CARTUCE FOR SURGICAL CLIPS WITH POKA-YOKE INSTALLATION MARKS

Description

FIELD

[0001] The present disclosure relates to the field of surgical instruments, in particular, to the field of surgical staplers / anastomats.BACKGROUND

[0002] A surgical stapler / anastomat is often used to deploy staples into tissue for reducing or eliminating tissue bleeding, for example, it is necessary to seal the tissue as the tissue being cut in order to promote healing. A surgical stapler / anastomat (such as a linear stapler / anastomat, a right-angle stapler / anastomat) may comprise an end effector assembly having a staple cartridge portion and a staple anvil portion, the end effector assembly is configured to secure the tissue between the staple cartridge portion and the staple anvil portion, wherein the staple cartridge portion comprises a replaceable staple cartridge configured to removably store surgical staples therein, and the staple anvil portion comprises staple forming pockets for forming the staples. Such surgical stapler / anastomat generally comprises a closure system that moves one of the staple cartridge portion and the staple anvil portion relative to the other, and a staple driver for firing the staples.

[0003] During use, the staple cartridge portion and the staple anvil portion of the end effector assembly of the surgical stapler / anastomat are closed to form a close configuration, in order to capture the tissue between the staple cartridge portion and the staple anvil portion. Then, the staple driver pushes the staples to deploy from the staple cartridge, pass through the tissue, and to be formed against the staple forming pockets of the staple anvil portion, so as to seal tissue layers together. The staples are usually deployed in form of several staple lines or staple rows in order to secure the tissue layers together more reliably. The end effector assembly may comprise or not comprise a cutting member that can be advanced between the staple lines in order to cut the tissue after the tissue layers have been sealed together.

[0004] The staple cartridges and the surgical instruments usually come in a variety of models for different tissue sites and situations. A certain model of the staple cartridge may be used for one or more models of surgical instruments. In the case that an incompatible staple cartridge is installed in the surgical instrument or a compatible staple cartridge is installed in the surgical instrument in an incorrect direction, it may affect the tissue sealing quality, cause the surgical instrument to malfunction, or even damage the surgical instrument and staple cartridge.

[0005] Therefore, a staple cartridge with installation poka-yoke function is needed to avoid the above situation.

[0006] EP 0 537 572 A2 discloses a locking device for a surgical stapling or fastening instrument for applying surgical fasteners to tissue. The locking device is positioned on the jaw mechanism of the fastening instrument and engages a cartridge when the cartridge includes fasteners, and pivots through the cartridge after the fasteners have been fired to prevent the cartridge carrying jaw from being approximated into a firing position when the cartridge is empty. US 4,568,009 discloses a surgical fastener applying apparatus including an actuator and a removable surgical fastener containing cartridge. The cartridge fits loosely into a cartridge holder part of the actuator which translates linearly toward or away from an anvil part of the actuator. As the cartridge holder translates toward the anvil, the cartridge is automatically brought into alignment and registration with the anvil. EP 1 552 791 A1 discloses a cartridge retainer for a curved cutter stapler. EP 3 730 069 A1 discloses a staple retainer for a surgical staple cartridge unit which includes a body having first and second body sides configured to be positioned within an aperture defined between an anvil and a deck of the cartridge unit such that the first body side confronts the anvil and the second body side confronts the deck. The second body side is configured to retain staples within openings in the deck. A first protrusion at the first body side is configured to contact the anvil at a first location, and a second protrusion at the first body side is configured to contact the anvil at a second location. The protrusions are configured to resiliently deflect toward the second body side in response to the staple retainer being positioned within the aperture, and are further configured to cooperate with the second body side to maintain a predetermined distance between the anvil and the deck.SUMMARY

[0007] The present disclosure provides a surgical staple cartridge with installation poka-yoke features, the poka-yoke features are configured to prevent an incorrect model of staple cartridge from being installed into a surgical instrument or a correct model of staple cartridge from being installed into the surgical instrument along an incorrect direction, and to indicate a user to install a correct model of staple cartridge along a correct installation direction. Moreover, in certain models of surgical instruments, a staple driver of the surgical instrument is locked by a lock device, which can be unlocked by the staple cartridge installed in place. Therefore, when the surgical staple cartridge with the installation poka-yoke features provided by the present disclosure is installed in an incompatible surgical instrument, the lock device will not be unlocked, so that the surgical instrument will not be able to fire.

[0008] In particular, the present invention provides a surgical staple cartridge as recited in claim 1. Optional features are recited in the dependent claims.

[0009] In another aspect, the present invention provides a closure member for a surgical instrument as recited in claim 12. Optional features are recited in the dependent claims.

[0010] In a further aspect, the present invention also provides a surgical instrument as recited in claim 19.BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present disclosure and its features and advantages will be better understood with reference to the following description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings. In the following description and drawings, similar components are indicated with similar reference signs. The figures are not necessarily drawn to scale, and for the sake of clarity and conciseness, some parts may be omitted, and some figures may be drawn in an exaggerated or sketchy way. Fig. 1 exemplarily shows one side of a surgical staple cartridge according to a preferred embodiment of the present disclosure; Fig. 2 exemplarily shows another side of the surgical staple cartridge shown in Fig. 1; Fig. 3 exemplarily shows a bottom view of the surgical staple cartridge shown in Fig. 1; Fig. 4 exemplarily shows a side view of the surgical staple cartridge of Fig. 1 when installed in a surgical stapler according to the present disclosure; Fig. 5 is an enlarged partial cross-sectional view of the surgical stapler shown in Fig. 4 with the surgical staple cartridge installed; Fig. 6 exemplarily shows a surgical stapler without a surgical staple cartridge; Fig. 7 exemplarily shows one side of a surgical staple cartridge according to a preferred embodiment of the present disclosure; Fig. 8 exemplarily shows another side of the surgical staple cartridge shown in Fig. 7; Fig. 9 exemplarily shows a perspective view of the surgical staple cartridge shown in Fig. 7; Fig. 10 exemplarily shows an enlarged view of an end effector portion of the surgical stapler shown in Fig. 6, wherein the surgical stapler is not equipped with a surgical staple cartridge; Fig. 11 exemplarily shows an enlarged view of the end effector portion of the surgical stapler shown in Fig. 6, wherein the surgical stapler is equipped with the surgical staple cartridge according to the present disclosure; Fig. 12 exemplarily shows an enlarged perspective view of the end effector portion of the surgical stapler of Fig. 6; Fig. 13 exemplarily shows the cooperation between the surgical staple cartridge of the present disclosure and a compatible surgical instrument; Fig. 14 exemplarily shows the interference between the surgical staple cartridge of the present disclosure and incompatible surgical instruments; Fig. 15 exemplarily shows the interference between a surgical instrument which is compatible with the surgical staple cartridge of the present disclosure and other existing surgical staple cartridges; Fig. 16 exemplarily shows a side view of one side of a surgical staple cartridge according to another preferred embodiment of the present disclosure; Fig. 17 exemplarily shows a bottom view of the surgical staple cartridge shown in Fig. 16; Fig. 18 exemplarily shows an enlarged view of an end effector portion of a surgical instrument which is compatible with the surgical staple cartridge shown in Fig. 16, wherein the surgical instrument is equipped with the surgical staple cartridge shown in Fig. 16. DETAILED DESCRIPTION OF EMBODIMENTS

[0012] Next, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Described herein are merely exemplary embodiments in accordance with the present disclosure, and those skilled in the art will envisage other ways to implement the present disclosure on the basis of the exemplary embodiments described herein, which also fall within the scope of the present disclosure.

[0013] Fig. 1 to Fig. 3 exemplarily show a surgical staple cartridge according to one embodiment of the present disclosure, wherein the surgical staple cartridge comprises side walls 20, 30 which extend along a longitudinal direction L (an installation direction of the staple cartridge in a surgical instrument), and the two side walls 20, 30 are arranged in parallel and opposite to each other. A first protrusion 21 is provided on an outer surface of the first side wall 20 at a position adjacent to a top end of the first side wall 20, the first protrusion 21 is used to match with a notch at a top end of a first closure plate of the surgical instrument, in order to guide the surgical staple cartridge to be correctly installed, while preventing an incorrect model of surgical staple cartridge from being installed into the surgical instrument.

[0014] Referring to Fig. 2, a second protrusion 31 is provided on an outer surface of the second side wall 30 at a position adjacent to a top end of the second side wall 30, the second protrusion 31 is used to match with a notch at a top end of a second closure plate of the surgical instrument, in order to guide the surgical staple cartridge to be correctly installed, while preventing an incorrect model of surgical staple cartridge from being installed into the surgical instrument.

[0015] The protrusions 21, 31 shown in the figures are of generally inverted triangular profiles, wherein a vertex of the triangular profile faces towards the installation direction of the staple cartridge, which is helpful to guide the staple cartridge to be correctly installed in the surgical instrument. The first protrusion 21 is further provided with a recess area 22 having substantially the same profile as that of the first protrusion 21, and the recess area 22 may be used to indicate the installation direction of the surgical staple cartridge. Therefore, the recess area 22 may have other profiles as long as it can indicate the installation direction of the surgical staple cartridge for the user. A similar recess area 32 is provided in the second protrusion 31.

[0016] Further, the surgical staple cartridge of the present disclosure may further comprise slots 23, 33 respectively positioned on the outer surfaces of the two side walls 20, 30. The slots 23, 33 are respectively positioned below the protrusions 22, 32, and extend along the installation direction L of the staple cartridge. The slots 23, 33 are asymmetrically arranged on the lateral sides of the surgical staple cartridge with respect to each other, and as shown in Fig. 3, the slot 23 is more distally positioned (i.e., away from an operator) than the slot 33. Of course, in an alternative embodiment, the slot 23 may be more proximally positioned (that is, close to the operator) than the slot 33. The slot 23 and the slot 33 may also be symmetrically arranged with respect to each other on lateral sides of the surgical staple cartridge. The slots may cooperate with ribs on inner sides of the closure plates of the surgical instrument, thus enabling the ribs to be received in the slots, which on one hand may be used to prevent the staple cartridge from being installed in an incompatible model of surgical instrument(that is, the position of the ribs on the inner side of the closure plates of the surgical instrument does not match with the position of the slots on the staple cartridge), and on the other hand, may be used to assist the closure plate to push the staple cartridge.

[0017] Fig. 4 and Fig. 5 show that the staple cartridge of Fig. 1 is installed in a compatible model of surgical instrument, wherein the protrusions 21, 31 are respectively received in the notches of the corresponding closure plates, and the ribs on the inner sides of the two closure plates of the surgical instrument are slidably received in the corresponding slots 23, 33.

[0018] In some embodiments, a mis-installation of the staple cartridge may further be prevented by changing positions of the protrusions and the notches of the closure plates described above. For example, when the protrusions 21, 31 and the notches of the corresponding closure plates are positioned to a more proximal position along a proximal direction (that is, more close to the operator, a right direction shown in Fig. 4), a staple cartridge with the protrusions arranged at more distal positions will not be able to install, because distal ends of the closure plates will abut against or interfere with corresponding portions of the staple cartridge, causing that the protrusions of the staple cartridge cannot align with and be received in the notches of the closure plates which are proximally positioned relative to the protrusions.

[0019] In some models of surgical instruments, the surgical instrument comprises a lock device for locking a staple driver, wherein the lock device may be unlocked by the staple cartridge installed in place, for example, by engagement between the lock device and the bottom portion of the staple cartridge. Therefore, when the surgical staple cartridge with installation poka-yoke features provided by the present disclosure is installed in an incompatible surgical instrument, the lock device will not be unlocked because the staple cartridge can't be installed in place along the installation direction, so that the surgical instrument cannot fire.

[0020] In a further preferred embodiment, open tip ends of the slots 23, 33 may further have funnel-shaped flared sections 26, 36 to assist the alignment of the slots with the ribs, so as to facilitate the installation of the staple cartridge.

[0021] Fig. 6 exemplarily shows a surgical stapler 100 according to the present disclosure, Fig. 7 and Fig. 8 exemplarily show side views of both sides of a surgical staple cartridge 10 according to the present disclosure, wherein the surgical staple cartridge 10 can be removably installed in a surgical stapler like the surgical stapler 100 in Fig. 6.

[0022] As shown in Fig. 7, the surgical staple cartridge 10 comprises side walls 20, 30 extending along a longitudinal direction L (an installation direction of the staple cartridge in a surgical instrument), the side walls 20, 30 being arranged in parallel and opposite to each other. A first protrusion 21 is provided on an outer surface of the first side wall 20 at a position adjacent to a top end of the first side wall 20, the first protrusion 21 is used to match with a first notch 51 at a top end of a first closure plate 50 of the surgical instrument 100, in order to guide the surgical staple cartridge to be correctly installed while preventing an incorrect model of the surgical staple cartridge from being installed into the surgical instrument 100 (see Fig. 10 and Fig. 11).

[0023] As further shown in Fig. 8, a second protrusion 31 is provided on an outer surface of the second side wall 30 at a position adjacent to a top end of the second side wall 30, the second protrusion 31 is used to match with a second notch 61 at a top end of a second closure plate 60 of the surgical instrument, in order to guide the surgical staple cartridge to be correctly installed while preventing an incorrect model of surgical staple cartridge from being installed into the surgical instrument 100 (see Fig. 12).

[0024] It will be understood that in the staple cartridge of the present disclosure, it is not necessary to provide the protrusions in both side walls, and the purpose of the present disclosure may also be achieved by providing the protrusion on only one of the side walls.

[0025] The protrusions 21, 31 shown in the figures are of generally inverted triangular profiles, wherein a vertex of the triangular profile faces towards the installation direction of the staple cartridge, which is helpful to guide the staple cartridge to be correctly installed in the surgical instrument. As further shown in Fig. 9, the first protrusion 21 is further provided with a recess area 22 having substantially the same profile as that of the first protrusion 21, and the recess area 22 may be used to indicate the installation direction of the surgical staple cartridge. Therefore, the recess area 22 may have other profiles as long as it can indicate the installation direction of the surgical staple cartridge for the user. A similar recess area 32 is provided in the second protrusion 31.

[0026] According to the embodiments of the present disclosure, it is conceivable that the protrusions 21, 31 may also have other profiles, such as a substantially arc profile or trapezoidal profile, and a tapered end of the arc profile or trapezoidal profile is preferably oriented towards the installation direction of the surgical staple cartridge, so as to facilitate the guidance of the proper installation of the staple cartridge.

[0027] Referring to Fig. 10 and Fig. 12, the notches 51, 61 for receiving the protrusions 21, 31 are respectively provided on the top ends of the first closure plate 50 and the second closure plate 60 in the end effector of the surgical instrument 100. Fig. 11 shows a condition where the staple cartridge 10 is correctly installed in the surgical instrument, wherein the protrusions 21, 31 are respectively received in the notches 51, 61. As described above, although the notches 51, 61 shown in the figures have a generally triangular profile, the notches 51, 61 may also have other profiles as long as they can match with the profiles of the protrusions 51, 61.

[0028] It is conceivable that the protrusions 21, 31 may have different profiles from each other, and correspondingly, the notches 51, 61 may also have different profiles from each other.

[0029] Further, the surgical staple cartridge of the present disclosure may further comprise slots 23, 33 respectively provided on the outer surfaces of the side walls 20, 30. The slots 23, 33 are respectively positioned below the protrusions 22, 32, and extend along the installation direction L of the staple cartridge. The slot may cooperate with ribs on an inner side of the closure plate of the surgical instrument, which on one hand may be used to prevent the staple cartridge from being installed in an incompatible model of surgical instrument, and on the other hand, may be used to assist the closure plate to push the staple cartridge.

[0030] As shown in Fig. 7 and Fig. 8, the slot 23 comprises two portions 24 and 25, wherein the slot 25 is wider than the slot 24 and one side of the slot 25 is aligned with the same side of the slot 24. Similarly, the slot 33 comprises two portions 34 and 35, wherein the slot 35 is wider than the slot 34 and one side of the slot 35 is aligned with the same side of the slot 34. Correspondingly, the inner sides of the closure plates 50, 60 of the surgical instrument 100 are respectively provided with two ribs or two rows of ribs extending along the installation direction L (a longitudinal direction) of the staple cartridge and mutually staggered along a driving direction (a lateral direction) of the closure plates. As shown in the figures, an inner surface of the closure plate 50 is provided with ribs 54, 55 which are laterally offset from each other, and an inner surface of the closure plate 60 is provided with ribs 64, 65 which are laterally offset from each other. When the surgical staple cartridge is installed between the closure plate 50 and the closure plate 60 along the installation direction L, the slot 24 receives the rib 54, and the slot 25 receives the rib 55 which is laterally offset relative to the rib 54, and similarly, on the other side, the slot 34 receives the rib 64, and the slot 35 receives the rib 65 which is laterally offset relative to the rib 64, thereby enabling the staple cartridge to be installed in place on the surgical instrument. It will be understood by those skilled in the art that although only one rib 54, 55, 64, 65 is shown in the figures, more than one ribs 54, 55 arranged in rows may be provided on the inner surface of the closure plate 50, and more than one ribs 64, 65 arranged in rows may also be provided on the inner surface of the closure plate 60.

[0031] Fig. 13 exemplarily shows the cooperation between the surgical staple cartridge according to the present disclosure and a compatible surgical instrument. When the staple cartridge is installed along the installation direction L, the rib 54 firstly slides through the slot portion 25 and then slides into the slot portion 24, and the rib 55 which is laterally staggered with the rib 54 slides into a laterally offset portion of the slot portion 25; and on the other side, the rib 64 firstly slides through the slot portion 35 and then slides into the slot portion 34, and the rib 65 which is laterally staggered with the rib 64 slides into a laterally offset portion of the slot portion 35.

[0032] In a further preferred embodiment, as shown in Fig. 7 and Fig. 8, open tip ends of the slots 25, 35 may further have funnel-shaped flared sections 26, 36 to assist the alignment of the slots with the ribs, so as to facilitate the installation of the staple cartridge.

[0033] After the surgical staple cartridge 10 has been correctly installed between a pair of the closure plates 50, 60 of the surgical instrument 100, the surgical staple cartridge 10 may be moved towards the staple anvil portion 70 (see Fig. 10) of the surgical instrument under the pushing of the closure plates, so as to clamp tissue between the surgical staple cartridge and the staple anvil portion for subsequent stapling and cutting operations.

[0034] It will be understood that in the staple cartridge of the present disclosure, it is not necessary to provide the slots 23, 33 in both side walls 20, 30, and the purpose of the present disclosure can also be achieved by providing the slot in only one side wall. In addition, a shape of the slot 23 may also be different from that the slot 33, or they can be asymmetrically arranged.

[0035] Fig. 14 exemplarily shows that the staple cartridge according to the present disclosure is installed in incompatible surgical instruments, wherein L indicates a left side wall of the staple cartridge and left closure plates of surgical instruments, and R indicates a right side wall of the staple cartridge and right closure plates of surgical instruments. In Example (a) of Fig. 14, an upper rib on the left closure plate of an incompatible surgical instrument is incapable of being received in a slot on the left side wall 20 of the staple cartridge of the present disclosure, and an upper rib on the right closure plate of the incompatible surgical instrument is incapable of being received in a slot on the right side wall 30 of the staple cartridge of the present disclosure; in Example (b), neither the upper rib nor the lower rib of the left closure plate of an incompatible surgical instrument is capable of being received in the slot of the left side wall 20 of the staple cartridge of the present disclosure; In Example (c), neither the upper rib nor the lower rib of the right closure plate of an incompatible surgical instrument is capable of being received in the slot of the right side wall 30 of the staple cartridge of the present disclosure; In Example (d), the upper rib of the left closure plate of an incompatible surgical instrument is incapable of being received in the slot of the left side wall 20 of the staple cartridge of the present disclosure. Due to the above-mentioned various interferences, the surgical staple cartridge according to the present disclosure is incapable of being installed in incompatible surgical instruments.

[0036] Fig. 15 exemplarily shows the interference between a surgical instrument which is compatible with the surgical staple cartridge of the present disclosure and other existing surgical staple cartridges, wherein L indicates left side walls of staple cartridges and a left closure plate of the surgical instrument, and R indicates right side walls of staple cartridges and a right closure plate of the surgical instrument. As shown in the figure, slots on the left side walls and the right side walls of the existing surgical staple cartridges are constant in width along their lengths. In Example (a) of Fig. 15, all ribs on the left closure plate 50 and the right closure plate 60 of the surgical instrument is incapable of being received in slots of an incompatible surgical staple cartridge; in Example (b), an upper rib 54 of the left closure plate 50 of the surgical instrument is incapable of being received in a slot of an incompatible surgical staple cartridge, and an lower rib 65 of the right closure plate 60 is incapable of being received in a slot of the incompatible surgical staple cartridge; in Example (c), an lower rib 55 of the left closure plate 50 of the surgical instrument is incapable of being received in a slot of an incompatible surgical staple cartridge, and an upper rib 64 of the right closure plate 60 is incapable of being received in a slot of the incompatible surgical staple cartridge; in Example (d), neither the upper rib 54 nor the lower rib 55 of the left closure plate 60 of the surgical instrument is capable of being received in a slot of the incompatible surgical staple cartridge, and the lower rib 65 of the right closure plate 60 is incapable of being received in the slot of an incompatible surgical staple cartridge. Due to the above-mentioned interference, the surgical instrument compatible with the surgical staple cartridge of the present disclosure will not be able to be installed with other existing surgical staple cartridges.

[0037] Fig. 16 and Fig. 17 exemplarily show a surgical staple cartridge according to another preferred embodiment of the present disclosure. Similar to the surgical staple cartridge shown in Figs. 7 to 9, the surgical staple cartridge shown in Fig. 16 also comprises: a protrusion 41 provided on at least one side wall for cooperating with a notch at a top end of a closure plate of a surgical instrument to guide the surgical staple cartridge to be correctly installed while preventing an incorrect model of surgical staple cartridge from being installed in the surgical instrument; a recess area 22 for indicating an installation direction of the surgical staple cartridge; and slots 43a, 43b positioned on outer surfaces of at least one side wall of the staple cartridge, the slots 43a, 43b being configured to cooperate with ribs on inner sides of the closure plates of the surgical instrument, which on one hand may be used to prevent the staple cartridge from being installed in an incompatible model of surgical instrument, and on the other hand, may be used to assist the closure plates to push the staple cartridge. As compared to the surgical staple cartridge shown in Figs. 7 to 9, the difference is that the width of the slots 43a, 43b is constant along their length, except for flared sections at tip ends of the slots 43a, 43b. The slot 43a or the slot 43b is used to receive only one rib or one row of ribs on the inner side the closure plate of the surgical instrument, rather than receive multiple ribs or multiple rows of ribs arranged in a staggered manner. Fig. 17 shows the slots 43a, 43b being symmetrically arranged on both sides of the surgical staple cartridge. Of course, as mentioned above, the slots 43a, 43b may also be asymmetrically arranged on the lateral sides of the surgical staple cartridge.

[0038] Fig. 18 exemplarily shows an enlarged view of an end effector portion of a surgical instrument which is compatible with the surgical staple cartridge shown in Fig. 16, wherein the surgical instrument is installed with the surgical staple cartridge of Fig. 16. As shown in the figure, the protrusion 41 of the surgical staple cartridge is accommodated in a notch 81 at a top end of a closure plate 80 of the surgical instrument, and the slot 43a slidably receives a row of ribs 84. Those skilled in the art will understand that although three ribs 84 are shown in the figure, one, two or more than three ribs 84 may also be possible.

[0039] References in this specification to "various embodiments", "some embodiments", "one embodiment" or "an embodiment" mean that specific features, structures or characteristics described in conjunction with the embodiments are included in at least one embodiment. Therefore, the phrases "in various embodiments", "in some embodiments", "in one embodiment" or "in an embodiment" and the like in the present specification are not necessarily all referring to the same embodiment. Furthermore, in one or more embodiments, the specific features, structures or characteristics may be combined in any suitable way.

Claims

1. A surgical staple cartridge (10) being configured to be removably installed between a pair of closure plates (50, 60) of a surgical instrument (100), the closure plates (50, 60) being configured to push the surgical staple cartridge (10) in a driving direction towards a staple anvil portion (70) of the surgical instrument (100) to clamp tissue between the surgical staple cartridge (10) and the staple anvil portion (70), the surgical staple cartridge (10) comprising: a first side wall (20) extending along a longitudinal direction parallel to an installation direction of the surgical staple cartridge (10), with a first protrusion (21) provided on an outer surface of the first side wall (20) at a position adjacent to a top end of the first side wall (20), and a first slot (23) extending in the longitudinal direction provided on the outer surface of the first side wall (20); and a second side wall (30) arranged in parallel and opposite to the first side wall (20); wherein the first protrusion (21) is configured to match with a first notch (51) at a top end of the first closure plate (50) to guide the surgical staple cartridge (10) to be correctly installed; wherein the first slot (23) includes a first partial slot (24) adjacent to the top end of the first side wall (20) and a second partial slot (25) adjacent to a bottom end of the first side wall (20), the second partial slot (25) being wider than the first partial slot (24) wherein a side of the second partial slot (25) is aligned with a same side of the first partial slot (24), characterised in that when the surgical staple cartridge (10) is installed between the first closure plate (50) and the second closure plate (60) along the installation direction, the first partial slot (24) is configured to receive one or more first ribs (54) provided on an inner surface of the first closure plate (50), and the second partial slot (25) is configured to receive one or more second ribs (55) provided on the inner surface of the first closure plate (50), the one or more second ribs (55) being staggered from the one or more first ribs (54) in a lateral direction parallel to the driving direction.

2. The surgical staple cartridge according to claim 1, wherein a second protrusion (31) is provided on an outer surface of the second side wall (30) at a position adjacent to a top end of the second side wall (30), and wherein the second protrusion (31) is configured to match with a second notch (61) at a top end of a second closure plate (60) of the surgical instrument to guide the surgical staple cartridge (10) to be correctly installed.

3. The surgical staple cartridge according to claim 1 or 2, wherein the or each protrusion (21, 31) has a substantially triangular profile, and wherein a vertex of the triangular profile faces towards the installation direction of the surgical staple cartridge (10).

4. The surgical staple cartridge according to claim 1 or 2, wherein the or each protrusion (21, 31) has a substantially arc profile or trapezoidal profile, and wherein a tapered end of the arc profile or the trapezoidal profile faces towards the installation direction of the surgical staple cartridge (10).

5. The surgical staple cartridge according to any preceding claim, wherein a recess area (22) is provided in the or each protrusion (21, 31), and wherein a profile of the recess area (22) is designed to indicate the installation direction of the surgical staple cartridge (10).

6. The surgical staple cartridge according to claim 5, wherein the profile of the recess area (22) is substantially the same as that of the protrusion (21, 31) in which the recess area (22) is provided.

7. The surgical staple cartridge according to claim 2 or any preceding claim dependent on claim 2, wherein the first protrusion (21) and the second protrusion (31) have the same or different profiles.

8. The surgical staple cartridge according to any preceding claim, wherein the first slot (23) further comprises a flared section (26) located at a bottom end of the second partial slot (25).

9. The surgical staple cartridge according to any preceding claim, wherein a second slot (33) extending in the longitudinal direction is further provided on the outer surface of the second side wall (30), and wherein the second slot (33) includes a third partial slot (34) adjacent to the top end of the second side wall (30) and a fourth partial slot (35) adjacent to a bottom end of the second side wall (30), the fourth partial slot (35) being wider than the third partial slot (34).

10. The surgical staple cartridge according to claim 9, wherein a side of the fourth partial slot (35) is aligned with a same side of the third partial slot (34), and when the surgical staple cartridge (10) is installed between the first closure plate (50) and the second closure plate (60) along the installation direction, the third partial slot (34) is configured to receive one or more third ribs (64) provided on an inner surface of the second closure plate (60), and the fourth partial slot (35) is configured to receive one or more fourth ribs (65) provided on the inner surface of the second closure plate (60), the one or more fourth ribs (65) being staggered from the one or more third ribs (64) in the lateral direction.

11. The surgical staple cartridge according to claim 9 or claim 10, wherein the second slot (33) further comprises a flared section (36) located at a bottom end of the fourth partial slot (35).

12. A closure member for a surgical instrument, the closure member being configured to removably hold a surgical staple cartridge (10) and push the surgical staple cartridge (10) in a driving direction towards a staple anvil portion (70) of the surgical instrument (100) to clamp tissue between the surgical staple cartridge (10) and the staple anvil portion (70), the closure member comprising: a first closure plate (50), wherein an inner surface of the first closure plate (50) is provided with one or more first ribs (54) extending along an installation direction of the surgical staple cartridge (10), and one or more second ribs (55) extending along the installation direction of the surgical staple cartridge (10); and a second closure plate (60) arranged opposite to the first closure plate (50); wherein the surgical staple cartridge (10) is configured to be removably installed between the first closure plate (50) and the second closure plate (60), and wherein a top end of the first closure plate (50) is provided with a first notch (51) for receiving a first protrusion (21) on a first side wall of the surgical staple cartridge (10); characterized in that: the one or more second ribs (55) are staggered with the one or more first ribs (54) in a lateral direction that is parallel to the driving direction.

13. The closure member according to claims 12, wherein a top end of the second closure plate (60) is provided with a second notch (61) for receiving a second protrusion (31) on a second side wall (30) of the surgical staple cartridge (10) opposite to the first side wall (20).

14. The closure member according to claim 12 or 13, wherein the or each notch (51, 61) has a substantially triangular profile, and wherein a vertex of the triangular profile faces towards the installation direction of the surgical staple cartridge (10).

15. The closure member according to claim 12 or 13, wherein the or each notch (51, 61) has a substantially arc profile or trapezoidal profile, and wherein a tapered end of the arc profile or the trapezoidal profile faces towards the installation direction of the surgical staple cartridge (10).

16. The closure member according to any one of claim 13 or any preceding claim dependent on claim 13, wherein the first notch (51) and the second notch (61) have the same or different profiles.

17. The closure member according to any one of claims 12 16, wherein an inner surface of the second closure plate (60) is provided with one or more third ribs (64) extending along the installation direction of the surgical staple cartridge (10).

18. The closure member according to claim 17, wherein the inner surface of the second closure plate (60) is further provided with one or more fourth ribs (65) extending along the installation direction of the surgical staple cartridge (10), the one or more fourth ribs (65) being staggered with the one or more third ribs (64) in the lateral direction.

19. A surgical instrument (100), comprising: the surgical staple cartridge (10) according to any one of claims 1 - 11; and the closure member according to any one of claims 12 - 18.