figure 17 is Figure 16 An exploded view of the safety device shown. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be described in further detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to explain, and not to limit, the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0044] It should be understood that the terms "proximal" and "distal" used herein are relative to the clinician who manipulates the handle of the stapler. The term "proximal" refers to the portion closer to the clinician, and the term "distal" refers to the portion farther away from the clinician. That is, the handle is proximal, and the jaw assembly is distal, and if the proximal end of a certain component means the end closer to the handle, the distal end means the end closer to the jaw assembly. The terms "upper" and "lower" are used with reference to the relative positions of the anvil seat and the staple cartridge seat of the jaw assembly. Specifically, the anvil seat is "upper", and the staple cartridge seat is "lower". However, the stapler can be used in many directions and positions, so these terms expressing relative positional relationships are not limited and absolute.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding fixed connections and integral parts, but not excluding movable connections, direct connections, or indirect connections through an intermediate medium.

[0046] like Figures 1 to 11 As shown, a stapler 100 according to a first embodiment of the present invention includes a main body 10, a rod assembly 20, and an end actuator 30 connected in sequence, as well as a cutting blade assembly (not shown) connected to the distal end of the rod assembly 30. The stapler 100 also includes a transmission mechanism (not shown), which drives the rod assembly 20 to move to drive the cutting blade assembly and / or drives the end actuator 30 to move, thereby completing the cutting and anastomosis work and / or clamping and releasing tissue work. The stapler 100 can be a manual stapler or an electric stapler. When it is an electric stapler, it also includes a power module (not shown), which provides power to the transmission mechanism. The power module includes a motor that outputs electric power when it receives electrical energy; the transmission mechanism is connected to the power module and operates when it receives the electric power output by the motor. Figure 1 The diagram shows an electric stapler; the manual stapler is not shown in the accompanying drawings. Unlike the electric stapler, the manual stapler's drive mechanism is powered manually, for example, by a clinician manually actuating the firing and / or closing handles. Power is then transmitted to the drive mechanism via the firing and / or closing handles, which in turn moves the lever assembly 20 to drive the cutting blade assembly and / or the end effector 30.

[0047] The main body 10 includes a head housing 101 and a handle 102 extending downward from the head housing 101, with at least a portion of the transmission mechanism housed within the head housing 101. The shaft assembly 20 includes a spindle (not shown) and a sleeve 201 fitted onto the spindle. The spindle and sleeve 201 are part of the transmission mechanism. The specific structure of the shaft assembly is prior art and will not be described further here.

[0048] The end effector 30 includes a jaw assembly and a staple cartridge assembly 303. The jaw assembly includes a staple cartridge seat 301 and a buttress seat 302 pivotally connected to the staple cartridge seat 301. The staple cartridge seat 301 includes a mounting space for mounting the staple cartridge assembly 303, and the staple cartridge assembly 303 is detachably mounted in the mounting space of the staple cartridge seat 301. The buttress seat 302 is selectively movable between an open position and a closed position, so as to clamp or release the tissue in cooperation with the staple cartridge seat 301 and the staple cartridge assembly 303. The staple cartridge assembly 303 is provided with a knife slot 304 for movement of a cutting knife assembly, the cutting knife assembly moves towards the distal end in the knife slot 304, cuts the tissue during the movement, and pushes the anastomosis staples (not shown) accommodated in the staple cartridge assembly 303 out of the staple cartridge assembly 303 to anastomose the tissue. The specific structure of the transmission mechanism for driving the movement of the cutting knife assembly, the specific structure of the end effector 30 for opening or closing, and the specific structure of the transmission mechanism and the staple cartridge assembly 303 are all prior art, and will not be described here.

[0049] The anastomat 100 further includes a cover plate 40 which is detachably mounted on the staple cartridge assembly 303. Before the staple cartridge assembly 303 is shipped, the cover plate 40 needs to be mounted on the staple cartridge assembly 303, on the one hand to prevent dust and the like from entering the staple cartridge assembly 303, and on the other hand to avoid that the anastomosis staples in the staple cartridge assembly 303 are affected in use due to extrusion or external force during storage and transportation and are separated from the body of the staple cartridge assembly 303 at the upper end of the staple slot. In use, the staple cartridge assembly 303 with the cover plate 40 is assembled into the staple cartridge seat 301 of the end effector 30 of the surgical instrument, and then the cover plate 40 is removed from the staple cartridge assembly 303, and then the end effector 30 is closed, so that the anastomosis staples can be pushed out of the staple cartridge assembly 303 by the cutting knife assembly to perform the stapling operation on the tissue. As can be seen, the unused staple cartridge assembly 303 is mounted with the cover plate 40, and the used staple cartridge assembly 303 is not provided with the cover plate 40. The cover plate 40 includes a cover body 401, a clamping hook portion 402 and a positioning ridge 403 extending downward from the cover body 401. The clamping hook portion 402 extends downward from the side edge of the cover body 401, the side edge of the staple cartridge assembly 303 is provided with a clamping groove 305, and the clamping hook portion 402 and the clamping groove 305 are clamped and matched to fix the cover plate 40 and the staple cartridge assembly 303. The positioning ridge 403 can be inserted into the knife slot 304 of the staple cartridge assembly 303 to position the cover plate 40.

[0050] The safety device 50 is arranged in the cartridge seat 301 and comprises a limiting element 501 and a triggering element 502. The limiting element 501 has a first position and a second position. In the first position, the limiting element 501 is at least partially arranged in the mounting space of the cartridge assembly 303. In the second position, the limiting element 501 is arranged outside the mounting space of the cartridge assembly 303. The first position refers to the initial position of the limiting element 501 when the cartridge assembly 303 is not mounted. In the first position, the limiting element 501 occupies part of the mounting space of the cartridge assembly 303, so that the cartridge assembly 303 cannot be mounted in the cartridge seat 301. In the second position, the limiting element 501 has left the mounting space of the cartridge assembly 303, so that the cartridge assembly 303 can be mounted in the cartridge seat 301. As described above, the unused cartridge assembly 303 is provided with the cover plate 40, and the used cartridge assembly 303 is not provided with the cover plate 40. In the operation, in order to prevent the used cartridge assembly 303 from being mistakenly mounted in the cartridge seat 301, so that the tissue cannot be anastomosed or the tissue is cut without being sutured, thereby causing a medical accident, it is necessary to ensure that the cartridge assembly 303 provided with the cover plate 40, i.e., the unused cartridge assembly 303, can be mounted in the cartridge seat 301, and the cartridge assembly 303 that has been used cannot be mounted in the cartridge seat 301. Therefore, when the cartridge assembly 303 provided with the cover plate 40 is mounted in the cartridge seat 301, the cover plate 40 acts on the triggering element 502 of the safety device 50, so that the triggering element 502 is triggered. When the triggering element 502 is triggered, the limiting element 501 can be moved from the first position to the second position under the action of the triggering element 501 and / or the cartridge assembly 303, so as to leave the mounting space, thereby enabling the cartridge assembly 303 to be mounted in the cartridge seat 301. In this embodiment, the triggering element 502 is triggered from the static state to the dynamic state.

[0051] In this embodiment, the safety device 50 is used in cooperation with the cover plate 40, which not only ensures that the cartridge assembly 303 that has been used (without the cover plate) cannot be mounted in the cartridge seat 301, thereby avoiding the situation that the tissue cannot be anastomosed or the tissue is cut without being sutured, and improving the safety of the operation. In addition, the cover plate 40 can be fully utilized, which not only protects the cartridge assembly 303, but also cooperates with the safety device 50 to mount the cartridge assembly 303, thereby realizing the dual-purpose function of one cover plate.

[0052] The cover plate 40 comprises a first cover plate 404 and a second cover plate 405 extending downwardly and obliquely from the proximal end of the first cover plate 404; the second cover plate 405 is arranged at an angle with the first cover plate 404; the first cover plate 404 and the second cover plate 405 jointly constitute a cover body 401 of the cover plate 40. When the cover plate 40 is installed on the cartridge assembly 303, i.e. the cover plate 40 is in an installed state, the proximal end of the cover plate 40 exceeds the proximal end of the cartridge assembly 303, and at this time, the proximal end of the cover plate 40 has a certain gap with the proximal end of the cartridge assembly 303. In the initial state, the cartridge assembly 303 cannot be installed due to the occupying of the limiting element 501 in the installation space of the cartridge assembly 303. When the cartridge assembly 303 with the installed cover plate 40 is installed in the cartridge seat 301, only the cover plate 40 can contact the trigger element 502, and after the proximal end of the second cover plate 405 of the cover plate 40 contacts the trigger element 502 under the action of an external force, the cover plate 40 applies a force to the trigger element 502, so that the trigger element 502 is triggered; when the trigger element 502 is triggered, the limiting element 501 moves from the first position to the second position under the action of the trigger element 502, thereby leaving out the installation space, so that the cartridge assembly 303 can be installed in the cartridge seat 301. The whole operation process is simple, convenient, easy to realize and safe and reliable.

[0053] The tail part of the cover plate 40 has a hollow part 406, which has a containing space, and the distal end of the cutting knife assembly is at least partially located in the containing space. The advantage of this design is that the space of the cartridge seat 301 can be fully utilized, so that the structure is more compact; compared with the tail part without the hollow part 406, the feeding distance of the cutting knife assembly is shortened, the energy consumption is reduced, and the working efficiency of the stapler 100 is improved. Since the safety device 50 is arranged in the cartridge seat 301, in order to facilitate the cover plate 40 to apply a force to the trigger element 501, the width of the proximal end of the second cover plate 405 is less than the width of the cartridge seat 301.

[0054] In the embodiment, the safety device 50 is located at the proximal end of the cartridge seat 301, the trigger element 502 and the limiting element 501 are connected, and the trigger element 502 is pivotably connected in the cartridge seat 301; when the trigger element 502 is triggered, the trigger element 502 changes from a static state to a motion state, and the trigger element 502 drives the limiting element 501 to pivotally move from the first position to the second position under the action of the cover plate 40.

[0055] In order to prevent the tail of the cover plate 40 from being broken when the cover plate 40 is pushed to move the trigger element 502 due to insufficient strength of the cover plate 40, during the installation of the staple cartridge assembly 303, the trigger element 502 is rotated by a first angle under the action of the cover plate 40 when the trigger element 502 is triggered by the force of the staple cartridge assembly 303; after the limiting element 501 is rotated by the first angle, the staple cartridge assembly 303 can apply force to the limiting element 501, and when the staple cartridge assembly 303 is installed into the staple cartridge seat 301 under the action of an external force, the limiting element 501 is rotated by a second angle under the action of the staple cartridge assembly 303 to move to the second position. Of course, it can be understood that the limiting element 501 can also be rotated by the second angle to move to the second position under the joint action of the cover plate 40 and the staple cartridge assembly 303 after being rotated by the first angle.

[0056] The safety device 50 further comprises a rotating shaft 503, the trigger element 502 and the limiting element 501 are pivotally installed on the staple cartridge seat 301 through the rotating shaft 503; the limiting element 501 is integrally formed with the trigger element 502, and the two together constitute the body of the safety device 50, which is provided with a shaft hole; the side of the staple cartridge seat 301 is provided with a shaft hole, one end of the rotating shaft 503 is located in the shaft hole of the body of the safety device 50, and the other end is fixedly installed in the shaft hole of the side of the staple cartridge seat 301, so as to install the safety device 50 on the staple cartridge seat 301. In order to make the movement of the safety device 50 more stable, a fixing frame 306 is arranged on the bottom of the staple cartridge seat 301, and a corresponding shaft hole is arranged on the fixing frame 306, the rotating shaft 503 passes through the shaft hole of the body of the safety device 50, one end is located in the shaft hole of the side of the staple cartridge seat 301, and the other end is located in the shaft hole of the fixing frame 306. The limiting element 501 is integrally formed with the trigger element 502, so that the structure of the safety device 50 is compact. Of course, the limiting element 501 and the trigger element 502 can also be non-integrally formed, the trigger element 502 is provided with a shaft hole, the rotating shaft 503 passes through the shaft hole of the trigger element 502, and the proximal end of the limiting element 501 is connected with the distal end of the trigger element 502. In the embodiment, the trigger element 502 and the limiting element 501 are arranged at an angle, which is beneficial to the force of the cover plate 40 acting on the trigger element 502, can save the installation space of the safety device 50, and the overall structure is more compact.

[0057] The safety device 50 further comprises a reset element, which is energized during the movement of the limiting element 501 from the first position to the second position, so that the limiting element 501 can be reset to the first position under the action of the reset element when in the second position. The presence of the reset element ensures that the surgeon can ensure that only the staple cartridge assembly 303 with the cover plate 40 can be loaded each time the staple cartridge assembly 303 is installed, further ensuring the safety of the operation. Specifically, the reset element is an elastic element. In this embodiment, the reset element is a torsion spring 504, the middle portion of which is sleeved on the rotating shaft 503 of the safety device 50, one end of the torsion spring 504 is installed in the trigger element 502, and the other end abuts against the staple cartridge seat 301.

[0058] The staple cartridge seat 301 comprises a slot 307 provided at the bottom thereof, which is used for the cutting knife assembly of the stapler 100 to pass through; the safety device 50 is arranged in the staple cartridge seat 301, and is arranged on one side of the slot 307 to achieve the function of preventing the used staple cartridge assembly 303 from being loaded into the staple cartridge seat 301. Of course, a plurality of safety devices 50 can also be arranged in the staple cartridge seat 301, for example, two safety devices 50 are arranged symmetrically on both sides of the slot 307, which has the advantage that the force applied by the cover plate 40 to the trigger element 502 of the safety device 50 is more stable.

[0059] The first limiting part 308 is provided on the distal outer side of the staple cartridge assembly 303, and the second limiting part 309 is provided on the distal outer side of the side of the staple cartridge seat 301. The first limiting part 308 cooperates with the second limiting part 309 to fix the staple cartridge assembly 303 to the staple cartridge seat. The advantages of this arrangement are that, on the one hand, it is convenient to fix and install the staple cartridge assembly 303 in place, and on the other hand, it can also prevent the used staple cartridge assembly 303 from being mistakenly installed into the staple cartridge seat 301. Specifically, in actual use, the doctor may try to install the staple cartridge assembly 303 into the staple cartridge seat 301 by avoiding the limiting element 501 during the installation of the staple cartridge assembly 303. If the limiting part is not provided on the outer side of the staple cartridge assembly 303, the staple cartridge assembly 303 will be installed into the staple cartridge seat 301. If the staple cartridge assembly 303 at this time has been used, the situation that the anastomosis cannot be performed or the tissue is cut without being sutured will occur in the surgery, causing a serious medical accident. However, due to the existence of the first limiting part 308 or the second limiting part 309, when the staple cartridge assembly 303 is tried to be installed into the staple cartridge seat 301 by avoiding the limiting element 501, the first limiting part and the second limiting part are misaligned, and the two cannot be combined. Even if the proximal end of the staple cartridge assembly 303 is installed, the distal end of the staple cartridge assembly 303 will be raised, and thus the installation cannot be performed. When the staple cartridge assembly 303 (the staple cartridge assembly is not used) with the cover plate 40 is installed, under the action of the cover plate 40, the limiting element 501 is driven by the trigger element 502 to leave the installation space of the staple cartridge assembly 303, the proximal end of the staple cartridge assembly 303 is installed into the staple cartridge seat 301, and the first limiting part 308 at the distal end of the staple cartridge assembly 303 combines with the second limiting part 309 on the staple cartridge seat 301, so that the staple cartridge assembly 303 is installed in place and fixed. Specifically, the first limiting part 308 is a protrusion, and the second limiting part 309 is a groove, or the first limiting part 308 is a groove, and the second limiting part 309 is a protrusion.

[0060] As shown in FIG. 6, it is a process diagram of the installation of the staple cartridge assembly 303 with the cover plate 40 in the present example. Figures 9 to 11

[0061] As shown in FIG. 6, it is a process diagram of the installation of the staple cartridge assembly 303 with the cover plate 40 in the present example. Figure 9 At this time, the safety device 50 is in the initial state, and the limiting element 501 is located at the first position. When at the first position, the limiting element 501 abuts against the staple cartridge seat 301, and the trigger element 502 is arranged at an angle with the staple cartridge seat 301. The limiting element 501 includes a bottom surface 505 and a side surface 506 connected to the distal end of the bottom surface 505, and the bottom surface 505 abuts against the staple cartridge seat 301 at the first position. The advantages of this arrangement are that, on the one hand, it can effectively prevent the limiting element 501 from being mistakenly driven in the initial state, and on the other hand, it is convenient for the cover plate 40 to apply force to the trigger element 502, and it also saves installation space. Figure 9 , Figure 11 ​As can be seen, when the limiting element 501 is in the first position, it occupies part of the installation space of the staple cartridge assembly 303, so the staple cartridge assembly 303 cannot be installed into the staple cartridge seat 301.

[0062] like Figure 10 As shown, the trigger element 502 is triggered by the cover plate 40, which drives the limiting element 501 to rotate towards the proximal end of the staple cartridge holder 301. During the rotation of the limiting element 501, some installation space is made up, and the staple cartridge assembly 303 is pushed into the staple cartridge holder 301. To avoid interference with the limiting element 501 during the continued advancement of the staple cartridge assembly 303, and to make the installation of the staple cartridge assembly 303 smoother, the side 506 of the limiting element 501 that connects to the distal end of the bottom surface 505 is at least partially inclined. As the limiting element 501 continues to rotate towards the proximal end of the staple cartridge holder 301, more installation space is made up.

[0063] like Figure 11 As shown, in the second position, the limiting element 501 has completely cleared the installation space for the staple cartridge assembly 303, and the staple cartridge assembly 303 is installed in place. At this time, the limiting element 501 abuts against the staple cartridge assembly 303, and the triggering element 502 abuts against the staple cartridge seat 301. More specifically, the side 506 of the limiting element 501 is parallel to and abuts against the proximal end face of the staple cartridge assembly 303, and the triggering element 502 abuts against the staple cartridge seat 301, so that the energy stored in the reset element, i.e., the torsion spring 504, is maximized, which facilitates the reset of the safety device 50 when the staple cartridge assembly 303 is removed.

[0064] In summary, in this embodiment, by providing a safety device 50 inside the staple cartridge holder 301, and by cooperating with the cover plate 40, only staple cartridge components 303 with the cover plate 40 (unused staple cartridge components) can be installed into the staple cartridge holder 301, ensuring that staple cartridge components 303 without the cover plate 40 (used staple cartridge components) cannot be installed, thereby improving the safety of the surgery.

[0065] like Figures 12 to 13 As shown, this is a stapler according to the second embodiment of the present invention. The following only describes the differences between the second embodiment and the first embodiment.

[0066] In the first embodiment, "the trigger element is triggered" refers to the trigger element changing from a static state to a moving state. When the trigger element is triggered, the trigger element drives the limiting element to move under the action of the cover plate. In this process, the trigger element and the limiting element are always in a connected state. In the second embodiment, "the trigger element is triggered" refers to the trigger element changing from a connected state with the limiting element to a disengaged state with the limiting element. In the initial state, the trigger element is connected to the limiting element, and the limiting element is locked and cannot move. When the trigger element is triggered, the trigger element is disengaged from the limiting element, i.e., separated from the limiting element, and the limiting element is unlocked. When the limiting element is in the unlocked state, it can be pushed by the cartridge assembly to move. Specifically, the trigger element can lock the limiting element when the trigger element is in the first position, so that the limiting element is in the locked state. The trigger element can be triggered under the action of the cover plate. When the trigger element is triggered, the limiting element changes from the locked state to the unlocked state. When the limiting element is in the unlocked state, it can move from the first position to the second position under the action of the cartridge assembly. Since the limiting element is at least partially located in the installation space of the cartridge assembly when it is in the first position, and since it is in the locked state, it cannot be pushed, so the cartridge assembly cannot be installed in the cartridge seat. When the cartridge assembly is installed in the cover plate, the cover plate acts on the trigger element, so that the trigger element is separated from the limiting element. At this time, the trigger element cannot lock the limiting element, and the limiting element can be pushed by the cartridge assembly, thereby leaving the installation space of the cartridge assembly.

[0067] In this embodiment, as Figures 12-14As shown, the trigger element includes a trigger body 701 and a first elastic member 703, one end of the first elastic member 703 is connected with the cartridge seat 301, and the other end is connected with the trigger body 701; the limiting element includes a second elastic member 604, a fixed part 602 and a movable part 601, along the direction from the proximal end to the distal end of the cartridge seat, the fixed part 602, the second elastic member 604 and the movable part 601 of the limiting element are sequentially arranged, the fixed part 602 is connected with the cartridge seat 301, one end of the second elastic member 604 is connected with the fixed part 602, and the other end is connected with the movable part 601. The trigger body 701 partially enters the limiting element in the first position to make the limiting element in the locked state. More specifically, the trigger body 701 extends along the direction from the proximal end to the distal end of the cartridge seat 301, the proximal end thereof is pivotably arranged in the cartridge seat 301 through a pin shaft 705, the distal end of the trigger body 701 is provided with a bent part 704, the first elastic member 703 is sleeved on the pin shaft 705, one end thereof is connected with the cartridge seat 301, and the other end is connected with the trigger body 701. In order to make the overall structure of the limiting mechanism more compact and the movement of the trigger element more stable, a lug 605 is arranged above the fixed part 602 of the limiting element, after the proximal end of the trigger body 701 passes through the pin shaft 705, one end of the pin shaft 705 is located in the shaft hole of the lug 605, and the other end is located in the shaft hole in the side wall of the cartridge seat 301. In order to facilitate the cover plate 40 to push the trigger element, the trigger element body 701 includes a turnover part 702 and is arranged above the trigger element body 701. The fixed part 602 of the limiting element is fixedly installed on the cartridge seat 301, one end of the second elastic member 604 is connected with the fixed part 602, and the other end is connected with the movable part 601, and a limiting groove 606 is arranged above the movable part 601 of the limiting element. In order to make the movement of the limiting element in the cartridge seat more stable, a sliding groove 603 is arranged below the movable part 601, an elongated convex strip 310 is arranged on the cartridge seat 301, and the sliding groove 603 moves along the elongated convex strip 310. In the first position, the bent part 704 of the trigger body 701 cooperates with the limiting groove 606 of the limiting element to lock the limiting element, that is, the movable part 701 is locked and cannot move. When the cartridge assembly 303 provided with the cover plate 40 is loaded into the cartridge seat 301, the cover plate 40 acts on the turnover part 702 of the trigger element to overcome the action force of the first elastic member 703, so that the bent part 704 is turned over and then separated from the limiting groove 606, so that the limiting element is in the unlocked state. When the limiting element is in the unlocked state, the movable part 601 can move to the second position towards the fixed part 602 under the action of the cartridge assembly 303. More specifically, when the cartridge assembly 303 is installed in the cartridge seat 301, the proximal end of the cartridge assembly 303 first contacts the distal end inclined surface of the movable part 601, when the cartridge assembly 303 is pressed downward, the proximal end of the cartridge assembly 303 slides along the distal end inclined surface of the movable part 601 and pushes the distal end of the movable part 601 to move to the second position towards the fixed part 602; the second elastic member 604 is energized during the movement of the movable part 601.When the staple cartridge assembly 303 is removed from the staple cartridge seat 301, the movable part 601 can return from the second position to the first position under the action of the second elastic member 604, wherein the second elastic member 604 is a spring.

[0068] In this embodiment, the triggering element can lock the limiting element in the first position, so that the limiting element is in a locked state. When the triggering element is triggered by the cover plate, the limiting element changes from the locked state to the unlocked state. At this time, space is made up under the action of the staple cartridge assembly, and the staple cartridge can be inserted. The cooperation between the triggering element and the limiting element, and the cooperation between the cover plate and the triggering element, ensures that the staple cartridge assembly (without the cover plate) cannot be inserted into the staple cartridge seat, thereby effectively avoiding the situation where the tissue cannot be anastomosed or the tissue is cut without suturing, thus improving the safety of the operation. In addition, the cover plate can be fully utilized. It can not only protect the staple cartridge assembly, but also cooperate with the triggering element to install the staple cartridge assembly, realizing a dual-purpose cover plate.

[0069] like Figures 15 to 17 As shown, this is a stapler according to the third embodiment of the present invention. The differences between the third embodiment and the second embodiment will be described below.

[0070] Unlike the second embodiment, in this embodiment, the movement of the trigger element after being triggered by the cover plate is a translational movement, which is smoother and more convenient than the second embodiment.

[0071] In this embodiment, one end of the first elastic element 904 of the triggering element is connected to one side wall of the pin seat 303, and the other end is connected to the trigger body 901 of the triggering element. The trigger body 901 extends along one side wall of the pin seat 303 towards the other side wall of the pin seat 303. A protrusion 903 is provided at the bottom of the trigger body 901, and the proximal end face of the trigger body 901 is an inclined surface 902. The limiting element includes a second elastic element 804, a fixed part 802, and a movable part 801. A groove 803 is provided on the top surface of the movable part 801 of the limiting element, and the groove 803 is provided through the groove in a direction perpendicular to the side wall of the pin seat 301. The protrusion 903 at the bottom of the trigger body 901 enters the groove 803 to lock the limiting element in a first position. When the staple cartridge assembly 303 with cover plate 40 installed is inserted into the staple cartridge seat 301, cover plate 40 contacts the inclined surface 902 of trigger body 901. As the staple cartridge assembly 303 is inserted, it presses the trigger body 901 towards the side wall of the staple seat 301, and the protrusion 903 at the bottom of the trigger body 901 gradually disengages from the groove 803, causing the limiting element to be in the unlocked state. When the limiting element is in the unlocked state, its movable part 801 can move towards the fixed part 802 to the second position under the action of the staple cartridge assembly 303.

[0072] It should be understood that although the present specification describes only a single embodiment, the disclosure of features or combinations of features in this specification is not to be construed as an exclusion of the same from other embodiments. It is therefore contemplated that the features and combinations thereof described throughout this specification can be subject to alteration without departing from the scope or spirit of the present disclosure.

[0073] The above detailed description merely describes a specific implementation of the application, and the description is not intended for restricting the protection scope of the application. Any equivalent implementation or change made without departing from the spirit of the application should be included in the protection scope of the application.

Claims

1. An anastomat comprising a cartridge assembly, a cartridge seat, and a cover; the cover is detachably mounted on the cartridge assembly; the cartridge seat comprises a mounting space for mounting the cartridge assembly, and the cartridge assembly is detachably mounted in the mounting space; characterized in that, The safety device comprises a limiting element and a triggering element; the triggering element and the limiting element are connected; the limiting element has a first position and a second position; when in the first position, the limiting element is at least partially located in the installation space; when in the second position, the limiting element is located outside the installation space; the triggering element is triggered under the action of the cover plate; when the triggering element is triggered, the limiting element moves from the first position to the second position under the action of the triggering element and / or the staple cartridge assembly.

2. The anastomat of claim 1, wherein The safety device further comprises a pivot shaft, and the triggering element and the limiting element are pivotally installed on the staple cartridge seat via the pivot shaft; the triggering element drives the limiting element to pivotally move from the first position to the second position under the action of the cover plate.

3. The anastomosis device according to claim 2, wherein The limiting element and the triggering element are integrally formed and jointly constitute a body of the safety device, and the body is provided with a shaft hole; the pivot shaft passes through the shaft hole.

4. The anastomat of claim 2 wherein, The triggering element is provided with a shaft hole, the pivot shaft passes through the shaft hole, and the proximal end of the limiting element is connected to the distal end of the triggering element.

5. The anastomat of claim 3 or 4, wherein The triggering element and the limiting element are arranged at an angle.

6. The anastomat of claim 2 wherein, When in the first position, the limiting element abuts against the staple cartridge seat, and the triggering element is arranged at an angle with the staple cartridge seat.

7. The anastomat of claim 6 wherein, The limiting element comprises a bottom surface and a side surface connected to the distal end of the bottom surface, the bottom surface abuts against the staple cartridge seat when in the first position, and the side surface is at least partially arranged in an inclined manner.

8. The anastomat of claim 6 wherein, When in the second position, the limiting element abuts against the staple cartridge assembly, and the triggering element abuts against the staple cartridge seat.

9. The anastomat of claim 1 wherein, When in the first position, the triggering element locks the limiting element, so that the limiting element is in a locked state; when the triggering element is triggered by the cover plate, the limiting element changes from the locked state to an unlocked state; when the limiting element is in the unlocked state, it can move from the first position to the second position under the action of the staple cartridge assembly.

10. The anastomat of claim 9, wherein, The triggering element comprises a triggering body and a first elastic member, one end of the first elastic member is connected to the staple cartridge seat, and the other end is connected to the triggering body; the triggering body partially enters the limiting element when in the first position, so that the limiting element is in the locked state; the triggering body can move away from the limiting element under the action of the cover plate, so that the limiting element is in the unlocked state.

11. The anastomat of claim 10 wherein, The limiting element comprises a second elastic member, a fixed part and a movable part, the fixed part is connected to the staple cartridge seat, one end of the second elastic member is connected to the fixed part, and the other end is connected to the movable part; when the limiting element is in the unlocked state, the movable part can move towards the fixed part under the action of the staple cartridge assembly to move from the first position to the second position.

12. The anastomat of claim 1 wherein, The cover plate comprises a first cover plate and a second cover plate extending downward from the proximal end of the first cover plate; the second cover plate is arranged at an angle with the first cover plate; the triggering element is triggered under the action of the second cover plate.

13. The anastomat of claim 1 wherein, The proximal end of the cover plate exceeds the proximal end of the cartridge assembly when the cover plate is in the mounted state.

14. The anastomat of claim 1 wherein, The cartridge seat comprises a slot arranged at the bottom thereof, the slot being used for the cutting knife assembly of the stapler to pass through; the stapler has two safety devices, and the two safety devices are symmetrically arranged on two sides of the slot.

15. The anastomat of claim 1 wherein, The first limiting part is a protrusion, and the second limiting part is a groove; or the first limiting part is a groove, and the second limiting part is a protrusion.

16. The anastomosis device according to claim 15, wherein The cartridge seat is provided with a safety device, the safety device comprises a limiting element and a triggering element; the triggering element and the limiting element are connected; the limiting element has a first position and a second position; in the first position, the limiting element is at least partially located in the mounting space; in the second position, the limiting element is located outside the mounting space; when the triggering element is triggered under the action of the cover plate which is detachably mounted on the cartridge assembly, the limiting element moves from the first position to the second position under the action of the triggering element and / or the cartridge assembly.

17. An anastomat comprising a staple cartridge seat; the staple cartridge seat comprising a mounting space for mounting a staple cartridge assembly; characterized in that, The safety device further comprises a pivot shaft, and the triggering element and the limiting element are pivotally mounted on the cartridge seat through the pivot shaft; when the triggering element is triggered, the limiting element is pivotally moved from the first position to the second position.

18. The anastomosis device according to claim 17, wherein In the first position, the triggering element locks the limiting element, so that the limiting element is in a locked state; when the triggering element is triggered, the limiting element changes from the locked state to an unlocked state; when the limiting element is in the unlocked state, it can move from the first position to the second position under the action of the cartridge assembly.

19. The anastomosis device according to claim 17, wherein ​

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