Stitching instrument

Abstract

The invention provides a stitching instrument, and relates to the technical field of medical instruments. The stitching instrument comprises a driving part and an executing part, the driving part is used for being connected with an endoscope, and the executing part is detachably connected with the driving part. By the adoption of the stitching instrument, the execution part can be detached and replaced, the problems that medical resources are wasted and consumable cost is high due to the fact that the whole stitching instrument is used as a disposable consumable are solved, repeated use of devices such as a transmission part and a driving part can be achieved, and medical cost is reduced.

Description

Technical Field

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

[0002] In endoscopic minimally invasive surgery, especially endoscopic procedures performed through the natural cavities of the digestive tract, the relatively limited surgical space necessitates the use of suture devices in conjunction with the endoscope, requiring sophisticated drive mechanisms to ensure precise needle manipulation. However, given that the suture device directly interacts with the lesion tissue, manual operation makes it difficult to guarantee thorough sterilization; therefore, this device can only be used as a single-use medical consumable. The high manufacturing cost of its drive mechanism directly contributes to a significant increase in the overall cost of medical consumables. Summary of the Invention

[0003] The purpose of this invention is to provide a suture device to alleviate the technical problem that the cost of medical consumables is too high in the prior art because the suture device is a disposable instrument.

[0004] In a first aspect, the suture device provided by the present invention includes a drive unit and an execution unit, wherein the drive unit is used to connect to an endoscope, and the execution unit is detachably connected to the drive unit.

[0005] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the execution unit includes a needle holder and a suture needle, the suture needle being movably connected to the needle holder; The needle holder is detachably connected to the drive unit. When the needle holder is connected to the drive unit, the suture needle establishes a transmission connection with the drive unit.

[0006] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the needle holder is configured as a visible structure.

[0007] In conjunction with the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the execution unit and the drive unit are axially connected or separated, and are coupled or decoupled by relative rotation.

[0008] In conjunction with the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the driving part includes a sleeve, and the sleeve is connected to the actuating part by a thread or a snap-fit.

[0009] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the sleeve is provided with at least one limiting block; the limiting block is adapted to the actuator and restricts the actuator from rotating relative to the sleeve about the axis of the sleeve.

[0010] In conjunction with the fifth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the actuator is provided with a limiting groove and a limiting partition, and the limiting groove and the limiting partition are arranged sequentially at intervals along the circumference of the actuator; When the sleeve and the actuator are installed in place by threaded connection, at least one of the limiting blocks passes over the limiting barrier and engages in the limiting groove.

[0011] In conjunction with the fifth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the actuator is provided with a slot extending axially along the needle holder and a slot extending circumferentially along the actuator and communicating with the slot; Both the slot and the card slot are adapted to the limiting block.

[0012] In conjunction with the seventh possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the actuator is provided with a limiting groove and a limiting partition, and the limiting groove, the limiting partition and the slot are arranged sequentially at intervals along the circumference of the actuator; When the actuator is installed, the limiting block is inserted along the slot. The actuator rotates relative to the sleeve, causing the limiting block to slide along the slot and pass over the limiting barrier to engage with the limiting groove.

[0013] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a ninth possible implementation of the first aspect, wherein the sleeve is connected to the support, and the support is connected to the distal end of the endoscope.

[0014] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a tenth possible implementation of the first aspect, wherein the sleeve is provided with a limiting strip; The needle holder is provided with an alignment groove corresponding to the limiting strip, and a side slot that connects to the alignment groove and extends circumferentially along the needle holder. When the actuator is installed, the limiting strip is inserted from the alignment groove, and the limiting strip is slidably fitted into the side slot by rotating the actuator relative to the sleeve.

[0015] In conjunction with the first possible implementation of the first aspect, the present invention provides an eleventh possible implementation of the first aspect, wherein the driving unit is equipped with a transmission member corresponding to the suture needle and a driving member that is transmissionally connected to the transmission member; When the actuator is connected to the drive unit, the transmission member is connected to the suture needle.

[0016] In conjunction with the eleventh possible implementation of the first aspect, the present invention provides a twelfth possible implementation of the first aspect, wherein the driving member includes a gear and the transmission member includes a gear ring meshing with the gear.

[0017] In conjunction with the eleventh possible implementation of the first aspect, the present invention provides a thirteenth possible implementation of the first aspect, wherein the transmission member is connected to an elastic column; The suture needle is provided with a locking position that is adapted to the elastic column. One end of the locking position is provided with a one-way limiting part and the other end is provided with an outgoing inclined surface. When the transmission component rotates in the first direction, the elastic column engages with the locking position and abuts against the one-way limiting part, thereby driving the tip of the suture needle to move in the first direction; When the transmission component rotates in a second direction away from the first direction, the elastic column disengages from the locking position along the guide slope.

[0018] In conjunction with the first possible implementation of the first aspect, the present invention provides a fourteenth possible implementation of the first aspect, wherein the suture needle is connected to a suture thread, the suture thread includes a biodegradable segment and a non-biodegradable segment, one end of the biodegradable segment is connected to the suture needle, and the other end of the biodegradable segment is connected to the non-biodegradable segment; The length of the biodegradable segment is greater than or equal to 10 mm.

[0019] In conjunction with the first aspect, the present invention provides a fifteenth possible implementation of the first aspect, wherein the driving unit and the executing unit are provided with corresponding alignment marks.

[0020] The embodiments of the present invention bring the following beneficial effects: by using a drive unit to connect to the endoscope and making the execution unit detachably connected to the drive unit, the execution unit can be disassembled, cleaned and replaced, which helps to alleviate the problem of high medical consumable costs caused by the use of the suture device as a disposable consumable.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the suture device and endoscope provided in an embodiment of the present invention; Figure 2 Schematic diagram of the drive unit of the suture provided in an embodiment of the present invention Figure 1 ; Figure 3 Schematic diagram of the drive unit of the suture provided in an embodiment of the present invention Figure 2 ; Figure 4 A front view of the drive unit of the suture device and the endoscope provided in an embodiment of the present invention; Figure 5 Schematic diagram of the actuator of the suture provided in the embodiment of the present invention Figure 1 ; Figure 6 Schematic diagram of the actuator of the suture provided in the embodiment of the present invention Figure 2 ; Figure 7 Cross-sectional view of the needle holder of the suture provided in an embodiment of the present invention. Figure 1 ; Figure 8 Cross-sectional view of the needle holder of the suture provided in an embodiment of the present invention. Figure 2 ; Figure 9 Schematic diagram of the actuator of the suture provided in the embodiment of the present invention Figure 3 ; Figure 10 A partially enlarged view of the needle holder of the suture device provided in an embodiment of the present invention; Figure 11 A partial schematic diagram showing the limiting block, limiting groove, and limiting partition of the first type of suture provided in the embodiment of the present invention unfolded along the circumference of the sleeve body; Figure 12 A partial schematic diagram showing the limiting block, limiting groove, and limiting partition of the second type of suture provided in the embodiment of the present invention unfolded along the circumference of the sleeve body; Figure 13 A partial schematic diagram showing the limiting block, limiting groove, and limiting partition of the third type of suture provided in the embodiment of the present invention unfolded along the circumference of the sleeve body; Figure 14 A cross-sectional view of the suture device provided in an embodiment of the present invention in its assembled state; Figure 15 A schematic diagram of the suture needle of the suture device provided in an embodiment of the present invention; Figure 16 This is a schematic diagram of the suture device provided in an embodiment of the present invention during suturing operations.

[0024] Icons: 100-Drive unit; 110-Sleeve; 111-Limiting block; 112-Limiting strip; 120-Bracket; 130-Transmission component; 140-Drive unit; 150-Elastic column; 200-Actuating unit; 201-First edge; 202-First corner; 203-Arch top; 204-Second corner; 205-Second edge; 206-First side opening; 207-Second side opening 210-Needle holder; 211-Slot; 212-Card slot; 213-Limiting groove; 214-Limiting barrier; 215-Alignment groove; 216-Side slot; 217-Hinge shaft; 218-Card engaging part; 219-Limiting ring; 220-Suture needle; 221-Card holder; 222-One-way limiting part; 223-Exit bevel; 230-End cap; 300-Endoscope; 400-Tissue to be sutured. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used only to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] like Figure 1As shown, the suture device provided in this embodiment of the invention includes a drive unit 100 and an execution unit 200. The drive unit 100 is used to connect to the endoscope to achieve integrated adaptation with existing endoscope systems. The execution unit 200 is detachably connected to the drive unit 100, which facilitates independent cleaning, disinfection or replacement of the execution unit after surgery, thereby reducing the overall cost of medical consumables and avoiding the waste of resources and economic burden caused by treating the entire set of equipment as disposable consumables.

[0029] In an embodiment of the present invention, see Figure 5 and Figure 6 The actuator 200 includes a needle holder 210 and a suture needle 220. The suture needle 220 is mounted on the needle holder 210 via a movable connection structure, allowing it to move relative to the needle holder 210 under a driving force to complete the puncture and suturing actions. The needle holder 210 serves as the main supporting structure of the actuator 200, on the one hand fixing and guiding the movement trajectory of the suture needle 220, and on the other hand enabling a detachable connection with the drive unit 100.

[0030] See Figure 5 , Figure 6 and Figure 9 An end cap 230 is connected to the distal end of the needle holder 210 via a hinge shaft 217. The hinge shaft 217 is spatially perpendicular to the axis of the needle holder 210, allowing the end cap 230 to be flipped open relative to the needle holder 210. This facilitates the inspection and maintenance of the suture needle 220 installed between the needle holder 210 and the end cap 230. A protrusion is provided on the outer ring of the end cap 230 away from the hinge shaft 217. The needle holder 210 has a corresponding locking part 218. The end cap 230 expands radially away from the hinge shaft 217, engaging the protrusion with the locking part 218, thereby ensuring that the end cap 230 stably covers the distal end of the needle holder 210.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 Figure 10 and Figure 14 As shown, the drive unit 100 includes a sleeve 110, which is detachably connected to the needle holder 210 via a threaded or snap-fit ​​connection. When the needle holder 210 is connected to the drive unit 100, the suture needle 220 establishes a transmission connection with the drive unit 100. In an optional embodiment, a rotary locking mechanism can be added to lock the sleeve 110 and the needle holder 210 relative to each other, thereby improving connection stability.

[0032] The sleeve 110 is provided with at least one limiting block 111; the needle holder 210 is provided with a slot 211 extending axially along the needle holder 210, and a groove 212 extending circumferentially along the needle holder 210 and communicating with the slot 211; both the slot 211 and the groove 212 are adapted to the limiting block 111. The slot 211 and the groove 212 together form an L-shaped slide structure, and both are adapted to the limiting block 111. When installing the actuator 200, the operator inserts the needle holder 210 axially into the sleeve 110, causing the limiting block 111 to first enter the slot 211; then, the operator rotates the needle holder 210 around its axis, causing the limiting block 111 to move from the slot 211 into the groove 212, thus achieving axial positioning and anti-disengagement connection between the needle holder 210 and the sleeve 110.

[0033] In an optional embodiment, the suture needle 220 is connected to a suture thread, which includes a biodegradable segment and a non-biodegradable segment. One end of the biodegradable segment is connected to the suture needle 220, and the other end is connected to the non-biodegradable segment. The length of the biodegradable segment is greater than or equal to 10 mm to ensure that the biodegradable segment has sufficient usable length to independently complete at least one complete tissue penetration and knotting process. The biodegradable segment is made of a bioabsorbable material, such as polylactic acid (PLA), polyglycolic acid (PGA), or copolymers thereof (such as PLGA), and its degradation cycle is adapted to the healing time of the target tissue. The non-biodegradable segment is made of a non-absorbable polymeric material (such as polypropylene, polyethylene terephthalate PET, or nylon) to provide long-term mechanical support or serve as a functional carrier for subsequent traction after the biodegradable segment degrades.

[0034] In another alternative embodiment, the suture is made entirely of a single biodegradable material; that is, the entire suture, starting from the suture needle 220, is composed of a bioabsorbable material. Its composition, molecular weight, and crystallinity are controlled to match its overall degradation behavior with the tissue repair kinetics of the target surgical site. This entirely biodegradable suture is suitable for minimally invasive or endoscopic suturing procedures that do not require long-term postoperative tension maintenance and are sensitive to foreign body residue.

[0035] In an optional embodiment, the needle holder 210 is configured as a transparent or openwork visualization structure, allowing observation of the state of the suture needles 220 inside the needle holder 210.

[0036] Furthermore, the proximal end of the needle holder 210 is configured as an annular base for docking with the sleeve 110, and the distal end is configured as a C-shaped structure. The outer ring of the C-shaped structure extends along a circular curve, and the inner ring is configured as a first side opening 206, a first edge 201, a first corner 202, an arched top 203, a second corner 204, a second edge 205, and a second side opening 207 connected in sequence. Any two adjacent segments of the first side opening 206, the first edge 201, the first corner 202, the arch top 203, the second corner 204, the second edge 205, and the second side opening 207 are connected by an arc transition. The first side opening 206, the first edge 201, the first corner 202, the arch top 203, the second corner 204, the second edge 205, and the second side opening 207 form a non-circular inner ring structure. While ensuring that the inner ring of the needle holder 210 has a sufficiently large opening to allow the endoscope 300 to have a sufficient field of view, the inner ring of the needle holder 210 forms a sufficiently strong support structure to prevent the needle holder 210 from deforming during the suturing operation.

[0037] It should be noted that in this embodiment, the actuator 200 and the drive unit 100 are axially connected, and coupling (locking) or decoupling (unlocking) are achieved through relative rotation of the snap-fit ​​or threaded engagement. The drive unit 100 is connected to the actuator 200 to drive the suture needle 220 to move along an arc trajectory around the axis of the needle holder 210.

[0038] In an optional embodiment, the actuator 200 is provided with a limiting groove 213 and a limiting barrier 214, which are arranged sequentially at intervals along the circumference of the actuator 200. When the sleeve 110 and the actuator 200 are installed in place by threaded engagement, at least one limiting block 111 passes over the limiting barrier 214 and engages in the corresponding limiting groove 213, and a "click" sound is generated as an installation prompt. The engagement of the limiting block 111 with the limiting groove 213 prevents the actuator 200 from becoming loose relative to the sleeve 110.

[0039] Furthermore, to enhance the stability of the connection and prevent accidental rotation and loosening, the needle holder 210 is provided with a limiting groove 213 and a limiting barrier 214. The limiting groove 213, the limiting barrier 214, and the locking groove 212 are arranged sequentially at intervals along the circumference of the needle holder 210. When installing the actuator 200, the limiting block 111 is inserted into the slot 211. By rotating the needle holder 210 relative to the sleeve 110, the limiting block 111 slides along the locking groove 212 and passes over the limiting barrier 214 to engage with the limiting groove 213. After completing the initial rotational locking, continuing to rotate the needle holder 210 allows the limiting block 111 to pass over the limiting barrier 214 and enter the limiting groove 213, achieving secondary locking. This structure not only improves the connection rigidity but also provides clear tactile feedback, indicating to the user that reliable assembly has been completed. When the suture needle 220 performs puncture and sealing actions, the limiting block 111 is constrained within the limiting groove 213, thereby preventing the actuator 200 from becoming loose.

[0040] It should be noted that, see Figure 11 , Figure 12 and Figure 13 To facilitate the movement of the limiting block 111 over the limiting barrier 214 from the slot 212, an arc-shaped or planar angle is provided at the end of the limiting barrier 214 near the slot 212. The angle is 15° to 45°, with smaller angles making it easier to move over. Alternatively, the angle can be set on the limiting block 111 itself, in which case the angle of the limiting barrier 214 can be set to 15° to 90°, preferably 45° to 90°. Furthermore, the angle of the limiting block 111 can be the same as the angle of the limiting barrier 214, allowing the opposing inclined surfaces to contact and slide relative to each other, thus facilitating the movement of the limiting block 111 over the limiting barrier 214. The limiting block 111 can slide along the slot 212 until it moves over the limiting barrier 214 along the arc-shaped or planar angle and enters the limiting groove 213. Furthermore, the end of the limiting partition 214 near the slot 212 can be configured as a transition section with rounded corners, bevels, and rounded corners distributed sequentially. Additionally, rounded or beveled corners can be provided on both sides of the limiting groove 213. Depending on the elasticity of the material, the bevel angle range can be set from 45° to 90°, requiring a relatively large external force to complete the disassembly operation. The rounded or beveled corners can also be provided on the limiting block 111, similarly providing a sliding guiding effect. When the limiting block 111 is engaged within the limiting groove 213, it is clamped between the two side walls of the limiting groove 213, resulting in more stable positioning and facilitating the disassembly operation by allowing the limiting block 111 to pass over the limiting partition 214 from the limiting groove 213.

[0041] See Figure 3 , Figure 4 and Figure 6The distal ends of the slot 212, the limiting block 214 and the limiting groove 213 have a limiting ring 219 extending circumferentially along the needle holder 210. When installing the suture device, the limiting block 111 is inserted along the slot 211 until it abuts against the limiting ring 219. Then the needle holder 210 is rotated around the axis. With the limiting block 111 abutting against the limiting ring 219, it can be ensured that the limiting block 111 accurately enters the slot 212.

[0042] Both the limiting block 111 and the limiting strip 112 are located at the distal end of the inner side of the sleeve 110, and the slot 211 extends from the proximal end of the needle holder 210 to the distal end to communicate with the card slot 212. After the limiting block 111 passes the limiting partition 214 and engages in the limiting groove 213, the distal end of the sleeve 110 remains in contact with the limiting ring 219, thereby ensuring that the actuator 200 is axially and stably positioned relative to the drive unit 100.

[0043] In a preferred embodiment, the limiting partition 214 and its surrounding structure (including the areas on both sides of the slot 211) are made of plastic, which has a certain elastic deformation capability. As the limiting block 111 passes over the limiting partition 214, the limiting partition 214 is compressed and contracted axially inward towards the needle holder 210, and then springs back to its original state after passing over, so that the limiting block 111 is tightly engaged in the limiting groove 213. The torque applied manually when installing or removing the actuator 200 is not sufficient to make the limiting block 111 pass over the limiting partition 214 during the sewing process, thereby ensuring that the needle holder 210 and the sleeve 110 are firmly connected. In addition, the limiting block 111 can be made of an elastic deformable material. The limiting block 111 is squeezed and deformed to pass through the limiting barrier 214. After passing through the limiting barrier 214, the limiting block 111 rebounds and fits tightly in the limiting groove 213, which can also ensure that the needle holder 210 and the sleeve 110 are firmly connected.

[0044] In this embodiment, the sleeve 110 is fixedly connected to the bracket 120, which is used to connect to the distal outer surface of the endoscope 300. Stable installation can be achieved, for example, through clamping, bonding, or a quick-release interface. Thus, the entire suture device can enter the body cavity synchronously with the endoscope 300, enabling minimally invasive tissue suturing operations.

[0045] Furthermore, to achieve more precise angular alignment and prevent mis-installation, the sleeve 110 is provided with a limiting strip 112; the needle holder 210 is provided with an alignment groove 215 corresponding to the limiting strip 112, and a side slot 216 connecting to the alignment groove 215 and extending circumferentially along the needle holder 210; when installing the actuator 200, the limiting strip 112 is inserted from the alignment groove 215, and the limiting strip 112 slides into the side slot 216 by rotating the needle holder 210 relative to the sleeve 110. In an optional embodiment, multiple limiting strips 112 are provided at intervals along the circumference of the sleeve 110, and the needle holder 210 is provided with multiple side slots 216 corresponding one-to-one with the multiple limiting strips 112. During installation, the limiting strip 112 is first inserted from the alignment groove 215, and slides into the side slot 216 as the needle holder 210 rotates. With the coordinated operation of the limiting block 111 and the slot 212, and the limiting strip 112 and the side slot 216, precise axial and circumferential positioning is ensured, and assembly direction errors or deviations are effectively prevented, thereby improving the safety and reliability of the equipment.

[0046] To achieve drive control of the suture needle 220, a transmission mechanism is provided inside the drive unit 100. Specifically, the drive unit 100 is equipped with a transmission component 130 corresponding to the suture needle 220 and a drive component 140 that drives the transmission component 130. When the actuator 200 is connected to the drive unit 100, the transmission component 130 can establish an effective transmission connection with the suture needle 220, transmitting driving force to the suture needle 220, thereby driving it to perform suturing actions.

[0047] The drive component 140 includes a gear, and the transmission component 130 includes a gear ring that meshes with the gear. The gear assembly, with the transmission component 130 including the gear ring that meshes with the gear, allows power input by driving the gear to rotate via a motor or manually operated flexible metal shaft or similar device.

[0048] The transmission component 130 is also connected to an elastic column 150, which can be made of a spring plunger or an elastic polymer material and has a certain elastic extension and contraction capability.

[0049] like Figure 2 , Figure 3 and Figure 15As shown, the suture needle 220 is provided with a locking position 221 adapted to the elastic post 150. One end of the locking position 221 is provided with a one-way limiting part 222, and the other end is provided with a guide slope 223. When the transmission member 130 rotates in the first direction, the elastic post 150 engages in the locking position 221 and abuts against the one-way limiting part 222, thereby driving the tip of the suture needle 220 to move in the first direction (e.g., clockwise). When the transmission member 130 rotates in the second direction opposite to the first direction (e.g., counterclockwise), the elastic post 150 disengages from the locking position 221 along the guide slope 223, releasing the transmission connection. At this time, the suture needle 220 can be fixed under the pressure of the spring plate, and the elastic post 150 returns to its original position with the transmission member 130. The above-mentioned one-way transmission mechanism realizes the functional characteristics of forward locking and backward disengagement, which can not only ensure the reliability of power transmission during the advancement of the suture needle, but also avoid the retraction of the suture needle 220 during the return stroke, significantly improving the smoothness and controllability of the suture action.

[0050] To further enhance operational convenience and assembly accuracy, the drive unit 100 and the actuator 200 are each equipped with corresponding alignment marks. For example, color markings, engravings, raised or recessed marks, or graphic symbols are provided on the outer surfaces of the sleeve 110 and the needle holder 210. When the two parts are correctly aligned and rotated to the predetermined position, the alignment marks align, indicating to the user that correct alignment has been achieved. This design helps reduce the risk of misassembly during clinical operations, and is particularly suitable for applications requiring rapid replacement of the actuator 200 in emergency or complex environments. See also Figure 16 When using the device, the tissue 400 to be sutured can be grasped with medical forceps and pulled into the working space of the suture needle 220 for suturing. The suturing method using medical forceps allows for precise positioning of the tissue 400. The forceps can also be used to grasp and pull the tissue 400 to adjust the suture depth or the height of gastrointestinal folds. When advancing the suture device, the tissue 400 can be inserted into the working space of the C-shaped opening of the suture needle 220, eliminating the need for additional medical forceps and achieving suturing of the tissue 400 with higher efficiency.

[0051] In summary, the suture device provided by this invention, by separating the drive unit 100 and the execution unit 200 and combining them with a precise mechanical connection and transmission structure, achieves convenient disassembly and reusability of the execution unit 200, effectively alleviating the high cost problem caused by the overall disposal of traditional integrated suture devices. Simultaneously, through the integration of multiple technical means such as alignment structure, double limiting, and unidirectional transmission, the connection reliability and operational consistency of the device are ensured under repeated disassembly and assembly conditions, demonstrating good clinical application prospects and industrialization value.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stapler characterized by, The device comprises a driving part (100) and an executing part (200), the driving part (100) is used for connecting an endoscope, and the executing part (200) is detachably connected with the driving part (100).

2. The stapler of claim 1, wherein, The executing part (200) comprises a needle rack (210) and a suture needle (220), and the suture needle (220) is movably connected with the needle rack (210). The needle rack (210) is detachably connected with the driving part (100), and when the needle rack (210) is connected with the driving part (100), the suture needle (220) is connected with the driving part (100) to establish a transmission connection.

3. The stapler according to claim 2, wherein, The needle rack (210) is configured as a visual structure.

4. The stapler of claim 1, wherein, The executing part (200) is axially butted or separated with the driving part (100), and is coupled or decoupled by relative rotation.

5. The stapler according to claim 1, wherein, The driving part (100) comprises a sleeve (110), and the sleeve (110) is connected with the executing part (200) by screw thread or buckle.

6. The stapler according to claim 5, wherein, The sleeve (110) is provided with at least one limiting block (111), the limiting block (111) is matched with the executing part (200), and the rotation of the executing part (200) relative to the sleeve (110) around the axis of the sleeve (110) is limited.

7. The stapler according to claim 6, wherein, The executing part (200) is provided with a limiting groove (213) and a limiting barrier (214), and the limiting groove (213) and the limiting barrier (214) are sequentially and circumferentially spaced apart. When the sleeve (110) is installed in place by screw thread cooperation with the executing part (200), at least one limiting block (111) is matched in the limiting groove (213) by crossing the limiting barrier (214).

8. The stapler according to claim 6, wherein, The executing part (200) is provided with an insertion slot (211) extending in the axial direction, and a clamping groove (212) extending circumferentially along the executing part (200) and communicating with the insertion slot (211). The insertion slot (211) and the clamping groove (212) are matched with the limiting block (111).

9. The stapler according to claim 8, wherein, The executing part (200) is provided with a limiting groove (213) and a limiting barrier (214), and the limiting groove (213), the limiting barrier (214) and the clamping groove (212) are sequentially and circumferentially spaced apart. When the executing part (200) is installed, the limiting block (111) is inserted along the insertion slot (211), and the limiting block (111) is slid along the clamping groove (212) and matched in the limiting groove (213) by crossing the limiting barrier (214) by rotating the executing part (200) relative to the sleeve (110).

10. The stapler according to claim 5, wherein, The sleeve (110) is connected with a support (120), and the support (120) is connected with the distal end of the endoscope.

11. The stapler according to claim 5, wherein, The sleeve (110) is provided with a limiting strip (112). The executing part (200) is provided with a positioning groove (215) corresponding to the limiting strip (112), and a side insertion slot (216) communicating with the positioning groove (215) and extending circumferentially along the executing part (200). When the execution part (200) is installed, the limiting strip (112) is inserted from the alignment groove (215), and the limiting strip (112) is slidingly fitted in the side insertion groove (216) by rotating the execution part (200) relative to the sleeve body (110).

12. The stapler according to claim 2, wherein, The driving part (100) is provided with a transmission member (130) corresponding to the suture needle (220) and a driving member (140) drivingly connected with the transmission member (130). In the state that the execution part (200) is connected with the driving part (100), the transmission member (130) and the suture needle (220) are drivingly connected.

13. The stapler according to claim 12, wherein, The driving member (140) comprises a gear, and the transmission member (130) comprises a gear ring drivingly engaged with the gear.

14. The stapler according to claim 12, wherein, The transmission member (130) is connected with an elastic column (150). The suture needle (220) is provided with a clamping site (221) matched with the elastic column (150), one end of the clamping site (221) is provided with a one-way limiting part (222), and the other end is provided with a lead-out slope (223). When the transmission member (130) rotates in a first direction, the elastic column (150) is fitted in the clamping site (221) and abuts against the one-way limiting part (222), so as to drive the tip of the suture needle (220) to move in the first direction. When the transmission member (130) rotates in a second direction opposite to the first direction, the elastic column (150) is separated from the clamping site (221) along the lead-out slope (223).

15. The stapler according to claim 2, wherein, The suture needle (220) is connected with a suture line, the suture line comprises a degradable segment and a non-degradable segment, one end of the degradable segment is connected with the suture needle (220), and the other end of the degradable segment is connected with the non-degradable segment. The length of the degradable segment is greater than or equal to 10 mm.

16. The stapler according to any one of claims 1 to 15, wherein, The driving part (100) and the execution part (200) are provided with corresponding alignment marks.

Images