D-shaped nail anastomat

Abstract

The application relates to an anastomat for D-shaped nails, which is formed by an anastomosis pressing plate and an anastomosis fixing seat to form a gap for placing the tissue to be anastomosed, and a push block is used to eject the D-shaped nails. A first driving mechanism is used to drive the main part through a transmission part to move the anastomosis fixing seat in a second direction, so that the first step of clamping the tissue to be anastomosed is realized; a second driving mechanism is used to drive the push block to enter the nail magazine in a first direction, so that the second step of puncturing the tissue by the D-shaped nails is realized; finally, the first driving mechanism is used to drive the anastomosis moving seat to move in the first direction, so that the third step of extruding and closing the D-shaped nails is realized. Therefore, the anastomat has the advantages of relatively small instrument conveying profile, better operation flexibility, relatively small firing resistance and relatively stable forming.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, and in particular relates to a D-type stapler. Background Technology

[0002] In gastrointestinal surgery, digestive tract reconstruction is required after the removal of diseased tissue. Currently, commonly used reconstruction methods include manual suturing, high-frequency electrosurgical welding, and mechanical anastomosis.

[0003] Patent CN103156657A discloses an anvil assembly for a linear stapler, including an anvil support and an anvil. A fixing structure is provided between the front end of the anvil support and the front end of the anvil to lock their positions. This invention achieves precise positioning of the anvil by setting a groove in the middle of the anvil support, combined with the convex wing at the tail end of the anvil and the fixing structure at the front end. The main purpose of this structural design is to ensure that during the firing of the stapler, the forming groove on the anvil is highly aligned with the staple ejection hole on the staple cartridge, thereby ensuring that the titanium staple can accurately enter the forming groove under pressure, ultimately forming a good "B"-shaped closure, ensuring hemostasis and connection strength at the anastomosis site.

[0004] Patent CN106388894A discloses a novel cutting and anastomosis device and its working method. The device includes a staple cartridge, an anvil (staple seat), and a clamping thickness adjustment mechanism. During operation, pushing the firing button moves the cutting blade and the staple pusher slider forward synchronously, forcing the staples out of the cartridge. The extruded staples, under the force of the pusher, penetrate the biological tissue, contact the staple forming groove on the anvil, and are forced to bend and deform. The patent details the entire process of the staples, guided by the forming groove, having their two legs curl inwards, ultimately clamping together within the tissue to form a "B"-shaped structure, thereby achieving tissue clamping and suturing.

[0005] The solution in patent CN103156657A, while optimizing alignment accuracy through improvements to the anvil's fixation structure, is still limited by the initial U-shaped form of traditional B-type staples. This form forces the staple cartridge and anvil of the stapler to have a relatively wide accommodating space to accommodate both staple legs, resulting in a large overall instrument delivery profile. During minimally invasive surgery, this large profile makes it difficult for the instrument to penetrate narrow anatomical spaces (such as the low rectum or esophagus), leading to operational difficulties and severe obstruction of the field of vision.

[0006] The patent application with publication number CN106388894A, although employing a push-screw slider drive mechanism, still relies on bending two metal screw legs inwards in a large B-shape simultaneously. This deformation method physically requires overcoming extremely high material yield strength, thus necessitating significant firing resistance. In actual surgery, uneven tissue thickness or calcification can easily lead to uneven force on the screw legs, resulting in inconsistent shaping and incomplete closure, severely impacting the sealing safety of the anastomosis. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a D-type stapler to overcome one or more of the defects in the prior art, such as large instrument delivery profile, poor operational flexibility, high firing resistance, and insufficient forming stability.

[0008] The technical solution adopted by this invention to solve its technical problem is:

[0009] A D-type stapler, comprising:

[0010] The matching fixing seat is used to accommodate the staple cartridge, and several D-shaped staples are arranged in the staple cartridge along the first direction;

[0011] The matching movable seat can slide along the first direction;

[0012] An anastomosis clamp is mounted on the anastomosis movable seat and is slidable relative to the anastomosis movable seat in a second direction, which is perpendicular to the first direction; the anastomosis clamp includes a main body and a transmission part; a gap is formed between the main body and the anastomosis fixing seat for inserting the tissue to be anastomosed; the anastomosis clamp has a receiving groove for embedding the D-shaped staple;

[0013] A pusher block, installed on the anastomosis fixation seat, can move in a first direction to enter the staple cartridge. When one side of the pusher block presses against one side of the D-shaped staple, the D-shaped staple can be pushed out to puncture the tissue to be anastomosed and enter the receiving groove.

[0014] The first driving mechanism is capable of driving the main body to move along the second direction toward the matching fixing seat through the transmission part, and driving the matching moving seat to move along the first direction;

[0015] The second drive mechanism can drive the pusher block to enter the staple cartridge along the first direction.

[0016] In an optional embodiment, the D-type stapler further includes a gear mounted on the anastomosis moving seat; the transmission portion has a rack surface that matches the gear and extends in a second direction;

[0017] The first drive mechanism includes a closing pull block rack, which is capable of reciprocating along a first direction and meshes with the gear.

[0018] In an optional embodiment, the D-type stapler further includes a coupling assembly rotatably connected to the stapler fixation base;

[0019] When the coupling assembly rotates to the first angle, the matching movable seat can be coupled to the matching fixed seat through the coupling assembly; the coupling assembly can remain at the first angle when no external force is applied.

[0020] When the coupling component rotates to the second angle, the matching moving seat and the matching fixed seat are decoupled.

[0021] In an optional embodiment, the D-type stapler further includes:

[0022] A push block base is fixed to the push block;

[0023] The decoupling push rod is connected to the push block seat and can drive the push block seat to move along the first direction;

[0024] The push block has a protrusion on one side. When the protrusion moves along the first direction, it can squeeze one side of the coupling component to drive the coupling component to rotate from the first angle to the second angle.

[0025] In an optional embodiment, the D-type stapler further includes a pressure plate sleeve, which is fitted onto the main body and slidably connected to the stapler fixing seat, and is capable of sliding in a second direction.

[0026] In an optional embodiment, the D-type stapler further includes:

[0027] An operating grip, the operating grip being for human hand gripping and operation;

[0028] An instrument tube extends along a first direction and is used to connect the operating grip to the mating fixation seat. The first drive mechanism and the second drive mechanism are partially disposed inside the instrument tube.

[0029] In an optional embodiment, the first drive mechanism includes:

[0030] A finger-operated trigger is mounted on one side of the operating grip and can move in a first direction for hand operation.

[0031] A lever, the proximal end of which is connected to the finger trigger and can move with the finger trigger; the distal end of which is connected to the closing pull block rack.

[0032] A first spring, installed inside the instrument tube, abuts against the anastomosis moving seat to provide elastic force for the anastomosis moving seat to return to its original position.

[0033] In an optional embodiment, the second drive mechanism includes:

[0034] An electric actuator assembly, installed within the operating grip, is capable of extending and retracting in a first direction;

[0035] A motor, installed inside the operating grip, is used to drive the electric actuator assembly to extend, remain stationary, or retract.

[0036] The push rod has its distal end connected to the push block via a decoupling push rod, and its proximal end directly connected to the electric actuator assembly or connected to the electric actuator assembly via a coupling.

[0037] In an optional embodiment, the D-type stapler further includes:

[0038] A limiting buckle is rotatably mounted inside the operating grip, and the limiting buckle can be rotated to a first position or a second position; the limiting buckle has a protrusion, and when the limiting buckle reaches the first position, the protrusion restricts the travel of the finger trigger.

[0039] A spring clip is fixed to the limiting buckle to keep the limiting buckle in the first position when no external force is applied.

[0040] One end of the limiting buckle is located on the moving path of the coupling or push rod, so that it can be squeezed to reach the second position when the coupling or push rod moves.

[0041] In an optional embodiment, the D-type stapler further includes a trigger locking spring, which is installed in the operating grip and located on the side of the finger-operated trigger. The trigger locking spring can fit against the finger-operated trigger when not subjected to external force.

[0042] The trigger locking spring can engage with the finger-operated trigger at a preset position to lock the finger-operated trigger when it has moved to a preset stroke.

[0043] The beneficial effects of this invention are as follows: This invention provides a D-type stapler, which forms a gap for inserting the tissue to be stapled by an anastomosis pressure plate and an anastomosis fixation seat, and the D-type staple is ejected by a pusher block. A first driving mechanism, through a transmission part, drives the main body to move along a second direction toward the anastomosis fixation seat, achieving the first step of clamping the tissue to be stapled; a second driving mechanism drives the pusher block along a first direction into the staple cartridge, achieving the second step of D-type staple puncture of the tissue; finally, the first driving mechanism drives the anastomosis moving seat to move along a first direction, achieving the third step of D-type staple compression closure. Therefore, this invention provides a stapler with a relatively small instrument delivery profile, good operational flexibility, relatively low firing resistance, and relatively stable stapling formation. Attached Figure Description

[0044] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0045] Figure 1 This is an external schematic diagram of the D-type stapler structure in this embodiment;

[0046] Figure 2 This is a schematic diagram of the internal structure of the stapler for the D-type staple in this embodiment;

[0047] Figure 3 This is a schematic diagram of the end-effector structure in this embodiment;

[0048] Figure 4 This is a schematic diagram showing the arrangement of the D-type staples inside the stapler in this embodiment;

[0049] Figure 5 This is a schematic diagram of the state when the D-type stapler clamps the tissue in this embodiment;

[0050] Figure 6 This is a schematic diagram of the state of the tissue after the D-type stapler punctures the tissue in the stapler of this embodiment;

[0051] Figure 7 This is a schematic diagram of the coupling component in the coupling state in this embodiment;

[0052] Figure 8 This is a schematic diagram of the coupling components in this embodiment being in a decoupled state;

[0053] Figure 9 This is a schematic diagram showing the movable state of the matching moving seat after the coupling components in this embodiment are decoupled.

[0054] The attached figures are labeled as follows:

[0055] 1. Charging port;

[0056] 2. Battery;

[0057] 3. Motor; 3-1. Switch;

[0058] 4. Electric actuator assembly;

[0059] 5. Shrapnel;

[0060] 6. Finger-operated trigger;

[0061] 7. Trigger locking spring clip;

[0062] 8. Couplings;

[0063] 9. Limiting buckle; 9-1. Protrusion;

[0064] 11. Push block rod;

[0065] 12. Instrument tube;

[0066] 13. Pull rod;

[0067] 14. The first spring;

[0068] 15. End-of-line execution component;

[0069] 16. Push block seat; 16-1. Protrusion;

[0070] 17. Decoupling push rod;

[0071] 18. Matching movable seat;

[0072] 19. Close the pull block rack;

[0073] 20. Gear;

[0074] 21. Coupling component; 21-1. Hook; 21-2. Elastic element;

[0075] 22. Fitting pressure plate; 22-1. Main body; 22-2. Transmission part; 22-3. Receiving groove;

[0076] 23. Pressure plate sleeve;

[0077] 24. Fitting fixation seat;

[0078] 25. Push the block;

[0079] 26. Pinned storage;

[0080] 27. D-type nail. Detailed Implementation

[0081] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0082] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0083] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0084] In the accompanying drawings, for clarity, the length, area, volume, gap dimensions, and relative dimensions of components, as well as the included angles and relative positional relationships between components, may be exaggerated. The same reference numerals denote the same elements throughout the drawings.

[0085] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0086] This embodiment provides a D-type stapler, such as Figure 1-5 As shown, it includes:

[0087] The stapler 24 is used to accommodate the staple cartridge 26, and a number of D-shaped staples 27 are arranged in the staple cartridge 26 along the first direction.

[0088] The matching movable seat 18 is capable of sliding along the first direction;

[0089] The anastomosis clamp 22 is mounted on the anastomosis moving seat 18 and is slidable relative to the anastomosis moving seat 18 in a second direction, which is perpendicular to the first direction. The anastomosis clamp 22 includes a main body part 22-1 and a transmission part 22-2. A gap is formed between the main body part 22-1 and the anastomosis fixing seat 24 for inserting the tissue to be anastomosed. The anastomosis clamp 22 has a receiving groove 22-3 for inserting D-shaped staples 27.

[0090] Push block 25, installed on anastomosis fixation seat 24, can move in the first direction to enter staple cartridge 26. When one side of push block 25 presses one side of D-type staple 27, D-type staple 27 can be pushed out to puncture the tissue to be anastomosed and enter the receiving groove 22-3.

[0091] The first drive mechanism can drive the main body 22-1 to move along the second direction toward the mating fixed seat 24 via the transmission part 22-2, and drive the mating moving seat 18 to move along the first direction;

[0092] The second drive mechanism can drive the pusher 25 to enter the staple cartridge 26 along the first direction.

[0093] like Figure 3 As shown, the D-type nail 27 described in this embodiment is a D-shaped medical anastomosis nail with a needle tip at one end for puncturing tissue. The D-type nail 27 is made of a medical-grade malleable metal material, such as biodegradable magnesium alloy, so that it can be deformed and closed under pressure to achieve the anastomosis function. Figure 4 As shown, the D-type nail 27 is stored in the nail cartridge 26, which has a certain fixing effect on it.

[0094] The D-type stapler of this embodiment forms a gap for inserting the tissue to be anastomosed by an anastomosis pressure plate 22 and an anastomosis fixation seat 24, and the pusher block 25 ejects the D-type staple. The first driving mechanism, via the transmission part 22-2, moves the main body 22-1 along the second direction toward the anastomosis fixation seat 24, achieving the first step of clamping the tissue to be anastomosed. The second driving mechanism then moves the pusher block 25 along the first direction into the staple cartridge 26, achieving the second step of D-type staple puncture of the tissue. Finally, the first driving mechanism moves the anastomosis moving seat 18 along the first direction, achieving the third step of compressing and closing the D-type staple. Therefore, this invention provides an anastomosis device with a relatively small instrument delivery profile, good operational flexibility, relatively low firing resistance, and relatively stable formation.

[0095] The operation process and implementation principle of the D-type stapler in this embodiment include:

[0096] Step 1 - Clamp, as Figure 3 As shown, the gap formed by the anastomosis clamping plate 22 and the anastomosis fixation seat 24 allows for the insertion of the tissue to be anastomosed. The first driving mechanism, via the transmission part 22-2, drives the main body part 22-1 to move along the second direction toward the anastomosis fixation seat 24. Figure 5 , Figure 6 As shown, the tissue to be anastomosed is clamped.

[0097] Step 2 - D-type nail puncture of tissue, such as Figure 3As shown, after the first step is completed, the pusher 25 is located outside the proximal end of the staple cartridge 26 (in this embodiment, the direction closer to the operator is considered the proximal end, and the direction farther from the operator is considered the distal end). The second drive mechanism drives the pusher 25 to enter the staple cartridge 26 distally along the first direction. Since the contour of the pusher 25 is designed according to the shape of the D-shaped staple 27, when the pusher 25 squeezes the D-shaped staple 27, it can deflect the D-shaped staple 27, and its tip first protrudes from the staple cartridge 26, completing the puncture of the tissue. Subsequently, with further squeezing by the pusher 25, the entire D-shaped staple 27 is squeezed out of the staple cartridge 26 and completely separated from it. When the pusher 25 reaches its maximum travel, as... Figure 6 As shown, all the D-shaped nails 27 in the nail cartridge 26 were squeezed out, completing the tissue puncture.

[0098] Step 3 - Compression closure of the D-shaped nail: After completing step 2 above, as follows... Figure 6 As shown, the upper side of the D-shaped staple 27 enters the receiving groove 22-3 of the anastomosis pressure plate 22. When the first driving mechanism drives the anastomosis moving seat 18 to move proximally along the first direction, the anastomosis moving seat 18 indirectly drives the anastomosis pressure plate 22 to move proximally along the first direction. The D-shaped staple 27 is flattened by the side wall of the receiving groove 22-3 and closely adheres to the anastomosed tissue. The D-shaped staple 27 is deformed into a closed flat shape, realizing tissue anastomosis.

[0099] In an alternative embodiment, such as Figure 1 As shown, the D-type stapler in this embodiment further includes:

[0100] Operating grip 100, the operating grip 100 is for human hand to hold and operate;

[0101] The instrument tube 12 extends along a first direction and is used to connect the operating handle 100 and the anastomosis fixation seat 24. The first drive mechanism and the second drive mechanism are partially disposed inside the instrument tube 12.

[0102] This embodiment facilitates manual operation by setting up the handle 100 and the instrument tube 12, and allows the end effector 15 (which includes components such as push block 25, anastomosis pressure plate 22, anastomosis moving seat 18, and anastomosis fixing seat 24) to extend to a position away from the operator, which meets the actual surgical needs.

[0103] In an alternative embodiment, such as Figure 3 As shown, the D-type stapler also includes a gear 20, which is mounted on the stapler moving seat 18; the transmission part 22-2 has a rack surface that matches the gear 20 and extends in a second direction;

[0104] The first drive mechanism includes a closing pull block rack 19, which is capable of reciprocating along a first direction and meshes with a gear 20.

[0105] In this embodiment, the closed pull block rack 19 is able to move linearly. In conjunction with the gear 20 and the transmission part 22-2, the matching pressure plate 22 can be driven to move in the second direction, so that the first drive mechanism can effectively control the matching pressure plate 22 located at the far end and realize the conversion of the movement direction.

[0106] It should be noted that in the first step of the above operation process, the closing pull block rack 19 can drive the anastomosis pressure plate 22 to move in the second direction, while in the third step of the above operation process, the closing pull block rack 19 can drive the anastomosis pressure plate 22 to move in one direction. The two are not contradictory, because in the third step of the above operation process, as the anastomosis pressure plate 22 moves to its limit in the second direction, the anastomosis pressure plate 22 will be unable to continue moving, and the corresponding gear 20 will not be able to rotate. The gear 20 and the anastomosis moving seat 18 are equivalent to a whole. The closing pull block rack 19 applies a pulling force in the first direction to the anastomosis moving seat 18, causing it to move in the first direction, which indirectly causes the anastomosis pressure plate 22 to move in the first direction.

[0107] In an alternative embodiment, such as Figure 3 As shown, the D-type stapler also includes a coupling assembly 21, which is rotatably connected to the stapler fixation base 24;

[0108] like Figure 7 As shown, when the coupling component 21 rotates to the first angle, the matching moving seat 18 can be coupled to the matching fixed seat 24 through the coupling component 21 to restrict the movement of the matching moving seat 18; the coupling component 21 can remain at the first angle when there is no external force.

[0109] like Figure 8 As shown, when the coupling component 21 rotates to the second angle, the matching moving seat 18 is decoupled from the matching fixed seat 24, so that the movement of the matching moving seat 18 is unrestricted.

[0110] like Figure 9 As shown, when the anastomosis moving seat 18 is decoupled from the anastomosis fixing seat 24, the moving anastomosis moving seat 18 can move it away from the anastomosis fixing seat 24, indirectly driving the anastomosis pressure plate 22 installed on it to move proximally along the first direction.

[0111] In this embodiment, the coupling component 21 is designed to flexibly couple or decouple the anastomosis moving seat 18 and the anastomosis fixing seat 24, so that the first drive mechanism of the D-type staple stapler in this embodiment can perform different drive modes at different stages of use.

[0112] In an alternative embodiment, such as Figure 2 , Figure 3 As shown, the D-type stapler also includes:

[0113] Push block seat 16 is fixed to push block 25 and is used to guide the trajectory of push block 25.

[0114] The decoupling push rod 17 is connected to the push block seat 16 and can drive the push block seat 16 to move along the first direction; the decoupling push rod 17 extends along the first direction to facilitate the transmission of motion from the proximal end to the distal end.

[0115] like Figure 7 As shown, the push block seat 16 has a protrusion 16-1 on one side, as... Figure 8 As shown, when the protrusion 16-1 moves along the first direction, it can squeeze one side of the coupling component 21 to drive the coupling component 21 to rotate from the first angle to the second angle.

[0116] In this embodiment, the decoupling action of the coupling component 21 occurs during the movement of the pusher block 16, specifically after the movement of the pusher block 25 in the second step – the D-type staple puncture tissue step. This design ensures that the decoupling occurs precisely after the completion of the second step and before the start of the third step, facilitating the first drive mechanism to move the anastomosis moving seat 18 proximally along the first direction, thus meeting operational requirements.

[0117] In an alternative embodiment, such as Figures 7-9 As shown, the coupling component 21 includes a component body, a hook 21-1 and an elastic element 21-2. The hook 21-1 is used to engage with the corresponding position of the matching moving seat 18 to fix the matching moving seat 18. The elastic element 21-2 is used to reset the coupling component 21 after rotation through its own elasticity. The elastic element 21-2 can be a spring sheet, torsion spring or coil spring, etc.

[0118] In an alternative embodiment, such as Figures 3-5 As shown, the D-type stapler also includes a pressure plate sleeve 23, which is fitted onto the main body 22-1 and slidably connected to the stapler fixing seat 24, and can slide in the second direction. The pressure plate sleeve 23 can increase the stability of the movement of the stapler pressure plate 22.

[0119] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, the first drive mechanism includes:

[0120] A finger-operated trigger 6 is mounted on one side of the operating grip 100 and can move in the first direction for manual operation.

[0121] Pull lever 13, the proximal end of pull lever 13 is connected to trigger 6, and can move with trigger 6; such as Figure 3 As shown, the distal end of the lever 13 is connected to the closing lever rack 19; that is, this structure facilitates the finger-operated trigger 6 to control the movement of the closing lever rack 19.

[0122] The first spring 14, installed inside the instrument tube 12, abuts against the anastomosis moving seat 18 to provide a resetting force for the anastomosis moving seat 18. In this embodiment, resetting refers to the first spring 14 providing a resetting force to bring the anastomosis moving seat 18 closer to the anastomosis fixing seat 24 after the anastomosis moving seat 18 is decoupled from the anastomosis fixing seat 24, so that after the operation is completed, the anastomosis moving seat 18 can be returned to its original position and recoupled to the anastomosis fixing seat 24.

[0123] In an alternative embodiment, such as Figure 2 As shown, the second drive mechanism includes:

[0124] The electric actuator assembly 4 is installed inside the operating handle 100 and is capable of telescopic movement in a first direction;

[0125] Motor 3, installed in operating handle 100, is used to drive electric actuator assembly 4 to extend, stop, or retract.

[0126] Push block rod 11, such as Figure 3 As shown, the distal end of push rod 11 is connected to push block 25 via decoupling push rod 17, as... Figure 2 As shown, the proximal end of the push rod 11 is directly connected to the electric actuator assembly 4 or connected to the electric actuator assembly 4 via the coupling 8.

[0127] In this embodiment, the push rod 11 transmits the thrust from the near end to the far end. The motor 3 and the electric push rod assembly 4 drive the push block 25, ensuring that the push block 25 receives a sufficiently large and stable thrust, thus guaranteeing that the D-shaped pin 27 receives a sufficiently large thrust during the mating operation. The coupling 8 reduces the installation accuracy requirements of the electric push rod assembly 4; it is understandable that the coupling 8 is unnecessary when the installation accuracy is sufficient.

[0128] In an alternative embodiment, such as Figure 2 As shown, the D-type stapler also includes:

[0129] The limit buckle 9 is rotatably installed in the operating grip 100. The limit buckle 9 can be rotated to a first position or a second position. The limit buckle 9 has a protrusion 9-1. When the limit buckle 9 reaches the first position, the protrusion 9-1 restricts the travel of the finger trigger 6.

[0130] The spring piece 5 is fixed to the limit buckle 9 to keep the limit buckle 9 in the first position when it is not subjected to external force;

[0131] One end of the limit buckle 9 is located on the moving path of the coupling 8 or the push rod 11 so that it can be squeezed to reach the second position when the coupling 8 or the push rod 11 moves.

[0132] In this embodiment, the function of the limiting buckle 9 is to ensure that the finger trigger 6 remains in the position when it contacts the protrusion 9-1 in the first step of the above-mentioned operation process, at which point the corresponding anastomosis pressure plate 22 just reaches the height of clamping the tissue. In the second step of the above-mentioned operation process, with the action of the second drive mechanism, the limiting buckle 9 is compressed and reaches the second position when the coupling 8 or push rod 11 moves, and the finger trigger 6 is no longer restricted and can continue to move. That is, in the third step of the above-mentioned operation process, as the finger trigger 6 moves further proximally, the anastomosis moving seat 18 in the decoupled state moves proximally, driving the anastomosis pressure plate 22 to move, completing the compression of the D-shaped staple 27. The function of the spring piece 5 is to help the limiting buckle 9 reset.

[0133] In an alternative embodiment, such as Figure 2 As shown, the D-type stapler also includes a trigger locking spring 7, which is installed inside the operating grip 100 and located on the side of the finger-operated trigger 6. When the trigger locking spring 7 is not subjected to external force, it can fit against the finger-operated trigger 6.

[0134] The trigger locking spring 7 can engage with the finger-operated trigger 6 at a preset position to lock the finger-operated trigger 6 when it has moved to a preset stroke.

[0135] In this embodiment, the trigger locking spring 7 assists in locking the finger-operated trigger 6. The above operation process mentions that the first step and the third step both require the action of the first drive mechanism. That is, the operation of the finger-operated trigger 6 includes two stages, corresponding to two points of the stroke. The first point is when the finger-operated trigger 6 contacts the protrusion 9-1, and at the same time, the trigger locking spring 7 engages with the preset position of the finger-operated trigger 6, reducing the difficulty of operation for the operator.

[0136] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, the D-type stapler also includes a battery 2 and a charging interface 1 installed within the operating handle 100. The battery 2 powers the motor 3, and the charging interface 1 is the interface for connecting the battery 2 to a charger. Figure 1 As shown, the D-type stapler also includes a switch 3-1 mounted on the outer wall of the operating handle 100 for controlling the various gears of the motor 3.

[0137] This invention fundamentally changes the initial implantation form of anastomotic staples by replacing traditional B-type metal staples with a D-type staple structure made of biodegradable magnesium alloy. Because the D-type staple eliminates the need for the large legs on both sides of traditional anastomotic staples, the lateral footprint of the staple cartridge is significantly reduced, thereby drastically lowering the overall delivery profile of the end-effector of the anastomotic device. This compact design allows the instrument to pass more smoothly through narrow anatomical passages (such as the low rectum or esophagus) during minimally invasive surgery, effectively reducing compression and damage to surrounding tissues during instrument placement, and significantly improving the adaptability and safety of minimally invasive surgery.

[0138] This invention designs a "rotational puncture-fracture separation-axial push forming" mechanism, combining the unique physical brittleness of magnesium alloy to solve the problems of high firing resistance and unstable forming in traditional staplers. Utilizing the brittleness of magnesium alloy, the staple tail hook automatically fractures and separates the instant it is flipped into position, simplifying the staple removal structure. Furthermore, the deformation method, which converts axial thrust into downward pressure, significantly reduces the required mechanical firing force compared to traditional double-leg bending forming. This not only ensures a high degree of consistency in staple forming height across tissues of varying thicknesses, avoiding the risks of B-type staples or incomplete closure, but also ensures the sealing effect and connection strength of the anastomosis.

[0139] Furthermore, this stapler utilizes the biodegradable properties of magnesium alloy, eliminating the clinical risks associated with permanent foreign body residue. Postoperatively, the staples are gradually absorbed by the body, avoiding the foreign body granulomas, chronic inflammatory reactions, and interference with CT / MRI imaging that can occur with long-term retention of titanium alloy staples.

[0140] 1. This invention avoids the traditional design of staplers that requires reserved space to accommodate the two legs of the B-type staple, and innovatively designs a D-type staple and its matching axial delivery mechanism. Because the D-type staple has no laterally extending legs in its initial state, the ineffective area occupied by the staple cartridge cross-section is significantly reduced, resulting in a substantial reduction in the overall delivery profile of the end effector. This design allows the instrument to more easily pass through narrow anatomical passages (such as the low rectum or esophagus) in minimally invasive surgery, reducing instrument insertion resistance and minimizing unnecessary compression and damage to surrounding healthy tissues.

[0141] 2. This invention utilizes the biodegradability of magnesium alloy materials, solving the problem of permanent foreign body residue associated with traditional titanium alloy staples. Magnesium alloy is completely absorbed by the body post-surgery, thoroughly eliminating granulomas and imaging artifacts caused by permanent metallic foreign bodies.

[0142] 3. This invention utilizes the physical brittleness of magnesium alloy to solve the problem of difficult demolding of traditional anastomotic staples. An automatic staple removal mechanism based on "overload fracture" is designed. At the instant the D-type staple flips and punctures into place, its tail hook automatically fractures due to the force exceeding the material's yield strength, achieving instantaneous separation of the anastomotic staple from the delivery mechanism. This "brittle fracture" design greatly simplifies the mechanical structure, avoids the complex demolding mechanisms required for traditional metal staples due to their excessive toughness, and improves the operational reliability of the instrument.

[0143] 4. This invention overcomes the limitations of traditional staplers with a fixed "forming height." Through the coordinated design of the anastomosis moving seat 18 and the pull rod 13, it achieves flexible adjustment of the D-screw forming height (i.e., tissue compression tightness). The surgeon can fine-tune the jaw closure gap before firing, based on the actual tissue thickness and pathological condition during surgery. This design allows the final closure height of the D-screw to dynamically adapt to individual differences among patients, avoiding tissue ischemia and necrosis caused by excessive compression, and preventing anastomotic bleeding caused by excessively loose compression, thereby significantly improving the healing quality of the anastomosis.

[0144] 5. This invention employs a hybrid drive strategy combining "mechanical manual clamping" and "electric automatic firing." The mechanical transmission retains the doctor's tactile feedback on tissue locking, ensuring reliable clamping; while the constant and stable thrust provided by the electric firing effectively prevents the brittle magnesium alloy nails from breaking due to uneven manual force, thereby ensuring shaping stability and surgical success rate.

[0145] 6. This invention proposes a novel "rotational puncture-axial push forming" approach: the D-type nail first achieves vertical puncture through a 90° rotation, then the axial thrust of the anastomosis pressure plate 22 presses against one end of the D-type nail, converting the horizontal thrust into a vertical downward pressure on the nail body, forcing it to complete flattening closure. This force conversion and step-by-step deformation mechanism significantly disperses the instantaneous firing resistance, making the anastomosis action gentler and smoother. Simultaneously, compared to the point contact of traditional B-type nails, the formed surface contact can more evenly distribute the anastomosis tension, effectively reducing the risk of the nail body cutting fragile tissues.

[0146] 7. This patent separates the tissue puncture action of the suture staple from the closure action of the suture staple, which can completely ensure reliable and effective closure.

[0147] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A D-type stapler, characterized in that, include: The staple holder (24) is used to accommodate the staple cartridge (26), and several D-shaped staples are arranged in the staple cartridge (26) along the first direction; The matching movable seat (18) is capable of sliding along the first direction; An anastomosis pressure plate (22) is mounted on the anastomosis moving seat (18) and is slidable relative to the anastomosis moving seat (18) in a second direction perpendicular to the first direction; the anastomosis pressure plate (22) includes a main body portion (22-1) and a transmission portion (22-2); a gap is formed between the main body portion (22-1) and the anastomosis fixing seat (24) for inserting the tissue to be anastomosed; the anastomosis pressure plate (22) has a receiving groove (22-3) for embedding the D-shaped staple. The push block (25), installed on the anastomosis fixation seat (24), can move in the first direction to enter the staple cartridge (26). When one side of the push block (25) presses one side of the D-shaped staple, the D-shaped staple can be pushed out to puncture the tissue to be anastomosed and enter the receiving groove (22-3). The first drive mechanism is capable of driving the main body (22-1) to move along the second direction toward the matching fixing seat (24) via the transmission part (22-2), and driving the matching moving seat (18) to move along the first direction; The second drive mechanism can drive the pusher (25) to enter the staple cartridge (26) along the first direction.

2. The D-type stapler according to claim 1, characterized in that, The D-type stapler also includes a gear (20) mounted on the anastomosis moving seat (18); the transmission part (22-2) has a rack surface that matches the gear (20) and extends in a second direction; The first drive mechanism includes a closed pull block rack (19), which is capable of reciprocating along a first direction, and the closed pull block rack (19) meshes with the gear (20).

3. The D-type stapler according to claim 2, characterized in that, The D-type stapler also includes a coupling assembly (21) which is rotatably connected to the stapler fixation base (24). When the coupling component (21) rotates to the first angle, the matching moving seat (18) can be coupled to the matching fixed seat (24) through the coupling component (21); the coupling component (21) can be maintained at the first angle when no external force is applied. When the coupling component (21) rotates to the second angle, the matching moving seat (18) is decoupled from the matching fixed seat (24).

4. The D-type stapler according to claim 3, characterized in that, The D-type stapler also includes: Push block seat (16) is fixed to the push block (25); The decoupling push rod (17) is connected to the push block seat (16) and can drive the push block seat (16) to move along the first direction; The push block seat (16) has a protrusion (16-1) on one side. When the protrusion (16-1) moves along the first direction, it can squeeze one side of the coupling component (21) to drive the coupling component (21) to rotate from the first angle to the second angle.

5. The D-type stapler according to claim 1, characterized in that, The D-type stapler also includes a pressure plate sleeve (23), which is fitted onto the main body (22-1) and slidably connected to the stapler fixing seat (24), and can slide along the second direction.

6. The D-type stapler according to any one of claims 2-5, characterized in that, The D-type stapler also includes: An operating grip (100) is provided for hand gripping and operation. The instrument tube (12) extends along a first direction and is used to connect the operating grip (100) and the fitting fixation seat (24). The first drive mechanism and the second drive mechanism are partially disposed inside the instrument tube (12).

7. The D-type stapler according to claim 6, characterized in that, The first driving mechanism includes: A finger-operated trigger (6) is installed on one side of the operating grip (100) and can move in a first direction for human hand operation; A lever (13) is connected to the finger-operated trigger (6) at its proximal end and can move with the finger-operated trigger (6); the lever (13) is connected to the closed pull block rack (19) at its distal end. A first spring (14) is installed inside the instrument tube (12) and abuts against the anastomosis moving seat (18) to provide elastic force for the anastomosis moving seat (18) to reset.

8. The D-type stapler according to claim 7, characterized in that, The second drive mechanism includes: The electric actuator assembly (4) is installed inside the operating grip (100) and is capable of telescopic extension and retraction in a first direction; The motor (3) is installed in the operating grip (100) and is used to drive the electric actuator assembly (4) to extend, stop or retract; Push rod (11), the far end of which is connected to push block (25) via decoupling push rod (17), and the near end of which is directly connected to electric push rod assembly (4) or via coupling (8).

9. The D-type stapler according to claim 8, characterized in that, The D-type stapler also includes: A limiting buckle (9) is rotatably mounted in the operating grip (100), and the limiting buckle (9) can be rotated to a first position or a second position; the limiting buckle (9) has a protrusion (9-1), and when the limiting buckle (9) reaches the first position, the protrusion (9-1) restricts the travel of the finger trigger (6). The spring piece (5) is fixed to the limiting buckle (9) to keep the limiting buckle (9) in the first position when it is not subjected to external force; One end of the limiting buckle (9) is located on the moving path of the coupling (8) or the push rod (11) so that it can be squeezed to reach the second position when the coupling (8) or the push rod (11) moves.

10. The D-type stapler according to claim 9, characterized in that, The D-type stapler also includes a trigger locking spring (7), which is installed in the operating grip (100) and located on one side of the finger-operated trigger (6). When the trigger locking spring (7) is not subjected to external force, it can fit against the finger-operated trigger (6). The trigger locking spring (7) can engage with the finger-operated trigger (6) at a preset position to lock the finger-operated trigger (6) when it has moved to a preset stroke.

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