Surgical stitching instrument

Abstract

The invention relates to a surgical stitching instrument, and belongs to the technical field of medical instruments. The surgical stitching instrument comprises an outer tube, a nail bin, an adjusting rod and a pressing rod. A support is arranged at the front end of the outer tube, the nail bin is located on one side of the support and hinged to the support, and the adjusting rod and the pressing rod penetrate into the outer tube in a sliding mode. The adjusting rod is configured to drive the nail bin to rotate and change the included angle between the nail bin and the support, and the pressing rod is configured to push out the suturing nails in the nail bin. According to the surgical stitching instrument provided by the invention, the nail bin can rotate relative to the support, so that the surgical stitching instrument has different states. When the surgical stitching instrument needs to be inserted into a narrow channel such as an obturator, the nail bin and the support can be rotated to abut against each other, so that the combined size of the nail bin and the support is small; when the surgical stitching instrument is inserted into a designated position, the included angle between the nail bin and the support can be changed, namely, the direction of the nail bin is changed, so that the pressing rod sliding front and back can push out stitching nails in the nail bin forwards.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a surgical stapler. Background Art

[0002] Surgical visceral suture staples, also known as anastomosis staples, are mechanical closure devices used for tissue or organ anastomosis during surgical operations. They mainly replace traditional manual sutures and are widely used in gastrointestinal, hepatobiliary, lung and other visceral surgeries.

[0003] Surgical visceral suture staples are nail-like objects made of metal or absorbable materials released by a stapler. They squeeze the tissue edges from both sides to the middle through mechanical pressure. Their core function is to evenly close tissues or blood vessels, thereby achieving multiple uses such as quickly suturing organs, tissue wounds or wound edges under laparoscopy, anastomosing tubular tissues, stopping bleeding in organ or tissue wounds, and ligating tissue strips or blood vessels.

[0004] The invention patent with application number CN202110420834.8 discloses a one-time molded surgical suture linear stapler. The stapler usually includes a suturing part, which includes a suturing head and a movable suture stapler. Since the stapler needs to hold rows of staples, the size of the stapler is large. The front end of this linear stapler occupies more space and cannot pass through an obturator or the like for minimally invasive operations. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a surgical stapler that can change the angle between the staple magazine and the support bracket, thereby changing the direction of the staple magazine, so that the surgical stapler has different states and can perform minimally invasive surgery.

[0006] The technical solutions of the present invention are as follows: The present invention provides a surgical stapler, comprising an outer tube, a staple magazine, an adjusting rod and a pressure rod; a support is provided at the front end of the outer tube, the staple magazine is located on one side of the support and the two are hinged, the adjusting rod and the pressure rod are slidably inserted into the outer tube; the adjusting rod is configured to drive the staple magazine to rotate and change the angle between the staple magazine and the support, and the pressure rod is configured to push out the suture staples in the staple magazine.

[0007] The surgical stapler has a first state and a second state: when the surgical stapler is in the first state, the staple cartridge and the support are in abutment; when the surgical stapler is in the second state, the staple cartridge and the support are arranged at an angle.

[0008] As an optional solution, the surgical stapler further includes a connecting rod, and both ends of the connecting rod are hinged to the staple magazine and the pressure rod respectively.

[0009] As an optional solution, the nail magazine and the support cooperate to form a cylindrical shape.

[0010] As an option, the diameter of the cylindrical shape is smaller than the diameter of the outer tube.

[0011] As an optional solution, the front end of the nail magazine is hinged to the front end of the support.

[0012] As an optional solution, the cross-section of the staple cartridge is trapezoidal, and a pressing block is provided at the front end of the staple cartridge, and the pressing block is configured to cause the middle portion of the pushed-out suture staple to bend in an arc shape.

[0013] As an optional solution, a limit block is provided at the front end of the staple cartridge, and the limit block is configured to allow the suture staple to be detached from the staple cartridge only after being bent at a preset angle.

[0014] As an optional solution, there are two limit blocks, the distance between the two limit blocks is less than the length of the suture nail, and the distance between the top of the limit block and the bottom of the nail slot of the nail magazine is a preset bending distance.

[0015] As an optional solution, the front end surface of the nail magazine is a sloped surface, and the nail outlet of the nail magazine is located on the sloped surface.

[0016] As an optional solution, the maximum inclination angle of the nail magazine is 45°.

[0017] As an optional solution, the nail magazine includes a first body, a push block and a forward push spring, the first body is provided with a nail groove, the push block is slidably arranged in the first body, and the forward push spring enables the push block to have a tendency to push the suture nail in the nail groove forward.

[0018] As an optional solution, a left-right movable wrench is provided at the rear end of the adjusting rod, an axial strip groove is provided on the outer tube, and the strip groove is provided with at least one locking area, and the wrench can slide along the strip groove and can be embedded in the locking area.

[0019] As an optional solution, the surgical stapler further includes a handle, the handle including a second body and a scissor-type controller, the scissor-type controller is provided on the second body and is configured to drive the pressure rod to move forward and backward.

[0020] The beneficial effects of the present invention are: The surgical stapler provided by the present invention has a staple cartridge that can rotate relative to a support, thereby allowing the surgical stapler to have different positions. When the surgical stapler needs to be inserted into a narrow passage, such as an obturator, the staple cartridge and the support can be rotated until they abut against each other, thereby reducing the combined volume of the staple cartridge and the support. After the surgical stapler is inserted into a designated position, the angle between the staple cartridge and the support can be changed, that is, the direction of the staple cartridge can be changed, so that the pressure rod that slides back and forth can push the staples in the staple cartridge forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. The above and other objects, features and advantages of the present invention will become more apparent through the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings. The drawings are not intentionally scaled to their actual sizes, and the focus is on illustrating the main purpose of the present invention.

[0022] Figure 1 Schematic diagram of the structure of the surgical stapler provided in an embodiment of the present invention Figure 1 ; Figure 2 Schematic diagram of the structure of the surgical stapler provided in an embodiment of the present invention Figure 2 ; Figure 3 A schematic diagram of the rear end partial structure of a surgical stapler provided in an embodiment of the present invention; Figure 4 for Figure 1 A partial enlarged schematic diagram of part A; Figure 5 Schematic diagram of the structure of the stapler cartridge of the surgical stapler provided in an embodiment of the present invention Figure 1 ; Figure 6 Schematic diagram of the structure of the stapler cartridge of the surgical stapler provided in an embodiment of the present invention Figure 2 ; Figure 7 Schematic diagram of the structure of the stapler cartridge of the surgical stapler provided in an embodiment of the present invention Figure 3 ; Figure 8 for Figure 7 AA cross-sectional view; Figure 9 for Figure 1 A partial enlarged schematic diagram of part B.

[0023] Icons: 10-surgical stapler; 200-suture staple; 11-handle; 12-outer tube; 13-suturing mechanism; 110-second body; 111-fixed handle; 112-movable handle; 113-connecting part; 120-strip groove; 121-locking area; 130-nail magazine; 131-first body; 132-push block; 133-forward push spring; 134-nail groove; 135-pressure block; 136-limiting block; 140-adjusting rod; 141-wrench; 150-pressure rod; 151-mounting head; 160-connecting rod; 170-support member; 171-support. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0028] Please refer to Figure 1 、 Figure 2 As shown, an embodiment of the present invention provides a surgical stapler 10, which is mainly used for quickly suturing internal organs or tissues during surgery.

[0029] The surgical stapler 10 generally needs to be used in conjunction with the suture staples 200, that is, during the operation, the suture staples 200 need to be placed in the surgical stapler 10 first, and then the medical staff can fix the suture staples 200 to the designated position by manipulating the surgical stapler 10. Of course, during the production process, the suture staples 200 can be placed directly in the surgical stapler 10, and the surgical stapler 10 can also be used as a disposable medical device. In order to more intuitively represent the stapling method and usage of the surgical stapler 10, the partial figures in this embodiment include the suture staples 200. However, it should be noted that the suture staples 200 may not be a component of the surgical stapler 10, and the suture staples 200 can be loaded only when in use or when leaving the factory.

[0030] The suture staple 200 is a conventional medical device. The suture staple 200 has a roughly gate-shaped structure. For example, the suture staple 200 includes an integrally formed middle portion and two side portions. The two side portions are located on either side of the middle portion. The side portions and the middle portion can be perpendicular to each other or can be arranged at an angle. The angle is not limited, for example, 60°, 70°, 80°, 85°, etc.

[0031] The material of the suture staple 200 is not limited and can refer to existing technologies, such as metal materials that are not easy to rust, plastic materials, materials that can be absorbed by the human body, etc.

[0032] Generally speaking, the suture staples 200 are usually presented in the form of staple rows, that is, a staple row includes multiple suture staples 200 arranged in sequence, adjacent suture staples 200 are connected to each other, and the connection portion 113 between two adjacent suture staples 200 is relatively fragile and easily separated.

[0033] Furthermore, the surgical stapler 10 can be inserted directly into the patient's body through the surgical opening, or can be inserted into the patient's body in conjunction with an obturator, such as a device, such that the surgical stapler 10 is inserted into the obturator and exposed from the front end of the obturator. Of course, the surgical stapler 10 in this embodiment can also be used to suture wounds outside the body.

[0034] First, it should be noted that the terms "front" and "back" in this embodiment are artificially defined. For example, the end closest to the affected tissue is the "front," or "proximal," while the end farther from the affected tissue is the "back," or "distal." These directional terms are used solely to describe the relative positions of the components of the surgical stapler 10 and do not represent absolute positions.

[0035] The following is a detailed discussion of each component of the surgical stapler 10.

[0036] The surgical stapler 10 is mainly composed of a handle 11 , an outer tube 12 and a suturing mechanism 13 .

[0037] The structure of the handle 11 is not limited and can refer to the existing technology. It mainly plays the role of supporting the outer tube 12 and the suturing mechanism 13. In addition, medical staff can control the movement of the suturing mechanism 13 by holding the handle 11.

[0038] In this embodiment, the handle 11 can adopt but is not limited to the following solutions: Figure 3 As shown, the handle 11 includes a second body 110 and a scissor-type controller, and the scissor-type controller is provided on the second body 110 .

[0039] The shape and structure of the second body 110 are not limited, for example, it can be cylindrical, prismatic, irregular, etc. The interior of the second body 110 can be hollow or solid.

[0040] The structure of the scissor-type controller is similar to that of scissors, and is mainly composed of a fixed handle 111 and a movable handle 112 . The fixed handle 111 and the movable handle 112 are hinged to each other, and the fixed handle 111 and the movable handle 112 can rotate relative to each other.

[0041] The fixed handle 111 is fixedly connected to the second body 110. The connection method between the two is not limited, such as integral molding, welding, or connection via threaded fasteners. The movable handle 112 can be directly hinged to the fixed handle 111, or indirectly hinged via other structures such as a hinge axis. For example, the fixed handle 111 is fixed to the second body 110, and the movable handle 112 is hinged to the second body 110 via a hinge axis. The hinge axis can extend in any direction, such as left or right.

[0042] A return spring can be arranged between the fixed handle 111 and the movable handle 112, or between the movable handle 112 and the second body 110. The return spring makes the movable handle 112 tend to return to its original position, that is, when the medical staff applies a force to drive the movable handle 112 to rotate relative to the fixed handle 111, the return spring can be compressed or stretched; when the force applied by the medical staff is cancelled, the return spring can push or pull the movable handle 112 to rotate in the opposite direction to its original position without the medical staff applying any force.

[0043] The return spring may be a compression spring, a tension spring, or a torsion spring, and its installation method may refer to the prior art and will not be described in detail here. Of course, in some embodiments, no return spring is provided between the fixed handle 111 and the movable handle 112, or between the movable handle 112 and the second body 110, and the movable handle 112 may be manually reset by the medical staff.

[0044] The first ends of the fixed handle 111 and the movable handle 112 may be provided with operating holes so that medical personnel can insert their fingers into the operating holes to control the movements of the fixed handle 111 and the movable handle 112. Of course, in some embodiments, the fixed handle 111 and the movable handle 112 may not be provided with operating holes.

[0045] The rear end of the outer tube 12 is fixedly connected to the handle 11 , and the connection method between the two is not limited, such as integral molding, plug-in, clip-on, connection via threaded fasteners, etc.

[0046] The outer tube 12 is generally a tubular structure, such as a round tube, a square tube, an elliptical tube, an irregular tube, etc., and is hollow inside or provided with a through chute.

[0047] The outer tube 12 extends in the front-to-back direction. The length of the outer tube 12 is not limited and can be long or short. The outer tube 12 of different lengths can be selected according to actual needs. In addition, the material of the outer tube 12 is also not limited, such as metal, plastic, etc., and it needs to have a certain hardness.

[0048] The suturing mechanism 13 is inserted into the outer tube 12 , and the front end of the suturing mechanism 13 extends from the front end of the outer tube 12 , and the rear end of the suturing mechanism 13 extends into the handle 11 .

[0049] Please combine Figure 4 As shown, the suturing mechanism 13 includes a staple cartridge 130, a pressure rod 150 and an adjusting rod 140, wherein the staple cartridge 130 is used to hold staples 200, the pressure rod 150 is used to control the flipping of the staple cartridge 130, and the adjusting rod 140 is used to push the staples 200 in the staple cartridge 130 outward one by one.

[0050] A support 171 is provided at the front end of the outer tube 12, and the structure and style of the support 171 are not limited. The support 171 can be a part of the outer tube 12. For example, the front end of the outer tube 12 is provided with a half-tube portion, and the half-tube portion is a portion of the outer tube 12 cut off along the axial plane of the outer tube 12. It can also be provided independently of the outer tube 12. In this embodiment, the support 171 and the outer tube 12 are independent of each other. The suturing mechanism 13 includes a support member 170. The support member 170 is passed through and fixed in the outer tube 12. The front end of the support member 170 extends from the front end of the outer tube 12. The portion of the support member 170 extending from the front end of the outer tube 12 is the support 171. The support 171 can be semi-tubular, semi-cylindrical, or prismatic.

[0051] The staple cartridge 130 is hingedly connected to the support 171. The hinge position of the staple cartridge 130 and the support 171 is not limited. For example, the front end of the staple cartridge 130 is hingedly connected to the middle of the support 171, or the middle of the staple cartridge 130 is hingedly connected to the front end of the support 171. Preferably, the front end of the staple cartridge 130 and the front end of the support 171 are hingedly connected via a hinge axis, and the hinge axis can extend in the left-right direction, that is, the hinge axis extends in the radial direction of the outer tube 12. The staple cartridge 130 can rotate around the hinge axis, thereby changing the angle between the staple cartridge 130 and the support 171.

[0052] As the nail magazine 130 rotates, the angle between the nail magazine 130 and the support 171 changes, so that the nail magazine 130 is in different positions, including two main positions. Specifically, the nail magazine 130 includes a first position and a second position: when the nail magazine 130 is in the first position, the nail magazine 130 and the support 171 are close to each other or the distance between them is small, that is, the angle between the nail magazine 130 and the support 171 is 0 or approximately equal to 0. At this time, the combined diameter or width of the nail magazine 130 and the support 171 is small, so When inserting the surgical stapler 10 into a designated position or inserting the surgical stapler 10 into an obturator; when the staple cartridge 130 is in the second position, the staple cartridge 130 rotates a preset angle relative to the support 171 around the hinge axis, and an angle is formed between the staple cartridge 130 and the support 171. The angle can be adjusted as needed, for example, 30°, 45°, 60°, 90°, etc. Preferably, the maximum inclination angle of the staple cartridge 130 is 45°, so that the staple cartridge 130 does not affect the surgical vision of medical staff. In a surgical stapler 10, the staple cartridge 130 can have only one second position or more than two second positions, that is, the staple cartridge 130 can be locked when it is in the first second position, and after unlocking, the staple cartridge 130 can be rotated to the second second position and locked.

[0053] The shape of the staple cartridge 130 is not limited; for example, the entire structure can be a semi-cylindrical, prismatic, or other shapes. In this embodiment, the opposite sides of the staple cartridge 130 and the support 171 can each be cylindrical. When the staple cartridge 130 is in the first position, the staple cartridge 130 and the support 171 together form a cylindrical or quasi-cylindrical shape. The "cylindrical or quasi-cylindrical shape" referred to herein does not necessarily require a standard cylindrical shape; a generally cylindrical shape is sufficient. This configuration allows the suturing mechanism 13 to smoothly pass through the outer tube 12 or obturator, and the combined surface of the staple cartridge 130 and the support 171 is smoother, making it less likely to scratch the patient's tissue.

[0054] The structure of the staple cartridge 130 is not limited and can refer to the prior art. In this embodiment, the following solutions can be adopted but are not limited to: Figure 5-Figure 8 As shown, the nail magazine 130 includes a first body 131 , a push block 132 and a forward push spring 133 .

[0055] The shape of the first body 131 is not limited, for example, a semi-cylindrical shape, a prism shape, and other shapes.

[0056] The first body 131 is provided with a staple groove 134 for receiving a row of staples. The cross-section of the staple groove 134 is trapezoidal, such as an isosceles trapezoid, a right-angled trapezoid, an irregular trapezoid, etc. Accordingly, the shape of the staple 200 needs to match the cross-sectional shape of the staple groove 134. For example, if the cross-sectional shape of the staple groove 134 is an isosceles trapezoid, then the shape of the staple 200 is also an isosceles trapezoid.

[0057] When the cross section of the staple groove 134 is an isosceles trapezoid, during the process of pushing the staple 200 out, the two side portions of the staple 200 will be inserted into the tissue at an angle, making it difficult for the staple 200 to separate from the tissue, thereby maintaining the stability of the wound suture.

[0058] A nail outlet is provided at the front end of the nail groove 134 , and the nail outlet is located at one end of the main body. The suture nail 200 can be pushed out from the nail outlet and pressed into the tissue that needs to be sutured.

[0059] The push block 132 is slidably embedded in the nail groove 134 and is capable of sliding within the nail groove 134. The push block 132 can be shaped in any manner, including a block or plate. In this embodiment, the push block 132 is a plate-shaped structure that is inserted into the bottom of the nail groove 134. When pushed and slid within the nail groove 134, the push block 132 can push the nail row forward along the nail groove 134.

[0060] The forward push spring 133 imparts a tendency for the push block 132 to push the staples 200 forward. Specifically, the forward push spring 133 pushes the push block 132 to slide along the staple slot 134, thereby gradually advancing the leading edge of the staple row 200. The forward push spring 133 can be a compression spring or a tension spring. If the forward push spring 133 is a tension spring, its two ends are connected to the first body 131 and the push block 132, respectively. When the staple row is restrained, the forward push spring 133 is in a stretched state. When the leading edge of the staple row 200 is ejected, the forward push spring 133 pulls the push block 132, thereby pushing the entire staple row forward a certain distance.

[0061] The installation location and method of the forward push spring 133 are not limited and can refer to existing techniques. In this embodiment, the following solution can be adopted, but is not limited to: a strip groove 120 is provided on the inner side of the first body 131. The direction of extension of the strip groove 120 is consistent with the direction of extension of the nail groove 134. The opening of the strip groove 120 faces the bottom end of the nail groove 134, that is, the bottom end of the nail groove 134 is connected to the strip groove 120. The forward push spring 133 is located within the strip groove 120, and the end of the push block 132 is provided with a first connecting portion 113. The first connecting portion 113 is slidably embedded in the strip groove 120. The end of the strip groove 120 away from the first connecting portion 113 is provided with a second connecting portion 113. The ends of the forward push spring 133 are respectively connected and fixed to the first and second connecting portions 113. In other embodiments, the opening direction of the strip groove 120 can also be oriented in a direction away from the bottom end of the nail groove 134.

[0062] A pressing block 135 is provided at the front end of the staple cartridge 130 . The pressing block 135 is located in the middle of the staple slot 134 . There is a certain distance between the pressing block 135 and the bottom end of the staple slot 134 , and the distance is greater than or equal to the thickness of the suture staple 200 .

[0063] The cross-section of the staple cartridge 130 is trapezoidal. When the staple 200 is pushed out of the staple slot 134, the middle portion of the staple 200 is bent, allowing the two sides of the staple 200 to be inserted obliquely into the organ to be sutured. The function of the pressure block 135 is to ensure that the middle portion of the staple 200 is able to bend backward into an arc when the staple 200 is pushed out, so as to ensure that the staple 200 can be fully inserted into the tissue. If the middle portion of the staple 200 is bent forward, the middle portion will first contact and squeeze the tissue when the staple 200 is inserted into the tissue, and the middle portion corresponds to the wound portion, which is likely to cause secondary damage to the wound.

[0064] In addition, a limit block 136 is provided at the front end of the staple cartridge 130. The limit block 136 can prevent the suture staple 200 from abnormally escaping from the front end of the staple groove 134, and can ensure that the suture staple 200 at the front end of the staple row can only detach from the staple cartridge 130 after the bending angle reaches a preset angle.

[0065] Specifically, the stopper 136 is located at the front end of the staple groove 134, partially sealing the front end of the staple groove 134. The entire row of staples 200 cannot extend from the front end of the staple groove 134. Furthermore, a distance exists between the top of the stopper 136 and the bottom of the staple groove 134. This distance is referred to as the predetermined bending distance. The size of the predetermined bending distance determines the bending angle of the staples 200 when they are released from the staple groove 134. The larger the predetermined bending distance, the greater the bending angle at which the staples 200 can be released from the staple groove 134. Conversely, the smaller the predetermined bending distance, the smaller the bending angle at which the staples 200 can be released from the staple groove 134. Of course, it should be noted that when the bending angle of the staples 200 reaches the angle at which they can be released from the staple groove 134, the staples 200 do not necessarily have to be released from the staple groove 134 at this point; they can continue to bend to a certain extent, depending on the actual needs of the surgery.

[0066] The number of the limiting block 136 can be one or two. If the number of the limiting block 136 is one, a groove can be provided at the top of the limiting block 136 to match the bent suture staple 200 .

[0067] In this embodiment, there are two limit blocks 136 , which can be correspondingly arranged on the left and right sides of the front end of the nail groove 134 , and the distance between the two limit blocks 136 is smaller than the length of the suture nail 200 .

[0068] When the middle part of the suture staple 200 is not bent, the upper ends of the suture staple 200 are restricted by the staple groove 134, the front end is restricted by the two limit blocks 136, and the middle part is restricted by the pressing block 135, so that the suture staple 200 cannot escape from the staple groove 134; when the suture staple 200 is pushed outward, the pressing block 135 causes the middle part of the suture staple 200 to bend backward, that is, the middle part of the suture staple 200 still stays at the bottom end of the staple groove 134 or basically stays at the bottom end of the staple groove 134, and the two ends of the suture staple 200 move along the two side walls of the staple groove 134, and the suture staple 200 moves along the two side walls of the staple groove 134. The distance between the two side portions of the staple 200 and the bottom of the staple groove 134 gradually increases until the distance between the two ends of the staple 200 and the bottom of the staple groove 134 is greater than the distance between the top of the stop block 136 and the bottom of the staple groove 134. When the pressure rod 150 is released from the staple 200, the forward spring 133 pushes the staple 200 forward within the staple groove 134, pushing the bent staple 200 out, with the middle portion of the staple 200 emerging from between the two stop blocks 136 and the two ends of the staple 200 emerging from above the two stop blocks 136. Of course, in some embodiments, a notch may be provided at the bottom of the staple groove 134 to facilitate smooth bending of the staple 200. The side of the pressure block 135 proximal to the staple 200 may be flat or curved.

[0069] In addition, in some embodiments, the front end of the nail magazine 130 can be set as a slope, that is, an inclined surface, the slope is set at an angle to the nail groove 134, the nail outlet of the nail groove 134 is located on the slope, and the slope can extend to the limit block 136. This setting can ensure The adjustment rod 140 is used to achieve the flipping of the nail magazine 130 relative to the support 171. Specifically, the adjustment rod 140 is slidably provided in the outer tube 12. Of course, the adjustment rod 140 is also slidably provided in the support member 170. The adjustment rod 140 can slide back and forth along the axial direction of the outer tube 12. When the adjustment rod 140 slides back and forth, it can push the nail magazine 130 to flip, thereby changing the angle between the nail magazine 130 and the support 171.

[0070] The shape of the adjustment rod 140 is not limited and can be a rod or a tube, such as a round rod, a square rod, a round tube, a square tube, etc. The length of the adjustment rod 140 can be set as needed and generally needs to match the length of the outer tube 12. Matching here does not mean being equal, but if the length of the outer tube 12 increases or decreases, the length of the adjustment rod 140 will also increase or decrease appropriately, so that the rear end of the adjustment rod 140 can extend into the handle 11 and the front end can be connected to the nail magazine 130.

[0071] The structure for the adjusting rod 140 to push the nail magazine 130 to flip is not limited. For example, a slide groove is provided on one side of the nail magazine 130, and the slide groove extends along the length direction of the nail magazine 130. A slider is embedded in the slide groove, and the slider can slide along the slide groove. The adjusting rod 140 is hinged to the slider. When the adjusting rod 140 slides back and forth, it can push the slider to slide along the slide groove, and the slider rotates relative to the adjusting rod 140, thereby causing the nail magazine 130 to rotate relative to the support 171.

[0072] In this embodiment, the cooperation between the adjusting rod 140 and the nail magazine 130 can also adopt the following scheme: the suturing mechanism 13 also includes a connecting rod 160, and the two ends of the connecting rod 160 are respectively hinged to the nail magazine 130 and the adjusting rod 140, and the hinge position is not limited. Preferably, the first end of the connecting rod 160 is hinged to the rear end of the nail magazine 130, and the second end is hinged to the front end of the adjusting rod 140.

[0073] The structure of the connecting rod 160 is not limited and can be a rod, a tube, a bar, or a block. The length of the connecting rod 160 determines the rotation angle of the staple cartridge 130 when the adjustment rod 140 slides a fixed distance, and the length can be set as needed. Generally speaking, the connecting rod 160 needs to be located outside the outer tube 12, for example, the connecting rod 160 is located on one side of the support 171.

[0074] The support 171, the staple cartridge 130, and the connecting rod 160 can be considered a triangular structure with variable side lengths. Specifically, the hinge axis between the support 171 and the staple cartridge 130 can be considered the first vertex, the hinge axis between the staple cartridge 130 and the connecting rod 160 can be considered the second vertex, and the hinge axis between the connecting rod 160 and the adjustment rod 140 can be considered the third vertex. The area between the first and second vertices can be considered the first side, the area between the second and third vertices can be considered the second side, and the area between the third vertex and the first vertex can be considered the third side. When the adjustment rod 140 slides back and forth, the length of the third side changes, thereby changing the angles of the three corners of the triangle.

[0075] One thing that needs to be noted is that it is necessary to prevent the above structure from having a "dead point", that is, the first vertex, the second vertex and the third vertex are collinear. The prevention method is also relatively simple. For example, a limit portion is set on the support 171 to limit the rotation range of the nail magazine 130, or it is designed so that when the nail magazine 130 is in contact with the support 171, the first vertex, the second vertex and the third vertex are not collinear.

[0076] The adjusting rod 140 adjusts the rotation angle of the nail magazine 130 by moving forward and backward. The structure for controlling the forward and backward movement of the adjusting rod 140 is not limited. For example, in this embodiment, the following schemes can be adopted but are not limited to: Figure 9As shown, a wrench 141 is provided at the rear end of the adjusting rod 140, and the wrench 141 can move left and right on the adjusting rod 140. The connection method between the wrench 141 and the adjusting rod 140 is not limited, and can be slidably matched or hinged, that is, the wrench 141 can slide left and right or swing left and right.

[0077] The outer tube 12 is provided with a strip groove 120 , which extends along the axial direction of the outer tube 12 . The wrench 141 can slide in the strip groove 120 , thereby pushing or pulling the adjustment rod 140 to move forward and backward.

[0078] The strip groove 120 is provided with a locking area 121. The number of locking areas 121 is not limited, and may be one, two, or three, for example. If there are more than two locking areas 121, the multiple locking areas 121 need to be distributed along the axial direction of the outer tube 12. The location of the locking area 121 is not limited, and may be located at the front end, rear end, or middle portion of the strip groove 120. For example, the locking area 121 may be provided only at the front end, only at the rear end, or both at the front end and rear end. Generally speaking, it is best to provide the locking area 121 at the front end of the strip groove 120. The locking area 121 can be provided in any form, and may be a notch located on one side of the strip groove 120 and connected to the strip groove 120. When the wrench 141 enters the notch, the wrench 141 can no longer move forward or backward, thereby locking the adjustment rod 140 and maintaining the state of the staple cartridge 130. If multiple locking areas 121 are used, each locking area 121 into which the wrench 141 enters corresponds to a rotation angle of the nail magazine 130 . The rotation angle of the nail magazine 130 relative to the support 171 can be flexibly selected according to actual needs.

[0079] Of course, the gear rack drive structure is also suitable for controlling the adjustment rod 140 .

[0080] The suture staples 200 in the staple cartridge 130 are pushed out by a pressure rod 150, which is slidably disposed in the outer tube 12. Of course, the pressure rod 150 can also be slidably disposed in the support member 170. The pressure rod 150 can slide back and forth along the axial direction of the outer tube 12. When the pressure rod 150 slides back and forth, one or more suture staples 200 in the staple cartridge 130 can be pushed outward, thereby inserting the suture staples 200 into the tissue to suture the wound.

[0081] The pressure rod 150 can be rod-shaped or tubular, such as a round rod, a square rod, a round tube, a square tube, etc. The front end surface of the pressure rod 150 can be tilted to match the tilt angle of the nail magazine 130. Of course, the front end surface of the pressure rod 150 is not tilted.

[0082] The rear end of the pressure rod 150 cooperates with the handle 11. When the scissor-type controller is actuated, the pressure rod 150 can be driven to move forward and backward. The pressure rod 150 and the handle 11 can cooperate in any manner. For example, in this embodiment, the following scheme can be adopted but is not limited to: the second end of the movable handle 112 is provided with a connecting portion 113, which is connected to the rear end of the pressure rod 150.

[0083] Connecting portion 113 comprises a first portion and a second portion positioned opposite each other, with a receiving area formed between them. The first portion is located at the front end of the second portion and is U-shaped. A mounting head 151 is provided at the rear end of compression rod 150. Compression rod 150 passes through the U-shaped portion, and mounting head 151 is positioned within the receiving area. When movable handle 112 is rotated, connecting portion 113, through mounting head 151 and the like, can pull or push compression rod 150 forward and backward.

[0084] In other embodiments, the scissor-type controller can also be replaced with other structures, for example: a rack is provided at the rear end of the pressure rod 150, and the rack extends in the front-to-back direction; the handle 11 also includes a gear and a knob, and the gear is rotatably arranged on the second body 110, and the gear and the knob are coaxially fixed. The knob is located in the second body 110 of the handle 11. Medical staff can rotate the gear by turning the knob, and the gear can drive the rack to move along the length direction, thereby driving the pressure rod 150 to move forward and backward.

[0085] In order to cooperate with the structures such as the pressing block 135 and the limiting block 136, the front end of the pressing rod 150 can be configured to be U-shaped or V-shaped, so that the front end of the pressing rod 150 only contacts the two ends of the suture staple 200, and the middle portion does not contact it. This configuration ensures that the front end of the pressing rod 150 does not hinder the bending of the suture staple 200.

[0086] The method of using the surgical stapler 10 provided by the present invention is as follows: The surgical stapler 10 is inserted directly into the patient's body, or inserted into the patient's body through an obturator, with the front end of the surgical stapler 10 adjacent to the tissue wound that needs to be sutured; The medical staff pushes the wrench 141 forward, and the wrench 141 moves forward along the strip groove 120, and the adjustment rod 140 is pushed forward. The adjustment rod 140 controls the nail magazine 130 to rotate relative to the support 171 by a preset angle through the connecting rod 160 and the like; The wrench 141 moves leftward or rightward, and the wrench 141 enters the locking area 121 , the adjusting rod 140 no longer moves forward or backward, and the nail magazine 130 is locked; The medical staff squeezes the handle 11, and the movable handle 112 rotates relative to the fixed handle 111 or the first body 131. The movable handle 112 drives the pressure rod 150 to move forward, and the front end of the pressure rod 150 pushes the suture staple 200 at the front end of the staple row forward; The middle portion of the suture staple 200 is restrained by the pressing block 135 , the front end is restrained by the limiting block 136 , and the two sides are restrained by the two sides of the staple groove 134 , so that the middle portion of the suture staple 200 bends backward, and the side portions of the two ends of the suture staple 200 are inserted into the tissues on both sides of the wound; When the suture staple 200 is fully inserted into the tissue, the middle portion of the suture staple 200 bends to a certain extent. At this time, the distance between the two ends of the suture staple 200 and the bottom end of the staple groove 134 is greater than the distance between the top end of the stopper 136 and the bottom end of the staple groove 134. When the medical staff releases the movable handle 112, the reset spring resets the movable handle 112, thereby causing the pressing rod 150 to move backward and disengage from the suture staple 200; The forward pushing spring 133 pushes the staple row forward one grid through the pushing block 132 and pushes out the bent staple 200 at the front end; Repeat the above steps until multiple sutures are performed on the wound. The medical staff pulls the wrench 141, causing the wrench 141 to disengage from the locking area 121 and enter the strip groove 120. The medical staff then pulls the wrench 141 backward, causing the wrench 141 to retreat along the strip groove 120. The adjusting rod 140 is pushed backward, and the adjusting rod 140 controls the nail magazine 130 to rotate relative to the support 171 through the connecting rod 160, etc., until the nail magazine 130 and the support 171 are in contact or close to each other, and the angle between the nail magazine 130 and the support 171 is 0 or approximately equal to 0. The surgical stapler 10 is withdrawn from the patient's body or from the obturator.

[0087] It is foreseeable that the above steps can be increased, decreased, modified, and the order can be adjusted as needed. For example, if there is no reset spring, the medical staff needs to manually control the movable wrench 141 to reset; or if the wrench 141 is replaced with a gear rack drive structure, it is necessary to control the adjustment rod 140 to slide back and forth, and the medical staff needs to turn the knob to rotate the gear.

[0088] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A surgical stapler, characterized in that: The suture clip comprises an outer tube, a staple cartridge, an adjusting rod and a pressure rod; a support is provided at the front end of the outer tube, the staple cartridge is located on one side of the support and the two are hinged, the adjusting rod and the pressure rod are slidably arranged in the outer tube; the adjusting rod is configured to drive the staple cartridge to rotate and change the angle between the staple cartridge and the support, and the pressure rod is configured to push out the suture staples in the staple cartridge.

2. The surgical stapler according to claim 1, characterized in that: The surgical stapler further comprises a connecting rod, both ends of which are hinged to the staple cartridge and the pressure rod respectively.

3. The surgical stapler according to claim 1, wherein: The nail magazine and the support cooperate to form a cylindrical shape with a diameter smaller than that of the outer tube.

4. The surgical stapler according to claim 1, characterized in that: The cross section of the staple cartridge is trapezoidal, and a pressing block is provided at the front end of the staple cartridge. The pressing block is configured to cause the middle portion of the pushed-out staple to bend in an arc shape.

5. The surgical stapler according to claim 1, characterized in that: A limiting block is provided at the front end of the staple cartridge, and the limiting block is configured to be able to separate from the staple cartridge only after the suture staple is bent at a preset angle.

6. The surgical stapler according to claim 5, characterized in that: There are two limit blocks, the distance between the two limit blocks is less than the length of the suture nail, and the distance between the top of the limit block and the bottom of the nail slot of the nail magazine is a preset bending distance.

7. The surgical stapler according to claim 1, characterized in that: The front end surface of the nail magazine is a sloped surface, and the nail outlet of the nail magazine is located on the sloped surface.

8. The surgical stapler according to claim 1, characterized in that: The staple cartridge includes a first body, a push block and a forward push spring. The first body is provided with a staple groove. The push block is slidably disposed in the first body. The forward push spring enables the push block to have a tendency to push the suture staples in the staple groove forward.

9. The surgical stapler according to claim 1, characterized in that: The rear end of the adjusting rod is provided with a left-right movable wrench, the outer tube is provided with an axial strip groove, the strip groove is provided with at least one locking area, the wrench can slide along the strip groove and can be embedded in the locking area.

10. The surgical stapler according to claim 1, characterized in that: The surgical stapler further includes a handle, which includes a second body and a scissor-type controller. The scissor-type controller is disposed on the second body and is configured to drive the pressure rod to move forward and backward.

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