CN120788645A - Head end assembly of suturing device and suturing device - Google Patents

Abstract

A head end assembly of a suturing device and the suturing device relate to the technical field of medical instruments and comprise a head end seat, a clamping mechanism and a holding part, wherein the head end seat is provided with a through hole for a control rod to pass through, the clamping mechanism comprises clamping arms positioned on two opposite sides of the head end seat and used for controlling the clamping arms to open or close through the control rod so as to release or clamp target tissues positioned between the clamping arms and the head end seat, the holding arm is provided with a holding part for holding a connector of the suturing assembly, and the holding part is provided with an opening for inserting a puncture needle of the suturing assembly. The target tissue is clamped when the clamping arm is closed, so that the displacement of the target tissue is prevented, the puncture needle can be inserted into the accommodating part through the opening and connected with the connector, the puncture needle can penetrate through the target tissue in the inserting process, and the puncture is simple and rapid, so that the suture operation efficiency is improved.

Description

Head end assembly of suturing device and suturing device

Technical Field

The application relates to the technical field of medical instruments, in particular to a head end assembly of a suturing device and the suturing device.

Background

The mitral valve is a unidirectional "valve" between the left atrium and the left ventricle, which ensures that blood flows from the left atrium to the left ventricle. The mitral valve has anterior and posterior leaflets that, when closed, ensure blood flow from the left ventricle to the aorta. If the mitral valve is diseased, the mitral valve cannot be restored to a normal state with the anterior and posterior leaflets closed well when the left ventricle is in a contracted state, and the phenomenon of insufficiency occurs, which causes regurgitation of blood, and surgical treatment is required when the regurgitation is severe. At present, one mode of operation treatment is to suture the anterior leaflet and the posterior leaflet of the mitral valve by adopting a suture device, so that the problem of regurgitation is solved, but when the leaflet is punctured by a puncture needle of the suture device, the leaflet is easy to shift, the puncture difficulty is increased, and the operation efficiency of suture is affected.

Disclosure of Invention

The application provides a head end assembly of a suturing device and the suturing device, which can solve the problem of low suturing operation efficiency.

According to one aspect of the present application, there is provided in one embodiment a head end assembly of a suturing apparatus comprising:

the head end seat is provided with a through hole for the control rod to pass through;

The clamping mechanism comprises clamping arms positioned on two opposite sides of the head end seat, the clamping mechanism is used for controlling the clamping arms to open or close through the control rod so as to release or clamp target tissues positioned between the clamping arms and the head end seat, the clamping arms are provided with containing parts for containing connectors of suture assemblies, and the containing parts are provided with openings for inserting puncture needles of the suture assemblies.

In one embodiment, the accommodating portion is a blind hole formed in the clamping arm, and an orifice of the blind hole is the opening.

In one embodiment, the hole opening of the blind hole is arranged on the end surface of the free end of the clamping arm, the hole wall of the blind hole, which is close to one side of the head end seat, is penetrated with a thread passing notch, the thread passing notch is communicated with the opening, and/or the hole opening of the blind hole is provided with a conical surface for guiding the puncture needle to be inserted into the connector.

In one embodiment, the clamping mechanism comprises a driving block connected with the distal end of the control rod, and connecting rods arranged on two opposite sides of the driving block, the fixed end of the clamping arm is provided with a first hinge part and a second hinge part, the first hinge part is positioned on one side, away from the free end, of the second hinge part, one end of the connecting rod is hinged with the driving block, the other end of the connecting rod is hinged with the second hinge part of the clamping arm, and the first hinge part is hinged with the head end seat.

In one embodiment, the fixed end of the clamping arm is provided with a curved hinge section, the hinge section extends to the head end seat in a bending manner, one side of the hinge Duan Yuan away from the free end is provided with the first hinge part, one side of the hinge section close to the free end is provided with the second hinge part, and/or two opposite sides of the far end of the head end seat are respectively provided with a mounting part, the mounting parts protrude out of the side wall surface of the head end seat, the mounting parts are provided with hinge through holes, and the first hinge part passes through the hinge through holes through the pins to be hinged with the head end seat.

In one embodiment, the limit position of the clamping arm rotating towards the direction close to the head end seat is a first limit position, the limit position of the clamping arm rotating towards the direction far away from the head end seat is a second limit position, the rotation angle of the clamping arm rotating from the first limit position to the second limit position is larger than 90 degrees, and when the clamping arm is located at the second limit position, the free end of the clamping arm is located at the far end side of the head end seat.

In one embodiment, the distal end of the connecting rod is provided with two first hinge arms, the two first hinge arms are respectively positioned at two opposite sides of the driving block, and the connecting rod sequentially passes through the first hinge arm at one side, the driving block and the first hinge arm at the other side through a pin to form a hinge joint with the driving block;

and/or the fixed ends of the clamping arms are provided with two second hinge arms, the two second hinge arms are respectively positioned at two opposite sides of the head end seat, the second hinge arms are provided with the first hinge parts and the second hinge parts, the clamping arms sequentially pass through the first hinge parts on one side of the second hinge arms, the distal ends of the head end seat and the first hinge parts on the second hinge arms on the other side of the head end seat through pins to form hinge connection with the head end seat, and the clamping arms sequentially pass through the second hinge parts on one side of the second hinge arms, the proximal ends of the connecting rods and the second hinge parts on the second hinge arms on the other side of the connecting rods through pins to form hinge connection with the connecting rods.

In one embodiment, the free end of the clamping arm is provided with a clamping section, the inner side surface of the clamping section is parallel to the side wall surface of the corresponding side on the head end seat, and a space is reserved between the inner side surface of the clamping section and the side wall surface of the corresponding side on the head end seat.

In one embodiment, the clamping arm further comprises an extension section, the extension section is located at one side of the clamping section, close to the fixed end, when the clamping arm is closed, the distance is a first distance, the distance between the inner side surface of the extension section and the side wall surface of the corresponding side on the head end seat is a second distance, the first distance is smaller than the second distance, and/or, a plurality of convex rib structures are arranged on the inner side surface of the clamping section, the extending direction of the convex rib structures is perpendicular to the axis extending direction of the through hole, the convex rib structures are triangular prism shapes, and an included angle between two prismatic surfaces corresponding to the convex side on the convex rib structures is 30-80 degrees.

According to another aspect of the present application, there is provided in one embodiment a suturing device comprising a suture assembly, a control rod and a head end assembly as described above, wherein the control rod is connected to a clamping mechanism through a through hole in the head end seat for controlling the clamping arm to open or close, the suture assembly comprises a connector, a suture thread, and a puncture needle, the connector is arranged at the end of the suture thread, the connector is arranged in the accommodating portion, the puncture needle corresponds to the opening, and is used for being inserted into the accommodating portion through the opening, connected with the connector and carrying the connector out through the opening.

According to the head end assembly of the suturing device and the suturing device, the suturing device comprises a head end seat and a clamping mechanism, wherein the clamping mechanism can control the clamping arms to open or close through control rods so as to release or clamp target tissues between the clamping arms and the head end seat. The target tissue is clamped when the clamping arm is closed, so that the displacement of the target tissue is prevented, the puncture needle can be inserted into the accommodating part through the opening and connected with the connector, the puncture needle can penetrate through the target tissue in the inserting process, and the puncture is simple and rapid, so that the suture operation efficiency is improved.

Drawings

FIG. 1 is a schematic illustration of the head end assembly of a suturing device of one embodiment;

FIG. 2 is a schematic view of a structure of a holding portion of a clamping arm according to an embodiment;

FIG. 3 is a schematic view of an exploded construction of a clamping mechanism according to one embodiment;

FIG. 4 is a schematic view of a head end seat according to an embodiment;

fig. 5 is a schematic structural diagram of a connector preset in a receiving portion according to an embodiment;

FIG. 6 is a schematic view of an embodiment in which the clamping arms are closed to clamp a target assembly;

FIG. 7 is a schematic view of an embodiment with the arms open;

FIG. 8 is a schematic view of a suturing device of another embodiment;

Reference numerals illustrate:

1-head end seat, 101-mounting part, 102-side wall surface, 2-clamping mechanism, 21-clamping arm, 211-containing part, 212-hinging section, 2121-second hinging arm, 213-clamping section, 214-extending section, 215-conical surface, 216-convex rib structure, 217-first hinging part, 218-second hinging part, 219-threading notch, 22-connecting rod, 221-first hinging arm, 23-driving block, 3-pin, 4-control rod, 5-limiting ring, 6-connector, 7-suture, 8-puncture needle, 9-target tissue and 10-insertion tube.

Detailed Description

The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.

Referring to fig. 1 to 7, a head assembly of a suturing device is provided, which includes a head seat 1, a clamping mechanism 2, and other functional components as needed, and is described in detail below.

As shown in fig. 1 to 5, the head end seat 1 in this embodiment is provided with a through hole for passing the control rod 4, the clamping mechanism 2 includes clamping arms 21 located at two opposite sides of the head end seat 1, the clamping mechanism 2 is used for controlling the clamping arms 21 to open or close by the control rod 4 so as to release or clamp the target tissue 9 located between the clamping arms 21 and the head end seat 1, the clamping arms 21 are provided with a containing portion 211, the containing portion 211 is used for containing the connector 6 of the suture assembly, and the containing portion 211 is provided with an opening for inserting the puncture needle 8 of the suture assembly.

It should be understood that at least two clamping arms 21 are provided in the present embodiment, for example, one clamping arm 21 may be provided on each of opposite sides of the head end seat 1, and in some embodiments, the two clamping arms 21 may be, but are not limited to, symmetrically provided on opposite sides of the head end seat 1. The materials of the head holder 1 and the clamping mechanism 2 are not particularly limited in this embodiment, and may be metal, plastic or other materials. The target tissue 9 in the present embodiment is directly clamped between the clamping arm 21 and the head end seat 1, so that not only can the clamping function of the suturing device be realized, but also the head end structure of the suturing device can be simplified. In this embodiment, the accommodating portion 211 is used for accommodating the connector 6 of the suture assembly, as shown in fig. 6, when suturing, the clamping arm 21 is closed to clamp the target tissue 9 between the clamping arm 21 and the head end seat 1, then the puncture needle 8 is inserted into the opening from the proximal end to the distal end to penetrate the target tissue 9, and is connected with the connector 6 in the accommodating portion 211, and then the connector 6 can be separated from the accommodating portion 211 by dragging the puncture needle 8, and the connector 6 and the suture 7 can be penetrated through the target tissue 9 from the distal end to the proximal end to suture under the dragging of the puncture needle 8. The proximal end in this embodiment is the end near the portion of the suturing device exposed to the outside of the body, and the distal end is the end far from the portion of the suturing device exposed to the outside of the body. Through the setting of holding portion 211, can be in holding portion 211 with connector 6 presets before sewing up, because holding portion 211 locates on the clamp arm 21, from this alright make the tip of suture thread 7 be located one side of target tissue 9 after the clamp, pjncture needle 8 is located the opposite side of target tissue 9, the pjncture needle 8 is passed the target tissue directly during the puncture can, the operation is simple swift, need not extra device and step and sew up in the operation process, the operation degree of difficulty has been reduced, be favorable to improving the operation efficiency of sewing up.

The head end assembly of the suturing device provided in this embodiment includes a head end seat 1 and a clamping mechanism 2, wherein the clamping mechanism 2 can control the clamping arm 21 to open or close through the control rod 4, so as to release or clamp the target tissue 9 between the clamping arm 21 and the head end seat 1. The target tissue 9 is clamped when the clamping arm 21 is closed, so that the mutual displacement between the head end of the suturing device and the target tissue 9 can be prevented, the target tissue 9 can not be displaced when the puncture needle 8 punctures the target tissue 9, the puncture needle 8 is conveniently inserted into the accommodating part 211 through the opening to be connected with the connector 6, and the puncture is simple and rapid, so that the suturing operation efficiency is improved.

In one embodiment, as shown in fig. 2, the accommodating portion 211 may be a blind hole formed on the clamping arm 21, and an opening of the blind hole is an opening. The bottom of blind hole can carry out spacingly to connector 6, is favorable to the connection between pjncture needle 8 and the connector 6. In order to prevent the connecting head 6 from being pulled out of the blind hole by mistake, the depth of the blind hole may be set deeper, for example, the depth of the blind hole may be made larger than twice the length of the connecting head 6. In some embodiments, the hole of the blind hole may be formed on the free end surface of the clamping arm 21, and the hole wall of the blind hole near the side of the head end seat 1 is provided with a line passing notch 219, where the line passing notch 219 communicates with the opening. After the clamping arm 21 clamps the target tissue 9, the free end face of the clamping arm 21 is opposite to the puncture needle 8, and the orifice is arranged on the free end face of the clamping arm 21, so that the puncture needle 8 can be directly inserted into the opening to be connected with the connector 6 in the blind hole after passing through the target tissue 9. The thread passing notch 219 is provided on the side of the clamping arm 21 near the head end seat 1 so that the end of the suture 7 after assembly is provided with the inside of the clamping arm 21, the generalization of the suture 7 is better. In this embodiment, the axial extension direction of the blind hole may be parallel to the axial extension direction of the puncture needle 8, so that the puncture needle 8 may be smoothly inserted into the blind hole, and the central axis of the blind hole may also coincide with the central axis of the hole for assembling the puncture needle 8 in the suture device. In this embodiment, parallel and approximately parallel, overlapping and approximately overlapping are all equivalent alternatives. In some application scenarios, the opening may be provided at other portions of the clamping arm 21 or on other structures outside the clamping arm 21, as desired. When the connector 6 is assembled, as shown in fig. 3and 5, the connector 6 can be placed in the blind hole, and the arranged thread passing notch 219 forms a yielding position for the suture thread 7 connected with the connector 6, so that the suture thread 7 can extend out from one side of the blind hole away from the opening, thereby being beneficial to improving the stability of the connector 6 accommodated in the blind hole. In order to prevent the connector 6 from coming out of the thread passing notch 219, the width of the thread passing notch 219 needs to be slightly smaller than the connector 6 and larger than the width of the suture thread 7. The length of the through-line notch 219 is not limited in this embodiment, and may be the same as the depth of the blind hole, or may be different.

In some embodiments, after the hole wall of the blind hole is provided with the line passing notch 219, the cross section of the blind hole may be C-shaped, that is, the position of the line passing notch 219 between two opposite ends of the C-shape, and the cross section of the blind hole is that of the blind hole perpendicular to the axis direction of the blind hole. In some embodiments, when connector 6 is fixed at the columnar mounting of suture 7 tip, the pore wall of blind hole can set up bellied chucking sand grip, and the extending direction of this chucking sand grip is the same with the axis extending direction of blind hole, and connector 6 can block smoothly into the blind hole when the chucking sand grip is convenient for not only assemble, and connector 6 can receive the extrusion force of chucking sand grip after assembling, is favorable to improving the stability of connector 6 spacing in the blind hole. In some embodiments, when the cross section of the blind hole is C-shaped, two opposite ends of the C-shaped can be bent and extended towards the central axis direction close to the blind hole, so that the two opposite ends of the C-shaped are in a convex structure on the wall surface of the blind hole, and the convex structure forms the clamping convex strip, thereby being beneficial to improving the stability of the connector 6 in the blind hole. In some applications, the thread passing notch 219 may not be provided, for example, the connector 6 may be disposed in a blind hole, so that the suture thread 7 connected to the connector 6 extends from the opening through the side wall of the connector 6. In some embodiments, as shown in fig. 2 and 3, the hole of the blind hole is provided with a conical surface 215 for guiding the puncture needle 8 to be inserted into the connector 6, and the puncture needle 8 can be smoothly inserted into the blind hole to be connected with the connector 6 through the guiding of the conical surface 215. The aperture of the blind hole may or may not be provided with a guiding arcuate surface in some embodiments. The accommodating portion 211 in this embodiment is not limited to a blind hole structure, but may have other structures, such as a structure in which the connector 6 is fixed before the insertion of the puncture needle 8 and the accommodating portion 211 is separated from the puncture needle 8, or a clamping structure.

In one embodiment, as shown in fig. 1-3, the clamping mechanism 2 comprises a driving block 23 for being connected with the distal end of the control rod 4, and connecting rods 22 arranged on two opposite sides of the driving block 23, the fixed end of the clamping arm 21 is provided with a first hinge part 217 and a second hinge part 218, the first hinge part 217 is positioned on one side of the second hinge part 218 away from the free end, one end of each connecting rod 22 is hinged with the driving block 23, the other end is hinged with the second hinge part 218 of the clamping arm 21, and the first hinge part 217 is hinged with the head end seat 1. The clamping arm 21 in this embodiment has a free end and a fixed end, the fixed end is an end of the clamping arm 21 connected with other components, the movement of the fixed end is limited by the other components, and the free end is an end of the clamping arm 21 opposite to the fixed end in a cantilever shape. The driving block 23 is connected with the control rod 4, the control rod 4 can drive the driving block 23 to axially move when axially moving, and the driving block 23 can drive the clamping arm 21 to rotate around the first hinge part 217 through the connecting rod 22 when moving, so that the opening or closing of the clamping arm 21 is realized. In use, the control rod 4 is moved proximally to bring the drive block 23 proximally closer to the head end seat 1, as shown in fig. 6, the clamping arm 21 is closed, the target tissue 9 is clamped between the clamping arm 21 and the head end seat 1, and the control rod 4 is moved distally to bring the drive block 23 distally away from the head end seat 1, as shown in fig. 7, the clamping arm 21 is opened, and the target tissue 9 is released. The specific connection manner between the driving block 23 and the control rod 4 is not limited in this embodiment, and motion transmission can be achieved, for example, a through hole or a blind hole may be provided on the driving block 23, so that the distal end of the control rod 4 may be inserted into the through hole or the blind hole and welded and fixed, or may be fixed in the through hole or the blind hole by an interference fit, and the extending direction of the through hole or the blind hole on the driving block 23 is the same as the extending direction of the axis of the control rod 4.

In some embodiments, the clamping mechanism 2 may be other mechanisms capable of opening or closing the clamping arm 21, for example, the driving block 23 may not be provided, two control rods 4 may be directly provided, the control rods 4 have a certain strength and flexibility, the distal end of each control rod 4 extends out through the head end seat 1 and is hinged with the second hinge part 218 of the clamping arm 21, the first hinge part 217 of the clamping arm 21 is hinged with the distal end of the head end seat 1, and when in use, the two control rods 4 are directly pushed to move distally, so that the clamping arm 21 is pushed to open, and the two control rods 4 are pulled to move proximally, so that the clamping arm 21 is pulled to close. In this embodiment, two objects that are hinged to be connected can be connected in a mutually rotatable manner, for example, but not limited to, the two objects that pass through the hinge in sequence through the pin 3 form a hinge, in order to prevent the pin 3 from falling out, a limiting structure can be arranged at two ends of the pin 3, for example, one end of the pin 3 can be fixedly provided with an axially limited end cap, the other end of the pin can be fixedly provided with a limiting ring 5 through welding after passing through the hinge object, and in order to improve the anti-slip degree of the outer wall surface of the head end assembly, the end caps at two ends of the pin 3 and the outer side surface of the limiting ring 5 can be provided with arc surfaces.

In one embodiment, as shown in fig. 1-3, the fixed end of the clamping arm 21 is provided with a curved hinge section 212, the hinge section 212 extends to the head end seat 1 in a curved manner, a first hinge part 217 is arranged on one side of the hinge section 212 away from the free end, and a second hinge part 218 is arranged on one side of the hinge section 212 close to the free end. The hinge section 212 is bent and extended toward the head end seat 1, so that a certain clamping space can be formed between the clamping arm 21 and the head end seat 1, and a clamping angle formed between the clamping arm 21 and the head end seat 1 is not affected by the hinge of the clamping arm 21 and the head end seat 1, so that the movable angle range of the clamping arm 21 is enlarged. The curvature of the embodiment is not particularly limited, and may be, for example, an arc surface extending obliquely, and the entirety of the clamp arm 21 may have a structure similar to a J shape. In some embodiments, hinge segment 212 may also be in a obliquely extending plane.

In one embodiment, as shown in fig. 4, two opposite sides of the distal end of the head end seat 1 are respectively provided with a mounting portion 101, the mounting portion 101 protrudes from a side wall surface 102 of the head end seat 1, the mounting portion 101 is provided with a hinge through hole, and the first hinge portion 217 is hinged to the head end seat 1 by passing through the hinge through hole through a pin 3. The clamping arms 21 on two sides are hinged with the head end seat 1 through the mounting parts 101 on two corresponding sides, and the mounting parts 101 protrude out of the side wall surface 102 of the head end seat 1, so that the space between the clamping arms 21 and the side wall surface 102 of the head end seat 1 is increased, and the dangerous situation that the clamping arms 21 clamp the target tissue due to too small space between the clamping arms 21 and the side wall surface 102 of the head end seat 1 when clamping the target tissue 9 is avoided. In some embodiments, the clamping arm 21 may be hinged to other parts of the head end seat 1, and the clamping arm 21 may be hinged to the head end seat 1. The direction of axial extension of the hinge through-hole in this embodiment is perpendicular to the direction of axial extension of the control lever 4, and in some embodiments, approximately perpendicular is equivalent to perpendicular in this embodiment.

In one embodiment, as shown in fig. 1 and 7, the limit position of the rotation of the clamping arm 21 in the direction approaching the head end seat 1 is a first limit position, the limit position of the rotation of the clamping arm 21 in the direction separating from the head end seat 1 is a second limit position, the rotation angle of the clamping arm 21 from the first limit position to the second limit position is greater than 90 degrees, and when the clamping arm 21 is located at the second limit position, the free end of the clamping arm 21 is located at the distal end side of the head end seat 1. Since the first hinge portion 217 is hinged to the head end seat 1, the clamp arm 21 can rotate around a portion hinged to the head end seat 1. In the present embodiment, the clamping arm 21 is in a closed state when in the first limit position and in a fully opened state when in the second limit position. The rotation angle of the clamping arm 21 from the first limit position to the second limit position is larger than 90 degrees, so that after the clamping arm 21 is opened, a large enough space for the target tissue to enter is reserved between the clamping arm 21 and the head end seat 1, the target tissue can enter more smoothly, the clamping operation is facilitated, and the situation that the target tissue is clamped by the clamping arm 21 is avoided. In some embodiments, the rotation angle of the clamping arm 21 from the first limit position to the second limit position may be any one of 95 degrees, 100 degrees, 110 degrees, 120 degrees. In some embodiments, when the clamping arm 21 is located at the first extreme position, as shown in fig. 1, the free end of the clamping arm 21 may be parallel to the extending direction of the axis of the through hole provided on the head end seat 1. When the clamping arm 21 is located at the second limit position, as shown in fig. 7, because the rotation angle is greater than 90 degrees, the whole clamping arm 21 can be inclined to the distal end, the free end of the clamping arm 21 is located at the distal end side of the head end seat 1, the connector 6 in the accommodating portion 211 after assembly is also located at the distal end side of the head end seat 1, and the suture 7 can be attached to the inner side surface of the clamping arm 21 and extend obliquely into the accommodating portion 211, so that the effect that the target tissue enters between the clamping arm 21 and the head end seat 1 when the suture 7 is suspended is avoided.

In one embodiment, as shown in fig. 3, two first hinge arms 221 are disposed at the distal end of the connecting rod 22, and the two first hinge arms 221 are respectively located at opposite sides of the driving block 23, so that the connecting rod 22 sequentially passes through the first hinge arm 221 on one side, the driving block 23, and the first hinge arm 221 on the other side through the pin 3 to form a hinge with the driving block 23. The two first hinge arms 221 are respectively located at two opposite sides of the driving block 23, so as to form a preset position between the connecting rod 22 and the driving block 23, which is beneficial to reducing the movable gap between the connecting rod 22 and the driving block 23 and improving the smoothness of the movement of the clamping mechanism 2. In some application scenarios, the end of the connecting rod 22 may be directly hinged against one side of the driving block 23 without providing two first hinge arms 221 as required. In this embodiment, the axis extending direction of the hole of the driving block 23 through which the pin 3 passes is perpendicular to the axis extending direction of the control rod 4, and the holes of the driving block 23 through which the pin 3 passes may be symmetrically arranged. In some implementations, the approximate symmetry is equivalent to the symmetry in the present example.

In one embodiment, the fixed end of the clamping arm 21 is provided with two second hinge arms 2121, the two second hinge arms 2121 are respectively positioned at two opposite sides of the head end seat 1, the second hinge arms 2121 are provided with a first hinge part 217 and a second hinge part 218, the clamping arm 21 sequentially passes through the first hinge part 217 on one side of the second hinge arm 2121, the distal end of the head end seat 1 and the first hinge part 217 on the other side of the second hinge arm 2121 through a pin 3 to form a hinge with the head end seat 1, and the clamping arm 21 sequentially passes through the second hinge part 218 on one side of the second hinge arm 2121, the proximal end of the connecting rod 22 and the second hinge part 218 on the other side of the second hinge arm 2121 through a pin 3 to form a hinge with the connecting rod 22. The second articulated arm 2121 forms the preset position between the clamping arm 21 and the head end seat 1 and between the clamping arm 21 and the connecting rod 22, which is beneficial to reducing the assembly clearance and improving the smoothness of the movement of the clamping mechanism 2. In some application scenarios, two second hinge arms 2121 may be omitted, and the second hinge portion 218 of the clamping arm 21 may be directly hinged to the side of the end portion of the connecting rod 22, and the first hinge portion 217 of the clamping arm 21 may be directly hinged to the side of the distal end of the head end seat 1. The first hinge portion 217 and the second hinge portion 218 in this embodiment may be hinge through holes, and the connecting rod 22, the driving block 23, the clamping arm 21, and the head end seat 1 may all be provided with hinge through holes, and hinge corresponding portions are formed by passing through the corresponding hinge through holes through the pins 3, and axis extension directions of the hinge through holes in this embodiment are all parallel. In some embodiments, the approximate parallelism is equivalent to that in the present example.

In one embodiment, the free end of the clamping arm 21 is provided with a clamping section 213, the inner side surface of the clamping section 213 is parallel to the side wall surface 102 on the corresponding side of the head end seat 1, and a space is reserved between the inner side surface of the clamping section 213 and the side wall surface 102 on the corresponding side of the head end seat 1. The space between the inner side surface of the clamping section 213 and the side wall surface 102 on the corresponding side of the head end seat 1 forms a clamping space for clamping the target tissue 9, and the pressing force to the target tissue 9 can be adjusted by setting the space. In this embodiment, the inner side of the clamping arm 21 and the inner side of the clamping section 213 are both the side surfaces close to the head end seat 1, and the inner side of the clamping section 213 is parallel to the side wall surface 102 on the corresponding side of the head end seat 1, which is beneficial to improving the clamping effect on the target tissue 9, relatively increasing the contact area with the target tissue 9, and reducing the probability of injury to the target tissue 9 due to local contact. In this embodiment, the inner side surface of the clamping section 213 and the side wall surface 102 on the corresponding side of the head end seat 1 may be an arc surface, a plane surface or a combination surface. The whole head end seat 1 can be in a plate-shaped structure when being planar, and correspondingly, the inner side surface of the clamping section 213 can be planar, or the whole head end seat 1 can be in a cylindrical structure, the cylindrical part of the side wall surface 102 is set to be planar, the inner side surface of the clamping section 213 is parallel to the planar part of the side wall surface 102, and the head end seat 1 can be in a cylindrical structure when being an arc-shaped surface, and correspondingly, the inner side surface of the clamping section 213 can be an arc-shaped surface.

In one embodiment, the clamping arm 21 further includes an extension section 214, where the extension section 214 is located on a distal side of the clamping section 213, and when the clamping arm 21 is closed, the distance between the inner side surface of the extension section 214 and the sidewall surface 102 on the corresponding side of the head end seat 1 is a first distance, and the first distance is smaller than the second distance. The axial length of the clamping arm 21 is about 4-10mm, which is about equal to the distance from the rough edge position of the target tissue 9 to the position to be sutured, and the extension 214 can extend the length of the clamping arm 21, so that the clamping section 213 can clamp the tissue at the middle position close to the rough part of the mitral valve leaflet (i.e. the position to be sutured), which is beneficial to avoiding the suturing position from being too close to the rough edge position of the mitral valve or to the transparent area of the mitral valve, thereby avoiding the risk of tearing the mitral valve leaflet during suturing. The first distance is smaller than the second distance, so that only the clamping section 213 is in contact with the tissue, the smaller the contact area is, the larger the stress of the unit area is, the enough clamping force is guaranteed, meanwhile, the target tissue 9 near the position to be sutured is guaranteed to be clamped, and the large-area clamping of the target tissue 9 is prevented from affecting the hemodynamics. In some application scenarios, the extension section 214 may not be provided, so that the length of the clamping section 213 on the clamping arm 21 is relatively increased, and stable clamping of the target tissue 9 is also achieved through adjustment of the clamping force.

In some embodiments, as shown in fig. 3, in order to effectively clamp and not damage the target tissue 9 and improve the clamping effect, a plurality of rib structures 216 may be disposed on the inner side surface of the clamping section 213, where the extending direction of the rib structures 216 is perpendicular to the axis extending direction of the through hole, the rib structures 216 are triangular prism shapes, and an included angle between two prismatic surfaces corresponding to the protruding sides on the rib structures 216 is 30-80 degrees. When the convex rib structure 216 in this embodiment is in a triangular prism shape, the structure is simple, and the clamping effect is good. In some embodiments, the protruding end of the bead may be provided as, but not limited to, an arcuate surface. The included angle between the two prismatic surfaces in this embodiment is 30-80 degrees, and in this range, the rib structure 216 has a good clamping effect, and is not prone to stabbing tissue. Specifically, the included angle between the two prismatic surfaces may be 60 degrees, and the rib structure 216 may be a regular triangular prism shape. In some embodiments, the bead structure 216 may have other shapes, such as circular arcs, trapezoids, etc. In some embodiments, to further improve the clamping effect, a rib structure 216 may be disposed on one of the inner side surface of the clamping section 213 and the side wall surface 102 on the corresponding side of the head end seat 1, and a groove structure corresponding to the rib structure 216 may be disposed on the other surface.

The head end assembly of the suturing device provided in this embodiment includes a head end seat 1 and a clamping mechanism 2, the clamping mechanism 2 can control the clamping arm 21 to open or close through the control rod 4, release or clamp the target tissue 9 located between the clamping arm 21 and the head end seat 1, and the clamping arm 21 is provided with a receiving portion 211. The target tissue 9 is clamped when the clamping arm 21 is closed, the mutual displacement between the head end of the suturing device and the target tissue 9 can be prevented, the connector 6 can be preset in the accommodating part 211 before suturing, the end part of the suture 7 can be positioned on one side of the target tissue 9 after clamping, the puncture needle 8 is positioned on the other side of the target tissue 9, the puncture needle 8 can be inserted into the accommodating part 211 through an opening to be connected with the connector 6, the target tissue 9 can be penetrated in the process of inserting the puncture needle 8, the puncture is simple and rapid, no additional device or step is needed for suturing in the operation process, the operation difficulty is reduced, and the operation efficiency of suturing is improved.

Referring to fig. 1 to 8, an embodiment of the present application further provides a suturing device, including a suture assembly, a control rod 4, and a head end assembly as described above, wherein the control rod 4 is connected to the clamping mechanism 2 through a through hole on the head end seat 1 for controlling the clamping arm 21 to open or close, the suture assembly includes a connector 6, a suture 7, and a puncture needle 8, the connector 6 is disposed at an end of the suture 7, the connector 6 is disposed in the accommodating portion 211, the puncture needle 8 corresponds to the opening, and is used for being inserted into the accommodating portion 211 through the opening to be connected with the connector 6 and carrying the connector 6 out through the opening.

It will be appreciated that the suturing device of the present embodiment may be applied to minimally invasive suture repair of the mitral valve, but is not limited thereto, and may be used for other minimally invasive suturing as desired. The head end assembly in this embodiment is the same as the above embodiment, and will not be described here again. The suture assembly in this embodiment is used for suturing the target tissue 9, the connector 6 of the suture assembly may be, but not limited to, a fixing member fixedly connected to the end of the suture 7, and the distal end of the puncture needle 8 is inserted into the fixing member and fixedly connected to the fixing member, where the connection manner between the fixing member and the puncture needle 8 may be, but not limited to, clamping. Specifically, the fixing member may have an inner cavity into which the needle of the puncture needle 8 is inserted, the needle of the puncture needle 8 is provided with a flange structure that is clamped, the inner cavity wall of the fixing member is provided with a protrusion structure that is clamped with the flange structure, the protrusion structure in this embodiment may be, but is not limited to, an elastic clamping protrusion, and when the needle of the puncture needle 8 is inserted into the inner cavity of the fixing member during clamping, the flange structure on the puncture needle 8 presses the protrusion structure on the inner cavity wall until the flange structure passes through the protrusion structure, and then the protrusion structure returns to abut against the flange structure on the puncture needle 8 to form clamping connection. The connection between the end of the suture 7 and the fixing member is not limited in this embodiment, and may be, for example, a ring-pressed and fixed connection. The connecting head 6 in this embodiment may have other structures, for example, the connecting head 6 may be a connecting ring provided at an end of the suture 7, and an end of the puncture needle 8 is connected and fixed with the connecting ring through a hook structure or a clamping structure, or the connecting head 6 may be a knot provided at an end of the suture 7, and the puncture needle 8 is directly inserted into the knot to hook the knot.

In this embodiment, the puncture needle 8 and the control rod 4 may be assembled in the insertion tube 10 of the suturing device and protrude from the distal end of the insertion tube 10, the head end seat 1 is connected to the distal end of the insertion tube 10, and the insertion tube 10 may be further provided with a wire passing hole through which the suture 7 passes. The control rod 4 passes through the head end seat 1 through a through hole on the head end seat 1 and then is connected with the clamping mechanism 2, and some embodiments can be fixedly connected with a driving block 23 arranged on the clamping mechanism 2. The puncture needle 8 in this embodiment may be, but is not limited to, one that penetrates the target tissue 9 directly after being extended from the insertion tube 10. The connector 6 is arranged in the accommodating part 211, the puncture needle 8 corresponds to the opening, when the device is used, the control rod 4 controls the clamping arm 21 to be closed to clamp the target tissue 9, the puncture needle 8 penetrates through the target tissue 9 and is inserted into the accommodating part 211 through the opening to be connected with the connector 6, the connector 6 is carried out through the opening, and when the puncture needle 8 is retracted to the proximal end from the puncture part of the target tissue 9, the connector 6 is driven to penetrate through the target tissue 9 to realize the operation that the suture 7 penetrates through the target tissue 9, and the control rod 4 controls the clamping arm 21 to be opened to release the target tissue 9.

The suturing device provided in this embodiment includes a head end seat 1 and a clamping mechanism 2, wherein the clamping mechanism 2 can control the clamping arm 21 to open or close through the control rod 4, so as to release or clamp the target tissue 9 between the clamping arm 21 and the head end seat 1. The target tissue 9 is clamped when the clamping arm 21 is closed, so that displacement of the target tissue 9 is prevented, the puncture needle 8 can be inserted into the accommodating part 211 through the opening to be connected with the connector 6, the puncture needle 8 can penetrate through the target tissue 9 in the inserting process, and the puncture is simple and quick, so that the suture operation efficiency is improved.

The foregoing description of the application has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the application pertains, based on the idea of the application.

Claims (10)

1. A head assembly of a suturing device, comprising:

the head end seat is provided with a through hole for the control rod to pass through;

The clamping mechanism comprises clamping arms positioned on two opposite sides of the head end seat, the clamping mechanism is used for controlling the clamping arms to open or close through the control rod so as to release or clamp target tissues positioned between the clamping arms and the head end seat, the clamping arms are provided with containing parts for containing connectors of suture assemblies, and the containing parts are provided with openings for inserting puncture needles of the suture assemblies.

2. The head end assembly of the suturing device of claim 1, wherein the receptacle is a blind bore provided in the clamp arm, and wherein the aperture of the blind bore is the opening.

3. The head end assembly of the suturing device of claim 2, wherein the orifice of the blind hole is arranged on the free end face of the clamping arm, a hole wall of the blind hole near one side of the head end seat is penetrated with a thread passing notch, the thread passing notch is communicated with the opening, and/or the orifice of the blind hole is provided with a conical surface for guiding a puncture needle to be inserted into the connecting head.

4. A head end assembly of a suturing device as claimed in any one of claims 1 to 3 wherein the clamping mechanism includes a drive block for connection to the distal end of the control rod and links provided on opposite sides of the drive block, the fixed end of the clamping arm being provided with a first hinge and a second hinge, the first hinge being located on a side of the second hinge remote from the free end, one end of the links being hinged to the drive block and the other end being hinged to the second hinge of the clamping arm, the first hinge being hinged to the head end seat.

5. The head end assembly of the suturing device of claim 4, wherein the fixed end of the clamp arm is provided with a curved hinge section, the hinge section extends to the head end seat in a curved manner, the hinge Duan Yuan is provided with the first hinge part at one side away from the free end, the hinge section is provided with the second hinge part at one side close to the free end, and/or two opposite sides of the distal end of the head end seat are respectively provided with a mounting part protruding out of the side wall surface of the head end seat, the mounting part is provided with a hinge through hole, and the first hinge part is hinged with the head end seat through the hinge through hole by the pin.

6. The head end assembly of claim 4 wherein the limit of rotation of the clamp arm toward the head end socket is a first limit and the limit of rotation of the clamp arm away from the head end socket is a second limit, the angle of rotation of the clamp arm from the first limit to the second limit being greater than 90 degrees, the free end of the clamp arm being distal to the head end socket when the clamp arm is in the second limit.

7. The head end assembly of the suturing device of claim 4, wherein the distal end of the connecting rod is provided with two first articulated arms, the two first articulated arms are respectively positioned at two opposite sides of the driving block, and the connecting rod sequentially passes through the first articulated arm at one side, the driving block and the first articulated arm at the other side through pins to form articulation with the driving block;

and/or the fixed ends of the clamping arms are provided with two second hinge arms, the two second hinge arms are respectively positioned at two opposite sides of the head end seat, the second hinge arms are provided with the first hinge parts and the second hinge parts, the clamping arms sequentially pass through the first hinge parts on one side of the second hinge arms, the distal ends of the head end seat and the first hinge parts on the second hinge arms on the other side of the head end seat through pins to form hinge connection with the head end seat, and the clamping arms sequentially pass through the second hinge parts on one side of the second hinge arms, the proximal ends of the connecting rods and the second hinge parts on the second hinge arms on the other side of the connecting rods through pins to form hinge connection with the connecting rods.

8. A head end assembly of a suturing device as recited in any one of claims 1-3, wherein the free ends of the clamp arms are provided with clamp segments, wherein the inner sides of the clamp segments are disposed parallel to the corresponding side wall surfaces of the head end seat, and wherein a space is provided between the inner sides of the clamp segments and the corresponding side wall surfaces of the head end seat.

9. The head end assembly of claim 8, wherein the clamping arm further comprises an extension segment, the extension segment is located at one side of the clamping segment near the fixed end, the distance is a first distance when the clamping arm is closed, the distance between the inner side surface of the extension segment and the side wall surface of the corresponding side on the head end seat is a second distance, the first distance is smaller than the second distance, and/or a plurality of convex rib structures are arranged on the inner side surface of the clamping segment, the extending direction of the convex rib structures is perpendicular to the axis extending direction of the through hole, the convex rib structures are triangular prism shapes, and an included angle between two prismatic surfaces corresponding to the convex side on the convex rib structures is 30-80 degrees.

10. A suturing device, comprising a suturing assembly, a control rod and a head end assembly according to any one of claims 1-9, wherein the control rod is connected with a clamping mechanism through a through hole in the head end seat and is used for controlling the clamping arm to open or close, the suturing assembly comprises a connector, a suturing thread and a puncture needle, the connector is arranged at the end part of the suturing thread, the connector is arranged in the accommodating part, the puncture needle corresponds to the opening, and is used for being inserted into the accommodating part through the opening, connected with the connector and carrying the connector out through the opening.