Nail cartridge assembly and medical stapler

Abstract

The present invention provides a stapler assembly and a medical stapler, wherein the stapler assembly comprises a stapler, a cutter and a driving member, wherein the stapler comprises a first stapler portion and a second stapler portion, wherein the first stapler portion is located at the proximal side of the second stapler portion, wherein the first stapler portion and the second stapler portion are respectively provided with a first knife groove and a second knife groove which are connected to each other, wherein the second stapler portion is provided with suture staples, wherein when the driving member moves to the second stapler portion, the suture staples in the second stapler portion are pushed out; when the cutter moves in the first knife groove, the top end of the cutter does not extend out of the upper surface of the first stapler portion and does not cut tissue, and when the cutter moves in the second knife groove, the top end of the cutter extends out of the upper surface of the second stapler portion to cut tissue. By adopting the present invention, the occurrence of a cross-stapling area during side-to-side stapling can be avoided.

Description

Technical Field

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

[0002] Linear staplers are widely used in surgical operations for wound suturing or suturing and cutting of internal tissues. Existing linear staplers generally include an upper clamp, a lower clamp, and a closing handle for closing the upper and lower clamps. A staple magazine assembly and a staple anvil are relatively arranged on the distal sides of the upper and lower clamps. The staple magazine assembly is provided with a driving member and a cutter that can move relative to the staple magazine assembly, and the driving member is driven by a push button. During the operation, the tissue is first received between the staple magazine assembly and the staple anvil, and the staple magazine assembly and the staple anvil are clamped on the tissue by operating the closing handle, and then the driving member and the cutter are driven in sequence by operating the push button to staple the staples in the staple magazine assembly onto the tissue and cut the tissue.

[0003] In the prior art, when the linear stapler is used for side-to-side anastomosis, especially T-shaped anastomosis, a cross-anastomosis area will inevitably appear at the intersection of the anastomosis lines. Figure 1 As shown in the figure, it is an example of a "T"-shaped anastomosis, in which the anastomosis line F1 and the anastomosis line F2 will have a cross-anastomosis area C, where the suture staples will cross, and the existence of the cross-staples will also produce a pulling force on the tissue when the cutter cuts. Therefore, there is a risk of anastomotic leakage in the cross-anastomosis area C. In order to avoid the problem of anastomotic leakage, doctors often need to embed the tissue in the cross-anastomosis area C, which is not conducive to postoperative tissue growth, and the additional embedding treatment will increase the operation time.

[0004] In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther from the operator, that is, the end closer to the surgical site is the distal side. Summary of the invention

[0005] In view of the problems in the prior art, an object of the present invention is to provide a staple magazine assembly and a medical stapler to avoid the occurrence of a cross-anastomosis area during side-to-side anastomosis.

[0006] An embodiment of the present invention provides a stapler assembly for a medical stapler, the stapler assembly comprising:

[0007] A staple cartridge, the staple cartridge comprising a first staple cartridge portion and a second staple cartridge portion, the first staple cartridge portion being located at a proximal end of the second staple cartridge portion, the first staple cartridge portion and the second staple cartridge portion being provided with a first knife groove and a second knife groove communicating with each other, and the second staple cartridge portion being provided with suture staples;

[0008] A cutter and a driving member, wherein the driving member drives the cutter to move from the proximal side of the first knife groove to the distal side of the second knife groove, and when the driving member moves to the second staple cartridge part, the suture staples in the second staple cartridge part are pushed out;

[0009] When the cutter moves in the first knife groove, the top end of the cutter does not extend out of the upper surface of the first staple cartridge part; when the cutter moves in the second knife groove, the top end of the cutter extends out of the upper surface of the second staple cartridge part to cut tissue.

[0010] Optionally, a first protrusion is provided on the first side of the cutter, and when the cutter moves from the first knife groove to the second knife groove, the first protrusion is pushed upward by the bottom surface of the second knife groove so that the top end of the cutter extends out of the upper surface of the second nail magazine part.

[0011] Optionally, a first protrusion is provided on a first side of the cutter, a first channel is provided on a first side wall of the first knife groove, and a second channel is provided on a first side wall of the second knife groove; when the cutter moves in the first knife groove, the first protrusion is located in the first channel, and when the cutter moves in the second knife groove, the first protrusion is located in the second channel;

[0012] The bottom surface of the second channel is higher than the bottom surface of the first channel.

[0013] Optionally, a blade guard is provided at the bottom of the nail magazine, and the blade guard and the first side wall of the first blade groove define the first channel, and the blade guard and the first side wall of the second blade groove define the second channel.

[0014] Optionally, a convex ridge is provided at a position of the blade guard corresponding to the second blade groove, and the convex ridge and a side wall of the second blade groove define the second channel.

[0015] Optionally, the proximal side surface of the convex ridge is configured as a first guide surface, and the first guide surface is inclined upward from the proximal side edge to the distal side edge thereof.

[0016] Optionally, the distal side surface of the convex ridge is configured as a second guide surface, and the second guide surface is inclined downward from the proximal side edge to the distal side edge thereof.

[0017] Optionally, a lower surface of the first side wall of the second knife groove is higher than a lower surface of the first side wall of the first knife groove.

[0018] Optionally, the proximal side surface of the first side wall of the second knife groove is set as a third guide surface, and the third guide surface is inclined upward from the proximal side edge to the distal side edge thereof.

[0019] Optionally, the distal side surface of the first side wall of the second knife groove is set as a fourth guide surface, and the fourth guide surface is inclined downward from the proximal side edge to the distal side edge thereof.

[0020] Optionally, a third channel is further provided on the distal side of the second channel, and a bottom surface of the third channel is lower than a bottom surface of the second channel.

[0021] Optionally, a cutter accommodating portion connected to the first knife groove is arranged above the first nail magazine portion, and the cutter accommodating portion protrudes from the first nail magazine surface of the first nail magazine portion.

[0022] Optionally, the first nail magazine surface of the first nail magazine portion is lower than the second nail magazine surface of the second nail magazine portion.

[0023] Optionally, a cutter mating portion is provided on the second side of the cutter, and the driving member pushes the cutter mating portion through a push rod to drive the push rod to move toward the distal end side of the nail magazine.

[0024] Optionally, the push rod is arranged on the distal side of the driving member; when the cutter is located on the proximal side of the nail magazine, the cutter matching portion is closer to the distal side of the nail magazine relative to the first protrusion.

[0025] Optionally, when the cutter is located at the first nail magazine portion, the first protrusion is closer to the first nail magazine surface of the first nail magazine portion relative to the cutter matching portion.

[0026] Optionally, the push rod is provided with a push rod fitting portion, the push rod fitting portion is a fitting hole, and the cutter fitting portion is a second protrusion passing through the push rod fitting portion; or, the cutter fitting portion is a fitting hole, and the push rod fitting portion is a second protrusion passing through the cutter fitting portion.

[0027] Optionally, the first side and the second side of the cutter are respectively provided with a first protrusion;

[0028] The first side and the second side of the cutter are respectively provided with a cutter matching portion, and the driving member is provided with a push rod corresponding to the cutter matching portion one by one.

[0029] An embodiment of the present invention further provides a medical stapler, comprising the staple cartridge assembly.

[0030] The stapler assembly and the medical stapler provided by the present invention have the following advantages:

[0031] The present invention provides a stapler assembly for a medical stapler, which divides the stapler into a first stapler portion on a proximal side and a second stapler portion on a distal side. When a driving member and a cutter move in the first stapler portion, tissues are not sutured or cut. However, when the driving member and the cutter move in the second stapler portion, tissues are sutured or cut, thereby avoiding the occurrence of intersections between stapler lines, avoiding the risk of anastomotic fistulas, eliminating the step of embedding treatment, reducing the duration of the operation, and improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0033] Figure 1 It is a schematic diagram of a "T" type anastomosis in the prior art;

[0034] Figure 2 is a schematic diagram of a "T"-shaped anastomosis in the present invention;

[0035] Figure 3 is a structural schematic diagram of a staple cartridge assembly when a cutter according to an embodiment of the present invention is located at a first staple cartridge portion;

[0036] Figure 4 is a top view of the staple cartridge assembly when the cutter according to one embodiment of the present invention is located at the first staple cartridge portion;

[0037] Figure 5 yes Figure 4 A1-A1 cross-sectional view;

[0038] Figure 6 yes Figure 4 A cross-sectional view along the A2-A2 direction;

[0039] Figure 7 and Figure 8 is a schematic structural diagram of a cutter according to an embodiment of the present invention;

[0040] Fig. 9 is a schematic diagram of the coordination of a nail magazine and a blade guard according to an embodiment of the present invention;

[0041] Fig.10 is a schematic structural diagram of a blade guard according to an embodiment of the present invention;

[0042] Fig.11 is a bottom schematic diagram of a nail magazine according to an embodiment of the present invention;

[0043] Fig.12 is a cross-sectional view of a nail magazine along the A1-A1 direction according to an embodiment of the present invention;

[0044] Fig.13is a structural schematic diagram of a staple cartridge assembly when a cutter according to an embodiment of the present invention is located at a second staple cartridge portion;

[0045] Fig.14 is a top view of the staple cartridge assembly when the cutter according to one embodiment of the present invention is located at the second staple cartridge portion;

[0046] Fig.15 yes Fig.14 B1-B1 cross-sectional view;

[0047] Fig.16 yes Fig.14 B2-B2 direction cross-sectional view;

[0048] Fig.17 is a cross-sectional view along the B1-B1 direction when the cutter of one embodiment of the present invention is located at the distal end side of the second nail magazine portion;

[0049] Fig.18 is a cross-sectional view along the B2-B2 direction when the cutter of one embodiment of the present invention is located at the distal end side of the second nail magazine portion;

[0050] Fig.19 is a cross-sectional view along the B1-B1 direction when the cutter of another embodiment of the present invention is located at the distal end side of the second nail magazine portion;

[0051] Fig. 20 and Fig.21 It is a schematic structural diagram of the cooperation between a driving member and a cutter according to another embodiment of the present invention.

[0052] Reference numerals:

[0053] 1 Nail magazine 19 Fourth guide surface

[0054] 11 First nail magazine part 2 Blade guard

[0055] 111 proximal side of the first nail magazine portion 21 distal side of the blade guard

[0056] 112 first nail magazine surface 22 blade guard proximal side

[0057] 113 Cutter accommodating portion 23 ridge

[0058] 12 second nail magazine portion 24 first guide surface

[0059] 121 second nail magazine distal end side 25 second guide surface

[0060] 122 Second nail magazine surface 3 Cutter

[0061] 123 nail holes 31 blade

[0062] 13 first slit 32 first protrusion

[0063] 14 Second sipe 33 Second protrusion

[0064] 15 First channel 4 drive

[0065] 16 Second channel 41 push rod

[0066] 17 Third channel 42 matching hole

[0067] 18 Third guide surface DETAILED DESCRIPTION

[0068] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0069] The present invention provides a stapler assembly for a medical stapler and a medical stapler including the stapler. The stapler includes an upper jaw, a lower jaw and a closing handle for closing the upper and lower jaws, the distal ends of the upper and lower jaws are relatively provided with a stapler assembly and a staple anvil, the stapler assembly includes a stapler, a staple pusher, a suture staple, a cutter and a driving member, when the stapler is fired, the driving member drives the cutter to move from the proximal side of the stapler to the distal side, and when the driving member moves to the stapler portion, the suture staple in the stapler portion is pushed out toward the staple anvil, so that the suture staple is stapled to the tissue.

[0070] In order to avoid the problem of the cross-stapling area, the present invention divides the stapler into a first stapler section and a second stapler section, the first stapler section is located at the proximal side of the second stapler section, the first stapler section and the second stapler section are respectively provided with a first knife groove and a second knife groove that are connected, no suture staples are provided in the first stapler section, and only the second stapler section is provided with suture staples, so when the driving member moves in the first stapler section, the tissue will not be sutured. When the cutter moves in the first knife groove, the top end of the cutter does not extend out of the upper surface of the first stapler section, and the tissue will not be cut at this time, and when the cutter moves in the second knife groove, the top end of the cutter extends out of the upper surface of the second stapler section to cut the tissue.

[0071] Therefore, by adopting the present invention, only the tissue position corresponding to the second stapler portion will be sutured and cut, while the tissue position corresponding to the first stapler portion will not be sutured and cut. When the stapler of the present invention is used for side-to-side anastomosis, the suture line formed will not have a cross-anastomosis area with other suture lines. For example, Figure 2 In the "T"-shaped anastomosis shown, there is only suture line 2 at the position corresponding to area C, and suture line 1 avoids the position corresponding to area C, so there will be no cross-stitching, avoiding the risk of anastomotic fistula and omitting the embedding treatment step.

[0072] Combine the following Figures 3 to 18 The structure of a nail magazine assembly of a specific embodiment of the present invention is described in detail. It can be understood that this specific embodiment is not intended to limit the protection scope of the present invention.

[0073] like Figure 3 to Figure 6 As shown, in this embodiment, the staple cartridge assembly includes a staple cartridge 1, a cutter 3 and a driving member 4. The staple cartridge 1 includes a first staple cartridge portion 11 and a second staple cartridge portion 12. The first staple cartridge portion 11 is located at the proximal side of the second staple cartridge portion 12. The first staple cartridge portion 11 and the second staple cartridge portion 12 are respectively provided with a first knife groove 13 and a second knife groove 14 that are connected. No suture staples are provided in the first staple cartridge portion 11, and no nail holes are provided in the first staple cartridge surface 112 of the first staple cartridge portion 11. A staple pusher and suture staples are provided in the second staple cartridge portion 12, and nail holes 123 corresponding to the suture staples are provided in the second staple cartridge surface 122 of the second staple cartridge portion 12. The proximal side 111 of the first staple cartridge portion 11 corresponds to the proximal side of the staple cartridge 1, and the distal side 121 of the second staple cartridge portion 12 corresponds to the distal side of the staple cartridge 1.

[0074] In the present invention, the distal side and the proximal side are relative to the operator, wherein the distal side refers to the end farther from the operator, and the proximal side refers to the end closer to the operator. The upper surface of the nail magazine refers to the side surface where the nail magazine surface is set, and the other side surface of the nail magazine opposite to the nail magazine surface is the lower surface of the nail magazine. The upper or upward direction refers to the direction from the lower surface of the nail magazine to the upper surface, and the lower or downward direction refers to the direction from the upper surface of the nail magazine to the lower surface. For example, in Fig. 9 In the perspective of FIG. 1 , the proximal side of the nail magazine 1 (i.e., the proximal side 111 of the first nail magazine portion 11) is the left side in the figure, and the distal side of the nail magazine 1 (i.e., the distal side 121 of the second nail magazine portion) is the right side in the figure; Figure 4 The surface of the nail magazine 1 seen in the top view is the upper surface of the nail magazine 1; Figure 5 and Figure 6 In the perspective of the figure, the top refers to the top of the perspective in the figure, and the bottom refers to the bottom of the perspective in the figure.

[0075] In an initial state, the driving member 4 and the cutter 3 are located at the proximal side of the nail magazine 1 , namely, at the proximal side 111 of the first nail magazine portion 11 , and the cutter 3 is located at the proximal side of the first knife groove 13 .

[0076] When the stapler with the staple magazine assembly is fired, the doctor pushes a push button (not shown in the figure), which drives the drive member 4 to move from the proximal side of the staple magazine 1 to the distal side. During this process, the drive member 4 drives the cutter 3 to move from the proximal side of the first knife groove 13 to the distal side of the second knife groove 14.

[0077] When the driving member 4 drives the cutter 3 to move in the first knife groove 13, since there is no suture staple in the first staple magazine portion 11, the tissue will not be sutured, and the top end of the cutter 3 does not extend out of the upper surface of the first staple magazine portion 11, and the tissue will not be cut; when the driving member 4 moves to the second staple magazine portion 12, the suture staple in the second staple magazine portion 12 is pushed out of the staple hole 123 toward the anvil to suture the tissue. At this time, the cutter 3 moves in the second knife groove 14, and the top end of the cutter 3 extends out of the upper surface of the second staple magazine portion 12 to cut the tissue.

[0078] Therefore, by adopting the present invention, only the tissue position corresponding to the second staple cartridge part 12 will be sutured and cut, while the tissue position corresponding to the first staple cartridge part 11 will not be sutured and cut. When the stapler with such a staple cartridge assembly is used for side-to-side anastomosis, the formed suture line will not have a cross-anastomosis area with other suture lines.

[0079] like Figure 5 and Figure 6 As shown, the top of the cutter 3 is provided with a blade 31 for cutting tissue, and the first side of the cutter 3 is provided with a first protrusion 32, the first side wall of the first knife groove 13 is provided with a first channel 15, and the first side wall of the second knife groove 14 is provided with a second channel 16, and the first channel 15 and the second channel 16 are connected. The structure of the cutter 3 can be seen in Figure 7 and Figure 8 When the cutter 3 moves in the first cutter groove 13 , the first protrusion 32 is located in the first channel 15 , and when the cutter 3 enters the second cutter groove 14 , the first protrusion 32 enters the second channel 16 .

[0080] like Figure 7 and Figure 8 As shown, the second side of the cutter 3 is also provided with a second protrusion 33. Figure 5 and Figure 6As shown, the driving member 4 is provided with a push rod 41, and the driving member 4 pushes the second protrusion 33 through the push rod 41, that is, drives the cutter 3 to move toward the distal side of the nail magazine 1. This is only an exemplary structure of the cutter 3. In other alternative embodiments, the cooperation method of the cutter 3 and the driving member 4 may also be different from the structure shown in the figure. Preferably, the push rod 41 is a push rod 41 extending distally on the driving member 4, and the side wall of the push rod 41 is close to the second side of the cutter 3 to limit the cutter 3 from shaking during movement. When the cutter 3 is located in the first nail magazine part 11, the first protrusion 32 is closer to the first nail magazine surface 112 of the first nail magazine part 11 than the second protrusion 33. That is, as Figure 6 , Figure 7 In the view direction shown, the second protrusion 33 is close to the bottom of the nail magazine 1, and the height of the first protrusion 32 is higher than the second protrusion 33. In this embodiment, the push rod 41 is arranged on the distal side of the driving member 4, and when the cutter 3 is located on the proximal side of the nail magazine 1, the second protrusion 33 is closer to the distal side of the nail magazine 1 relative to the first protrusion 32, so that when the push rod 41 pushes the second protrusion 33 toward the distal side, a more stable driving effect can be obtained.

[0081] In this embodiment, the bottom surface of the second channel 16 is higher than the bottom surface of the first channel 15. When the first protrusion 31 is located in the first channel 15, the cutter 3 is in a lower position as a whole, and the blade 31 of the cutter 3 is accommodated inside the first nail magazine part 11 and does not extend out of the upper surface of the first nail magazine part 11. When the first protrusion 32 enters the second channel 16 from the first channel 15, the first protrusion 32 is pushed up by the bottom surface of the second channel 16 and moves upward, and the cutter 3 moves upward accordingly, so that the blade 31 of the cutter 3 extends out above the upper surface of the second nail magazine part 12, and can cut tissue. Compared with the second protrusion 33, the first protrusion 32 is higher than the second protrusion 33; and in the process of the cutter 3 moving toward the distal end, the first protrusion 32 can rotate around the second protrusion 33.

[0082] like Figure 5 and Figure 6As shown, in order to avoid squeezing tissue that does not need to be anastomosed, the first staple cartridge surface 112 of the first staple cartridge part 11 is lower than the second staple cartridge surface 122 of the second staple cartridge part 12. Thus, the tissue corresponding to the first staple cartridge part 11 will not be over-squeezed by the staple cartridge assembly and the staple anvil. Further, since the first staple cartridge surface 112 is relatively low in height, in order to avoid the position of the cutter 3 being restricted too low when in the first staple cartridge part 11, and when the cutter 3 enters the second staple cartridge part 12 from the first staple cartridge part 11, the cutter 3 needs to have a large displacement to extend above the second staple cartridge surface 122, a cutter accommodating portion 113 connected to the first knife groove 13 is provided above the first staple cartridge part 11, and the cutter accommodating portion 113 protrudes from the staple cartridge surface of the first staple cartridge part 11. When the cutter 3 moves in the first knife groove 13, the top end of the cutter 3 moves in the cutter accommodating portion 113. In this embodiment, the upper surface of the second nail magazine portion 12 corresponds to the second nail magazine surface 122 of the second nail magazine portion 12, and the highest height of the upper surface of the first nail magazine portion 11 corresponds to the height of the cutter accommodating portion 13 of the first nail magazine portion 11. The upper surface of the cutter accommodating portion 113 is preferably a closed structure, and the top end of the cutter 3 is completely enclosed in the first knife groove 13. The upper surface of the cutter accommodating portion 113 is preferably flush with the second nail magazine surface 122 of the second nail magazine portion 12, but the present invention is not limited thereto. In other alternative embodiments, the upper surface of the cutter accommodating portion 113 may also be slightly lower than the second nail magazine surface 122 of the second nail magazine portion 12.

[0083] like Figures 9 to 12 As shown, a blade guard 2 is disposed at the bottom of the nail magazine 1, the proximal side 22 of the blade guard 2 is the left side in the figure, and the distal side 21 of the blade guard 2 is the right side in the figure. The upper surface of the blade guard 2 at a position corresponding to the first knife groove 13 serves as the bottom surface of the first knife groove 13, and the upper surface of the blade guard 2 at a position corresponding to the second knife groove 14 serves as the bottom surface of the second knife groove 14.

[0084] The upper surface of the blade guard 2 and the lower surface of the first side wall of the first knife groove 13 jointly define the first channel 15, that is, the upper surface of the blade guard 2 at a position corresponding to the first knife groove 13 also serves as the bottom surface of the first channel 15, and the lower surface of the first side wall of the first knife groove 13 serves as the top surface of the first channel 15. The upper surface of the blade guard 2 and the lower surface of the first side wall of the second knife groove 14 jointly define the second channel 16, that is, the upper surface of the blade guard 2 at a position corresponding to the second knife groove 14 also serves as the bottom surface of the second channel 16, and the lower surface of the first side wall of the second knife groove 14 serves as the top surface of the second channel 16.

[0085] Furthermore, the guard blade 2 is provided with an upwardly protruding ridge 23 at a position corresponding to the second knife groove 14, and the ridge 23 and a side wall of the second knife groove 14 define the second channel 16. Since the upper surface of the ridge 23 is higher than the upper surface of the guard blade 2 where the ridge 23 is not provided, the bottom surface of the second channel 16 is higher than the bottom surface of the first channel 15.

[0086] Only one specific implementation is given here. In other alternative implementations, a through groove may be directly opened in the middle of the first side wall of the first knife groove 13 as the first channel, and a through groove may be directly opened in the middle of the first side wall of the second knife groove 14 as the second channel, without the cooperation of the blade guard 2. In another alternative implementation, the first protrusion 32, the first channel 15 and the second channel 16 of the cutter 3 may not be provided, and the bottom surface of the second knife groove 14 may be directly set higher than the first knife groove 13. When the cutter 3 moves from the first knife groove 13 to the second knife groove 14, it will be pushed up by the bottom surface of the second knife groove 14 and extend out of the second nail magazine surface 121.

[0087] like Figures 13-16 , which shows the state of the staple cartridge assembly when the cutter 3 enters the second knife groove 14. Fig.13 It can be seen that the blade 31 at the top of the cutter 3 extends out of the upper surface of the second staple cartridge portion 12, that is, above the second staple cartridge surface 122 of the second staple cartridge portion 12. At this time, the cutter 3 continues to move toward the distal side of the staple cartridge 1 to cut the tissue.

[0088] like Fig.15 and Fig.16 As shown, in this embodiment, in order to better guide the movement of the cutter 3 from the first knife groove 13 to the second knife groove 14, the proximal side surface of the convex ridge 23 is set as a first guide surface 24, and the first guide surface 24 is inclined upward from its proximal side edge to the distal side edge. The first guide surface 24 can be set as an inclined plane or arc surface, so that the process of the cutter entering the second knife groove 14 from the first knife groove 13 is smoother.

[0089] Furthermore, in order to further limit the position of the cutter 3, in this embodiment, the lower surface of the first side wall of the second knife groove 14 is higher than the lower surface of the first side wall of the first knife groove 13, so that the upward movement of the cutter 3 is also limited. Corresponding to the first guide surface 24, the proximal side surface of the first side wall of the second knife groove 14 is set as a third guide surface 18, and the third guide surface 18 is inclined upward from its proximal side edge to the distal side edge. The third guide surface 18 can be an inclined plane or arc surface, which can better guide the first protrusion 32 of the cutter 3 from the first channel 15 into the second channel 16.

[0090] like Fig.17 and Fig.18 As shown, in this embodiment, a third channel 17 is further provided at the distal side of the second channel 16, and the bottom surface of the third channel 17 is lower than the bottom surface of the second channel 16. Preferably, the bottom surface height of the third channel 17 can be equal to the bottom surface height of the first channel 15, but the present invention is not limited thereto. After the cutter 3 has finished cutting the tissue, the top of the cutter 3 can enter the interior of the staple cartridge 1 again. In order to better guide the first protrusion 32 of the cutter 3 from the second channel 16 to enter the third channel 17, the distal side surface of the convex ridge 23 is set as a second guide surface 25, and the second guide surface 25 is inclined downward from its proximal side edge to the distal side edge, and the distal side surface of the first side wall of the second knife groove 14 is set as a fourth guide surface 19, and the fourth guide surface 19 is inclined downward from its proximal side edge to the distal side edge. The second guide surface 25 and the fourth guide surface 19 can be inclined planes or arc surfaces, which can better guide the movement of the first protrusion 32 of the cutter 3 between the second channel 16 and the third channel 17.

[0091] like Figures 19 to 21 As shown, in another embodiment of the present invention, the third channel may not be provided, that is, the second channel 16 extends all the way to the distal side 121 of the second nail magazine portion 12, thereby eliminating the need to provide a fourth guide surface on the distal side of the second channel 16 and a second guide surface on the distal side 21 of the blade guard 2.

[0092] Furthermore, in this other embodiment, in order to ensure that the top end of the cutter 3 can re-enter the interior of the staple cartridge 1 after the operation is completed, the drive member 4 can pull the cutter 3 back to the proximal side of the staple cartridge 1 into the first channel 15 when the firing is completed. Fig. 20 and 21 As shown, the top of the cutter 3 is provided with a blade 31, one side of the cutter 3 is provided with a first protrusion 32, and the other side is provided with a second protrusion 33. Corresponding to the second protrusion 33 of the cutter 3, a matching hole 42 is provided on the distal side of the push rod 41, and the matching hole 42 is sleeved on the second protrusion 33. The cutter 3 and the push rod 41 of the driving member 4 are linked by the matching hole 42 and the second protrusion 33. After the operation is completed, by pulling the driving member 4 toward the proximal side of the stapler, the push rod 41 will drive the cutter 3 to move toward the proximal side of the stapler 1, and re-enter the first channel 15, so that the top of the cutter 3 is no longer exposed on the upper surface of the stapler 1. In another alternative embodiment, a matching hole can also be provided on the other side of the cutter 3, and a matching protrusion can be provided on the distal side of the push rod 41, and the matching protrusion of the push rod 41 can be inserted into the matching hole of the cutter 3, so that the linkage between the two can also be achieved.

[0093] exist Fig. 20In the perspective of the present invention, the second protrusion 32 is preferably arranged near the bottom end, and the first protrusion 32 is arranged higher than the second protrusion 33. When the cutter 3 enters the second channel 16 from the first channel 15 during the operation, and when the cutter 3 enters the first channel 15 from the second channel 16 after the operation is completed, the cutter 3 will rotate around the first protrusion 32 at the junction of the first channel 15 and the second channel 16. Correspondingly, the second protrusion 33 of the cutter 3 and the matching hole 42 of the push rod 41 will also rotate relative to each other. In order to better adapt to this kind of rotation, the matching surface of the second protrusion 33 of the cutter 3 and the matching hole 42 of the push rod 41 is preferably a smooth arc surface. Further preferably, the second protrusion 33 of the cutter 3 can be a cylindrical protrusion, and the matching hole 42 of the push rod 41 is a cylindrical hole. However, the present invention is not limited to this, and the linkage of the cutter 3 and the push rod 41 can also adopt other matching methods.

[0094] The structures of the above two embodiments can also be combined with each other. For example, in the first embodiment, when there are the first channel 15, the second channel 16 and the third channel 17, the matching hole 42 of the push rod 41 is also added to cooperate with the second protrusion 33 of the cutter 3 to achieve linkage, or, in the second embodiment, after the third channel 17 is cancelled, the matching hole 42 of the push rod 41 is not provided, that is, the push rod 41 can only push the cutter 3 toward the distal side of the nail magazine 1 but cannot pull the cutter 3 back to the proximal side of the nail magazine 1, etc., all of which belong to the protection scope of the present invention. In this embodiment, the first protrusion 32 is preferably higher than the second protrusion 33, and the push rod 41 is also preferably arranged at the distal side of the driving member 4, and when the cutter 3 is located at the proximal side of the nail magazine 1, the second protrusion 33 is closer to the distal side of the nail magazine 1 relative to the first protrusion 32, so that when the push rod 41 pushes the second protrusion 33 toward the distal side, a more stable driving structure can be obtained.

[0095] In the above embodiments, in order to better balance the forces on the driving member and the cutter, a preferred implementation is that the first protrusion 32 and the second protrusion 33 are both configured as a symmetrically arranged group, respectively arranged on both sides of the cutter 3; the push rod 41 of the driving member 4, the first channel 15, the second channel 16 and the third channel are also adaptively arranged.

[0096] The stapler assembly and the medical stapler provided by the present invention have the following advantages:

[0097] The present invention provides a stapler assembly for a medical stapler, which divides the stapler into a first stapler portion on a proximal side and a second stapler portion on a distal side. When a driving member and a cutter move in the first stapler portion, tissues are not sutured or cut. However, when the driving member and the cutter move in the second stapler portion, tissues are sutured or cut, thereby avoiding the occurrence of intersections between stapler lines, avoiding the risk of anastomotic fistulas, eliminating the step of embedding treatment, reducing the duration of the operation, and improving the safety of the operation.

[0098] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A nail magazine assembly, characterized in that: For a medical stapler, the staple cartridge assembly comprises: A staple cartridge, comprising a first staple cartridge part and a second staple cartridge part, wherein the first staple cartridge part is located at a proximal end side of the second staple cartridge part, wherein the first staple cartridge part and the second staple cartridge part are respectively provided with a first knife groove and a second knife groove in communication, wherein a first side wall of the first knife groove is provided with a first channel, and a first side wall of the second knife groove is provided with a second channel, wherein a bottom surface of the second channel is higher than a bottom surface of the first channel, and wherein suture staples are provided in the second staple cartridge part; A cutter and a driving member, wherein a first protrusion is provided on a first side of the cutter, and the driving member drives the cutter to move from a proximal side of the first knife groove to a distal side of the second knife groove, and when the driving member moves to the second staple cartridge part, the suture staples in the second staple cartridge part are pushed out; When the cutter moves in the first knife groove, the first protrusion is located in the first channel, and the top end of the cutter does not extend out of the upper surface of the first nail magazine part. When the cutter moves in the second knife groove, the first protrusion is located in the second channel, and the top end of the cutter extends out of the upper surface of the second nail magazine part to cut tissue.

2. The staple cartridge assembly according to claim 1, characterized in that: A blade guard is disposed at the bottom of the nail magazine. The blade guard and the first side wall of the first blade groove define the first channel. The blade guard and the first side wall of the second blade groove define the second channel.

3. The staple cartridge assembly according to claim 2, characterized in that: A convex ridge is provided at a position of the blade guard corresponding to the second blade groove, and the convex ridge and a side wall of the second blade groove define the second channel.

4. The staple cartridge assembly according to claim 3, characterized in that: The proximal side surface of the convex ridge is configured as a first guide surface, and the first guide surface is inclined upward from the proximal side edge to the distal side edge thereof; The distal side surface of the convex ridge is arranged as a second guide surface, and the second guide surface is inclined downward from the proximal side edge to the distal side edge thereof.

5. The staple cartridge assembly according to claim 3, characterized in that: A lower surface of the first side wall of the second knife groove is higher than a lower surface of the first side wall of the first knife groove.

6. The staple cartridge assembly according to claim 5, characterized in that: The proximal side surface of the first side wall of the second knife groove is set as a third guide surface, and the third guide surface is inclined upward from the proximal side edge to the distal side edge; The distal side surface of the first side wall of the second knife groove is arranged as a fourth guide surface, and the fourth guide surface is inclined downward from the proximal side edge to the distal side edge thereof.

7. The staple cartridge assembly according to claim 1, characterized in that: A third channel is further provided on the distal end side of the second channel, and a bottom surface of the third channel is lower than a bottom surface of the second channel.

8. The staple cartridge assembly according to claim 1, characterized in that: A cutter accommodating portion communicating with the first knife groove is disposed above the first nail magazine portion, and the cutter accommodating portion protrudes from the first nail magazine surface of the first nail magazine portion.

9. The staple cartridge assembly according to claim 1, characterized in that: The first nail magazine surface of the first nail magazine portion is lower than the second nail magazine surface of the second nail magazine portion.

10. The staple cartridge assembly according to claim 1, characterized in that: A cutter matching portion is provided on the second side of the cutter, and the driving member pushes the cutter matching portion through a push rod to drive the push rod to move toward the distal end side of the nail magazine.

11. The staple cartridge assembly according to claim 10, characterized in that: The push rod is arranged at the distal end side of the driving member; When the cutter is located at the proximal side of the nail magazine, the cutter matching portion is closer to the distal side of the nail magazine relative to the first protrusion.

12. The staple cartridge assembly according to claim 10, characterized in that: When the cutter is located at the first nail magazine portion, the first protrusion is closer to the first nail magazine surface of the first nail magazine portion relative to the cutter matching portion.

13. The staple cartridge assembly according to claim 10, characterized in that: The push rod is provided with a push rod matching portion, the push rod matching portion is a matching hole, and the cutter matching portion is a second protrusion penetrating the push rod matching portion; or, the cutter matching portion is a matching hole, and the push rod matching portion is a second protrusion penetrating the cutter matching portion.

14. The staple cartridge assembly according to claim 10, characterized in that: The first side and the second side of the cutter are respectively provided with a first protrusion; The first side and the second side of the cutter are respectively provided with a cutter matching portion, and the driving member is provided with a push rod corresponding to the cutter matching portion one by one.

15. A medical stapler, characterized in that: A nail magazine assembly comprising any one of claims 1 to 14.

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