Stitching instrument and outer tube assembly

Abstract

The utility model relates to a stitching instrument and an outer tube assembly. The outer tube assembly comprises an outer tube and a puncture part. The far end of the outer tube is a closed end, the outer wall of the closed end is in an arc shape, and a negative pressure window used for sucking target tissue into the outer tube is formed in the side wall of the outer tube. In the operation process, the outer tube drives the puncture part to enter the operation channel, the far end of the outer tube is the closed end, and the outer wall of the closed end is arc-shaped, so that the outer wall of the closed end causes less damage to target tissues when being in contact with the target tissues, and the postoperative rehabilitation effect is facilitated; besides, under the action of the suction force of the suction mechanism of the stitching instrument, the target tissue enters the outer tube through the negative pressure window, meanwhile, the closed end plays a blocking role and can prevent tissue fluid from entering the outer tube, and the adsorption effect of the negative pressure window on the target tissue can be improved. Therefore, damage to the tissue in the operation process can be reduced, safety is improved, and the operation success rate can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a stapler and an outer tube assembly. Background Art

[0002] Suturing is to align or reconstruct the channels of tissues and organs that have been incised or traumatized and fractured, restore their functions, which is a basic condition for ensuring good healing and also one of the important basic surgical operation techniques. Tissues and organs in different parts need to be sutured in different ways.

[0003] The stapler in the related art includes a delivery tube and a puncture member movably disposed in the delivery tube. During use, the delivery tube drives the puncture member into the surgical channel to perform a suturing operation on the tissues in the surgical channel. The distal end of the delivery tube is usually set as an open end, and the open end will cause tissue damage due to friction with the tissues during the movement into the surgical channel, reducing the safety. In addition, the tissue fluid during the suturing process is likely to enter the delivery tube under the action of the negative pressure suction force inside the delivery tube, thus interfering with the suturing operation and greatly reducing the surgical success rate. Summary of the Invention

[0004] Based on this, it is necessary to overcome the defects of the prior art and provide a stapler and an outer tube assembly, which can reduce the damage to tissues during the operation, improve the safety, and improve the surgical success rate.

[0005] An outer tube assembly, the outer tube assembly comprising:

[0006] An outer tube, the distal end of the outer tube is set as a closed end, and the outer wall of the closed end is formed in an arc shape. A negative pressure window communicating with the inner cavity of the outer tube is formed on the side wall of the outer tube, and the negative pressure window is used for allowing the target tissue to enter the inside of the outer tube; and

[0007] A puncture member, the puncture member is movably disposed inside the outer tube along the axial direction Z of the outer tube, and the puncture member can drive the suture to pass through the target tissue that enters the inside of the outer tube through the negative pressure window.

[0008] In one embodiment, the outer tube includes a main body tube and a plugging member; the distal end of the main body tube is set as an open end, and the plugging member is installed at the open end to seal the open end.

[0009] In one embodiment, the plugging member includes a plugging head and a plugging portion connected to the plugging head; the plugging head protrudes to the outside of the main body tube, and the plugging portion is in plugging fit with the open end of the main body tube.

[0010] In one embodiment, the insertion part is in interference fit, snap fit, adhesive fixation or welding fixation with the open end of the main body tube.

[0011] In one embodiment, the insertion part is provided as an insertion tube, and the insertion tube is inserted and fixed inside the open end of the main body tube.

[0012] In one embodiment, at the part where the plugging head is connected to the insertion tube, a positioning step is formed protruding from the tube wall of the insertion tube, and the positioning step abuts against the distal end face of the main body tube.

[0013] In one embodiment, the outer wall of the plugging head near the open end is on the same plane as the outer wall of the main body tube.

[0014] In one embodiment, the outer wall of the plugging head is provided as a hemispherical shape or a semi-ellipsoidal shape.

[0015] In one embodiment, the outer tube assembly further includes a wire hook, the wire hook is rotatably arranged inside the distal end of the outer tube, and the moving positions of the wire hook include a wire-hooking position for hooking the suture and a wire-releasing position for releasing the suture.

[0016] A stapler, the stapler includes the above-mentioned outer tube assembly.

[0017] In the above-mentioned stapler and outer tube assembly, during the surgical process, the outer tube is made to enter the surgical channel with the puncture member. Since the distal end of the outer tube is provided as a closed end and the outer wall of the closed end is provided in an arc shape, the outer wall of the closed end causes less damage to the target tissue when contacting the target tissue, which is beneficial to the postoperative rehabilitation effect. In addition, under the suction force of the suction mechanism of the stapler, the target tissue enters the inside of the outer tube through the negative pressure window. At the same time, the closed end plays a plugging role to prevent tissue fluid from entering the inside of the outer tube and can improve the adsorption effect on the target tissue at the negative pressure window. The puncture member reciprocates axially along the outer tube towards the distal end of the outer tube, and then the puncture and suturing work on the target tissue can be carried out. Thus, it can be seen that the damage to the tissue during the surgical process can be reduced, the safety is improved, and the surgical success rate can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a stapler according to an embodiment of the present application.

[0019] Figure 2 It is Figure 1 The exploded structural diagram of the shown structure at A.

[0020] Figure 3 It is Figure 2 The structural diagram of the plugging member in the shown structure.

[0021] Figure 4 The Figure 1 cross-sectional view of the structure shown at location A.

[0022] 10. Outer tube assembly; 11. Outer tube; 1101. Closed end; 1102. Negative pressure window; 1103. Second shaft hole; 111. Main body tube; 1111. Open end; 112. Sealing member; 1121. Sealing head; 1122. Insertion part; 1123. Positioning step; 1124. Third shaft hole; 1125. First notch; 1126. Second notch; 12. Piercing member; 121. Threading hole; 13. Thread hook; 131. Mounting seat; 1311. First shaft hole; 1312. Mounting hole; 132. Thread hooking claw; 133. Pin shaft; 14. Push rod; 20. Pushing and pulling mechanism; 21. Push-pull rod; 22. Moving block; 221. Moving hole. Detailed implementation manners

[0023] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0024] In the description of the present application, it still needs to be noted that the proximal end refers to the end of the instrument or component close to the operator, and the distal end refers to the end of the instrument or component away from the operator; the axial direction refers to the direction parallel to the center line connecting the distal end and the proximal end of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction.

[0025] Refer to Figures 1 to 4 , Figure 1 which shows the structure diagram of a stapler according to an embodiment of the present application. Figure 2 shows Figure 1 the exploded view of the structure shown at location A. Figure 3 shows Figure 2 the structure diagram of the sealing member 112 in the structure shown. Figure 4 shows Figure 1Cross-sectional structure diagram of the shown structure at A. An outer tube assembly 10 provided by an embodiment of the present application, the outer tube assembly 10 includes an outer tube 11 and a puncture member 12. The distal end of the outer tube 11 is set as a closed end 1101, and the outer wall of the closed end 1101 is arranged in an arc shape. A negative pressure window 1102 communicating with the inner cavity of the outer tube 11 is formed on the side wall of the outer tube 11, and the negative pressure window 1102 is used for sucking the target tissue into the inner part of the outer tube 11. The puncture member 12 is movably arranged inside the outer tube 11 along the axial direction Z of the outer tube 11, and the puncture member 12 can drive the suture to pass through the target tissue entering the inner part of the outer tube 11 through the negative pressure window 1102. Optionally, the puncture member 12 includes but is not limited to a puncture needle. Among them, a thread passing hole 121 is provided on the puncture needle, and the suture is threaded through the thread passing hole 121 and penetrates into the target tissue along with the puncture needle to realize the suture work on the target tissue.

[0026] It should be noted that the outer wall of the closed end 1101 refers to the side wall of the part of the closed end 1101 exposed outside the outer tube 11.

[0027] For the above-mentioned outer tube assembly 10, during the surgical process, the outer tube 11 is made to enter the surgical channel with the puncture member 12. Since the distal end of the outer tube 11 is set as the closed end 1101 and the outer wall of the closed end 1101 is arranged in an arc shape, the outer wall of the closed end 1101 causes less damage to the target tissue when contacting the target tissue, which is beneficial to the postoperative rehabilitation effect; in addition, under the suction force of the suction mechanism of the stapler, the target tissue enters the inner part of the outer tube 11 through the negative pressure window 1102; at the same time, the closed end 1101 plays a blocking role to prevent tissue fluid from entering the inner part of the outer tube 11 and can improve the adsorption effect of the negative pressure window 1102 on the target tissue. In this way, when the puncture member 12 reciprocates along the axial direction of the outer tube 11 towards the distal end of the outer tube 11, the puncture and suture work on the target tissue can be carried out. Thus, it can be seen that the damage to the tissue during the surgical process can be reduced, the safety is improved, and the surgical success rate can be increased.

[0028] In one embodiment, the outer tube 11 includes a main body tube 111 and a plugging member 112. The distal end of the main body tube 111 is set as an open end 1111, and the plugging member 112 is installed at the open end 1111 to seal the open end 1111. In this way, the main body tube 111 and the plugging member 112 can be processed independently, and then the main body tube 111 and the plugging member 112 are connected to each other to obtain the outer tube 11, which can reduce the processing difficulty of the outer tube 11 and improve the production efficiency. In this way, during the processing of the outer tube 11, there is no need to perform further processing at the distal end of the tube opening for plugging, but only the plugging member 112 is used for plugging. The plugging member 112 can be processed independently, so as to reduce the processing difficulty and reduce the mold cost.

[0029] In some embodiments, instead of manufacturing and assembling the outer tube 11 by dividing it into two parts, namely the main body tube 111 and the plugging member 112, the outer tube 11 can also be integrally processed by a mold. In other words, the plugging member 112 and the main body tube 111 are integrally formed, for example, integrally molded with the main body tube 111.

[0030] Please refer to Figures 1 to 4 , in one embodiment, the plugging member 112 includes a plugging head 1121 and an insertion portion 1122 connected to the plugging head 1121. The plugging head 1121 protrudes to the outside of the main body tube 111, and the insertion portion 1122 is inserted and fitted with the open end 1111 of the main body tube 111. Specifically, the insertion portion 1122 can be either inserted and fixed inside the open end 1111 of the main body tube 111 or sleeved and fixed outside the main body tube 111, both of which can facilitate the rapid assembly of the insertion portion 1122 and the main body tube 111 together. In addition, after the insertion portion 1122 is connected to the main body tube 111, the plugging function of the open end 1111 of the main body tube 111 is realized by the plugging head 1121, and the outer wall of the plugging head 1121 is arranged in an arc shape to reduce the damage to the tissue during the contact with the tissue.

[0031] It should be noted that the "insertion portion 1122" can be "a part of the plugging head 1121", that is, the "insertion portion 1122" and the "other part of the plugging head 1121" are integrally formed; or it can be an independent component separable from the "other part of the plugging head 1121", that is, the "insertion portion 1122" can be independently manufactured and then combined with the "other part of the plugging head 1121" to form a whole.

[0032] In one embodiment, the insertion portion 1122 is in interference fit, snap-fit, adhesive fixation or welding fixation with the open end 1111 of the main body tube 111. In this way, the plugging member 112 can be stably installed and fixed at the distal end of the main body tube 111, and the plugging member 112 is not easily detached from the main body tube 111.

[0033] In one embodiment, the insertion portion 1122 is provided as an insertion tube, and the insertion tube is inserted and fixed inside the open end 1111 of the main body tube 111.

[0034] In one embodiment, at the position where the plugging head 1121 is connected to the insertion tube, a positioning step 1123 protrudes from the tube wall of the insertion tube, and the positioning step 1123 abuts against the distal end face of the main body tube 111.

[0035] Please refer to Figure 4 , in some embodiments, the positioning step 1123 is in close contact with the distal end face of the main body tube 111, and the distance between the two in the axial direction of the outer tube 11 is specifically 0 or controlled within, for example, 1 mm.

[0036] Please refer to Figure 4 In one embodiment, the outer wall of the plugging head 1121 near the opening end 1111 is in the same plane as the outer wall of the main body tube 111. In this way, the outer walls at the docking part of the plugging head 1121 and the main body tube 111 are perfectly joined together, specifically in a plane, which can reduce the damage to the tissue when contacting the tissue.

[0037] In some embodiments, the outer wall of the plugging head 1121 is an arc surface or an ellipsoidal arc surface. In this way, during the process of entering the surgical channel, the damage to the tissue can be reduced. Specifically, the outer wall of the plugging head 1121 includes but is not limited to being set as a hemispherical shape or a semi-ellipsoidal shape.

[0038] In one embodiment, the outer tube assembly 10 further includes a wire hook 13. The wire hook 13 is rotatably arranged inside the distal end of the outer tube 11. The moving positions of the wire hook 13 include a wire-hooking position for hooking the suture and a wire-releasing position for releasing the suture. In this way, when the puncturing member 12 performs the suturing work, the wire hook 13 correspondingly performs the wire-hooking action and the wire-releasing action, which can enable the suturing work of the target tissue to be carried out smoothly. Specifically, the puncturing member 12 moves along the axial direction Z of the outer tube 11 towards the distal end of the outer tube 11 to puncture the target tissue sucked into the inside of the outer tube 11 by the negative pressure window 1102. After completing the puncturing action, when the puncturing member 12 moves in the reverse direction along the axial direction Z of the outer tube 11 to withdraw the needle, the wire hook 13 is rotated to the wire-hooking position, and the wire hook 13 can smoothly hook the suture passing through the target tissue; then, for example, the outer tube assembly 10 is rotated and / or axially moved to adjust to the target tissue at different positions, and the above steps are repeated, so that the suturing operation of the target tissue can be completed.

[0039] On the basis of the foregoing embodiment, the wire hook 13 includes a mounting seat 131 rotatably connected to the outer tube 11 and a wire-hooking claw 132 connected to the mounting seat 131. Optionally, the wire hook 13 further includes a pin shaft 133. The mounting seat 131 is provided with a first shaft hole 1311, for example, and the opposite two side parts of the outer tube 11 are provided with second shaft holes 1103 corresponding to the position of the first shaft hole 1311. The pin shaft 133 is respectively passed through the first shaft hole 1311 and the two second shaft holes 1103 so that the mounting seat 131 and the outer tube 11 are combined and connected. In this way, on the one hand, the mounting seat 131 can freely and flexibly rotate inside the outer tube 11; on the other hand, in the assembly process, by aligning the first shaft hole 1311 of the mounting seat 131 and the second shaft hole 1103 of the outer tube 11 and then inserting the pin shaft 133, the wire hook 13 can be rotatably installed inside the outer tube 11, and the assembly operation is relatively convenient. In addition, both ends of the pin shaft 133 can be fixed to the outer tube 11 by welding, or can be fixed to the outer tube 11 by riveting, or can be fixed to the outer tube 11 by plugging, etc., as long as the end of the pin shaft 133 is connected to the outer tube 11 to prevent it from disengaging from the outer tube 11.

[0040] On the basis of the foregoing embodiments, a third shaft hole 1124 corresponding to the position of the first shaft hole 1311 is formed on the tube wall of the cannula, and the pin shaft 133 also passes through the third shaft hole 1124, so as to avoid interference between the cannula and the pin shaft 133. Among them, the third shaft hole 1124 is specifically, for example, a hole that is not enclosed on all sides, so as to facilitate the installation of the plugging member 112 inside the distal end of the outer tube 11.

[0041] Please refer to Figures 1 to 4 , in one embodiment, a stapler includes the outer tube assembly 10 of any of the foregoing embodiments.

[0042] In the above stapler, during the surgical process, the outer tube 11 is made to enter the surgical passage with the puncturing member 12. Since the distal end of the outer tube 11 is set as a closed end 1101, and the outer wall of the closed end 1101 is set in an arc shape, the outer wall of the closed end 1101 causes less damage to the target tissue when contacting the target tissue, which is beneficial to the postoperative rehabilitation effect; in addition, under the suction force of the suction mechanism of the stapler, the target tissue enters the inside of the outer tube 11 through the negative pressure window 1102. At the same time, the closed end 1101 plays a plugging role to prevent tissue fluid from entering the inside of the outer tube 11 and can improve the adsorption effect of the target tissue at the negative pressure window 1102. The puncturing member 12 reciprocates axially along the outer tube 11 towards the distal end of the outer tube 11, and thus the target tissue can be punctured and sutured. It can be seen that the damage to the tissue during the surgical process can be reduced, the safety is improved, and the surgical success rate can be increased.

[0043] In some embodiments, the stapler further includes a push-pull mechanism 20. The push-pull mechanism 20 includes, but is not limited to, being movably inserted into the outer tube 11. The push-pull mechanism 20 includes a push rod 21 and a moving block 22 connected to the push rod 21. An activity hole 221 is formed on the moving block 22. The activity hole 221 includes, but is not limited to, an oval hole, a strip hole, and the like. The outer tube assembly 10 further includes a push rod 14 connected to the mounting seat 131. Specifically, the mounting seat 131 forms a mounting hole 1312. One end of the push rod 14 is inserted into the mounting hole 1312, and the other end of the push rod 14 extends to the outside of the mounting seat 131 and is inserted into the activity hole 221 and can move along the activity hole 221. Among them, the push rod 21 can move back and forth either under manual drive or under the drive of a power mechanism such as a lead screw motor or a cylinder, which is not limited herein and can be flexibly adjusted and set according to actual needs. When the push rod 21 drives the moving block 22 to reciprocate, the moving block 22 drives the push rod 14 to act, and the push rod 14 correspondingly moves along the activity hole 221 and drives the mounting seat 131 to rotate, so as to realize the switching of the wire-hooking claw 132 between the release position and the wire-hooking position.

[0044] In some embodiments, the target tissue can enter the interior of the outer tube 11 through the negative pressure window 1102 under the suction of negative pressure. During the suturing operation, the puncturing member 12 and the wire hook 13 cooperate with each other to perform the suturing operation on the target tissue.

[0045] It should be noted that the "mounting seat 131" can be "a part of the wire hook 13", that is, the "mounting seat 131" and the "other parts of the wire hook 13" are integrally formed; or it can be an independent component separable from the "other parts of the wire hook 13", that is, the "mounting seat 131" can be manufactured independently and then combined with the "other parts of the wire hook 1313" into a whole.

[0046] In some embodiments, a first notch 1125 for avoiding the wire hook 13 is formed on the proximal wall of the cannula. In this way, the wire hook 13 can rotate flexibly inside the outer tube 11 during operation without being interfered by the cannula. In addition, a second notch 1126 for avoiding the pushing and pulling mechanism 20 is also formed on the proximal wall of the cannula. In this way, when the pushing and pulling mechanism 20 moves and extends towards the distal end of the outer tube 11, the second notch 1126 enables the cannula to avoid the pushing and pulling mechanism 20, so that the movement of the pushing and pulling mechanism 20 will not be interfered by the cannula.

[0047] It should be noted that the outer tube assembly in this application is intended to cover the case where the parts in the outer tube assembly can be directly assembled, and also intends to cover the case where the parts of the outer tube assembly cannot be directly assembled, but need to be assembled with the help of medical device components such as the housing and the components inside the housing.

[0048] It should also be noted that the related technologies in the background art of this application are only for facilitating the description of the technical problems to be solved by this application, and these related technologies do not necessarily belong to the prior art.

[0049] In addition, if the terms "first" and "second" appear, these terms are only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or similar descriptions, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0052] The above-described embodiments merely represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.

Claims

1. An outer tube assembly, characterized in that: The outer tube assembly comprises: an outer tube, wherein the distal end of the outer tube is set as a closed end, and the outer wall of the closed end is set in an arc shape, and a negative pressure window connected to the inner cavity of the outer tube is formed on the side wall of the outer tube, and the negative pressure window is used to allow the target tissue to enter the inner part of the outer tube; and A puncture member is movably disposed inside the outer tube along the axial direction Z of the outer tube, and the puncture member can drive the suture thread to pass through the target tissue entering the outer tube.

2. The outer tube assembly according to claim 1, characterized in that: The outer tube comprises a main body tube and a plugging member; the distal end of the main body tube is set as an open end, and the plugging member is installed at the open end and seals the open end.

3. The outer tube assembly according to claim 2, characterized in that: The plugging piece includes a plugging head and an inserting portion connected to the plugging head; the plugging head protrudes to the outside of the main body tube, and the inserting portion is plugged and matched with the open end of the main body tube.

4. The outer tube assembly according to claim 3, characterized in that: The plug-in portion is fixed to the open end of the main body tube by interference fit, snap-fit, adhesive fixation or welding.

5. The outer tube assembly according to claim 3, characterized in that: The plug-in portion is configured as a plug-in tube, and the plug-in tube is inserted and fixed inside the open end of the main body tube.

6. The outer tube assembly according to claim 5, characterized in that: The portion of the plugging head connected to the cannula protrudes from the tube wall of the cannula to form a positioning step, and the positioning step abuts against the distal end surface of the main body tube.

7. The outer tube assembly according to claim 5, characterized in that: The portion of the outer wall of the plugging head close to the opening end is in the same plane as the outer wall of the main tube.

8. The outer tube assembly according to claim 3, characterized in that: The outer wall of the plugging head is designed to be hemispherical or hemispherical.

9. The outer tube assembly according to any one of claims 1 to 8, characterized in that: The outer tube assembly also includes a wire hook, which is rotatably arranged inside the distal end of the outer tube. The active positions of the wire hook include a wire hooking position for hooking the suture thread and a wire loosening position for loosening the suture thread.

10. A stapler, characterized in that: The stapler comprises the outer tube assembly according to any one of claims 1 to 9.

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