Nail bin assembly and surgical anastomat

Abstract

The utility model provides a nail bin assembly and a surgical anastomat, the nail bin assembly comprises a first sleeve and a second sleeve, the far end of the first sleeve is connected with the near end of the second sleeve, the near end of the first sleeve is used for being connected with an instrument platform of the surgical anastomat, and a pipe cavity of the first sleeve and a pipe cavity of the second sleeve communicate with each other and define a sliding space; the connecting piece is used for axially moving in the sliding space when receiving the driving force from the instrument platform; the guide piece extends in the sliding space, the far end of the guide piece is located in the second sleeve, the near end of the guide piece extends out of the near end of the second sleeve and is located in the first sleeve, the connecting piece is driven, the connecting piece receives the guide piece, and the guide piece guides the connecting piece to move into the second sleeve from the first sleeve in the axial direction. By arranging the guide piece extending in the axial direction, axial movement of the connecting piece is guided, and possible rotating movement of the connecting piece is prevented.

Description

Technical Field

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

[0002] A surgical stapler generally consists of an instrument platform, an actuator, and a slender rod with the actuator mounted at the distal end of the instrument platform. A power element is located within the instrument platform, and a firing element is located within the slender rod. A connecting element is provided between the power element and the firing element to transmit power. The connecting element is movable along the axial direction of the stapler within the slender rod. When the stapler is fired, the power element drives the firing element toward the distal end via the connecting element, which in turn drives the actuator to perform the suturing action.

[0003] Smaller incisions and more minimally invasive procedures are the future of surgical procedures. For example, in laparoscopic cutting staplers currently on the market, the diameter of the slender shaft of the disposable, reloadable stapler assembly is mostly 12 mm, and the instrument platform interface to which it is assembled is also 12 mm. As the diameter of the slender shaft of the stapler assembly is further reduced, a 12 mm section is often added to the assembly for compatibility with existing platforms. Therefore, the slender shaft of the stapler assembly has two cannulae: the cannula closer to the instrument platform has a larger outer diameter, while the cannula closer to the distal actuator has a smaller outer diameter. The guide structure of the connector in the existing technology only provides guidance within the larger diameter cannula and cannot meet the guidance requirements when the connector moves between two different cannulae. When the connector is driven from the larger outer diameter cannula to the smaller outer diameter cannula, it may rotate unnecessarily, affecting the power transmission from the power element to the firing element, and thus affecting the surgical effect of the actuator. Utility Model Content

[0004] In response to the problems in the prior art, the purpose of this application is to provide a staple magazine assembly and a surgical stapler, which, by providing a guide member, guides and constrains the axial movement of the connecting member between the two sleeves to prevent possible rotational movement of the connecting member.

[0005] An embodiment of the present application provides a staple cartridge assembly for a surgical stapler, the staple cartridge assembly comprising:

[0006] A first sleeve and a second sleeve, wherein the distal end of the first sleeve is connected to the proximal end of the second sleeve, the proximal end of the first sleeve is used to connect to the instrument platform of the surgical stapler, and the lumens of the first sleeve and the second sleeve are connected to each other and define a sliding space;

[0007] The connecting member is used to move axially within the sliding space when receiving a driving force from the instrument platform;

[0008] The guide member extends in the sliding space, the distal end of the guide member is located in the second sleeve, and the proximal end of the guide member extends from the proximal end of the second sleeve and is located in the first sleeve, wherein the connecting member is driven, the connecting member engages the guide member, and the guide member guides the connecting member to move axially from the first sleeve to the second sleeve.

[0009] In some embodiments, a first groove is provided on a side of the connecting member facing the guiding member, and the guiding member is at least partially embedded in the first groove.

[0010] In some embodiments, the device further comprises a firing member movably disposed within the second sleeve, wherein the connecting member is configured to drive the firing member to move axially upon receiving a driving force from the instrument platform. In some embodiments, a first main body housing is disposed within the lumen of the first sleeve, the first main body housing being provided with a first fixing portion, the first fixing portion being connected to the proximal end of the guide member.

[0011] In some embodiments, the first fixing portion includes a protrusion, and the proximal end of the guide member is provided with a hole that is sleeved on the protrusion.

[0012] In some embodiments, a second main body shell is provided in the lumen of the second sleeve, and the second main body shell is provided with a second fixing portion, and the second fixing portion is connected to the distal end of the guide member.

[0013] In some embodiments, the second fixing portion includes a groove, and the distal end of the guide member is embedded in the groove.

[0014] In some embodiments, the outer diameter of the first cannula is greater than the outer diameter of the second cannula.

[0015] In some embodiments, the outer diameter of the second cannula is less than or equal to 8 mm.

[0016] An embodiment of the present application also provides a surgical stapler, comprising an instrument platform and the above-mentioned staple magazine assembly, wherein the proximal end of the first sleeve of the staple magazine assembly comprises a first connecting portion, and the distal end of the instrument platform comprises a second connecting portion, and the first connecting portion and the second connecting portion are detachably connected.

[0017] The staple cartridge assembly and surgical stapler provided by this application have the following advantages:

[0018] By adopting the present application, a guide member is provided in the sliding space defined by the first sleeve and the second sleeve to guide the axial movement of the connecting member from the first sleeve into the second sleeve, so that the connecting member will not rotate when moving in the sliding space, ensuring that the connecting member can still be guided and constrained by the guide member during the process of entering the second sleeve from the first sleeve and after entering the second sleeve to maintain stable movement, thereby ensuring that the power from the instrument platform can be better transmitted to the firing member, thereby improving the surgical effect of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0020] Figure 1 1 is a schematic structural diagram of a surgical stapler according to an embodiment of the present application;

[0021] Figure 2 This is a structural diagram of a staple cartridge assembly according to an embodiment of the present application;

[0022] Figure 3 This is a schematic structural diagram of a connector according to an embodiment of the present application;

[0023] Figure 4 Schematic diagram of the cooperation between the drive assembly and the guide member according to one embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the cooperation between the drive assembly, the guide member, and the end swing drive member according to an embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of the cooperation between the drive assembly, the guide member, and the end swing drive member in the initial state of one embodiment of the present application;

[0026] Figure 7 It is a schematic diagram of the cooperation between the drive assembly, the guide member and the end swing drive member during the firing process of one embodiment of the present application. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the 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 this application will be comprehensive and complete and will 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 their repeated descriptions will be omitted. "Or" and "or" in the specification may both mean "and" or "or". Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although "first" or "second" is used in this specification to represent certain features, it is only to indicate the function and not to limit the number and importance of specific features. In this application, "distal" and "proximal" are relative to the operator, the end closer to the operator is the proximal end, and the end farther from the operator, that is, the end closer to the surgical site is the distal end. The direction along the axis of the stapler is the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or from the proximal side to the distal side of the stapler. For example, in Figure 1From a perspective of , for the first sleeve 4, its distal end is the left end, and its proximal end is the right end. For a component, "inside" and "outside" are relative to the axis of the component, with the side closer to the axis being the inside and the side farther from the axis being the outside. For a component, "circumferential" refers to the circumferential direction surrounding the axis of the component.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a stapler assembly and a surgical stapler including the same. The surgical stapler includes an instrument platform (not shown in the figure) and an actuator 1, and the actuator 1 includes a stapler assembly 11 and a staple anvil 12 that are relatively arranged. The stapler assembly includes a slender rod and an actuator, and the actuator is mounted on the instrument platform of the surgical stapler through the slender rod. The slender rod includes a slender sleeve, a firing member 9 and a connecting member 6 arranged inside the sleeve. The sleeve includes a first sleeve 4 and a second sleeve 2, the distal end of the first sleeve 4 is connected to the proximal end of the second sleeve 2, the proximal end of the first sleeve 4 includes a first connecting portion, and the distal end of the instrument platform includes a second connecting portion, the first connecting portion and the second connecting portion are detachably connected, so that the stapler assembly can be detachably mounted on the instrument platform. The tubular cavities of the first sleeve 4 and the second sleeve 2 are interconnected and define a sliding space extending axially. The connecting member 6 is connected to the proximal end of the firing member 9 and is used to receive the driving force from the instrument platform to drive the firing member 9 to move axially. The firing member is movably disposed in the second sleeve 2. In this embodiment, a power member (not shown) is provided in the instrument platform. The proximal end of the connecting member 6 is connected to the power member. Figure 2 Figure 2 shows the position of the connector 6 when the stapler is in its initial state (unfired state). When the stapler is fired, the power member is driven to move distally, driving the connector 6 to move axially from the first sleeve 4 to the second sleeve 2 within the sliding space. The connector 6 then drives the firing member 9 to move distally, and the distal end of the firing member 9 drives the actuator 1 to perform the suturing action.

[0029] The first cannula 4 and the second cannula 2 are coaxially arranged. The first cannula 4 and the second cannula 2 have different outer diameters, with the outer diameter of the first cannula 4 being larger than that of the second cannula 2. Specifically, the axial length of the first cannula 4 is shorter than that of the second cannula 2. It is understood that during surgery, the first cannula 4 is blocked from the outside by the pneumoperitoneum assembly and does not enter the human abdominal cavity. Therefore, reducing the axial length of the first cannula 4 while extending the axial length of the second cannula 2 can enhance the maneuverability of the stapler within the pneumoperitoneum. Furthermore, the reduced axial length of the first cannula 4 facilitates the transmission of the driving force generated by the instrument platform of the stapler, increasing the efficiency of the driving force transmission.

[0030] The proximal end of the second sleeve 2 can be optionally arranged inside the distal end of the first sleeve 4. The first sleeve 4 and the second sleeve 2 are used to connect the large-diameter instrument platform interface and the small-diameter actuator 1. For example, the diameter of the instrument platform interface is 12 mm, and the diameter of the actuator 1 is less than or equal to 8 mm. The outer diameter of the first sleeve 4 is 12 mm, and the outer diameter of the second sleeve 2 is less than or equal to 8 mm. Therefore, the instrument platform with a larger interface can be connected to the actuator 1 with a smaller diameter, which is more suitable for the development goal of more minimally invasive surgical operations. In addition, the actuator 1 with a smaller diameter can be directly connected to the existing instrument platform, which reduces the cost of updating the instrument.

[0031] Combine Figure 1 、 Figure 2 and Figure 6 When the anastomosis device is in the initial state, the connector 6 is arranged in the lumen of the first sleeve 4. The first sleeve 4 serves as a transition section for connecting the large-diameter instrument platform interface and the small-diameter second sleeve 2. The length of the first sleeve 4 should not be set too long, and it is difficult to set a guide structure on the shorter first sleeve 4. Moreover, even if a guide structure is set on the first sleeve 4 to constrain the rotational movement of the connector 6, during the process of the connector 6 moving from the first sleeve 4 to the second sleeve 2 and after the connector 6 moves into the lumen of the second sleeve 2, the connector 6 is still not constrained by the guide structure on the first sleeve 4, and it is also difficult to ensure that the connector 6 does not rotate circumferentially during axial movement. Based on this, this embodiment proposes a separate guide member 7, which is set independently of the first sleeve 4 and the second sleeve 2, and is fixedly connected to the interior of the first sleeve 4 and the second sleeve 2 respectively, so that the guide member 7 and the first sleeve 4 and the second sleeve 2 do not move relative to each other.

[0032] like Figure 2 As shown, the guide member 7 extends in the sliding space, the distal end of the guide member 7 is located in the second sleeve 2, and the proximal end of the guide member 7 extends from the proximal end of the second sleeve 2 and is located in the first sleeve 4. Figure 5 and Figure 6 As shown in FIG, when the stapler is in the initial state, the connecting member 6 is located on the proximal side of the guide member 7 and does not contact the guide member 7. Figure 7As shown, when the stapler is fired, the connecting member 6 is driven to move axially toward the distal end, the connecting member 6 receives the guide member 7 and engages with the guide member 7, the guide member 7 guides the connecting member 6 to move from the first sleeve 4 to the second sleeve 2, and the connecting member 6 continues to move toward the distal end under the guidance of the guide member 7. Therefore, the present application provides a guide member 7 in the sliding space defined by the first sleeve 4 and the second sleeve 2 to guide the axial movement of the connecting member 6, so that the connecting member 6 does not rotate circumferentially when moving in the sliding space, ensuring that the connecting member 6 can still be guided and constrained by the guide member 7 during the process of entering the second sleeve 2 from the first sleeve 4 and after entering the second sleeve 2, and maintain stable movement, thereby ensuring that the power of the power member can be better transmitted to the firing member 9, thereby improving the surgical effect of the actuator 1. In another alternative embodiment, the proximal end 71 of the guide member 7 may also be further extended in the proximal direction, so that when the anastomosis device is in the initial state, the connecting member 6 is already engaged with the guide member 7, which also falls within the scope of protection of the present application.

[0033] like Figure 1 and Figure 2 As shown, a first main body shell 5 is provided in the lumen of the first sleeve 4, and the first main body shell 5 is provided with a first fixing portion 51, and the first fixing portion 51 is fixed to the proximal end 71 of the guide member 7. For example, the first fixing portion 51 is a protrusion, and the proximal end 71 of the guide member 7 is provided with a hole that is sleeved on the protrusion. Figure 1 and Figure 4 As shown, a second main body shell 3 is provided in the tubular cavity of the second sleeve 2, and the second main body shell 3 is provided with a second fixing portion 31, and the second fixing portion 31 is fixed to the distal end 72 of the guide member 7. For example, the second fixing portion 31 is a groove, and the distal end 72 of the guide member 7 is embedded in the groove. The proximal end 71 and distal end fixing methods of the guide member 7 here are only examples. Other fixing structures that can fix the guide member 7 in the tubular cavities of the first sleeve 4 and the second sleeve 2 can also be adopted, all of which fall within the scope of protection of this application. For example, in another embodiment of the present application, the guide member 7 includes an outer side away from the central axis, and a groove is provided on the inner wall of the sliding space formed by the first sleeve 4 and the second sleeve 2. After the connecting member 6 moves axially and combines with the guide member 7, the connecting member 6 slides in the sliding space to generate a thrust, and this thrust causes the outer side of the guide member 7 to be embedded in the above-mentioned groove so that the guide member 7 and the groove are fixedly connected.

[0034] like Figure 3 and Figure 5 As shown, in this embodiment, the connecting member 6 is provided with a first groove 61 on one side facing the guide member 7. The guide member 7 may be a thin-sheet rod-shaped structure. Figure 7When the connecting member 6 and the guide member 7 are engaged with each other, the guide member 7 is at least partially embedded in the first groove 61, and when the connecting member 6 moves axially relative to the guide member 7, the first groove 61 moves axially relative to the guide member 7 and is engaged with different positions of the guide member 7 respectively.

[0035] In this embodiment, to accommodate a wider range of surgical scenarios, the actuator 1 needs to be able to adjust to a wider range of angles relative to the instrument platform. Therefore, the cartridge assembly also includes an end swing drive 8, which is used to drive the actuator 1 to swing laterally relative to the instrument platform. Specifically, when the end swing drive 8 moves axially, it can drive the actuator 1 to swing left or right relative to the axis of the instrument platform, thereby adjusting the angle of the actuator 1 relative to the instrument platform.

[0036] like Figure 3 and Figure 5 As shown, the connecting member 6 is provided with a second groove 62 on the side facing the end swing driving member 8, and the end swing driving member 8 is at least partially embedded in the second groove 62, so that the end swing driving member 8 and the connecting member 6 are embedded with each other. Therefore, through the embedding and cooperation between the end swing driving member 8 and the connecting member 6, the circumferential rotation movement of the connecting member 6 is further constrained, and the stability of the axial movement of the connecting member 6 is maintained. Figure 5 As shown, the guide member 7 and the end swing drive member 8 are respectively arranged on both sides of the axis of the stapler, so that the guide member 7 and the end swing drive member 8 provide symmetrical and balanced guiding functions for the connecting member 6 on both sides. However, the present application is not limited to adopting this structure. In other alternative embodiments, the guide member 7 can also be arranged in other positions according to the actual layout arrangement and actual use needs. For example, the guide member 7 can be arranged above, below, or at other positions with axial clearance of the firing member 9, which falls within the scope of protection of the present application.

[0037] The above content is a further detailed description of the present application in conjunction with specific preferred embodiments, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered to fall within the scope of protection of the present application.

Claims

1. A staple cartridge assembly for a surgical stapler, characterized in that: The staple cartridge assembly comprises: a first cannula and a second cannula, wherein the distal end of the first cannula is connected to the proximal end of the second cannula, the proximal end of the first cannula being used to connect to the instrument platform of the surgical stapler, and the lumens of the first cannula and the second cannula are interconnected and define a sliding space; a connecting member, configured to move axially within the sliding space upon receiving a driving force from the instrument platform; A guide member extends in the sliding space, the distal end of the guide member is located in the second sleeve, and the proximal end of the guide member extends from the proximal end of the second sleeve and is located in the first sleeve, wherein the connecting member is driven and the connecting member engages the guide member, and the guide member guides the connecting member to move axially from the first sleeve to the second sleeve.

2. The staple cartridge assembly according to claim 1, wherein: A first groove is provided on a side of the connecting member facing the guiding member, and the guiding member is at least partially embedded in the first groove.

3. The staple cartridge assembly according to claim 1, wherein: It also includes a firing piece, which is movably disposed in the second sleeve. The connecting piece is configured to drive the firing piece to move along the axial direction when receiving a driving force from the instrument platform.

4. The staple cartridge assembly according to claim 1, wherein: A first main body shell is provided in the lumen of the first sleeve. The first main body shell is provided with a first fixing portion. The first fixing portion is connected to the proximal end of the guide member.

5. The staple cartridge assembly according to claim 4, wherein: The first fixing portion includes a protrusion, and the proximal end of the guide member is provided with a hole sleeved on the protrusion.

6. The staple cartridge assembly according to claim 1, wherein: A second main body shell is provided in the lumen of the second sleeve. The second main body shell is provided with a second fixing portion. The second fixing portion is connected to the distal end of the guide member.

7. The staple cartridge assembly according to claim 6, wherein: The second fixing portion includes a groove, and the distal end of the guide member is embedded in the groove.

8. The staple cartridge assembly according to claim 1, wherein: The outer diameter of the first sleeve is greater than the outer diameter of the second sleeve.

9. The staple cartridge assembly according to claim 8, wherein: The outer diameter of the second sleeve is less than or equal to 8 mm.

10. A surgical stapler, comprising an instrument platform, characterized in that: It also includes the nail magazine assembly according to any one of claims 1 to 9, wherein the proximal end of the first sleeve of the nail magazine assembly includes a first connecting portion, the distal end of the instrument platform includes a second connecting portion, and the first connecting portion and the second connecting portion are detachably connected.

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