Staple cartridge assembly and surgical instrument

Abstract

This invention discloses a staple cartridge assembly and a surgical instrument. The staple cartridge assembly includes a staple cartridge body with a cutting groove dividing it into two parts. Each part includes a staple exit surface with two rows of staple cavities arranged longitudinally, designated as a first row and a second row. Multiple anastomotic staples are disposed within each staple cavity, with the staple crowns arranged in an arc shape. Each staple cavity in the first row is arranged along a first arc, and each staple cavity in the second row is arranged along a second arc. The distance between the endpoints of the first and second arcs in the lateral direction is less than or equal to 0.5 mm, and the radii of the first and second arcs are greater than or equal to 1.5 mm and less than or equal to 8 mm. By optimizing the arrangement of the staple cavities to reduce the lateral width of the staple cartridge assembly, the width of the jaw assembly is reduced, facilitating the jaw assembly's entry into the body through the gap between adjacent ribs, thus simplifying surgery and reducing patient discomfort.

Description

Technical Field

[0001] This invention relates to the field of surgical instrument technology, and in particular to a staple cartridge assembly and a surgical instrument. Background Technology

[0002] Surgical staplers are commonly used medical instruments that replace manual suturing. Their main working principle is to use a scalpel to sever tissue and titanium staples to anastomose it, similar to a stapler. Depending on the body part they are used for, staplers can be categorized into various types. For surgical staplers, the working principle involves inserting a cannula of a precisely positioned trocar into the patient's body at the surgical site. This creates a longitudinal incision in the tissue, and staples are applied to the opposite sides of the incision, thereby severing and anastomosing the tissue.

[0003] The surgical instrument includes a jaw assembly, which comprises a staple cartridge seat and an anvil. The staple cartridge seat receives the staple cartridge assembly. The staple cartridge assembly includes a staple cartridge body and anastomotic staples disposed within the staple cartridge body. After being fired, the staple legs penetrate the tissue and are bent into shape under the pressure of the anvil. In thoracic surgery, the jaw assembly of the stapler is typically inserted into the thoracic cavity between two adjacent ribs to clamp, cut, and suture the tissue. Given the narrow gap between adjacent ribs, existing technology modifies the staple cartridge body from a conventional single-sided three-row staple chamber to a two-row staple chamber to reduce the width of the jaw assembly. Furthermore, the anastomotic staples in the two rows of staple chambers are curved staples to prevent bleeding and air leakage.

[0004] In actual surgical procedures, there may be situations where the gap between two adjacent ribs is narrower. Existing jaw components may still be unable to enter the gap between ribs or touch the ribs, causing damage to the intercostal nerves and affecting the normal progress of the surgery. Therefore, there is an urgent need for a jaw component with a narrower width. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention aims to provide a staple cartridge assembly and surgical instruments. The staple cartridge assembly is narrower, which makes the jaw assembly narrower, making it easier to pass through the gap between two adjacent ribs, which is beneficial to the operation.

[0006] This invention is achieved through the following technical solution: a staple cartridge assembly, comprising:

[0007] The staple cartridge body has a cutting groove that divides the staple cartridge body into two parts. Each part includes a staple outlet surface. The staple outlet surface has two rows of staple cavities arranged along the longitudinal direction, namely the first row of staple cavities and the second row of staple cavities.

[0008] Multiple anastomotic staples are respectively disposed in each of the staple cavities, and the staple crowns are arranged in an arc shape;

[0009] Each nail cavity in the first row of nail cavities is arranged along a first arc, and each nail cavity in the second row of nail cavities is arranged along a second arc; both the first arc and the second arc have concave sides and convex sides, the concave side of the first arc faces the second arc, the concave side of the second arc faces the first arc, the first arc and the second arc are offset in the longitudinal direction, and the endpoint of the first arc is opposite to the middle of the second arc;

[0010] The distance between the endpoints of the first arc and the second arc in the lateral direction is less than or equal to 0.5 mm, and the radii of the first arc and the second arc are greater than or equal to 1.5 mm and less than or equal to 8 mm.

[0011] Furthermore, the distance between the endpoint of the first arc and the endpoint of the second arc in the lateral direction is 0.2 mm.

[0012] Furthermore, the radii of the first and second arcs are greater than or equal to 1.5 mm and less than or equal to 7.7 mm.

[0013] Furthermore, the lengths of the first and second arcs in the longitudinal direction are greater than or equal to 3 mm and less than or equal to 4 mm, and the distance between the midpoints of two adjacent first and second arcs is greater than or equal to 3 mm and less than or equal to 4.5 mm.

[0014] Furthermore, the lengths of the first arc and the second arc in the longitudinal direction are 3.5 mm.

[0015] Furthermore, the distance between the midpoints of two adjacent first and second arcs is 3.83 mm. Furthermore, the staple cartridge seat and the anvil seat form a jaw assembly, the width of which is greater than or equal to 8 mm and less than or equal to 11 mm.

[0016] Furthermore, the staple cavity includes a staple cavity body and limiting grooves disposed on both sides of the staple cavity body. When the staple is disposed in the staple cavity, the two legs of the staple are respectively accommodated in the two limiting grooves. The limiting grooves have arc-shaped edges. The staple cavity body includes an arc-shaped wall with the same arcuate curvature as the staple crown.

[0017] In any of the first row of nail cavities, the first arc passes through the midpoint of the two arc-shaped sides and has the same curvature as the arc-shaped wall.

[0018] In any of the nail cavities in the second row, the second arc passes through the midpoint of the two arc-shaped sides and has the same curvature as the arc wall.

[0019] This embodiment also discloses a surgical instrument, including a jaw assembly, the jaw assembly including: a staple cartridge seat and a staple abutment rotatably connected to the staple cartridge seat, the staple cartridge seat being detachably mounted with the staple cartridge assembly as described above;

[0020] The anvil includes a mating part and a straight plate part. The mating part is rotatably connected to the staple cartridge seat, and the straight plate part is connected to the mating part. The width of the straight plate part in the transverse direction is less than or equal to 8 mm.

[0021] Furthermore, the width of the straight plate portion of the anvil is greater than or equal to 5.5 mm.

[0022] Furthermore, the surgical instrument also includes a rod assembly, and the anvil is provided with a plurality of nail pits. When the anvil is rotated to the closed position, each of the nail pits corresponds to a nail cavity of the nail cartridge assembly.

[0023] The maximum length of the nail pits distributed in the lateral direction is greater than or equal to 5 mm and less than or equal to 6 mm.

[0024] Furthermore, the width of the jaw assembly is greater than or equal to 8 mm and less than or equal to 11 mm, and the maximum width of the anvil in the width direction is less than or equal to the width of the jaw assembly.

[0025] Furthermore, the width of the jaw assembly is 10mm.

[0026] Furthermore, when the jaw assembly is in the closed state, its height is greater than or equal to 11 mm and less than or equal to 12.5 mm.

[0027] Furthermore, the surgical instrument also includes a shaft assembly connected between the jaw assembly and the operating assembly. The shaft assembly includes a joint segment connecting the jaw assembly and a connecting segment connecting the joint segment and the operating assembly. The outer diameter of the joint segment is greater than or equal to 8 mm and less than or equal to 11 mm. The outer diameter of the connecting segment is greater than or equal to 7 mm and less than or equal to 11 mm.

[0028] Furthermore, the outer diameter of the joint segment is 10 mm; the outer diameter of the connecting segment is 8.5 mm.

[0029] Furthermore, the surgical instrument also includes a detachable sled, which is detachably mounted to the anvil.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: by optimizing the arrangement of the staple cavity to reduce the width of the staple cartridge assembly in the lateral direction, and thus reducing the width of the jaw assembly, while ensuring that the anastomotic staples can play a role in preventing blood leakage and air leakage on the tissue or blood vessels, the width of the staple cartridge assembly can be reduced as much as possible, making it easier for the jaw assembly to enter the human body from the gap between two adjacent ribs, facilitating the operation, avoiding damage to the intercostal nerves, and thus reducing patient pain. Attached Figure Description

[0031] Figure 1 This is a front view of the surgical instrument according to the first embodiment of the present invention;

[0032] Figure 2 This is a top view of the surgical instrument according to the first embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the anvil extending between the tissue and the blood vessel according to the first embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the staple cartridge assembly according to the first embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the nail cavity, the first arc, and the second arc according to the first embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the staple cavity containing the staples according to the first embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the anastomotic staple suture tissue according to the first embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the arrangement of the first arc on the staple cartridge body according to the first embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the structure of the four nail cavities selected in the first embodiment of the present invention;

[0040] Figure 10 This is a schematic diagram of the structure of the first arc and the second arc according to the first embodiment of the present invention, showing the case where the radii of the first arc and the second arc are at their minimum.

[0041] Figure 11 This is a schematic diagram of the structure of the first arc and the second arc according to the first embodiment of the present invention, showing the case where the radius of the first arc and the second arc is 3mm;

[0042] Figure 12A schematic diagram of the structure of the first arc and the second arc according to the first embodiment of the present invention shows the case where the radius of the first arc and the second arc is 5mm;

[0043] Figure 13 This is a schematic diagram of the structure of the first arc and the second arc according to the first embodiment of the present invention, showing the case where the radii of the first arc and the second arc are at their maximum.

[0044] Figure 14 yes Figure 8 A partial schematic diagram of point A in the middle;

[0045] Figure 15 This is a schematic diagram of the anvil of the first embodiment of the present invention;

[0046] Figure 16 This is a schematic diagram of the jaw assembly according to the first embodiment of the present invention;

[0047] Figure 17 This is a schematic diagram of the anvil of the first embodiment of the present invention;

[0048] Figure 18 This is a top view of the anvil of the first embodiment of the present invention.

[0049] in:

[0050] 100. Jaw assembly; 110. Staple cartridge seat; 120. Staple anchor seat; 121. Mating part; 1211. Extension wall; 122. Straight plate part; 123. Staple recess; 124. Staple anchor seat groove; 200. Staple cartridge assembly; 210. Staple cartridge body; 211. Cutting groove; 212. Staple ejection surface; 213. Staple cavity; 2130. Staple cavity body; 2131. Limiting groove; 2132. Arc-shaped wall; 2333. Arc-shaped edge; 220. Anastomotic staple; 300. First row of staple cavities; 400. Second row of staple cavities; 500. First arc; A. Left first arc; B. Right first arc; 600. Second arc; C. Left second arc; D. Right second arc; 700, Operating components; 800, Pole assembly; 810, Joint segment; 820, Connecting segment; 900, Detachable sled; 1000, Tissue; 1010, Blood vessel; Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0052] It is important to understand that the terms "proximal" and "distal" used in this article are relative to the clinician manipulating the stapler's handle. "Proximal" refers to the part closer to the clinician, while "distal" refers to the part farther away. That is, the handle is proximal, and the jaw assembly is distal. For example, the proximal end of a component refers to the end relatively closer to the handle, and the distal end refers to the end relatively closer to the jaw assembly. The terms "upper" and "lower" are relative to the relative positions of the anvil and stapler seat on the jaw assembly; specifically, the anvil is "upper," and the stapler seat is "lower." However, staplers can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding an integral part, but movable connections are not excluded.

[0054] Example 1

[0055] The first embodiment of this application discloses a pinning cartridge component, such as Figure 1 and Figure 2 As shown, the staple cartridge assembly is installed in the jaw assembly. The jaw assembly 100 includes a staple cartridge seat 110 and an anvil seat 120 rotatably connected to the staple cartridge seat 110. The staple cartridge assembly 200 is detachably installed in the staple cartridge seat 110. Surgical instruments are used in thoracic surgery. During thoracic surgery, the jaw assembly 100 needs to be inserted into the body through the gap between two adjacent ribs. Therefore, the width of the jaw assembly 100 is relatively narrow—that is, the width of the staple cartridge seat 110, the width of the anvil seat 120, and the width of the staple cartridge assembly 200 are all relatively narrow—to better allow for insertion into the body through the gap between two ribs. This avoids pain caused by intercostal nerve damage due to a larger jaw assembly 100, facilitating surgery and reducing patient suffering.

[0056] Among them, such as Figures 4 to 6As shown, the staple cartridge assembly 200 includes a staple cartridge body 210 and a plurality of staples 220. The staple cartridge body 210 has a cutting groove 211 that divides the staple cartridge body 210 into two parts. Each part includes a staple exit surface 212, and each staple exit surface 212 has two rows of staple cavities 213 arranged along the longitudinal direction X, namely a first row of staple cavities 300 and a second row of staple cavities 400. The staple crowns of the staples 220 are arc-shaped, and each staple 220 is disposed in its respective staple cavity 213. In this embodiment, the second row of staple cavities 400 is located away from the cutting groove 211, and the first row of staple cavities 300 is located between the cutting groove 211 and the second row of staple cavities 400. The shapes of the first row of staple cavities 300 and the second row of staple cavities 400 are generally arc-shaped.

[0057] Setting two rows of nail cavities 213 on the nail outlet surface 212 of each part can reduce the width of the nail outlet surface 212, thereby reducing the width of the nail cartridge assembly 200. Figure 7 After the anastomotic staples 220 are fired, the arrangement of the anastomotic staples 220 on the tissue 1000 or blood vessel 1010 is largely the same as the arrangement of the staple chambers 213 on the staple cartridge body 210. In any row of anastomotic staples 220, there is a gap between two adjacent anastomotic staples 220. To prevent bleeding and air leakage from the incision, the line connecting the gap between two anastomotic staples 220 in the first row and the gap between any two anastomotic staples 220 in the second row intersects at least one anastomotic staple 220. That is, the blood flow and gas inside the tissue 1000 or blood vessel 1010 cannot flow out of the incision after passing through the gap between two adjacent anastomotic staples 220 in the first row and the gap between two adjacent anastomotic staples 220 in the second row, thus avoiding bleeding and air leakage from the incision of the tissue 1000 or blood vessel 1010.

[0058] In this embodiment, the surgical instrument's staple cartridge assembly 200 has a staple delivery surface 212 whose layout design of the staple cavity 213 further reduces the width of the staple cartridge body 210, i.e., the width of the staple cartridge body 210 in the lateral direction Y, while simultaneously ensuring that the anastomotic staples 220, after being fired, can prevent incision bleeding and air leakage. For example... Figure 5As shown, the first row of nail chambers 300 is arranged along the first arc 500, and the second row of nail chambers 400 is arranged along the second arc 600. Both the first arc 500 and the second arc 600 have concave and convex sides. The concave side of the first arc 500 faces the second arc 600, and the concave side of the second arc 600 faces the first arc 500. The first arc 500 and the second arc 600 are offset in the longitudinal direction X, which is the length direction of the nail cartridge assembly 200. Both the first arc 500 and the second arc 600 have two endpoints. The endpoint of the first arc 500 is opposite to the middle of the second arc 600. The middle of the second arc 600 refers to a segment of the arc in the middle of the second arc 600, not the midpoint of the second arc 600. The first row of nail cavities 300 is arranged along a first arc 500, meaning that the first row of nail cavities 300 is arranged along a set of first arcs 500. Each nail cavity in the first row of nail cavities 300 is arranged along a first arc 500. Each first arc 500 in the set of first arcs 500 has the same curvature and is arranged at intervals along the longitudinal direction X. Furthermore, the point of each first arc 500 closest to the tool groove essentially forms a straight line, which extends approximately along the longitudinal direction X. The second row of nail cavities 400 is arranged along a second arc 600, meaning that the second row of nail cavities 400 is arranged along a set of second arcs 600. Each nail cavity in the second row of nail cavities 400 is arranged along a second arc 600. Each second arc 600 in the set of second arcs 600 has the same curvature and is arranged at intervals along the longitudinal direction X. Furthermore, the point of each second arc 600 farthest from the tool groove essentially forms a straight line, which extends approximately along the longitudinal direction X.

[0059] The staple cavity 213 includes a staple cavity body 2130 and limiting grooves 2131 disposed on both sides of the staple cavity body 2130. When the staple 220 is disposed in the staple cavity 213, the two legs of the staple 220 are respectively accommodated in the two limiting grooves 2131. The limiting groove 2131 has an arc-shaped edge 2333, which is located on the side of the limiting groove 2131 away from the staple cavity body 2130. The staple cavity body 2130 includes an arc-shaped wall 2132 with the same curvature as the staple crown of the staple 220. In any staple cavity 213 of the first row of staple cavities 300, the first arc 500 passes through the midpoint of the two arc-shaped edges 2333 and has the same curvature as the arc-shaped wall 2132. In fact, the first arc 500 has the same curvature as the center line of the crown of the staple 220 located in the staple cavity 213, and the projections of the two on the exit surface 212 are largely the same. The first arc 500 represents the position of the crown of the staple 220 after the staple 220 in the first row of staple cavities 300 is fired.

[0060] Similarly, in any of the nail cavities 213 of the second row of nail cavities 400, the second arc 600 passes through the midpoint of the two arc edges 2333 and has the same curvature as the arc wall 2132. The second arc 600 represents the position of the staple crown of the staple 220 after it is fired in the second row of nail cavities 400. In fact, the dimensions of the staple 220 and the limiting groove 2131 have certain tolerances, which reduces the overlap between the projection of the first arc 500 on the nail exit surface 212 and the projection of the center line of the staple crown of the staple 220 on the nail exit surface 212. Since the overall size of the nail cavity 213 is small, the deviation between the first arc 500 and the center line of the staple crown of the staple 220 does not affect the subsequent judgment that the staple 220 can prevent blood leakage and air leakage by using the first arc 500 and the second arc 600.

[0061] Among them, the 220 staples can prevent bleeding and air leakage under the following conditions: Figures 9 to 13 As shown, four adjacent nail cavities 213 are selected. Two of the four nail cavities 213 are located in the first row and are adjacent, and the other two are located in the second row and are adjacent. The four selected nail cavities 213 have two first arcs 500 and two second arcs 600. The two endpoints of one first arc 500 are respectively opposite to the middle of the two second arcs 600, and the two endpoints of one second arc 600 are respectively opposite to the middle of the two first arcs 500. From left to right, the two first arcs 500 are left first arc A and right first arc B, and the gap between left first arc A and right first arc B is the first gap; the two second arcs 600 are left second arc C and right second arc D, and the gap between left second arc C and right second arc D is the second gap. The positional relationship between the left first arc A, right first arc B, left second arc C, and right second arc D is consistent with the positional relationship of the anastomotic staples 220 in the four selected staple cavities 213 after being fired and sutured onto the tissue 1000 or blood vessel 1010. Therefore, if the positional relationship between the left first arc A, right first arc B, left second arc C, and right second arc D can meet the conditions for preventing blood leakage and air leakage, then the anastomotic staples 220 sutured onto the tissue 1000 or blood vessel 1010 can also play the function of preventing blood leakage and air leakage.

[0062] The positional relationship between the left first arc A, the right first arc B, the left second arc C, and the right second arc D satisfies the condition of preventing blood and air leakage: any straight line passing through the first gap and the second gap intersects at least one arc, which means that the blood and air flow path will be blocked by the anastomosis staple 220.

[0063] Draw a straight line L, which is simultaneously tangent to the right first arc B and the left second arc C, or simultaneously tangent to the left first arc A and the right second arc D. This embodiment uses the example of line L being simultaneously tangent to the right first arc B and the left second arc C. Line L represents a blood and air flow path that can pass through the first and second gaps. If line L intersects the right second arc D and / or the left first arc A, it means that the blood flow along the path of line L is blocked by the anastomotic staple 220. It also means that any straight line passing through the first and second gaps will be blocked by the right second arc D and / or the left first arc A. The positional relationship of each staple cavity 213 serves to prevent blood leakage and air leakage. Figure 10 This is to minimize the radii of the first arc 500 and the second arc 600 within the width constraint of the existing staple cartridge body 210; Figure 13 This considers the case where the radii of the first arc 500 and the second arc 600 are maximized. For both cases, a Cartesian coordinate system is established to obtain the functions of line L, the left first arc A, the right first arc B, the left second arc C, and the right second arc D. The condition for line L to intersect with either the left first arc A or the right second arc D is as follows: Solve the functions of line L, the left first arc A, and the right second arc D together. If there are no solutions, it means that line L does not intersect with either the left first arc A or the right second arc D, and the positional relationship of each nail cavity 213 cannot function to prevent blood seepage and air leakage. If there is at least one solution, it means that line L intersects with the left first arc A and / or the right second arc D, and the positional relationship of each nail cavity 213 can function to prevent blood seepage and air leakage.

[0064] like Figure 14 As shown, based on the solution results of the above function, in this embodiment, the distance D1 between the endpoints of the first arc 500 and the second arc 600 in the lateral direction Y is less than or equal to 0.5 mm. The two endpoints of the first arc 500 are arranged in the longitudinal direction X, and the two endpoints of the second arc 600 are also arranged in the longitudinal direction X. The distance D1 between the endpoints of the first arc 500 and the second arc 600 in the lateral direction Y refers to the distance between any endpoint of the first arc 500 and any endpoint of the second arc 600 in the lateral direction Y. The radius R of the first arc 500 and the second arc 600 is greater than or equal to 1.5 mm and less than or equal to 8 mm; D1 and R are within the above range, which enables the positional relationship of each nail cavity 213 to play a role in preventing blood seepage and air leakage.

[0065] in Figure 10 In an embodiment where the radius R of the first arc 500 and the second arc 600 is equal to 1.5 mm, Figure 11 In this embodiment, the radius R of the first arc 500 and the second arc 600 is equal to 3 mm. Figure 12In this embodiment, the radius R of the first arc 500 and the second arc 600 is equal to 5 mm. Figure 13 This is an example where the radius R of the first arc 500 and the second arc 600 is equal to 8 mm.

[0066] Furthermore, the length D2 of the first arc 500 and the second arc 600 in the longitudinal direction X is greater than or equal to 3 mm and less than or equal to 4 mm. The distance D3 between the midpoints of two adjacent first arcs 500 and second arcs 600 is greater than or equal to 3 mm and less than or equal to 4.5 mm. Within this range, the positional relationship of each nail cavity 213 can serve to prevent blood leakage and air leakage.

[0067] In this embodiment, by optimizing the arrangement of the staple cavity 213 to reduce the width of the staple cartridge assembly 200 in the lateral direction Y, the width of the jaw assembly 100 is reduced. Under the premise of ensuring that the anastomotic staple 220 can play a role in preventing blood leakage and air leakage when sutured on the tissue 1000 or blood vessel 1010, the size of the jaw assembly 100 can be reduced as much as possible. In actual surgery, even if the gap between two adjacent ribs is narrow, the jaw assembly 100 can smoothly enter the gap. When inserted into the body through the gap between two ribs, it will not damage the nerves at the ribs, thereby avoiding postoperative intercostal pain in the patient.

[0068] Example 2

[0069] The first embodiment of this application discloses a surgical instrument, which can be a stapler, such as... Figure 1 and Figure 2 As shown, the surgical instrument includes: a jaw assembly 100, an operating assembly 700, and a lever assembly 800. The jaw assembly 100 includes a staple cartridge seat 110, a staple anchor 120 rotatably connected to the staple cartridge seat 110, and a staple cartridge assembly 200 as in Embodiment 1. The staple cartridge assembly 200 is detachably mounted to the staple cartridge seat 110. The staple anchor 120 rotates to switch the jaw assembly 100 between an open and closed state. When the jaw assembly 100 is in the closed state, it clamps human tissue.

[0070] like Figure 3 As shown, in the vascular anastomosis surgery, the arterial vessel 1010 is generally exposed between the tissues 1000. The anvil 120 needs to pass through the pulmonary vessel 1010 and extend between the vessel 1010 and the tissue 1000 to separate the vessel 1010 from the tissue 1000. However, the space between the tissues 1000 is limited, making it difficult for the anvil 120 to extend between the vessel 1010 and the tissue 1000 to separate the vessel 1010. In this embodiment, the surgical instruments, including the staple cartridge assembly 200 and the anvil 120, have relatively small widths, facilitating the insertion of the anvil 120 between the vessel 1010 and the tissue 1000 to separate the vessel 1010, thus simplifying the surgery and reducing patient discomfort.

[0071] like Figure 15 As shown, the anvil 120 includes a mating part 121 and a straight plate part 122. The mating part 121 is rotatably connected to the staple cartridge seat 110, and the straight plate part 122 is connected to the mating part 121. The anvil 120 extends between the blood vessel 1010 and the tissue 1000, and the separation of the tissue 1000 and the blood vessel 1010 is achieved by the straight plate part 122. In this embodiment, the width of the straight plate part 122 is less than or equal to 8 mm. The smaller the width of the straight plate part 122, the more beneficial it is to separate the tissue 1000 and the blood vessel 1010, which is beneficial to the operation. In this embodiment, the staple cartridge assembly as in Embodiment 1 is used. By optimizing the arrangement of the staple cavity 213 to reduce the width of the staple cartridge assembly 200 in the transverse direction Y, the width of the straight plate part 122 is reduced. Under the premise of ensuring that the anastomotic staples 220 can play a role in preventing blood leakage and air leakage when sutured on the tissue 1000 or the blood vessel 1010, the size of the straight plate part 122 can be reduced as much as possible, which is beneficial to the operation.

[0072] like Figure 16 As shown, the mating part 121 is used to mate with the staple cartridge seat 110. Extending walls 1211 are provided on both sides of the mating part 121, extending towards the staple cartridge seat 110. When the jaw assembly 100 is open, the extending walls 1211 remain partially attached to the staple cartridge seat 110 to conceal the cutting blade and prevent the cutting blade from cutting human tissue 1000 or blood vessels 1010 when the jaw assembly 100 moves within the human body. The mating part 121 is relatively wide, and the straight plate part 122 can be narrowed due to the reduced width of the staple cartridge body 210 in the width direction. The connection between the mating part 121 and the straight plate part 122 uses an arc-shaped transition to avoid cutting the tissue 1000.

[0073] like Figure 15 As shown, the anvil 120 has multiple nail pits 123, some of which are located in the straight plate portion 122 and others in the mating portion 121. When the anvil 120 is rotated to the closed position, each nail pit 123 corresponds to each nail cavity 213 of the nail cartridge assembly 200. When the matching nail 220 is located in the nail cavity 213, it is opposite to the nail pit 123 corresponding to the nail cavity 213; when the matching nail 220 is fired, the matching nail 220 disengages from the nail cavity 213 and is bent into shape under the action of the nail pit 123. In the nail cartridge assembly 200, the width of the nail cavity 213 in the transverse direction Y is small, which also makes the width of the nail pit 123 in the transverse direction Y small, thereby making the width of the straight plate portion 122 small.

[0074] The anvil seat 120 has an anvil seat groove 124, which is used to cooperate with the cutting blade to position the cutting blade during its movement, thereby improving the stability of the cutting blade's movement. When the jaw assembly 100 is in the closed state, the anvil seat groove 124 corresponds to the blade path groove 211 of the staple cartridge assembly 200. The anvil seat 120 has two rows of staple pits 123 on both sides of the anvil seat groove 124, which correspond to the two rows of staple cavities 213 on both sides of the blade path groove 211 of the staple cartridge assembly 200, respectively. In this embodiment, the maximum length D4 of the staple pits 123 distributed in the transverse direction Y on the anvil seat 120 is greater than or equal to 5 mm and less than or equal to 6 mm. The maximum length D4 of the staple pits 123 distributed in the transverse direction Y is: the distance between the uppermost and lowermost points of the staple pits 123 in the transverse direction Y. Furthermore, the width of the straight plate portion 122 of the anvil 120 is greater than or equal to 5.5 mm, and the wall thickness of the straight plate portion 122 is at least 0.5 mm, in order to ensure the stability of firing.

[0075] In a preferred embodiment, the distance D1 between the endpoints of the first arc 500 and the second arc 600 is 0.2 mm, the length D2 of the first arc 500 and the second arc 600 in the longitudinal direction X is 3.5 mm, the distance D3 between the midpoints of two adjacent first arcs 500 and second arcs 600 is 3.83 mm, and the radius R of the first arc 500 and the second arc 600 is greater than or equal to 1.5 and less than or equal to 7.7 mm, preferably R equal to 7.7 mm. These dimensions allow for a smaller width of the staple cartridge body 210 while ensuring its strength, thereby reducing the width of the straight plate portion 122 of the anvil 120. The minimum dimension of the anvil 120 is a width of 5.5 mm for the straight plate portion 122 in the transverse direction Y.

[0076] Furthermore, the width of the jaw assembly 100 is greater than or equal to 8 mm and less than or equal to 11 mm. The width of the jaw assembly 100 is the maximum lateral distance between the two sides of the staple cartridge seat 11041. The arrangement of the staple cavities 213 reduces the width of the staple cartridge assembly 200 and the staple cartridge seat 110, thereby allowing the width of the jaw assembly 100 to match the distance between the patient's two ribs. This ensures that the jaw assembly 100 will not damage the nerves at the ribs when inserted into the body through the gap between the two ribs, thus avoiding postoperative intercostal pain in the patient. In a preferred embodiment, the width of the jaw assembly 100 is 10 mm.

[0077] In one embodiment, the maximum width of the anvil 120 in the width direction is less than or equal to the width of the jaw assembly 100. Figure 17 and Figure 18 As shown, the width of the straight plate portion 122 in the anvil 120 is the same as the width of the mating portion 121, which is greater than or equal to 8 mm and less than or equal to 11 mm.

[0078] Furthermore, when the jaw assembly 100 is in the closed state, its height is greater than or equal to 11 mm and less than or equal to 12.5 mm. The height direction is the thickness direction of the staple cartridge assembly 200, and the height of the jaw assembly 100 in the closed state is the maximum distance in the height direction between the anvil 120 and the staple cartridge seat 110. While meeting strength requirements and surgical needs, the height of the jaw assembly 100 after closure is minimized to prevent damage to nerves at the ribs when the jaw assembly 100 is inserted into the body through the gap between two ribs, thereby avoiding postoperative intercostal pain in the patient.

[0079] It is worth noting that, such as Figure 1 and Figure 2 As shown, the lever assembly 800 is connected between the jaw assembly 100 and the operating assembly 700. The lever assembly 800 includes a joint segment 810 and a connecting segment 820. The joint segment 810 is connected to the jaw assembly 100, and the connecting segment 820 is connected between the joint segment 810 and the operating assembly 700. During surgery, part of the lever assembly 800 enters the body through the gap between two adjacent ribs and may move. Therefore, the smaller the outer diameter of the lever assembly 800, the more beneficial it is for the surgery. The joint segment 810 is provided with a joint head steering structure to facilitate the steering of the jaw assembly 100. The outer diameter of the joint segment 810 is greater than or equal to 8 mm and less than or equal to 11 mm. During surgery, part of the connecting segment 820 is always located in the gap between two adjacent ribs and may move, shift, or rotate. Therefore, the outer diameter of the connecting segment 820 is further reduced to meet the movement requirements. In this embodiment, the outer diameter of the connecting segment 820 is greater than or equal to 7 mm and less than or equal to 11 mm.

[0080] Furthermore, the surgical instrument also includes a detachable sled 900, which is detachably mounted to the anvil 120. The detachable sled 900 includes an mounting section and a working section. The working section narrows at its front end to better separate tissue from blood vessels and guide the anvil 120 into the space between the tissue 1000 and the blood vessel 1010. The mounting section and the working section are integrally formed and detachably connected to the distal end of the anvil 120, preferably with an elastic fit. That is, the mounting section connects to the anvil 120 under the action of elasticity and disengages from the anvil 120 when the elasticity is overcome, ensuring reliable connection and easy assembly / disassembly. The source of the elasticity can be the elasticity of the mounting section itself; alternatively, other elastic bodies abut against the mounting section, providing elasticity to the mounting section. For the specific structure of the detachable sled 900, please refer to the applicant's prior application CN202010261022.9.

[0081] The width of the mounting section is approximately the same as or smaller than the width of the straight plate section 122. The detachable sled 900 allows the anvil seat 120 to better extend between the blood vessel 1010 and the tissue 1000, which is beneficial for the operation.

[0082] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0083] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A staple cartridge assembly, characterized in that, include: The staple cartridge body has a cutting groove that divides the staple cartridge body into two parts. Each part includes a staple outlet surface. The staple outlet surface has two rows of staple cavities arranged along the longitudinal direction, namely the first row of staple cavities and the second row of staple cavities. Multiple anastomotic staples are respectively disposed in each of the staple cavities, and the staple crowns are arranged in an arc shape; Each nail cavity in the first row of nail cavities is arranged along a first arc, and each nail cavity in the second row of nail cavities is arranged along a second arc; both the first arc and the second arc have concave sides and convex sides, the concave side of the first arc faces the second arc, the concave side of the second arc faces the first arc, the first arc and the second arc are offset in the longitudinal direction, and the endpoint of the first arc is opposite to the middle of the second arc; The distance between the endpoints of the first arc and the second arc in the lateral direction is less than or equal to 0.5 mm, and the radii of the first arc and the second arc are greater than or equal to 1.5 mm and less than or equal to 8 mm.

2. The staple cartridge assembly according to claim 1, characterized in that, The distance between the endpoint of the first arc and the endpoint of the second arc in the lateral direction is 0.2 mm.

3. The staple cartridge assembly according to claim 2, characterized in that, The radii of the first and second arcs are greater than or equal to 1.5 mm and less than or equal to 7.7 mm.

4. The staple cartridge assembly according to claim 1, characterized in that, The lengths of the first and second arcs in the longitudinal direction are greater than or equal to 3 mm and less than or equal to 4 mm, and the distance between the midpoints of two adjacent first and second arcs is greater than or equal to 3 mm and less than or equal to 4.5 mm.

5. The staple cartridge assembly according to claim 4, characterized in that, The lengths of the first and second arcs in the longitudinal direction are 3.5 mm.

6. The staple cartridge assembly according to claim 4, characterized in that, The distance between the midpoints of two adjacent first and second arcs is 3.83 mm.

7. The staple cartridge assembly according to claim 1, characterized in that, The staple cavity includes a staple cavity body and limiting grooves on both sides of the staple cavity body. When the staple is placed in the staple cavity, the two legs of the staple are respectively accommodated in the two limiting grooves. The limiting grooves have arc-shaped edges. The staple cavity body includes an arc-shaped wall with the same arcuate curvature as the staple crown. In any of the first row of nail cavities, the first arc passes through the midpoint of the two arc-shaped sides and has the same curvature as the arc-shaped wall; In any of the nail cavities in the second row, the second arc passes through the midpoint of the two arc-shaped sides and has the same curvature as the arc-shaped wall.

8. A surgical instrument, characterized in that, The device includes a jaw assembly comprising: a staple cartridge seat and a staple anchor rotatably connected to the staple cartridge seat, wherein the staple cartridge seat is detachably mounted with the staple cartridge assembly as described in any one of claims 1-7.

9. The surgical instrument according to claim 8, characterized in that, The anvil includes a mating part and a straight plate part. The mating part is rotatably connected to the staple cartridge seat, and the straight plate part is connected to the mating part. The width of the straight plate part in the transverse direction is less than or equal to 8 mm.

10. The surgical instrument according to claim 9, characterized in that, The width of the straight plate portion of the anvil is greater than or equal to 5.5 mm.

11. The surgical instrument according to claim 8, characterized in that, The anvil is provided with a plurality of nail pits. When the anvil is rotated to the closed position, each nail pit corresponds to a nail cavity of the nail cartridge assembly. The maximum length of the nail pits distributed in the lateral direction is greater than or equal to 5 mm and less than or equal to 6 mm.

12. The surgical instrument according to claim 8, characterized in that, The width of the jaw assembly is greater than or equal to 8 mm and less than or equal to 11 mm, and the maximum width of the anvil in the width direction is less than or equal to the width of the jaw assembly.

13. The surgical instrument according to claim 12, characterized in that, The width of the jaw assembly is 10mm.

14. The surgical instrument according to claim 8, characterized in that, When the jaw assembly is in the closed state, its height is greater than or equal to 11 mm and less than or equal to 12.5 mm.

15. The surgical instrument according to claim 8, characterized in that, The surgical instrument further includes a shaft assembly connected between the jaw assembly and the operating assembly. The shaft assembly includes a joint segment connecting the jaw assembly and a connecting segment connecting the joint segment and the operating assembly. The outer diameter of the joint segment is greater than or equal to 8 mm and less than or equal to 11 mm. The outer diameter of the connecting segment is greater than or equal to 7 mm and less than or equal to 11 mm.

16. The surgical instrument according to claim 15, characterized in that, The outer diameter of the joint segment is 10 mm; the outer diameter of the connecting segment is 8.5 mm.

17. The surgical instrument according to claim 8, characterized in that, The surgical instrument also includes a detachable sled, which is detachably mounted to the anvil.

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