Suture cutting instrument, treatment apparatus, and operation method therefor

Abstract

Provided in the embodiments of the present specification are a suture cutting instrument, a treatment apparatus, and an operation method therefor. The suture cutting instrument comprises a conveying portion and a suture cutting portion. The conveying portion comprises a conveying tube and a control wire. The suture cutting portion comprises an outer tube and an inner tube, and the inner tube is arranged inside the outer tube. The suture cutting portion is releasably connected to the conveying portion. The inner tube can slide relative to the outer tube along the axial direction of the outer tube under the action of the control wire, and a tube wall of the inner tube is provided with a suture cutting hole. When the inner tube is in a first position relative to the outer tube, a suture can pass through the suture cutting hole; when the inner tube is in a second position relative to the outer tube, the suture is fixed by the suture cutting portion. The treatment apparatus comprises a suture, a first clip instrument, a second clip instrument, and the suture cutting instrument.

Description

A suture cutting instrument, a treatment device, and its operating method Technical Field

[0001] This manual relates to the field of medical devices, and in particular to a suture cutting instrument, a treatment device, and its operating method. Background Technology

[0002] For large tissue bleeding and perforation, i.e., large wounds, multiple hemostatic clips and suture-cutting instruments are usually used for wound suturing.

[0003] For large perforated or bleeding wounds, multiple sutures are usually used for suturing. Suture cutting instruments are not easy to cut or fix, and the cutting and fixing of sutures usually need to be done in steps, making the suturing process very complicated.

[0004] Therefore, there is a need to provide a suture cutting instrument, a treatment device, and a method of operation thereof that can easily cut and fix sutures. Summary of the Invention

[0005] This specification provides one or more embodiments of a thread-cutting device, comprising: a conveying unit including a conveying tube and a control wire; and a thread-cutting unit including an outer tube and an inner tube, the inner tube being disposed inside the outer tube, the thread-cutting unit being releasably connected to the conveying unit, the inner tube being able to slide relative to the outer tube along the axial direction of the outer tube under the action of the control wire, and a thread-cutting hole being provided on the wall of the inner tube; wherein, when the inner tube is in a first position relative to the outer tube, the suture can pass through the thread-cutting hole; and when the inner tube is in a second position relative to the outer tube, the suture is fixed by the thread-cutting unit.

[0006] This specification provides one or more embodiments of a treatment device, comprising: a suture; a first clamping device including a releasably connected first clamp delivery portion and a first clamping portion, the first clamping portion including a suture fixing structure; one or more second clamping devices including a releasably connected second clamp delivery portion and a second clamping portion, the second clamping portion including at least one suture hole in which the suture is slidable; and a suture cutting device as described above.

[0007] This specification provides one or more embodiments of a method for operating a treatment device, applied to the treatment device; the treatment device includes: a suture; a first clamping device including a releasably connected first clamping delivery portion and a first clamping portion, the first clamping portion including a suture fixing structure; one or more second clamping devices including a releasably connected second clamping delivery portion and a second clamping portion, the second clamping portion including at least one suture hole, the suture being slidable in the at least one suture hole; and a suture cutting device as described above; the operating method includes: clamping the first clamping device with the suture fixed thereon onto a first... The first clamp conveying part and the first clamping part are released at the target position; after the suture is passed through the at least one thread hole of one or more second clamping devices, the one or more second clamping devices are clamped at one or more second target positions, and the second clamp conveying part and the second clamping part are released; the suture is pulled to bring the first clamping part and one or more second clamping parts together; after the suture is passed through the fixing hole and the cutting hole of the thread cutting device, the thread cutting device is moved to the third target position to fix the gathered first clamping part and the second clamping part. Attached Figure Description

[0008] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0009] Figure 1 is an exemplary cross-sectional view of a wire-cutting device according to some embodiments of this specification;

[0010] Figure 2 is an exemplary cross-sectional view of a suture-cutting device after suture insertion, according to some embodiments of this specification;

[0011] Figure 3 is a schematic diagram of the wire-cutting section according to some embodiments of this specification;

[0012] Figure 4 is a structural schematic diagram of the wire-cutting portion from another perspective, according to some embodiments of this specification;

[0013] Figure 5 is a structural schematic diagram of the wire-cutting portion from another perspective, according to some embodiments of this specification.

[0014] Figure 6 is a schematic diagram of the suture guide according to some embodiments of this specification;

[0015] Figure 7 is a structural schematic diagram of the suture guide shown from another perspective according to some embodiments of this specification;

[0016] Figure 8 is a three-dimensional structural schematic diagram of the suture guide shown in some embodiments according to this specification;

[0017] Figure 9 is a perspective view of the suture guide portion shown in some embodiments according to this specification.

[0018] Figure 10 is a schematic diagram of the structure of the limiting and fitting part according to some embodiments of this specification;

[0019] Figure 11 is a structural schematic diagram of the limiting and fitting part from another perspective, according to some embodiments of this specification;

[0020] Figure 12 is a schematic diagram of the connection and release of the delivery pipe and the outer pipe according to some embodiments of this specification;

[0021] Figure 13 is a schematic diagram showing the engagement of the thread-cutting part with the sewing thread according to some embodiments of this specification;

[0022] Figure 14 is a schematic diagram from another perspective showing the engagement of the thread-cutting section with the sewing thread according to some embodiments of this specification;

[0023] Figure 15 is a schematic diagram of cutting and securing the suture according to some embodiments of this specification;

[0024] Figure 16 is a schematic diagram showing the connection and release of the delivery pipe and the outer pipe according to some embodiments of this specification;

[0025] Figure 17 is a schematic diagram of a treatment device according to some embodiments of this specification;

[0026] Figure 18 is an exemplary structural diagram of a treatment device according to some embodiments of this specification;

[0027] Figure 19 is another exemplary structural diagram of a treatment device according to some embodiments of this specification;

[0028] Figure 20 is yet another exemplary structural diagram of a treatment device according to some embodiments of this specification;

[0029] Figure 21 is a schematic diagram of the operation method according to some embodiments of this specification;

[0030] Figure 22 is a schematic diagram of the operation method according to some embodiments of this specification;

[0031] Figure 23 is a schematic diagram of the operation method shown in some embodiments of this specification. Detailed Implementation

[0032] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0033] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0034] Figure 1 is an exemplary cross-sectional view of a suture-cutting instrument according to some embodiments of this specification; Figure 2 is an exemplary cross-sectional view of a suture-cutting instrument after suture insertion according to some embodiments of this specification. The proximal end is the end closer to the doctor or operator, and the distal end is the end farther from the doctor or operator.

[0035] This specification provides a thread-cutting device according to some embodiments. In some embodiments, as shown in Figures 1 and 2, the thread-cutting device includes a conveying section and a thread-cutting section. The conveying section includes a conveying tube 220 and a control wire 230. The thread-cutting section includes an outer tube 510 and an inner tube 520, with the inner tube 520 disposed inside the outer tube 510. The thread-cutting section is releasably connected to the conveying section. Under the action of the control wire 230, the inner tube 520 can slide relative to the outer tube 510 along the axial direction. A thread-cutting hole 522 is provided on the wall of the inner tube 520. When the inner tube 520 is in a first position relative to the outer tube 510, the suture 600 can pass through the thread-cutting hole 522. When the inner tube 520 is in a second position relative to the outer tube 510, the suture 600 is fixed by the thread-cutting section.

[0036] The delivery unit is used to insert medical devices such as hemostatic clips and suture clamps into the patient's body at the location where a corresponding medical procedure needs to be performed. In some embodiments, the delivery unit may include a delivery tube 220 and a control wire 230. The delivery unit may also include other structures, such as a device for providing delivery power.

[0037] The delivery tube 220 has a hollow tubular structure. In some embodiments, it can be a tubular structure with a smooth outer surface to facilitate delivery and reduce harm to the patient. In some embodiments, the delivery tube 220 can be a flexible and elastic tubular structure to easily adapt to the delivery path. In some embodiments, the delivery tube 220 can be made of a chemically stable and non-biotoxic flexible material, such as polyvinyl chloride, polyethylene, polypropylene, etc.

[0038] The control wire 230 is used to connect with other medical devices such as hemostatic clips and suture clamps to control the delivery process. In some embodiments, the control wire 230 may be disposed within the delivery tube 220. The control wire 230 may be a flexible and elastic filamentous structure, while also possessing sufficient strength and torque to adapt to the delivery path and control the delivery process. The control wire 230 may be made of a metallic material, such as stainless steel.

[0039] The suture cutting section is used to cut and secure the suture 600. Suture 600 refers to the suture material used in surgical procedures for ligation and suturing to stop bleeding and for tissue closure.

[0040] Figure 3 is a structural schematic diagram of the wire-cutting section according to some embodiments of this specification; Figure 4 is a structural schematic diagram of the wire-cutting section according to some embodiments of this specification from another perspective; Figure 5 is a structural schematic diagram of the wire-cutting section according to yet another perspective of some embodiments of this specification.

[0041] In some embodiments, as shown in Figures 1 and 3-5, the wire-cutting section includes an outer tube 510 and an inner tube 520. Both the outer tube 510 and the inner tube 520 can be hollow tubular structures and can be made of a material similar to that of the conveying tube 220. In some embodiments, the inner tube 520 is disposed inside the outer tube 510 and is movable relative to the outer tube 510.

[0042] In some embodiments, the wire-cutting section and the conveying section are releasable. A releasable connection means that it can be in either a connected or disconnected state. For more information on releasable connections, please refer to Figures 10-12 and related descriptions.

[0043] In some embodiments, the releasable connection between the wire cutting section and the conveying section may include: an outer tube 510 releasably connected to the conveying section, and an inner tube 520 releasably connected to the control wire 230. The inner tube 520 can slide relative to the outer tube 510 along the axial direction of the outer tube 510 under the action of the control wire 230. The axial direction of the outer tube 510 is along the X direction in FIG3.

[0044] In some embodiments, the inner tube 520 has a wire-cutting hole 522 on its wall.

[0045] In some embodiments, when the inner tube 520 is in a first position relative to the outer tube 510 (see FIG. 2), the suture 600 can pass through the suture cutting hole 522; when the inner tube 520 is in a second position relative to the outer tube 510 (see FIG. 10), the suture 600 is fixed by the suture cutting part. The first position and the second position refer to different positions of the inner tube 520 relative to the outer tube 510, respectively.

[0046] In the first position, the suture hole 522 is exposed relative to the outer tube 510, thus allowing the suture 600 to pass through it. In some embodiments, the suture cutting device has a suture exit portion 512. When the suture hole 522 is aligned with the suture exit portion 512, the inner tube 520 is considered to be in the first position relative to the outer tube 510, and the suture 600 passes through both the suture hole 522 and the suture exit portion 512. Further explanation of the suture exit portion 512 is provided below. In some embodiments, the suture cutting device may not have the suture exit portion 512. When the inner tube 520 extends distally relative to the outer tube 510, exposing the suture hole 522, the inner tube 520 is considered to be in the first position relative to the outer tube 510, and the suture 600 passes through the suture hole 522.

[0047] In the second position, the suture cutting hole 522 is at least partially or completely covered by the outer tube 510, the suture 600 is cut by the suture hole 522, and the suture 600 can be fixed by the suture cutting part. In some embodiments, the suture cutting instrument has a fixing hole 521 and a suture guide 511. When the fixing hole 521 moves proximally and continues proximally past the position of the suture guide 511 to an area inside the outer tube 510 not covered by the suture guide 511, the inner tube 520 is considered to be in the second position relative to the outer tube 510, and the suture 600 is fixed by the suture cutting part. In some embodiments, the suture cutting instrument does not have a suture guide 511. When the fixing hole 521 moves proximally to partially or completely within the outer tube 510, the inner tube 520 is considered to be in the second position relative to the outer tube 510, and the suture 600 is fixed by the suture cutting part.

[0048] In some embodiments, as shown in FIG2, the thread-cutting portion further includes a thread-fixing portion 523. The thread-fixing portion 523 is used to fix the thread 600. The thread-fixing portion 523 includes a first portion 5231 and a second portion 5232. The first portion 5231 is located on the outer wall of the inner tube 520, and the second portion 5232 is located on the inner wall of the outer tube 510. A first gap exists between the first portion 5231 and the second portion 5232. When the inner tube 520 is in a second position relative to the outer tube 510, the thread 600 is located within the first gap, and the thread 600 is clamped by the inner tube 520 and the outer tube 510.

[0049] In some embodiments, the inner tube 520 has a fixing hole 521 on its wall. The first part 5231 can be formed by a groove extending distally from the fixing hole 521 on the outer wall of the inner tube 520, and the second part 5232 can be a smooth inner wall of the outer tube 510 without a groove. In some embodiments, the second part 5232 can be formed by a groove extending distally from the inner wall of the outer tube 510, and the first part 5231 can be a smooth outer wall of the inner tube 520 without a groove. In some embodiments, the first part 5231 can be formed by a groove extending distally from the fixing hole 521 on the outer wall of the inner tube 520, and the second part 5232 can be formed by a groove extending distally from the inner wall of the outer tube 510. Due to the presence of the groove, a first gap is formed between the first part 5231 and the second part 5232, which facilitates the fixing of the suture 600 by clamping it in the first gap and fixing it without cutting it.

[0050] In some embodiments, the fixing hole 521 and the thread-cutting hole 522 are located at the same position along the axial direction of the inner tube 520 to ensure that the suture 600 can pass through the fixing hole 521 and exit through the thread-cutting hole 522. The axial direction of the inner tube 520 is along the X direction in Figure 3.

[0051] In some embodiments, the positions of the fixing hole 521 and the thread cutting hole 522 along the axial direction of the inner tube 520 may not be exactly the same, that is, they may have a certain deviation. As long as the thread 600 can be smoothly inserted into the fixing hole 521 and out of the thread cutting hole 522, it is acceptable.

[0052] In some embodiments, the fixing hole 521 and the thread-cutting hole 522 are arranged opposite to each other. That is, the fixing hole 521 and the thread-cutting hole 522 are positioned opposite each other on both sides of the inner tube 520. For example, the inner tube 520 is a hollow cylinder with a circular cross-section, and the fixing hole 521 and the thread-cutting hole 522 are distributed at both ends of the same diameter of the same circle. The opposite arrangement of the fixing hole 521 and the thread-cutting hole 522 can further ensure that the suture 600 passes through smoothly.

[0053] In some embodiments, as shown in FIG2, the thread-cutting hole 522 is fitted with the outer tube 510. In some embodiments, a second gap exists between the outer wall of the inner tube 520 and the inner wall of the outer tube 510 at the position corresponding to the thread-cutting hole 522. The width H2 of the second gap is less than half the diameter D of the suture 600. Referring to FIG2, the width H2 of the second gap refers to the radial width of the second gap along the outer tube 510. It can be understood that the width H2 of the second gap is much smaller than half the diameter D, and after the suture 600 enters the suture fixing part 523, the inner tube 520 will be squeezed towards the thread-cutting hole 522, thereby further reducing the width H2 of the second gap, thus ensuring that the suture 600 can be cut at the thread-cutting hole 522.

[0054] In some embodiments, the inner tube 520 includes a first tube segment A and a second tube segment B. The first tube segment A is located at the distal end of the fixing hole 521, and the second tube segment B is located at the proximal end of the fixing hole 521. The projections of the first tube segment A and the second tube segment B along the axial direction of the inner tube 520 can be eccentrically arranged, and the projections of the first tube segment A and the second tube segment B along the axial direction of the inner tube 520 coincide at the position of the wire cutting hole 522. Referring to Figure 2, the first tube segment A has a first gap on one side of the fixing hole 521. At this time, the boundaries of the first tube segment A and the second tube segment B on one side of the fixing hole 521 do not completely coincide, that is, the first tube segment and the second tube segment are eccentrically arranged; the boundary of the first tube segment A on one side of the wire cutting hole 522 coincides with the boundary of the second tube segment B at the position of the wire cutting hole 522.

[0055] In some embodiments, the first tube segment A and the second tube segment B are eccentrically arranged so that after the suture 600 enters the suture fixing part 523, the inner tube 520 is squeezed toward the side where the suture cutting hole 522 is located, further reducing the width H2 of the second gap between the inner tube 520 and the outer tube 510 at the suture cutting hole 522, thereby ensuring that the suture 600 can be cut at the suture cutting hole 522.

[0056] In some embodiments, the first gap, with a radial width H1 along the outer tube 510, is greater than one-third of the diameter D of the suture 600 and less than the diameter D of the suture 600. This ensures that while the suture 600 is clamped in the first gap, the outer tube 510, the suture 600, and the suture fixing part 523 form an interference fit to fix the suture 600 and prevent it from coming out. At the same time, the suture 600 will not be cut at the fixing hole 521. It can be understood that with this configuration, the suture 600 is fixed in the cutting part at the same time it is cut by the cutting part.

[0057] In some embodiments, the gap width H1 is 0.06mm-0.25mm. In some embodiments, the gap width H1 is 0.07mm-0.20mm. In some embodiments, the gap width H1 is 0.08mm-0.20mm. In some embodiments, the gap width H1 is 0.10mm-0.18mm. In some embodiments, the gap width H1 is 0.10mm-0.15mm.

[0058] Figure 6 is a structural schematic diagram of a suture guide according to some embodiments of this specification; Figure 7 is a structural schematic diagram of a suture guide according to some embodiments of this specification from another perspective; Figure 8 is a three-dimensional structural schematic diagram of a suture guide according to some embodiments of this specification; Figure 9 is a three-dimensional structural schematic diagram of a suture guide according to some embodiments of this specification from another perspective.

[0059] In some embodiments, as shown in Figures 6-9, the outer tube 510 is provided with a suture guide 511 for guiding the suture 600 through the fixing hole 521. The suture guide 511 and the suture fixing part 523 are arranged opposite to each other along the periphery of the outer tube 510.

[0060] In some embodiments, the suture guide 511 can be a U-shaped opening groove that extends from the proximal end to the distal end on the outer tube 510. The U-shaped opening groove can be aligned with the fixing hole 521, so that the suture 600 can pass through the suture guide 511 and then through the fixing hole 521.

[0061] It is understandable that the suture guide 511 may not be provided. In this case, part of the inner tube 520 extends beyond the far end of the outer tube 510, and the fixing hole 521 on the inner tube 520 is exposed, so that the suture 600 can be inserted.

[0062] In some embodiments, the outer tube 510 is provided with an insertion part marking 514, which is used to indicate the position of the suture guide part 511 and help distinguish the insertion and exit positions of the suture 600.

[0063] In some embodiments, the insertion mark 514 may be a different color from the outer tube 510 or be recessed or raised relative to the outer tube 510 to serve as an indicator. For example, the insertion mark 514 may be a dark arrow pointing to the stitch guide 511. The insertion mark 514 may also be other colors or shapes.

[0064] In some embodiments, a thread exit portion 512 is provided on the outer tube 510 at a position corresponding to the thread cutting hole 522. The thread exit portion 512 can be a rectangular groove and is aligned with the thread cutting hole 522, so that the thread 600 can pass through the thread cutting hole 522 and then exit through the thread exit portion 512.

[0065] Understandably, the suture guide 511 needs to exist simultaneously with the suture exit 512, and they need to be aligned with the fixing hole 521 and the cutting hole 522 respectively. If the suture guide 511 or the suture exit 512 does not exist, then part of the inner tube 520 needs to extend beyond the far end of the outer tube 510, exposing the fixing hole 521 and the cutting hole 522 so that the suture 600 can pass through.

[0066] In some embodiments, referring to Figures 2, 8, and 9, the outer tube 510 is provided with a limiting portion 513, and the inner tube 520 is provided with a limiting mating portion 524. The limiting portion 513 and the limiting mating portion 524 have a mating state and a disengaged state. In some embodiments, the limiting portion 513 can be a protruding structure, and the limiting mating portion 524 can be a groove structure. The limiting portion 513 can be inserted into the limiting mating portion 524 to achieve mating, and the limiting portion 513 can also be withdrawn from the limiting mating portion 524 to disengage. The limiting portion 513 and the limiting mating portion 524 can also be other feasible structures that can be mated and connected.

[0067] Figure 10 is a structural schematic diagram of the limiting fit portion according to some embodiments of this specification; Figure 11 is a structural schematic diagram of the limiting fit portion from another perspective according to some embodiments of this specification.

[0068] In some embodiments, referring to Figures 1 and 2, in the mating state, the limiting portion 513 restricts the movement of the inner tube 520 relative to the outer tube 510 toward the proximal end. At this time, the limiting portion 513 inserts into the limiting mating portion 524, preventing the inner tube 520 from undergoing axial displacement and moving out of the outer tube 510.

[0069] Referring to Figures 10 and 11, in the released state, the inner tube 520 can slide relative to the outer tube 510 along the axial direction. Under the action of the control wire 230, the inner tube controls the limiting part 513 and the limiting engagement part 524 to change from the engaged state to the released state. At this time, the limiting part 513 disengages from the limiting engagement part 524, allowing the inner tube 520 to move axially relative to the outer tube 510, causing the thread 600 at the thread cutting hole 522 to be cut by the thread cutting hole 522 and the thread exit part 512 under the action of force.

[0070] In some embodiments, as shown in Figures 1 and 2, the limiting portion 513 may include an elastic sheet, and the limiting mating portion 524 may include a locking hole. When the elastic sheet is partially located in the locking hole, it is in a mating state. At this time, the hook-shaped elastic sheet at the front end of the limiting portion 513 hooks into the locking hole, thereby restricting the movement of the inner tube 520 relative to the outer tube 510 towards the proximal end. In some embodiments, under the action of the control wire 230, the elastic sheet deforms and completely exits the locking hole, thereby changing the mating state to a released state. At this time, the hook-shaped elastic sheet at the front end of the limiting portion 513 deforms and disengages from the locking hole, thereby releasing the movement restriction, and the inner tube 520 can slide relative to the outer tube 510 along the axial direction of the outer tube 510.

[0071] In some embodiments, the inner tube 520 includes a pin 540, and the distal end of the control wire 230 includes a connecting piece 550, which includes a hook 551. In some embodiments, the hook 551 can hook the pin 540 to engage with it. When the hook 551 engages with the pin 540, the inner tube 520 is connected to the control wire 230 and can be controlled by the control wire 230, moving with the movement of the control wire 230; when the engagement between the hook 551 and the pin 540 is released, the connection between the inner tube 520 and the control wire 230 is released, and the inner tube 520 is no longer controlled by the control wire 230. In some embodiments, the pin 540 can be inserted into a matching pin hole 525.

[0072] By setting the control wire 230 to be releasably connected to the inner tube 520, pulling the control wire 230 can drive the axial movement of the inner tube 520, so that the thread 600 at the thread cutting hole 522 is cut by the thread protrusion part 512 under the action of force.

[0073] In some embodiments, as shown in FIG11, when the hook 551 is deformed or broken, the engagement between the hook 551 and the pin 540 is released, the inner tube 520 is disconnected from the control wire 230, and the inner tube 520 is no longer controlled by the control wire 230.

[0074] In some embodiments, the proximal end of the outer tube 510 includes a blocking portion 531. In some embodiments, the blocking portion 531 is capable of preventing the inner tube 520 from moving proximally relative to the outer tube 510 along its axial direction. The blocking portion 531 can block the movement of the inner tube 520 by abutting against it. After the inner tube 520 is blocked by the blocking portion 531, the control wire 230 continues to be pulled proximally, causing the hook 551 to deform or break, thereby disengaging the hook 551 from the pin 540.

[0075] Figure 12 is a schematic diagram of the connection and release of the delivery pipe and the outer pipe according to some embodiments of this specification.

[0076] In some embodiments, as shown in FIG12, the delivery pipe 220 includes a connector 240, the connector 240 includes a hook 241, and the outer pipe 510 includes a connecting hole 532. In some embodiments, when the hook 241 engages with the connecting hole 532, the delivery pipe 220 is connected to the outer pipe 510. In some embodiments, after the connecting piece 550 disengages from the pin, as it continues to move towards the proximal end, because the distal end of the connecting piece 550 is thicker, it will drive the connector 240 to move towards the proximal end as well, thereby deforming the hook 241 and disengaging it from the connecting hole 532; when the hook 241 disengages from the connecting hole 532, the connection between the delivery pipe 220 and the outer pipe 510 is released, and the wire cutting part is no longer connected to the delivery pipe 220.

[0077] In some embodiments, the wire-cutting device further includes a tail tube 530. The tail tube 530 may be part of the outer tube 510 or connected to the outer tube 510. Example connection methods include welding, bonding, snap-fit ​​connection, pin connection, etc. In some embodiments, the tail tube 530 may be connected inside the outer tube 510, and one end of the tail tube 530 may form a blocking portion 531 that abuts against the inner tube 520 to prevent the movement of the inner tube 520.

[0078] Figure 13 is a schematic diagram of the thread-cutting part cooperating with the sewing thread according to some embodiments of this specification; Figure 14 is a schematic diagram of the thread-cutting part cooperating with the sewing thread according to some embodiments of this specification from another perspective; Figure 15 is a schematic diagram of cutting and fixing the sewing thread according to some embodiments of this specification; Figure 16 is a schematic diagram of the connection and release of the delivery tube and the outer tube according to some embodiments of this specification.

[0079] In some embodiments, as shown in Figures 13-16, the inner tube 520 also has a first hole 210 on its wall, which is located within the first part 5231. Referring to Figure 13, the fixing hole 521 and the first hole 210 can be located on the same side of the thread fixing part 523 and opposite to the thread cutting hole 522. By providing the first hole 210, the thread 600 is bent to a more extreme angle and fixed in the fixing hole 521 and the first hole 210, increasing the reliability of the thread 600's fixation.

[0080] In some embodiments, the outer tube 510 is provided with a cutting edge 514, which can be a sharp edge formed by the gradual reduction of the wall thickness of the outer tube 510. The cutting edge 514 is located near the cutting hole 522 to enhance the cutting effect and make it easier to cut the sewing thread 600 during the cutting operation.

[0081] In some embodiments, the distance between the first hole 210 and the fixing hole 521 is greater than the diameter D of the suture 600, so that the suture 600 can pass through the first hole 210 and the fixing hole 521 at the same time, and can fit against the wall of the inner tube 520 between the two holes.

[0082] In some embodiments, the first gap has a radial width H1 along the outer tube 510 that is greater than or equal to one-third of the diameter D of the suture 600 and less than or equal to the diameter D of the suture 600, so that the first gap can hold the suture 600 without causing the suture 600 to break or be damaged.

[0083] Figure 17 is a schematic diagram of a treatment device according to some embodiments of this specification; Figure 18 is an exemplary structural diagram of a treatment device according to some embodiments of this specification; Figure 19 is another exemplary structural diagram of a treatment device according to some embodiments of this specification; Figure 20 is yet another exemplary structural diagram of a treatment device according to some embodiments of this specification.

[0084] This specification provides a treatment device according to some embodiments. As shown in FIG17, the treatment device includes a suture 600, a first clamping device 300, one or more second clamping devices 400, and a suture cutting device 500 as described in the foregoing embodiments.

[0085] The first clamping instrument 300 and the second clamping instrument 400 are used to clamp tissue, thereby achieving the purpose of closing tissue gaps. They can be used for hemostasis in surgical procedures, as well as for closing gaps in cavities such as the gastrointestinal tract in endoscopic procedures.

[0086] In some embodiments, the first clamping device 300 includes a releasably connected first clamp delivery part 3100 and a first clamping part 3200, the first clamping part 3200 including a suture fixing structure.

[0087] In some embodiments, the second clamping device 400 includes a releasably connected second clamp delivery portion 4100 and a second clamping portion 4200, the second clamping portion 4200 including at least one thread hole, in which the suture 600 is slidable.

[0088] The clamping part is used to tightly engage two or more clamping bodies (such as clamping plates) made of hard, high-strength materials under a certain axial force, thereby achieving the purpose of clamping tissue.

[0089] In some embodiments, as shown in Figures 18 and 19, the suture fixing structure is a suture hole 311, and the suture 600 is tied and fixed in the suture hole 311.

[0090] In some embodiments, the first clamping portion 3200 includes a first clamping piece 310 disposed at the distal end of the first clamping portion 3200. The distal end of the first clamping piece 310 is provided with a suture fixing structure, namely a suture hole 311, on which the suture 600 is attached. The first clamping piece 310 may be two pieces, which can be gathered together and stored in the tightening tube 320.

[0091] For example, in use, the first clamping part 3200 is inserted into the human body through a flexible endoscope. The suture 600 is tied to the suture hole 311 and enters the human body together with the first clamping part 3200. At the same time, the operator holds the other end of the suture 600 from outside the body. After the first clamping part 3200 reaches the wound surface, the operator pulls the sliding handle 110 (see Figure 17) to release the first clamping part 3200 at the edge of the wound surface. At this time, the first clamping piece 310 of the first clamping part 3200 and the suture 600 remain in the human body.

[0092] In some embodiments, the ratio of the distance L1 between the suture fixing structure and the distal end of the first clamping portion 3200 to the length L of the first clip 310 is 1 / 5 to 1 / 2. In some embodiments, the ratio of the distance L1 between the suture fixing structure and the distal end of the first clamping portion 3200 to the length L of the first clip 310 is 1 / 4 to 1 / 3. In some embodiments, the ratio of the distance L1 between the suture fixing structure and the distal end of the first clamping portion 3200 to the length L of the first clip 310 is 1 / 4.

[0093] The suture fixation structure needs to be relatively close to the human tissue to facilitate control of the tissue position during ligation.

[0094] In some embodiments, a suture hole 311 is disposed on the first clip 310, and the diameter of the suture hole 311 is greater than the diameter of the suture 600 and less than three-quarters of the width H of the first clip 310.

[0095] In some embodiments, the suture 600 can be fixed to a suture fixing structure. For example, the suture 600 can be fixed to the suture hole 311 by adhesive, which has high efficiency and convenience.

[0096] In some embodiments, as shown in FIG20, the second clamping portion 4200 includes a second clamping piece 410 disposed at the distal end of the second clamping portion 4200. The second clamping portion 4200 also includes a fixing pin 412 and a receiving tube 420. The second clamping piece 410 may be two pieces that can be brought together and stored in the receiving tube 420.

[0097] For example, in use, after the suture 600, which is outside the human body, is passed through the suture hole 411 outside the body, the second clamping part 4200 is inserted into the human body through a flexible endoscope and reaches the center of the wound. After the second clamping piece 410 is opened to clamp an appropriate amount of tissue, the sliding handle 110 is pulled (see Figure 17), and the second clamping piece 410 closes. At this time, the fixing needle 412 passes through the tissue and completely fixes the tissue in the position of the second clamping part 4200. The sliding handle 110 is pulled until the second clamping part 4200 is released. The above steps are repeated to insert the suture 600 outside the body through the suture hole 411 and into the body. At the other end of the wound relative to the position of the first clamping part 3200, the tissue is clamped and released.

[0098] In some embodiments, the ratio of the distance L2 between the wire passage hole 411 and the distal end of the second clamping portion 4200 to the length of the second clamping piece 410 is 0.4-0.6. In some embodiments, the ratio of the distance L2 between the wire passage hole 411 and the distal end of the second clamping portion 4200 to the length of the second clamping piece 410 is 0.45-0.55. In some embodiments, the ratio of the distance L2 between the wire passage hole 411 and the distal end of the second clamping portion 4200 to the length of the second clamping piece 410 is 0.5.

[0099] By setting the wire hole 411 to the middle position of the second clamping piece, it is beneficial to the stability of the second clamping part 4200 after binding.

[0100] In some embodiments, a thread hole 411 is provided on the second clip 410, and the diameter of the thread hole 411 is greater than the diameter of the sewing thread 600 and less than three-quarters of the width of the second clip 410.

[0101] In some embodiments, the suture 600 includes a threading aid 610 and a thread body, the threading aid 610 being located at the distal end of the thread body and fixedly connected to it. Example connection methods include adhesive bonding, snap-fitting, and binding.

[0102] For softer sutures 600, it is difficult to pass through the suture guide 511 and exit through the suture exit 512. Therefore, providing a threading aid 610 at the distal end of the suture body facilitates the suture 600's entry through the suture guide 511 and exit through the suture exit 512. In some embodiments, the threading aid 610 can be a hollow mandrel, with an inner diameter larger than the diameter of the suture 600 and an outer diameter smaller than the width of the suture guide 511. For example, the threading aid 610 is approximately 1 cm long.

[0103] Figure 21 is a schematic diagram of the operation method according to some embodiments of this specification; Figure 22 is a schematic diagram of the operation method according to some embodiments of this specification; Figure 23 is a schematic diagram of the operation method according to some embodiments of this specification.

[0104] This specification provides a method of operating a treatment device according to some embodiments, which is applied to the treatment device of the aforementioned embodiments. The treatment device includes a suture 600, a first clamping device 300, one or more second clamping devices 400, and a suture-cutting device 500 as described in the aforementioned embodiments. The first clamping device 300 includes a releasably connected first clamp delivery portion 3100 and a first clamping portion 3200, the first clamping portion 3200 including a suture fixing structure. The second clamping device 400 includes a releasably connected second clamp delivery portion 4100 and a second clamping portion 4200, the second clamping portion 4200 including at least one suture hole, in which the suture 600 is slidable.

[0105] In some embodiments, referring to Figures 21 and 22, the method of operating the treatment device includes:

[0106] The first clamping device 300 with the fixed suture 600 is clamped at the first target position, and the first clamping delivery part 3100 and the first clamping part 3200 are released;

[0107] After the suture 600 is passed through at least one thread hole 411 of one or more second clamping devices 400 (two second clamping devices 400 as shown in FIG21, namely second clamping device 400-1 and second clamping device 400-2), the one or more second clamping devices 400 are clamped at one or more second target positions, and the second clamping delivery part 4100 and the second clamping part 4200 are released.

[0108] Pulling the sewing thread 600 brings together the first clamping part 3200 and one or more second clamping parts 4200;

[0109] After passing the suture 600 through the fixing hole 521 and the cutting hole 522 of the thread cutting device 500, the thread cutting device 500 is moved to the third target position to fix the gathered first clamping part 3200 and the second clamping part 4200.

[0110] In some embodiments, as shown in FIG23, the operation method of the treatment device further includes: maintaining traction on the suture 600 and moving the suture cutting instrument 500 to a third target position; pulling the control wire 230 of the suture cutting instrument 500 to cut the suture 600, and clamping the cut suture 600 between the suture fixing part 523 and the outer tube 510 of the suture cutting instrument 500; continuing to pull the control wire 230 to release the connection between the inner tube 520 and the control wire 230 of the suture cutting instrument 500; continuing to pull the control wire 230 to release the connection between the outer tube 510 and the delivery tube 220 of the suture cutting instrument 500; and withdrawing the delivery tube 220. Withdrawal means that the delivery tube 220 leaves the human body, while the suture cutting part remains in the human body.

[0111] By sequentially inserting multiple clamping instruments and suture-cutting instruments into the body at appropriate times, and connecting the multiple clamping instruments and suture-cutting instruments with the same suture, after the clamping instruments are inserted and the tissue is clamped, the suture is tightened outside the body to bring the multiple clamping instruments together, so that the wound edges are basically in contact. Then, the suture-cutting instrument is inserted to cut the suture and fix it at the same time. The operation is simple and efficient.

[0112] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0113] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0114] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0115] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A thread-cutting device, characterized in that, include: The conveying unit includes a conveying pipe and a control wire; The wire cutting section includes an outer tube and an inner tube. The inner tube is disposed inside the outer tube. The wire cutting section is releasably connected to the conveying section. Under the action of the control wire, the inner tube can slide relative to the outer tube along the axial direction of the outer tube. The inner tube has a wire cutting hole on its wall. When the inner tube is in a first position relative to the outer tube, the suture can pass through the suture cutting hole; when the inner tube is in a second position relative to the outer tube, the suture is fixed by the suture cutting part.

2. The thread-cutting device as described in claim 1, characterized in that, The outer tube is releasably connected to the conveying section, and the inner tube is releasably connected to the control wire.

3. The thread-cutting device as described in claim 1, characterized in that, The thread-cutting part includes a thread-fixing part, which includes a first part and a second part. The first part is located on the outer wall of the inner tube, and the second part is located on the inner wall of the outer tube. There is a first gap between the first part and the second part. When the inner tube is in the second position relative to the outer tube, the thread is located in the first gap, and the thread is clamped by the inner tube and the outer tube.

4. The thread-cutting device as described in claim 3, characterized in that, The inner tube has a fixing hole on its wall, and the first part is formed by a groove on the outer wall of the inner tube extending distally from the fixing hole. And / or, The second part is formed by a groove extending distally on the inner wall of the outer tube.

5. The thread-cutting device as described in claim 3, characterized in that, The first gap, along the radial direction of the outer tube, is wider than one-third of the diameter of the suture and narrower than the diameter of the suture.

6. The thread-cutting instrument as described in any one of claims 1-5, characterized in that, The thread-cutting hole is fitted to the outer tube, or there is a second gap between the outer wall of the inner tube and the inner wall of the outer tube at the position corresponding to the thread-cutting hole, the width of the second gap being less than half the diameter of the thread.

7. The thread-cutting instrument as described in any one of claims 3-6, characterized in that, The outer tube is provided with a suture guide, and the suture guide and the suture fixing part are arranged opposite to each other along the periphery of the outer tube.

8. The thread-cutting instrument as described in any one of claims 1-7, characterized in that, The outer tube is provided with a limiting part, and the inner tube is provided with a limiting mating part. The limiting part and the limiting mating part have a mating state and a disengaged state. In the engaged state, the limiting portion restricts the movement of the inner tube relative to the outer tube toward the proximal end; In the released state, the inner tube can slide relative to the outer tube along the axial direction of the outer tube; Under the action of the control wire, the inner tube controls the limiting part and the limiting mating part to change from the mating state to the released state.

9. The thread-cutting device as described in claim 8, characterized in that, The limiting part includes an elastic sheet, and the limiting mating part includes a locking hole. When the elastic sheet is partially located in the locking hole, it is in the mating state. Under the action of the control wire, the elastic sheet deforms and completely exits the locking hole, thereby changing the mating state to the disengaged state.

10. The thread-cutting instrument as described in any one of claims 1-9, characterized in that, The inner tube includes a pin, and the distal end of the control wire includes a connecting piece, the connecting piece including a hook; When the hook engages with the pin, the inner tube is connected to the control wire; When the engagement between the hook and the pin is released, the connection between the inner tube and the control wire is released.

11. The thread-cutting device as described in claim 10, characterized in that, When the hook is deformed or broken, the engagement between the hook and the pin is released.

12. The wire-cutting device as described in claim 11, characterized in that, The outer tube includes a blocking part at its proximal end; after the inner tube is blocked by the blocking part, the control wire continues to be pulled towards the proximal end, causing the hook to deform or break.

13. The wire-cutting instrument as described in any one of claims 1-10, characterized in that, The delivery pipe includes a connector, the connector includes a hook, and the outer pipe includes a connection hole; When the hook engages with the connecting hole, the delivery pipe is connected to the outer pipe; When the hook disengages from the connection hole, the connection between the delivery pipe and the outer pipe is released.

14. The thread-cutting device as described in claim 4, characterized in that, The inner tube also has a first hole on its wall, and the first hole is located inside the first part.

15. The thread-cutting device as described in claim 14, characterized in that, The distance between the first hole and the fixing hole is greater than the diameter of the suture.

16. The thread-cutting device as described in claim 14 or 15, characterized in that, The first gap has a radial width along the outer tube that is greater than or equal to one-third of the diameter of the suture and less than or equal to the diameter of the suture.

17. A treatment device, characterized in that, include: stitching; A first clamping device includes a releasably connected first clamp delivery part and a first clamping part, the first clamping part including a suture fixing structure; One or more second clamping devices, including a releasably connected second clamp delivery portion and a second clamping portion, the second clamping portion including at least one thread passage hole in which the suture is slidable; and The wire-cutting device as described in any one of claims 1-16.

18. The treatment device as claimed in claim 17, characterized in that, The suture includes a threading aid and a thread body, with the threading aid located at the distal end of the thread body.

19. The treatment device as claimed in claim 17 or 18, characterized in that, The first clamping part includes a first clip disposed at the distal end of the first clamping part, and the distance between the suture fixing structure and the distal end of the first clamping part is 1 / 5 to 1 / 2 of the length of the first clip.

20. The treatment device according to any one of claims 17-19, characterized in that, The second clamping part includes a second clamping piece disposed at the distal end of the second clamping part, and the ratio of the distance between the wire hole and the distal end of the second clamping part to the length of the second clamping piece is 0.4-0.

6.

21. A method for operating a treatment device, characterized in that, Applied to a treatment device; the treatment device includes: stitching; A first clamping device includes a releasably connected first clamp delivery part and a first clamping part, the first clamping part including a suture fixing structure; One or more second clamping devices, including a releasably connected second clamping delivery portion and a second clamping portion, the second clamping portion including at least one thread passage hole in which the suture is slidable; and a thread cutting device as claimed in any one of claims 1-15; The operation method includes: The first clamping device with the suture fixed thereon is clamped at the first target position, and the first clamping delivery part and the first clamping part are released; After passing the suture through at least one thread hole of one or more second clamping devices, clamp one or more second clamping devices at one or more second target positions, and release the second clamping delivery part and the second clamping part; Pulling the suture causes the first clamping portion and one or more second clamping portions to come together; After passing the suture through the fixing hole and the cutting hole of the suture cutting device, the suture cutting device is moved to the third target position to fix the gathered first clamping part and the second clamping part.

22. The operating method as described in claim 21, characterized in that, The operation method further includes: While maintaining tension on the suture, move the suture cutting device to the third target position; Pull the control wire of the thread cutter to cut the suture, and clamp the cut suture between the suture fixing part and the outer tube of the thread cutter; Continue pulling the control wire to release the connection between the inner tube of the wire cutting device and the control wire; Continue pulling the control wire to release the connection between the outer tube and the delivery tube of the wire cutting device; Remove the delivery pipe.

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