Stitching instrument

Abstract

In the using process of the stitching instrument, a puncture part is arranged at a needle inserting limit position and a needle withdrawing limit position in an outer sleeve in the axial direction in a reciprocating motion mode, a negative pressure source opening and closing triggering element is arranged on a shell, and the negative pressure source opening and closing triggering element is used for opening or closing a negative pressure source. The negative pressure source opening and closing triggering element is triggered when the puncture piece is in the far-end stroke so that the negative pressure source can be kept open, and the negative pressure source opening and closing triggering element is not triggered when the puncture piece is in the near-end stroke so that the negative pressure source can be kept closed. Namely, the state of the negative pressure source is automatically adjusted according to the real-time position information of the puncture piece, the negative pressure source does not need to be adjusted through manual operation, the operation difficulty is lowered, the error rate is lowered, the automation degree is improved, and the suturing efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a suture device. Background Technology

[0002] Suturing is the process of joining or reconstructing cut or fractured tissues and organs to restore their function. It is a fundamental condition for ensuring good healing and one of the most important basic surgical techniques. Different methods of suturing are required for tissues and organs in different locations.

[0003] In related technologies, the suture device applies negative pressure to the outer tube of the suture device during suturing, drawing the target tissue into the outer tube. The target tissue is then sutured using the insertion and withdrawal of the puncture needle. Specific operational steps include: before inserting the needle to puncture the target tissue, manually activating the negative pressure to create a negative pressure at the window, drawing the target tissue into the outer tube; then, puncturing the target tissue inside the outer tube using the puncture needle; after the puncture needle withdraws from the target tissue, manually deactivating the negative pressure, allowing the target tissue to exit from the outer tube; and then, rotating the suture device around the central axis of the outer tube to adjust its position for suturing other areas.

[0004] However, before inserting the needle and after withdrawing it from the target tissue, the negative pressure needs to be turned on and off manually by pressing a button. The number of times the negative pressure needs to be turned on and off increases with the number of needles inserted into the target tissue, making the operation cumbersome, with low automation and a high error rate, resulting in low suturing efficiency. Utility Model Content

[0005] Based on this, the purpose of this application is to provide a suture device that reduces the difficulty of negative pressure control, reduces the error rate, and improves the degree of automation, thereby improving suturing efficiency.

[0006] A suture device, the suture device comprising:

[0007] The outer tube has a window on its distal sidewall for the target tissue to enter. The window communicates with the internal cavity of the outer tube, and the internal cavity is also used to communicate with a negative pressure source.

[0008] Housing, the housing being connected to the outer sleeve;

[0009] A puncture element, axially reciprocatingly disposed within the outer sheath, the puncture element's travel including a distal travel and a proximal travel; and

[0010] A negative pressure source opening / closing trigger element is disposed inside the housing and is used to open or close the negative pressure source. The negative pressure source opening / closing trigger element is triggered when the puncture member is in the distal stroke to keep the negative pressure source open, and is not triggered when the puncture member is in the proximal stroke to keep the negative pressure source closed.

[0011] In one embodiment, the outer sheath has an insertion limit position and a retraction limit position inside, and the puncture member is axially reciprocating between the insertion limit position and the retraction limit position. The insertion limit position is located at the distal end of the distal stroke, and the retraction limit position is located at the proximal end of the proximal stroke.

[0012] In one embodiment, the negative pressure source opening and closing trigger element is a limit switch, and the suture device further includes:

[0013] The first push-pull member is connected to the puncture member and is movably disposed inside the housing along the axial direction, and is used to drive the puncture member to move along the axial direction Z to the needle insertion limit position or back to the needle withdrawal limit position.

[0014] The travel block is connected to the first push-pull component, and the travel block cooperates with the limit switch.

[0015] In one embodiment, the limit switch is provided with a pressing member, and the travel block is provided with a travel groove that accommodates the pressing member; the travel groove is provided with an abutting wall that abuts against the pressing member, the abutting wall including a first abutting part and a second abutting part connected sequentially along the needle insertion direction, the distance between the first abutting part and the limit switch is S1, the distance between the second abutting part and the limit switch is S2, and S1 and S2 have a difference.

[0016] In one embodiment, the first abutment portion is parallel to the axial direction of the housing, and the distance S2 between the second abutment portion and the limit switch increases along the needle insertion direction.

[0017] In one embodiment, the limit switch has a housing, and an inner wall of the housing has a mounting groove adapted to the housing, the housing being fixed inside the mounting groove.

[0018] In one embodiment, the travel block is provided with a locking block, and the first push-pull member is provided with a connecting seat, the connecting seat being provided with a slot that engages with the locking block.

[0019] In one embodiment, the inner wall of the housing is formed with a sliding groove extending in the axial direction, and the stroke block is slidably disposed in the sliding groove in the axial direction; the side of the stroke block facing away from the limit switch slides in axial direction with the bottom wall of the sliding groove.

[0020] In one embodiment, the suture device further includes a suction member for connection to the negative pressure source, the suction member being inserted inside the outer sleeve and inside the housing.

[0021] In one embodiment, the puncture element is provided with a suture hole, and the suture device further includes a hook element movable within the outer sheath, the hook element being used to hook or release the suture that passes through the target tissue with the puncture element. The movable position of the hook element includes a hooking limit position and a loosening limit position, the hooking limit position being closer to the window along the radial direction of the outer sheath than the loosening limit position. The suture device is configured such that:

[0022] When the hooking component is at its hooking limit position, the negative pressure source is in the off state;

[0023] When the hook is at the slack position, the negative pressure source is in the open state.

[0024] In one embodiment, the suture device further includes a second push-pull member; the second push-pull member is movably disposed inside the outer sleeve along the axial direction Z of the outer sleeve and is connected to the hook member in a driving connection; the second push-pull member can drive the hook member to move back and forth between the hook limit position and the loosening limit position by reciprocating along the axial direction Z.

[0025] In the aforementioned suture device, during use, the puncture element is axially reciprocatingly positioned within the outer sheath at its insertion and retraction limits. A negative pressure source opening / closing trigger element is mounted on the housing. This trigger element opens or closes the negative pressure source. It is activated when the puncture element is in its distal travel phase to keep the negative pressure source open, and deactivated when the puncture element is in its proximal travel phase to keep the negative pressure source closed. In other words, the negative pressure source automatically adjusts based on the real-time position of the puncture element, eliminating the need for manual adjustment. This reduces operational difficulty, lowers the error rate, increases automation, and significantly improves suturing efficiency. Attached Figure Description

[0026] Figure 1 This is a structural diagram of a suture device according to an embodiment of the present application, with a separate shell hidden and the needle retracted.

[0027] Figure 2 for Figure 1 Enlarged structural diagram at point A.

[0028] Figure 3 This is a structural diagram of a suture device according to an embodiment of the present application, with a separate shell hidden and in the needle insertion state.

[0029] Figure 4 for Figure 3 Enlarged structural diagram at point B.

[0030] Figure 5 The diagram shows the structure of a suture device according to an embodiment of this application, with another split shell and the first push-pull member hidden and in the needle retraction state.

[0031] Figure 6 for Figure 5 Enlarged structural diagram at point D.

[0032] Figure 7 This is a structural diagram of a suture device according to an embodiment of the present application, showing the suture device with another split shell and the first push-pull member hidden and in the needle insertion state.

[0033] Figure 8 for Figure 7 Enlarged structural diagram at point C.

[0034] Figure 9 This is a view of the structure of a stroke block according to an embodiment of this application.

[0035] Figure 10 This is another perspective structural diagram of a travel block according to an embodiment of this application.

[0036] Figure 11 This is another perspective structural diagram of a travel block according to an embodiment of this application.

[0037] Figure 12 This is a structural view of a negative pressure source opening and closing trigger element according to an embodiment of this application.

[0038] Figure 13 This is another structural view of the negative pressure source opening and closing trigger element according to an embodiment of this application.

[0039] Figure 14 This diagram shows the suture device in a first working state according to an embodiment of this application.

[0040] Figure 15 This diagram shows the suture device in a second working state according to an embodiment of this application.

[0041] Figure 16 This diagram shows the suture device in a third working state according to an embodiment of this application.

[0042] Figure 17 This diagram shows the suture device in a fourth working state according to an embodiment of this application.

[0043] Figure 18 This diagram shows the suture device in its fifth working state according to an embodiment of this application.

[0044] 10. Outer tube; 11. Window; 20. Shell; 201. Split shell; 21. Mounting groove; 22. Sliding groove; 23. Pipe outlet; 24. Movable groove; 25. Step; 30. Puncture element; 31. Threading hole; 40. First push-pull element; 41. Connecting seat; 411. Slot; 50. Stroke block; 51. Stroke groove; 511. First abutment part; 512. Second abutment part; 52. Locking block; 53. Arc-shaped surface; 60. Limit switch; 61. Pressing element; 62. Electrode plate; 63. Outer shell; 631. End face; 70. Connecting tube; 80. Grip handle; 91. Connecting rod; 92. Reset element; 93. Target tissue; 94. Suture; 95. Thread hook; 951. Sliding part; 96. Second push-pull element; 961. Slide groove; 97. Suction element. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be noted that the proximal end refers to the end of the instrument or component that is closer to the operator, and the distal end refers to the end of the instrument or component that is farther away from the operator; the axial direction refers to the direction parallel to the line connecting the center of 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.

[0047] It should also be noted that the related technologies in the background section of this application are only for the purpose of illustrating the technical problem that this application needs to solve, and these related technologies do not necessarily belong to the prior art.

[0048] See Figures 1 to 4 , Figure 1 The diagram shows a suture device according to an embodiment of this application with a split shell 201 hidden and in a needle-retracted state. Figure 2 It shows Figure 1 Enlarged structural diagram at point A. Figure 3 The diagram shows a suture device according to an embodiment of this application with a split shell 201 hidden and in the needle insertion state. Figure 4 It shows Figure 3Enlarged structural view at point B. One embodiment of this application provides a suture device, comprising: an outer sheath 10, a housing 20, a puncture element 30, and a negative pressure source on / off trigger element. For example, the negative pressure source on / off trigger element can be a limit switch 60.

[0049] Please refer to the following: Figures 14 to 18 The distal sidewall of the outer tube 10 is provided with a window 11 for the target tissue 93 to enter. The window 11 communicates with the internal cavity of the outer tube 10, which is also used to connect to a negative pressure source. The housing 20 is connected to the outer tube 10. The puncture element 30 is axially reciprocatingly disposed inside the outer tube 10.

[0050] Furthermore, a negative pressure source opening / closing trigger element 60, including but not limited to a limit switch, is disposed inside the housing 20 to open or close the negative pressure source. The trigger element 60 is activated when the puncture member 30 is in the distal travel phase, keeping the negative pressure source open; it is not activated when the puncture member 30 is in the proximal travel phase, keeping the negative pressure source closed. Thus, the working state of the negative pressure source, i.e., the negative pressure state within the internal cavity of the outer cannula 10, is controlled based on whether the puncture member 30 is in the proximal or distal travel phase. The negative pressure source's working state is directly adjusted according to the travel phase of the puncture member 30, eliminating the need for manual adjustment, which not only reduces operational difficulty but also improves suturing efficiency.

[0051] It should be noted that, in this application, "negative pressure source" refers to a device used to provide negative pressure to the inside of the outer tube. This negative pressure device may consist only of a vacuum pump, in which case "controlling the working state of the negative pressure source" refers to "controlling the working state of the vacuum pump." Alternatively, the negative pressure device may represent a vacuum system, including not only the vacuum pump but also corresponding pipelines and valves; in this case, "controlling the working state of the negative pressure source" refers to the working state of the entire vacuum system providing the corresponding negative pressure to the internal cavity of the outer tube 10.

[0052] It should also be noted that in this application, the "distal travel" is located at the distal end of the "proximal travel". When the puncture needle 30 is inserted, it first passes through the "proximal travel" and then through the "distal travel". When the puncture needle 30 is withdrawn, it first passes through the "distal travel" and then through the "proximal travel". It should be emphasized that the travel here includes multiple consecutive positions, rather than a single position.

[0053] The outer tube 10 has a smaller diameter than the inner diameter of the distal end of the housing 20, resulting in a smaller overall size and easier installation inside the housing 20. The puncture element 30 is axially movably disposed inside the outer tube 10. The puncture element 30 includes, but is not limited to, a puncture needle, which has a suture hole 31 for threading a suture 94, thereby enabling the suture 94 to puncture the target tissue 93 and perform suturing.

[0054] It should be noted that if the negative pressure source refers to the vacuum pump, then the above "opening or closing the negative pressure source" specifically refers to controlling the opening and closing of the vacuum pump; if the negative pressure source refers to the vacuum pump, the internal cavity connecting the outer sleeve 10 and the vacuum pump's opening and closing valve, then "opening or closing the negative pressure source" may specifically refer to the opening and closing of the vacuum pump, or it may refer to the opening and closing of the opening and closing valve.

[0055] In one embodiment, the outer tube 10 has an insertion limit position (such as...). Figure 3 and Figure 4 As shown or Figure 15 and Figure 17 (as shown) and the extreme positions of needle retraction (as shown) Figure 1 and Figure 2 As shown or Figure 14 , Figure 16 and Figure 18 As shown, the puncture member 30 can reciprocate axially between the needle insertion limit position and the needle withdrawal limit position. The needle insertion limit position is located at the distal end of the distal stroke, and the needle withdrawal limit position is located at the proximal end of the proximal stroke.

[0056] In other words, during the process of the puncture needle 30 advancing from the needle withdrawal limit position to the needle insertion limit position, the puncture needle 30 is initially in the proximal stroke, and the negative pressure source is in the closed state. When the puncture needle 30 enters the distal stroke, the negative pressure source is opened, and the target tissue 93 is drawn into the outer tube 10 through the window 11. The puncture needle 30 continues to advance into the target tissue 93, allowing the suture to pass through the target tissue 93, until the puncture needle 30 reaches the needle insertion limit position and completes the needle insertion. Then, the puncture needle 30 withdraws from the needle insertion limit position to the needle withdrawal limit position. During this process, the puncture needle 30 is initially in the distal stroke, and the negative pressure source is in the open state. When the puncture needle 30 withdraws into the proximal stroke, the negative pressure source is closed again, and the sutured target tissue 93 can exit the outer tube 10 through the window 11.

[0057] It is worth mentioning that if the working state of the negative pressure source is controlled manually, there is a possibility of erroneous operation in which the negative pressure source is turned off before the puncture needle 30 has withdrawn from the target tissue. The target tissue 93 is simultaneously subjected to opposing forces from the external tissue and the puncture needle 30, which may cause tissue damage. The two possible implementation methods described above automatically control the opening and closing of the negative pressure source or the negative pressure value according to the stroke position of the puncture needle, which can avoid tissue damage caused by erroneous operation of the negative pressure source.

[0058] In one embodiment, the suture device further includes a first push-pull member 40. The first push-pull member 40 is connected to the puncture member 30 and is movably disposed inside the outer sleeve 10 in the axial direction Z. The first push-pull member 40 is used to drive the puncture member 30 to move in the axial direction Z to the needle insertion limit position or back to the needle withdrawal limit position.

[0059] In this embodiment, the negative pressure source opening and closing trigger element is a limit switch, and the suture device also includes a travel block 50 that cooperates with the limit switch 60. The travel block 50 is connected to the first push-pull member 40, and the limit switch 60 is disposed on the housing 20 and connected to the controller. The limit switch 60 is disposed on the housing 20 and cooperates with the travel block 50. During the process of the travel block 50 following the first push-pull member 40 switching between the needle insertion limit position and the needle withdrawal limit position, it can drive the limit switch 60 to operate, thereby controlling the working state of the negative pressure source.

[0060] In some embodiments, the limit switch 60, driven by the limit block 50, is used to turn on or off the negative pressure source. When the negative pressure source is turned on, the window 11 can suck in the target tissue 93. When the negative pressure source is turned off, the target tissue 93 rebounds and is ejected from the window 11.

[0061] During use, when moving from the needle withdrawal limit position to the needle insertion limit position, the first push-pull component 40 drives the puncture component 30 to move distally, simultaneously driving the travel block 50 to move. The travel block 50 correspondingly drives the travel switch 60, which in turn opens the negative pressure source. This creates negative pressure at window 11, drawing the target tissue 93 into the window 11, allowing the first push-pull component 40 to puncture the target tissue 93, thus completing one suture. When returning from the needle insertion limit position to the needle withdrawal limit position, the first push-pull component 40 drives the puncture component 30 proximally to detach from the target tissue 93, simultaneously driving the travel block 50 to move. The travel block 50 correspondingly drives the travel switch 60, which in turn closes the negative pressure source. This allows the target tissue 93 drawn into window 11 to retract to the outside of window 11, ready for the next suture. Therefore, this method facilitates control of the negative pressure suction function at window 11, improving suture efficiency and reducing operational difficulty.

[0062] Please see Figure 2 and Figure 4 In one embodiment, the limit switch 60 is provided with a pressing member 61. The travel block 50 is provided with a travel groove 51 that accommodates the pressing member 61. The travel groove 51 is provided with an abutting wall that abuts against the pressing member 61. During the axial sliding process between the travel block 50 and the limit switch 60 under the drive of the first push-pull member 40, the abutting wall of the travel groove 51 abuts against the pressing member 61. Different abutting positions of the pressing member 61 and the abutting wall will generate different electrical signals, which are transmitted to the host (not shown) via the signal harness through the electrode plate 62 of the limit switch 60. The host controls the negative pressure source to operate in different working states.

[0063] Specifically, the abutment wall includes a first abutment portion 511 and a second abutment portion 512 connected sequentially along the needle insertion direction. The distance between the first abutment portion 511 and the limit switch 60 is S1, and the distance between the second abutment portion 512 and the limit switch 60 is S2, with a difference between S1 and S2. The relationship between the distances S1 and S2 can be set according to actual needs; the distance S1 can be greater than or less than the distance S2, as long as different strokes can trigger the corresponding signal generation.

[0064] In one embodiment, the first abutting portion 511 is parallel to the axial direction of the housing 20, that is, the distance S1 remains unchanged along the axial direction Z; in addition, the distance S2 between the second abutting portion 512 and the limit switch 60 tends to increase along the needle insertion direction.

[0065] It should be noted that the needle insertion direction refers to the direction from the proximal end of the proximal housing 20 to the distal end of the housing 20, such as... Figure 2 As indicated by arrow F in the diagram; the direction of needle retraction is the opposite of arrow F.

[0066] Specifically, during needle insertion, when the first abutment part 511 abuts against the pressing member 61, the pressing member 61 is pressed to the trigger stroke by the abutment wall. The negative pressure source, for example, activates the negative pressure suction function to suction the target tissue 93, allowing the target tissue 93 to enter the interior of the window 11. The first abutment part 511 has a certain length L along the axial direction. This length L is set according to the displacement of the first push-pull member 40 at the needle insertion limit position and the needle withdrawal limit position, so as to ensure that during the puncture of the target tissue 93, the negative pressure source is always in a suction state that sucks the target tissue 93 into the interior of the window 11. As some examples, the displacement of the first push-pull member 40 at the needle insertion limit position and the needle withdrawal limit position is set to M, and the length L is not limited to 0.8M to 1.2M, specifically, for example, 0.8M, 0.9M, M, 1.1M, or 1.2M, etc. Of course, the length L can also be set to any value less than 0.8M and greater than 1.2M.

[0067] Conversely, during the needle retraction process, when the second abutting part 512 and the pressing member 61 abut against each other, the distance S between the second abutting part 512 and the limit switch 60 tends to increase along the needle insertion direction. As a result, the pressing member 61 is gradually released. When the pressing distance of the pressing member 61 of the limit switch 60 is less than the trigger stroke, for example, when the negative pressure suction function is turned off, the tissue rebounds and exits the window 11 of the outer tube 10.

[0068] In some embodiments, the contact surface on the pressing member 61 that contacts the abutment wall is, but is not limited to, configured as an arc shape, so that the contact with the abutment wall is a line contact. The stroke block 50 operates more smoothly during its movement relative to the limit switch 60 in the axial direction.

[0069] In some embodiments, the limit switch 60 is specifically a mechanical push-button switch, which, compared to a sensor switch, not only has a simpler structure and smaller size but also reduces costs. Of course, as an alternative, the limit switch 60 can also be set as a sensor push-button switch.

[0070] Please see Figure 2 , Figure 4 , Figure 12 and Figure 13 In some embodiments, the limit switch 60 can be connected to the host via a signal harness or wirelessly. In this embodiment, the limit switch 60 is provided with two electrode plates 62 for electrical connection to the signal harness. Electrical connection to the host via the signal harness reduces costs compared to wireless connection.

[0071] In one embodiment, the limit switch 60 has a housing 63, and a mounting groove 21 adapted to the housing 63 is formed on the inner wall of the housing 20. The housing 63 is fixed inside the mounting groove 21. Thus, the limit switch 60 is fixed to the housing 20 and will not move axially relative to the housing 20. Furthermore, specifically, one end face 631 of the housing 63 abuts against the bottom wall of the mounting groove 21, which improves the installation stability of the limit switch 60 on the housing 20.

[0072] In some embodiments, to facilitate the processing of the housing 20, the housing 20 includes, but is not limited to, two separate housings 201 that are spliced ​​together. After the two separate housings 201 are processed independently, they are spliced ​​together. The mounting groove 21 is specifically formed at the splicing part of the two separate housings 201, so that the bottom surface of the outer shell 63 abuts against the two separate housings 201 respectively.

[0073] In some embodiments, the travel block 50 can be mounted on the first push-pull member 40 using various fasteners, including but not limited to snap-fit, adhesive, riveting, pins, screws, and bolts. The specific method can be flexibly adjusted and set according to actual needs, as long as it is fixedly connected to the first push-pull member 40 and enables the first push-pull member 40 and the travel block 50 to move synchronously along the axial direction. In this embodiment, the travel block 50 is snap-fitted onto the first push-pull member 40, which improves assembly efficiency.

[0074] In one specific embodiment, the travel block 50 is provided with a locking block 52. The first push-pull member 40 is provided with a connecting seat 41, and the connecting seat 41 is provided with a locking groove 411 that engages with the locking block 52. Thus, the travel block 50 is not directly locked onto the first push-pull member 40, but is indirectly locked onto the first push-pull member 40.

[0075] Please see Figures 5 to 8 In one embodiment, the inner wall of the housing 20 is formed with a sliding groove 22 extending in the axial direction. A stroke block 50 is slidably disposed within the sliding groove 22 in the axial direction. The side of the stroke block 50 facing away from the limit switch 60 slides axially against the bottom wall of the sliding groove 22. Thus, as the first push-pull member 40 drives the limit switch 60 to move in the axial direction, the limit switch 60 also simultaneously slides in the sliding groove 22 in the axial direction. The sliding groove 22 acts as a guide, improving operational stability.

[0076] Based on the aforementioned embodiments, when the first push-pull member 40 moves the puncture member 30 to the needle insertion limit position, the limit switch 60 abuts against the distal inner wall of the sliding groove 22 in the axial direction, for example; when the first push-pull member 40 moves the puncture member 30 to the needle withdrawal limit position, the limit switch 60 abuts against the proximal inner wall of the sliding groove 22 in the axial direction, for example.

[0077] To more clearly illustrate the structure of the travel block 50 and the travel switch 60 in this embodiment, please refer to [link / reference needed]. Figures 9 to 11 , Figures 9 to 11 The structural diagrams of the stroke block 50 from three different perspectives are shown. Furthermore, Figure 12 and Figure 13 The structural diagrams of the limit switch 60 from two different perspectives are shown.

[0078] In some embodiments, the suture device further includes a suction member 97 for connection to a negative pressure source. The suction member 97 can be disposed outside the outer sleeve 10 or inserted inside the outer sleeve 10. Its specific location and structure can be flexibly adjusted and configured according to actual needs, as long as the negative pressure generated at the suction section can draw the target tissue 93 into the window 11, thereby performing the corresponding suturing action on the target tissue 93. Specifically, when the suction member 97 is inserted inside the outer sleeve 10, the suction section of the suction member 97 is positioned corresponding to the window 11. For example, the distal end of the suction member 97, i.e., the suction section, extends to the side of the window 11, so that when the suction member 97 generates negative pressure, it can draw the target tissue 93 into the window 11. Conversely, when the suction member 97 is located outside the outer tube 10, for example, extending along the outer wall of the outer tube 10, the suction part of the suction member 97 can either extend into the inner part of the outer tube 10 through the window 11 and be positioned corresponding to the window 11; or it can have a through hole on the outer tube 10, with the suction part communicating with the through hole to generate negative pressure at the window 11 to suck up the target tissue 93; or it can extend the suction part through the outer tube 10 into the inner part of the outer tube 10 to generate negative pressure at the window 11 to suck up the target tissue 93.

[0079] In this embodiment, in order to minimize the damage to the tissue caused by the suction device 97 during the operation, such as collision and friction, the specific example is that the suction device 97 is inserted inside the outer tube 10, but it is not limited to this.

[0080] In one embodiment, the suction element 97 extends inside the outer sleeve 10 and also inside the housing 20. The suction element 97 includes, but is not limited to, suction tubing. This allows for a compact overall layout, a smaller device size, and less damage to tissues.

[0081] Please see Figure 1 and Figure 3 In some embodiments, the proximal end of the suction tube is provided with a connecting tube 70, such as a flexible tube, which is used to connect to a negative pressure source.

[0082] Please see Figures 14 to 18 In one embodiment, the puncture member 30 is provided with a suture hole 31, and the suture device also includes a hook member 95 movably disposed within the outer sheath 10. The hook member 95 is used to hook or release the suture 94 that passes through the target tissue with the puncture member 30. The movable position of the hook member 95 includes the hook limit position (e.g., Figure 16 and Figure 18 (as shown) and the extreme position of the loose line (as shown) Figure 15 and Figure 17 As shown), the hook limit position of the hook piece 95 is closer to the window 11 in the radial direction of the outer sleeve 10 than the loosening limit position, and the sewing device is configured as follows:

[0083] When the hook fitting 95 is at the hook limit position, the negative pressure source is in the off state;

[0084] When the hook part 95 is at the loosening limit position, the negative pressure source is in the open state.

[0085] In this implementation, when the puncture device 30 withdraws the needle, during the process of the suture hooking device 95 moving from the suture loosening limit position to the suture hooking limit position to hook the suture, the negative pressure source changes from the open state to the closed state, and the target tissue 93 exits the outer tube 10 through the window 11. This helps to avoid interference between the suture hooking device 95 and the tissue during suture hooking. Subsequently, when the puncture device 30 inserts the needle, during the process of the suture hooking device 95 moving from the suture hooking limit position to the suture loosening limit position to loosen the suture, the negative pressure source changes from the closed state to the open state again. This also helps to avoid interference between the suture hooking device 95 and the tissue during suture loosening. Furthermore, the change of the negative pressure source from the closed state to the open state allows the target tissue 93 to enter the outer tube 10 through the window 11 and be sutured through by the puncture device 30 for the next suture.

[0086] In one embodiment, the suture device further includes a second push-pull member 96. The second push-pull member 96 is movably disposed within the outer sleeve 10 along the axial direction Z and is connected to the hook member 95 in a driving connection. The second push-pull member 96 can drive the hook member 95 to move back and forth between the hooking limit position and the loosening limit position by reciprocating along the axial direction Z.

[0087] In one embodiment, the hook member 95 is oscillatingly disposed at the distal end of the outer sleeve 10. The second push-pull member 96 is provided with a groove 961, the sliding direction X of which is different from the axial direction Z. Optionally, the sliding direction X and the axial direction Z are perpendicular to each other. The hook member 95 has a sliding portion 951 slidably disposed within the groove 961. The second push-pull member 96 can reciprocate along the axial direction Z of the outer sleeve 10, causing the hook member 95 to oscillate back and forth between the hooking limit position and the slack line limit position. Thus, when the second push-pull member 96 reciprocates along the axial direction Z of the outer sleeve 10, the sliding portion 951 moves accordingly along the groove 961, thereby enabling the hook member 95 to oscillate back and forth between the hooking limit position and the slack line limit position. This results in a compact overall structure and a smaller footprint.

[0088] In some embodiments, the second push-pull member 96 is driven by the first push-pull member 40, so that the hooking member 95 is driven by the puncture member 30. This allows the puncture member 30 to simultaneously withdraw or advance the needle when the hooking member 95 is performing a hooking or loosening action. Thus, during suturing, only the axial sliding force of the first push-pull member 40 is needed to cause both the hooking member 95 and the puncture member 30 to move accordingly, simplifying the suturing operation. Of course, in some alternative embodiments, the first push-pull member 40 can also be driven by the second push-pull member 96, so that the puncture member 30 is driven by the hooking member 95.

[0089] In some embodiments, to improve the operational stability of the first push-pull member 40, the sidewall of the first push-pull member 40 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the sidewall of the first push-pull member 40 facing the suction tube is adapted to the shape of the outer wall of the suction tube. This enables stable operation of the first push-pull member 40 along the axial direction Z. Similarly, the sidewall of the second push-pull member 96 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the sidewall of the second push-pull member 96 facing the suction tube is adapted to the shape of the outer wall of the suction tube.

[0090] Please see Figures 14 to 18 Specifically, the suturing operation on, for example, a sampling channel includes the following steps:

[0091] Step S110: The suture device is inserted into the preset position inside the sampling channel. At this time, the puncture element 30 is at the needle withdrawal limit position, and the hook element 95 is at the hooking limit position. Figure 14As shown;

[0092] Step S120: The negative pressure source generates negative pressure to adsorb the target tissue 93 on one sidewall of the sampling channel. The adsorbed target tissue 93 protrudes from the inner wall of the sampling channel, causing the puncture element 30 to move, allowing the suture 94 to pass through the target tissue 93. At the same time, the suture hooking element 95 moves from the hooking limit position to the loosening limit position, avoiding interference between the hooking element 95 and the puncture element 30. Figure 15 As shown;

[0093] Step S130: The puncture device 30 is withdrawn, and simultaneously the suture hook 95 moves from the loose suture limit position to the suture hook limit position. During the movement to the suture hook limit position, it can smoothly hook the suture 94 that passes through the target tissue 93. Figure 16 As shown;

[0094] Step S140: The suture device can be rotated at a certain angle so that the window 11 faces other parts of the sampling channel, or it can remain in the same position. When the suture device needs to be rotated to another position, the negative pressure source is first released to avoid interference with the target tissue 93 during rotation. Specifically, taking the suture device rotating to 180° as an example, the negative pressure source adsorbs the target tissue 93 on the opposite side wall of the sampling channel. The adsorbed target tissue 93 protrudes from the inner wall of the sampling channel, facilitating the movement of the puncture element 30 to allow the suture 94 to pass through the target tissue 93. Simultaneously, the hook element 95 moves from the hooking limit position to the loosening limit position, preventing interference between the hook element 95 and the puncture element 30. Figure 17 As shown;

[0095] Step S150: The puncture member 30 is retracted, and simultaneously the hook member 95 moves from the loosening limit position to the hooking limit position. During the movement to the hooking limit position, it can smoothly hook the suture 94 on the puncture member 30 that has passed through the target tissue 93. The suture 94 hooked by the hook member 95 passes through the suture 94 that has passed through the target tissue 93 as in step S130. Specifically, as follows... Figure 18 As shown.

[0096] In some embodiments, specifically, during the process of the first push-pull member 40 driving the puncture member 30 to withdraw the needle, the second push-pull member 96 also simultaneously drives the hook member 95 to hook the suture 94 that has passed through the target tissue 93, preventing the suture 94 from exiting the target tissue 93 with the puncture member 30; in addition, during the process of the first push-pull member 40 driving the puncture member 30 to puncture the target tissue 93 again, the second push-pull member 96 also simultaneously drives the hook member 95 to release the previously hooked suture 94, so that the hook member 95 will not interfere with the puncture member 30 in the needle insertion state, and the puncture member 30 can drive the suture 94 to smoothly complete the puncture operation and enter the previous threading loop, and when the puncture member 30 drives the suture 94 to exit the target tissue 93 again, the second push-pull member 96 also simultaneously drives the hook member 95 to hook the suture 94 that has passed through the target tissue 93 again, preventing the suture 94 from exiting the target tissue 93 with the puncture member 30. Thus, with the cooperation of the hook 95, the suturing of the target tissue 93 can be easily completed. In addition, the first push-pull member 40 and the second push-pull member 96 are movably inserted into the inside of the outer tube 10, so that they enter the sampling channel together with the outer tube 10. The negative pressure generated by the negative pressure source connected to the internal cavity of the outer tube 10 draws the target tissue 93 into the inside of the outer tube 10, thereby realizing the suturing operation of the target tissue 93. In this way, the first push-pull member 40 and the second push-pull member 96 do not directly contact the inner wall of the sampling channel, which can reduce the collision and friction damage to the inner wall tissue of the sampling channel.

[0097] Based on the aforementioned embodiment, a signal cable groove is formed on the inner wall of the housing 20, extending to the conduit outlet 23 to guide the signal cable harness (not shown) welded to the limit switch 60. Furthermore, a conduit outlet 23 is provided on the proximal inner wall of the housing 20 for leading out the suction component 97 and the signal cable harness during assembly.

[0098] In one embodiment, the suture device further includes a handle 80 and a connecting rod 91. The handle 80 is located outside the housing 20, and one end of the handle 80 is rotatably connected to the housing 20. One end of the connecting rod 91 is rotatably connected to the handle 80. A movable groove 24 is formed on the housing 20, and the connecting rod 91 is movably inserted into the movable groove 24. The other end of the connecting rod 91 is rotatably connected to the first push-pull member 40. When the handle 80 is pressed, causing the other end of the handle 80 to move towards the housing 20, the handle 80 drives the connecting rod 91 to move, and the connecting rod 91 drives the first push-pull member 40 to move towards the distal end of the outer sleeve 10.

[0099] In use, pressing the handle 80 moves the other end of the handle 80 closer to the housing 20. The handle 80 drives the connecting rod 91, which in turn drives the first push-pull member 40 toward the distal end of the outer sleeve 10, thus enabling the puncture member 30 to insert the needle axially. Therefore, it is not necessary to use a cylinder or motor screw inside the housing 20 to drive the axial movement of the first push-pull member 40. Using the handle 80 and connecting rod 91 as the power mechanism to drive the axial movement of the first push-pull member 40 simplifies the structure, reduces costs, and allows for a smaller housing size.

[0100] Please see Figures 1 to 4 In one embodiment, the suture device further includes a reset member 92. The reset member 92 is connected to the first push-pull member 40 and the housing 20, respectively. The reset member 92 is used to reset the first push-pull member 40 from the needle insertion limit position to the needle withdrawal limit position. Specifically, the reset member 92 includes, but is not limited to, an elastic reset member 92, such as a spring, elastic strip, or elastic rope, as long as it can reset the first push-pull member 40 from the needle insertion limit position to the needle withdrawal limit position. Thus, on the one hand, pressing the handle 80 to the closed state causes the handle 80 to move the first push-pull member 40 from the needle withdrawal limit position to the needle insertion limit position via the connecting rod 91, simultaneously allowing the reset member 92 to deform and store elastic potential energy; on the other hand, when the handle 80 is released, the reset force of the reset member 92 allows the first push-pull member 40 to reset from the needle insertion limit position to the needle withdrawal limit position, while the handle 80 resets to the open state, that is, from... Figure 4 The state shown moves to Figure 2 The state shown.

[0101] In some specific embodiments, the movable groove 24 extends axially, thereby providing axial space for the movement of the connecting rod 91. Specifically, the movable groove 24 can also slide with the connecting rod 91 to guide its rotation, thus preventing the connecting rod 91 from shifting to either side when the handle 80 is pressed, making the pressing action more stable and reliable. Furthermore, the distal end of the handle 80 is rotatably connected to the housing 20, and the proximal end of the handle 80 is rotatably connected to the proximal end of the connecting rod 91. The handle 80 and the connecting rod 91 are set at an acute angle, and the distal end of the connecting rod 91 is rotatably connected to the first push-pull member 40 at an included angle. When the grip handle 80 is pressed, the grip handle 80 drives the proximal end of the connecting rod 91 to move, causing the distal end of the connecting rod 91 to move the first push-pull member 40 axially toward the distal end of the outer sleeve 10, thereby driving the puncture member 30 to insert the needle; conversely, when the grip handle 80 is released, the puncture member 30, the first push-pull member 40, and the grip handle 80 are reset under the reset force of the reset member 92.

[0102] In some embodiments, the number of grip handles 80 is at least one, including but not limited to one, two, three, four or more, which can be flexibly adjusted and set according to actual needs. When there are multiple grip handles 80, all grip handles 80 are arranged at equal intervals around the circumference of the housing 20, and multiple connecting rods 91 are correspondingly set and each corresponds to one of the grip handles 80. In this way, during the gripping process, all parts of the first push-pull member 40 are subjected to force synchronously, the force is more balanced, and the movement in the axial direction is more stable and reliable.

[0103] In one embodiment, there are two grips 80 and two connecting rods 91, which are arranged in a one-to-one correspondence. The two grips 80 are respectively arranged on opposite sides of the housing 20. In this way, on the one hand, the number of grips 80 is appropriate, which facilitates gripping operation; on the other hand, during the gripping process, all parts of the first push-pull member 40 are subjected to force synchronously, the force is more balanced, and the movement in the axial direction is more stable and reliable.

[0104] In one embodiment, each grip 80 forms a receiving groove for receiving the housing 20. When both grips 80 are pressed, causing them to move to the closed position, the two grips 80 abut against each other, and opposite sides of the housing 20 are respectively received in the two receiving grooves, as shown. Figure 3 and Figure 4 As shown. Thus, when the two grips 80 abut against each other, pressing can no longer continue, indicating that the pressing action is complete and the puncture member 30 performs one needle insertion action. In addition, since the housing 20 is housed in two receiving grooves on opposite sides, the overall structure is compact and the overall size can be reduced.

[0105] In some embodiments, when the two grip handles 80 move to the closed position, the cross-sectional profile of the integral structure formed by the two grip handles 80 along the axial direction includes, but is not limited to, regular shapes such as square, waist-shaped, elliptical, or circular, as well as other irregular shapes. Thus, during gripping, the outer contour of the integral structure does not injure the hand, while facilitating gripping operation.

[0106] In some embodiments, the receiving grooves of each grip 80 are adapted to the shape of the outer side wall of the housing 20, thereby helping to reduce the overall size.

[0107] Please see Figure 2 and Figure 4In some embodiments, the reset member 92 is a spring sleeved on the first push-pull member 40. The inner wall of the housing 20 has a step 25, and the first push-pull member 40 has a connecting seat 41. The opposite ends of the reset member 92 abut against the connecting seat 41 and the step 25, respectively. The stroke block 50 is fixedly mounted on the connecting seat 41, and the stroke block 50 also has a clearance groove for avoiding the proximal end of the reset member 92. Thus, under the reset force of the reset member 92, the first push-pull member 40, the puncture member 30, and the stroke block 50 can automatically reset from the needle insertion limit position to the needle withdrawal limit position. Furthermore, the clearance groove of the stroke block 50 avoids the proximal end of the spring, thus preventing interference with the spring and ensuring smooth reset operation. Simultaneously, the structure is compact, reducing the overall size.

[0108] Please see Figure 2 , Figure 4 and Figure 9 In some embodiments, the stroke block 50 has an arcuate portion 53 that, during assembly, accommodates the proximal end of the spring, thereby avoiding the proximal end of the spring.

[0109] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0110] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A suture device, characterized in that, The suture device includes: The outer tube has a window on its distal sidewall for the target tissue to enter. The window communicates with the internal cavity of the outer tube, and the internal cavity is also used to communicate with a negative pressure source. Housing, the housing being connected to the outer sleeve; A puncture element, axially reciprocatingly disposed inside the outer sheath, the puncture element's travel including a distal travel and a proximal travel; and A negative pressure source opening / closing trigger element is disposed inside the housing and is used to open or close the negative pressure source. The negative pressure source opening / closing trigger element is triggered when the puncture member is in the distal stroke to keep the negative pressure source open, and is not triggered when the puncture member is in the proximal stroke to keep the negative pressure source closed.

2. The suture device according to claim 1, characterized in that, The outer tube has an insertion limit position and a withdrawal limit position inside. The puncture member can reciprocate axially between the insertion limit position and the withdrawal limit position. The insertion limit position is located at the distal end of the distal stroke, and the withdrawal limit position is located at the proximal end of the proximal stroke.

3. The suture device according to claim 1, characterized in that, The negative pressure source opening and closing trigger element is a limit switch, and the suture device also includes: The first push-pull member is connected to the puncture member and is movably disposed inside the housing along the axial direction, and is used to drive the puncture member to advance or retract the needle along the axial direction Z. The travel block is connected to the first push-pull component, and the travel block cooperates with the limit switch.

4. The suture device according to claim 3, characterized in that, The limit switch is provided with a pressing element, and the limit block is provided with a limit groove that encloses the pressing element; the limit groove is provided with an abutting wall that abuts against the pressing element, and the abutting wall includes a first abutting part and a second abutting part connected in sequence along the needle insertion direction, the distance between the first abutting part and the limit switch is S1, the distance between the second abutting part and the limit switch is S2, and S1 and S2 have a difference.

5. The suture device according to claim 4, characterized in that, The first abutting part is parallel to the axial direction of the housing, and the distance S2 between the second abutting part and the limit switch increases along the needle insertion direction.

6. The suture device according to claim 3, characterized in that, The limit switch has a housing, and a mounting groove adapted to the housing is formed on the inner wall of the housing. The housing is fixed inside the mounting groove.

7. The suture device according to claim 3, characterized in that, The travel block is provided with a locking block, and the first push-pull member is equipped with a connecting seat, which is provided with a slot that engages with the locking block.

8. The suture device according to claim 3, characterized in that, The inner wall of the housing is formed with a sliding groove extending in the axial direction, and the stroke block is slidably disposed in the sliding groove in the axial direction; the side of the stroke block facing away from the limit switch slides in axial direction with the bottom wall of the sliding groove.

9. The suture device according to claim 1, characterized in that, The suture device also includes a suction device for connection to the negative pressure source, the suction device being inserted inside the outer sleeve and inside the housing.

10. The suture device according to any one of claims 1-8, characterized in that, The puncture element is provided with a suture hole, and the suture device further includes a hook element movable within the outer sheath. The hook element is used to hook or release the suture that passes through the target tissue with the puncture element. The movable position of the hook element includes a hooking limit position and a loosening limit position. The hooking limit position of the hook element is closer to the window along the radial direction of the outer sheath than the loosening limit position. The suture device is configured as follows: When the hooking component is at its hooking limit position, the negative pressure source is in the off state; When the hook is at the slack position, the negative pressure source is in the open state.

11. The suture device according to claim 10, characterized in that, The sewing device further includes a second push-pull member; the second push-pull member is movably disposed inside the outer sleeve along the axial direction Z of the outer sleeve and is connected to the hook member in a transmission manner; the second push-pull member can drive the hook member to move back and forth between the hook limit position and the loosening limit position by reciprocating along the axial direction Z.

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