Abdominocentesis stitching instrument

Abstract

The invention relates to the field of medical instruments, in particular to an abdominal cavity puncture stitching instrument which comprises a sleeve, a suture needle and a suture needle. The core rod is arranged in the axial hole in a sliding manner; the unfolding mechanism is arranged in the axial hole, the upper end of the unfolding mechanism is connected with the core rod, the unfolding mechanism comprises a pair of inclined supporting arm assemblies which can stretch out and draw back through the side holes, and the two inclined supporting arm assemblies are configured to be folded in the axial hole in a retracted state and upwards converged and extend in an unfolded state; the needle feeding assembly is telescopically arranged on the inclined support arm assembly, the head of the needle feeding assembly is connected with a puncture needle through a separable connecting structure, and the needle feeding assembly is used for driving the puncture needle to puncture and separating after puncture. By the adoption of the puncture needle, rapid puncture can be facilitated, the puncture path is short, accurate operation is facilitated, pain of a patient in the operation process is reduced by reducing tissue damage and shortening the operation time, the postoperative recovery period of the patient is shortened, and the infection rate and the pain feeling are reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an abdominal puncture suturing device. Background Art

[0002] Laparoscopic trocars are mainly used for creating pneumoperitoneum and establishing a surgical channel in the patient's abdominal cavity during minimally invasive surgery. During the puncture operation, the puncture cone cooperates with the puncture cannula for puncture; after the puncture is completed, the puncture cone needs to be withdrawn from the puncture cannula. After traditional laparoscopic surgery, it is difficult to suture the surgical incision, and problems such as abdominal wall incision bleeding, hematoma, infection, and trocar hernia are likely to occur when using ordinary suture methods. A large number of instruments are used during the suture process, which not only makes the operation cumbersome, reduces the surgical efficiency, but also increases the surgical risk. Therefore, there are still drawbacks and deficiencies in the prior art. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide an abdominal puncture suturing device. By using the present invention, it can facilitate rapid puncture, with a shorter puncture path and a deeper tissue penetration depth, facilitating precise operation. By reducing tissue damage and shortening the operation time, the occurrence of trocar complications can be reduced, and there is no trocar hernia after the operation, reducing the pain of the patient during the operation, and at the same time contributing to the rapid recovery of the patient after the operation, shortening the hospital stay, helping to shorten the postoperative recovery period of the patient, and reducing the infection rate and pain.

[0004] The purpose of the present invention is achieved as follows: An abdominal puncture suturing device, comprising: A cannula, provided with an axial hole having an upper end opening and a side hole provided distally; A mandrel, slidably disposed within the axial hole; An unfolding mechanism, disposed within the axial hole and having its upper end connected to the mandrel, including a pair of inclined support arm assemblies that can extend and retract through the side hole. Among them, the two inclined support arm assemblies are configured to converge within the axial hole in the retracted state and extend upward convergently in the unfolded state; A needle feeding assembly, telescopically disposed on the inclined support arm assemblies, and its head is connected to a puncture needle through a separable connection structure, for driving the puncture needle to puncture and separating after puncture; A traction assembly, including a first traction wire and a second traction wire. The distal ends of the first traction wire and the second traction wire are both connected to the needle feeding assembly. The first traction wire is used to drive the needle feeding assembly to extend outward, and the second traction wire is used to drive it to retract. The proximal ends of the two traction wires both pass through the axial hole of the cannula; A needle collecting member, fixed to the mandrel, and provided with an insertion mating portion for retaining the puncture needle.

[0005] The unfolding mechanism includes: A pair of upper support arms, the first ends of which are hinged to the core rod, and the second ends are hinged to the first ends of the inclined support arm assemblies; A pair of lower support arms, the first ends of which are hinged to the sleeve, and the second ends are hinged to the second ends of the corresponding inclined support arm assemblies.

[0006] The first ends of the two lower support arms are hinged by a first hinge shaft, a first bushing is sleeved on the first hinge shaft to space the two lower support arms apart, and both ends of the first hinge shaft are supported on the side wall of the sleeve; The distal end of the second traction wire is divided into two branches, which respectively extend to both sides after bypassing the first bushing, and extend to the needle feeding assembly through the first wire passing channels of the corresponding lower support arms.

[0007] The first ends of the upper support arms are hinged in the installation groove at the distal end of the core rod through a second hinge shaft, and a second bushing is provided between the first ends of the two upper support arms; The distal end of the first traction wire is divided into two branches, which respectively extend to the needle feeding assembly through the second wire passing channels of the corresponding upper support arms after bypassing the second bushing; A through hole for the traction wire to pass through is provided at the bottom of the installation groove.

[0008] The inclined support arm assembly includes: A pair of inclined support arms, with a wire passing gap formed between the two inclined support arms; Axial tracks provided on each inclined support arm for sliding cooperation with the puncture rod of the needle feeding assembly.

[0009] Axial limiting holes communicating with the axial tracks are provided on two adjacent sides of the inclined support arm, a limiting protrusion extending out through the axial limiting holes is provided on the rod body of the puncture rod, and a traction wire connection portion is formed at the extending end of the axial limiting protrusion.

[0010] The puncture needle includes: A tapered needle tip; A needle body, on the outer periphery of which barbs are provided and a wire passing hole is opened on the side wall; A first insertion portion provided at the tail end of the needle body for axially detachable connection with a second insertion portion at the head of the puncture rod.

[0011] A wire passing window is provided on the upper section of the sleeve, a wire hanging column corresponding to the wire passing window is provided on the side wall of the core rod, and the wire hanging column is used for hanging the suture.

[0012] It further includes a suture, both ends of the suture are led out through the wire passing window, both ends of the suture extend downward and are connected to the corresponding puncture needles; Or, it further includes: A puncture tube sleeved outside the sleeve; Both between the puncture tube and the sleeve and between the sleeve and the core rod are circumferentially fixedly connected; A puncture window is provided on the puncture tube for the puncture needle to pass through.

[0013] The piercing and mating part is made of rubber, elastic plastic or fabric.

[0014] Two upper fork arms are arranged at the second end of the upper arm. An upper fork opening is arranged between the two upper fork arms. The upper fork opening communicates with the second wire passing channel. A third hinge shaft is supported in the upper fork opening. Branches of the first traction wire passing through the second wire passing channel bypass the third hinge shaft and then extend to the needle feeding assembly. Two outer extending ends of the third hinge shaft are respectively hinged to the first ends of the two inclined arm assemblies; Two lower fork arms are arranged on the lower arm. A lower fork opening is arranged between the two lower fork arms. The lower fork opening communicates with the first wire passing channel. A fourth hinge shaft is supported in the lower fork opening. Branches of the second traction wire passing through the first wire passing channel bypass the fourth hinge shaft and then extend to the needle feeding assembly. Two outer extending ends of the fourth hinge shaft are respectively hinged to the second ends of the two inclined arm assemblies.

[0015] Both ends of the second hinge shaft are in sliding fit with the limiting sliding grooves on the inner wall of the sleeve; A support frame is arranged at the distal end of the core rod. Side walls are supported at both side edges of the bottom wall of the support frame. An installation groove is formed between the two side walls; The arm length of the upper arm is less than that of the lower arm; A limiting part is formed on the lower side wall of the side hole for limiting the rotation angle of the lower arm.

[0016] The first plug-in part is a slot, and the slot extends axially and communicates with the wire passing hole.

[0017] With the above solution, the beneficial effects are as follows: The deployment mechanism can be retracted into the axial hole. The sleeve can pass through the puncture hole and penetrate in and out of the puncture hole. The side hole is used for the deployment mechanism to extend out. When the deployment mechanism is deployed, the two inclined arm assemblies can converge and extend upward, so that the needle delivery assembly can move to the designated position. The puncture needles that can be classified and connected on the needle delivery assembly can be fixed in the early stage, so that it can move to the designated position. In the early stage of puncture, it can push the puncture needle to extend outward for puncture. After puncturing the fascia layer, the puncture needle continues to extend outward until it punctures the insertion mating part on the needle collecting part. The puncture needle stays on the insertion mating part and separates from it when the needle delivery assembly retracts. After the needle delivery assembly is reset, the deployment structure retracts into the axial hole, which is convenient to be taken out through the puncture hole along with the sleeve, while the puncture needle is taken out along with the needle collecting part, and at the same time, the suture can be pulled out. The first traction wire provides a pulling force through tension, which can provide an outward puncture thrust during puncture. The second traction wire provides a pulling force through tension, which can provide a pulling force for the needle delivery assembly to retract and reset, and the pulling force direction for the needle delivery assembly is stable through tension, and the pulling force directly acts on the moving direction, so the needle delivery assembly has good stability and smooth movement. The traction wire can be deployed and folded along with the deployment mechanism, and is easy to be stored in the sleeve or the mandrel and can pass through the puncture hole. With the present invention, it can facilitate rapid puncture, the puncture path is short, which is convenient for precise operation. By reducing tissue damage and shortening the operation time, the occurrence of puncture hole complications can be reduced, and there is no incisional hernia after the operation, reducing the pain of the patient during the operation. At the same time, it also helps the patient's rapid recovery after the operation, shortens the hospital stay, helps shorten the patient's postoperative recovery period, and reduces the infection rate and pain.

[0018] The following further illustrates the present invention with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic diagram of the deployed state of the deployment mechanism of the present invention; Figure 3 is a partial enlarged view of the deployment mechanism; Figure 4 is an exploded schematic diagram of the deployment mechanism; Figure 5 is a schematic diagram of the puncture state of the deployment mechanism; Figure 6 is a schematic diagram of the retracted state of the deployment mechanism; Figure 7 is a schematic diagram of the layout structure of the wire hanging post; Figure 8 is a schematic diagram of the structure of the sleeve; Figure 9 is a schematic diagram of the layout structure of the installation groove; Figure 10 It is a structural schematic diagram of the upper support arm; Figure 11 is a structural schematic diagram of the lower arm; Figure 12 It is a structural schematic diagram of the oblique support arm; Figure 13 is a schematic diagram of the structure of the puncture needle; Figure 14 Schematic diagram of casing arrangement.

[0020] In the accompanying drawings, 33 is a lower fork, 100 is a sleeve, 101 is a convex ridge, 110 is an axial hole, 120 is a side hole, 121 is a limiting portion, 130 is a line window, 140 is a limiting slide groove, 200 is a core rod, 210 is a mounting groove, 211 is a through hole, 220 is a hanging line column, 230 is a support frame, 300 is an unfolding mechanism, 310 is an oblique support arm assembly, 311 is an oblique support arm, 312 is a line clearance, 313 is an axial track, 314 is an axial limiting hole, 320 is an upper support arm, 321 is a second hinge shaft, 322 is a second bushing, 323 is a first line channel, 324 is an upper fork Mouth, 325 is the third hinge axis, 330 is the lower support arm, 331 is the first hinge axis, 332 is the first bushing, 334 is the second wire passing channel, 335 is the fourth hinge axis, 400 is the needle feeding assembly, 401 is the limiting protrusion, 410 is the puncture rod, 500 is the puncture needle, 510 is the needle head, 520 is the needle body, 530 is the barb, 540 is the threading hole, 550 is the first plug-in part, 600 is the traction assembly, 610 is the first traction wire, 620 is the second traction wire, 700 is the needle collection part, 710 is the puncture matching part, 800 is the suture, 900 is the puncture tube, and 910 is the puncture window. DETAILED DESCRIPTION

[0021] Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as center, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In the description of the present application, the terms first and second are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with first and second may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of multiple is two or more. It should be noted that in practical applications, due to the limitations of device accuracy or installation error, an absolute parallel or perpendicular effect is difficult to achieve. In the present application, the descriptions of vertical, parallel or in the same direction are not absolute limiting conditions, but mean that a vertical or parallel structure can be set within a preset error range and the corresponding preset effect can be achieved. In this way, the technical effect of the defined features can be maximized, and the corresponding technical solution is easy to implement and has high feasibility.

[0024] In the description of this specification, the description with reference to terms such as an embodiment, some embodiments, examples, specific examples, or some examples, etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0025] See Figures 1 to 14 , an embodiment of an abdominal puncture suturing device. An abdominal puncture suturing device includes a cannula 100, a mandrel 200, a deployment mechanism 300, a needle delivery assembly 400, a traction assembly 600, and a needle collection member 700. The cannula 100 is provided with an axially oriented hole 110 having an upper end opening and a side hole 120 disposed distally, wherein the axially oriented hole 110 is for installing the mandrel 200, and the side hole 120 allows the deployment mechanism 300 to extend and retract.

[0026] The mandrel 200 is slidably disposed within the axially oriented hole 110. The mandrel 200 can slide axially relative to the axially oriented hole 110, and an axial thrust can be applied to the deployment mechanism 300 axially. The deployment mechanism 300 is disposed within the axial hole 110 and has its upper end connected to the core rod 200. It includes a pair of inclined support arm assemblies 310 that can expand and contract through the side holes 120. Among them, the two inclined support arm assemblies 310 are configured to converge within the axial hole 110 in the retracted state and extend upward convergently in the deployed state. They can be accommodated within the axial hole 110 in the retracted state and can travel through the puncture hole with the sleeve 100. When reaching the desired position, they can be deployed. Among them, the inclined support arm 311 in the deployed state can constrain the delivery direction of the needle delivery assembly 400. The needle delivery assembly 400 is telescopically disposed on the inclined support arm assembly 310. Through the telescopic mating structure, the needle delivery assembly 400 can extend outward in the desired direction. Moreover, in the early stage of retraction, it is convenient to travel within the sleeve 100. After the puncture is completed in the later stage, it can be retracted for convenient storage. Its head is connected to the puncture needle 500 through a separable connection structure, which is used to drive the puncture needle 500 to puncture and separate after the puncture. When delivering the puncture needle 500, it can apply a thrust to the puncture so that it can puncture human tissue. When the puncture is completed, it can be separated from the needle delivery assembly 400, leaving the puncture needle 500 at the designated position, and then leaving the traction line segment or thread on the puncture needle 500.

[0027] The traction assembly 600 includes a first traction wire 610 and a second traction wire 620. The distal ends of the first traction wire 610 and the second traction wire 620 are both connected to the needle delivery assembly 400. The first traction wire 610 is used to drive the needle delivery assembly 400 to extend outward, and the second traction wire 620 is used to drive its retraction. The proximal ends of the two traction wires both pass through the axial hole 110 of the sleeve 100. The travel and retraction of the needle delivery assembly 400 can be manipulated through the traction wires. The traction wires can wind around the deployment mechanism 300, which is convenient for layout. At the same time, the structure of the traction wires is relatively simple, and they can withstand a large traction force during travel and puncture, ensuring the reliability of puncturing and retracting the puncture needle 500.

[0028] The needle collecting member 700 is fixed to the core rod 200 and is provided with an insertion mating portion 710 for the puncture needle 500 to stay. Through this needle collecting member 700, the puncture needle 500 can be punctured after penetrating the tissue. After the puncture needle 500 penetrates and stays on the insertion mating portion 710, it is stuck in the insertion mating portion 710. Through the cooperative removal, it is then pulled out through the puncture hole, and the suture 800 mounted on the puncture needle 500 is led out for knotting operation.

[0029] Among them, the unfolding mechanism 300 can have an unfolded state and a folded state. In the unfolded state, the puncture needle 500 in the folded state can be unfolded in the abdominal cavity. After entering the abdominal cavity, in the unfolded state, the puncture needle 500 deviates from the axis by a large distance at the puncture hole, and at the same time, the position of the pre-puncture in the abdominal cavity is fixed. On the circumference, the puncture needle 500, that is, on both sides of the unfolding mechanism 300, its circumferential relative position is stable.

[0030] During the puncture process, the puncture needle 500 is guided so that the puncture needle 500 penetrates into the tissue at a desired angle. Specifically, in some embodiments, the unfolding mechanism 300 includes: A pair of upper arms 320, the first ends of which are both hinged to the core rod 200, and the second ends are hinged to the first ends of the inclined arm assembly 310. After entering the puncture hole, the unfolding mechanism 300 unfolds, and the two upper arms 320 unfold. During the suturing process, the two unfolded upper arms 320 can be used for positioning, so that the entire upper arm 320 is closely attached to the wall surface of the abdominal cavity, that is, the end face of the inner opening of the puncture hole, thereby axially positioning the entire suturing device, improving the axial accuracy during puncture. At the same time, the two upper arms 320 have a large contact area with the abdominal wall, and the abdominal wall can provide a large supporting force for the unfolding mechanism 300, reducing the damage to non-suturing positions.

[0031] A pair of lower arms 330, the first ends of which are hinged to the sleeve 100 through, specifically, the first ends are connected to each other through a hinge structure, and the hinge structure is connected to the sleeve 100 to form the hinge of the lower arm 330 and the sleeve 100. The connection method of the hinge structure and the sleeve 100 can be fixed connection, abutment, etc. to constrain the position of the hinge structure. After the hinge position is constrained, it can force the unfolding mechanism 300 to unfold or fold; the second ends of the two lower arms 330 are hinged to the second ends of the inclined arm assembly 310. The arm length of the upper arm 320 is less than the arm length of the lower arm 330; the entire unfolding mechanism 300 forms a trapezoidal structure after unfolding. Of course, according to clinical needs, different differences in the arm lengths of the upper arm 320 and the lower arm 330 can be selected as needed, so that the waistline of the trapezoid, that is, the angle of the inclined arm 311, can meet the expected depth and the appropriate distance between the needle insertion hole and the puncture hole. If this distance is too small, the suturing effect is poor; if it is too large, it will increase the pain of the patient during suturing. The inclined arm 311 can adjust the width and thickness of the suture according to the selected requirements, and has a smaller puncture path and a better suturing effect under the condition of meeting the puncture depth.

[0032] Among them, when the mechanism composed of two upper arms 320, two oblique arm assemblies 310 and two lower arms 330 is under stress at both ends, the two oblique arm assemblies 310 can extend outward, and at the same time, the angle of the oblique arm 311 can be swung, and after swinging to the desired position, they can be arranged at an angle and converge and extend upward to form an inclined guide track, which can obliquely puncture the tissue. During oblique puncture, the axial force is concentrated during linear advancement, the penetration efficiency is high, the damage is more limited, and the movement path is short. At the same time, due to the inclined linear puncture, the tissues on both sides of the needle rod are more uniform, avoiding asymmetric squeezing of the tissue. The puncture needle 500 and the puncture rod 410 travel along a straight path, which is more direct and smooth. Due to the linear puncture characteristics of the puncture needle 500 and the puncture rod 410, the reaction of the surrounding tissue to them is also more linear and uniform.

[0033] In some embodiments, the hinge structure includes a first hinge shaft 331, and both ends of the first hinge shaft 331 are supported on the sleeve 100 to achieve the stability of the hinge position. The first ends of the two lower arms 330 are hinged through the first hinge shaft 331, and the first hinge shaft 331 is sleeved with a first bushing 332 to separate the two lower arms 330, and both ends of the first hinge shaft 331 are supported on the side wall of the sleeve 100; The distal end of the second traction wire 620 is divided into two branches, which respectively bypass the first bushing 332 and extend to both sides, and extend to the needle delivery assembly 400 through the first wire passage 323 of the corresponding lower support arm 330.

[0034] It can be understood that, whether in the folded state or the unfolded state, the position of the first hinge shaft 331 is constrained. When unfolding, it is compressed, and then the lower arm 330 is swung to both sides, and then the second end of the oblique arm 311 is pulled to unfold. When folding, it can limit the movement of the second end of the lower arm 330. After the lower arm 330 swings centripetally, the second end of the oblique arm 311 is pulled to fold toward the center. The first bushing 332 can be arranged to keep the two lower arms 330 spaced apart to avoid friction between the two lower arms 330, that is, to form a scissor effect, to avoid damage to the suture 800. At the same time, the first bushing 332 can also be used for the second traction wire 620 for traction to be wound out, so as to change the routing and force transmission direction of the second traction wire 620. The second traction wire 620 has two branches, and the whole can be subjected to force and pull the needle delivery assembly 400 at the same time, and its movement synchronization is good.

[0035] In some embodiments, the first end of the upper arm 320 is hinged to the installation groove 210 at the distal end of the core rod 200 through a second hinge shaft 321, and a second bushing 322 is provided between the first ends of the two upper arms 320; the distal end of the first traction wire 610 is divided into two branches, which respectively bypass the second bushing 322 and then extend to the needle feeding assembly 400 through the second wire passing channels 334 of the corresponding upper arms 320; a through hole 211 for the traction wire to pass through is provided at the bottom of the installation groove 210. The arrangement of the second bushing 322 enables the two upper arms 320 to be kept at intervals, avoiding the friction between the arm surfaces of the two upper arms 320, that is, forming a scissor effect and avoiding damage to the suture 800 or the traction wire. At the same time, the second bushing 322 can also be used for the first traction wire 610 for traction to wind out, realizing the change of the wire routing and force transmission direction of the first traction wire 610. A through hole 211 for the traction wire to pass through is provided at the bottom of the installation groove 210, and the proximal part of the traction wire is led out through the inner hole of the core rod 200. The first traction wire 610 has two branches, and the whole can be stressed to traction the needle feeding assembly 400 at the same time, and its motion synchronism is good.

[0036] In some embodiments, a support frame 230 is provided at the distal end of the core rod 200. The bottom wall of the support frame 230 supports the side walls at both sides, and an installation groove 210 is formed between the two side walls. It can be understood that the support frame 230 can support the hinge shaft, and at the same time, the two sides of the installation groove 210, that is, the support side walls, can limit the upper arm 320 in the axial direction of the hinge shaft, and the bottom of the installation groove 210 can limit the upper arm 320, so that after unfolding, its unfolded angle position is stable.

[0037] In some embodiments, the two ends of the second hinge shaft 321 are slidably matched with the limit sliding grooves 140 on the inner wall of the sleeve 100 and can penetrate out of the side wall of the installation groove 210; through the limit sliding grooves 140, the first hinge shaft 331 can be restricted, so that the hinged position of the two upper arms 320 remains centered all the time, and the two upper arms 320 can move relative to the first hinge shaft 331.

[0038] In some embodiments, the inclined arm assembly 310 includes a pair of inclined arms 311, and a wire passing gap 312 is formed between the two inclined arms 311; the axial tracks 313 provided on each inclined arm 311 are used for slidably matching with the puncture rod 410 of the needle feeding assembly 400. Among them, Figure 10Among them, the axial track 313 shown may be a linear guide hole provided on the inclined support arm 311 and extending along its long axis. A needle feeding assembly 400 is slidably fitted in the linear guide hole. The axial track 313 can accommodate the needle feeding assembly 400, can accommodate the puncture needle 500, and guide the puncture needle 500 during its advancement. Additionally, the axial track 313 may also be in a groove shape, which is used to constrain the puncture rod 410 and guide the puncture rod 410. The two ends of two sutures 800 can be hung on a pair of inclined support arms 311. The entire stapler can hang at least two sutures 800 and can achieve at least double-line suturing.

[0039] Furthermore, axial limit holes 314 communicating with the axial track 313 are provided on two adjacent sides of the inclined support arm 311. A limit protrusion 401 extending outward through the axial limit hole 314 is provided on the rod body of the puncture rod 410. The outer extending end of the axial limit protrusion 401 forms a traction wire connection part. By providing the axial limit holes 314 and making the axial limit protrusion 401 extend outward, the traction wire can traction the puncture needle 500 on the side of the puncture rod 410. At the same time, the axial limit holes 314 can constrain the extreme position of the movement of the limit protrusion 401. Further, two adjacent axial limit protrusions 401 are integrally formed and are both connected to the traction wire through one connection position. With this structure, the structure can be simplified, and at the same time, the synchronous movement of the two puncture rods 410 can be ensured, and eccentric loading can be prevented.

[0040] In some embodiments, two upper fork arms are provided at the second end of the upper support arm 320. An upper fork opening 324 is provided between the two upper fork arms. The upper fork opening 324 communicates with the second wire passing channel 334. A third hinge shaft 325 is supported in the upper fork opening 324. A branch of the first traction wire 610 passing through the second wire passing channel 334 bypasses the third hinge shaft 325 and then extends to the needle feeding assembly 400. The two outer extending ends of the third hinge shaft 325 are respectively hinged to the first ends of the two inclined support arms 311 of the inclined support arm assembly 310. With this structure, it can provide a passing channel for the first traction wire 610. At the same time, the first traction wire 610 can be constrained by the upper fork opening 324. The hinge shaft part in the upper fork opening 324 can also provide the winding requirement of the first traction wire 610. At the same time, a gap can be formed between the two inclined support arms 311.

[0041] The lower arm 330 is provided with two lower fork arms, and a lower fork opening 33 is arranged between the two lower fork arms. The lower fork opening 33 is in communication with the first wire passing channel 323. A fourth hinge shaft 335 is supported within the lower fork opening 33. A branch of the second traction wire 620 passing through the first wire passing channel 323 bypasses the fourth hinge shaft 335 and then extends to the needle feeding assembly 400. The two outer extending ends of the fourth hinge shaft 335 are respectively hinged to the second ends of the two inclined arms 311 of the inclined arm assembly 310. With this structure, it can provide a passing channel for the second traction wire 620. At the same time, the second traction wire 620 can be constrained by the lower fork opening 33. The hinge shaft part in the lower fork opening 33 can also provide the winding requirement of the second traction wire 620. Meanwhile, a gap for the traction wire to pass through can be formed between the two inclined arms 311. The wire passing channel can be formed by structures such as a cut groove, a cut plane, a notch or a hole, or can be composed of multiple sections or formed by a combination of a cut groove, a cut plane, a notch or a hole to form a passage for the traction wire to pass through.

[0042] Before puncture, the separable connection structure can preliminarily fix the puncture needle 500. During puncture, a thrust is applied to the puncture needle 500, and the axes of the puncture needle 500 and the puncture rod 410 are aligned and the axial thrust can be transmitted. When the puncture rod 410 retreats, it can be separated from the puncture needle 500, causing it to remain on the needle collecting member 700. In some embodiments, it can be connected by magnetic adsorption to form a separable connection structure, and can also be connected in the form of an adhesive elastic buckle or an elastic chuck, etc. Of course, a break connection structure can also be provided between the puncture needle 500 and the puncture rod 410 for connection, which will break overload when being pulled.

[0043] Specifically, in some embodiments, the puncture needle 500 includes a tapered needle tip 510, a needle body 520, and a first insertion portion 550 provided at the tail end of the needle body 520. The needle body 520 is provided with barbs 530 and threading holes 540 around its circumference, and the side wall is provided with threading holes 540 for fixing the end of the suture 800. The end of the suture 800 can pass through this hole and be relatively fixed to the threading hole 540 through a knot. The insertion portion provided at the tail end of the needle body 520 is used for axially detachable connection with the second insertion portion at the head of the puncture rod 410 of the needle feeding assembly 400. Through the barbs 530, the puncture needle 500 is not easily detached after being inserted into the insertion and cooperation portion 710, improving the pull-off force and separating the puncture needle 500 from the puncture rod 410. The tail end of the needle body 520 is provided with a tenon, a slot or an insertion hole, etc. adapted to the head of the puncture rod 410; as Figure 4 shown, the second insertion portion at the front section of the puncture rod 410 is a tenon in the shape of a rod, and the adapted first insertion portion 550 is a socket or a slot. Figure 4In this case, the first insertion part 550 is a slot, which axially extends and intersects with the wire threading hole 540. By adopting this method, it is convenient to process the wire threading hole 540 with a smaller aperture. The depth of the wire threading part of the wire threading hole 540 is relatively shallow. At the same time, the lateral opening of the slot can not only observe the insertion state of the second insertion part, but also facilitate the quick wire threading and fixing of the end of the suture 800. The axially detachable connection can not only initially hold and fix the puncture needle 500 in the early stage, but also provide sufficient axial thrust during puncture. When separating, the first insertion part 550 in the insertion state is separated from the second insertion part to achieve separation.

[0044] In some embodiments, a wire passing window 130 is provided in the upper section of the sleeve 100, and a wire hanging post 220 is provided on the side wall of the core rod 200. The wire hanging post 220 is used to hang the suture 800. Both ends of the suture 800 are led out through the wire passing window 130. The two ends of the suture 800 extend downward and are connected to the corresponding puncture needles 500. For example, among the four puncture needles 500 distributed in a matrix, the two puncture needles 500 located on the long side of the rectangle are respectively connected to both ends of the same suture 800. In the initial stage of puncture, the suture 800 can be hung on the wire hanging post 220 through the wire passing window 130. As the relative position between the sleeve 100 and the core rod 200 is adjusted, the wire hanging post 220 moves along with the sleeve 100, and the suture 800 slips off the wire hanging post 220. Due to the adjustment of the relative position between the sleeve 100 and the core rod 200, it can thus adapt to the unfolding and puncture of the unfolding structure, with coordinated movement rhythm. In the early stage of puncture, the suture 800 can be well accommodated, the suture 800 is arranged more smoothly, not easily knotted and avoiding jamming of the suture 800, and in the later stage, the suture 800 can be released to enable it to complete puncture.

[0045] In some embodiments, the suture 800 can also be pre-installed. During production and pre-installation, the puncture device further includes the suture 800. Both ends of the suture 800 are led out through the wire passing window 130. The two ends of the suture 800 extend downward and are connected to the corresponding puncture needles 500. The wire hanging post 220 can be arranged in a hole in the inner wall of the core rod 200 and extend upward in the hole. The hole can be a square hole or a round hole, etc.

[0046] In some embodiments, the piercing mating part 710 is made of rubber, elastic plastic or fabric. After the puncture needle 500 pierces, it can have a large frictional force with the puncture needle 500, enabling the puncture needle 500 to stay. Of course, barbs 530 provided on the puncture needle 500 can better hook and have a high anti-retreat property.

[0047] In some embodiments, it further includes a puncture tube 900, which is sleeved outside the sleeve 100; both between the puncture tube 900 and the sleeve 100 and between the sleeve 100 and the core rod 200 are circumferentially fixedly connected. Specifically, protrusions and corresponding limiting grooves can be adopted, and the protrusions can be pin nails or convex ribs 101, etc.Figure 1 As shown, the protrusion provided on the inner wall of the sleeve 100 is a convex rib 101, which can be integrally formed on the pipe wall; the puncture tube 900 is provided with a puncture window 910 for the puncture needle 500 to pass through. The puncture tube 900 is used for abdominal wall puncture. At the same time, during suturing, its inner hole is used to form a channel for the stapler to enter and exit.

[0048] In some embodiments, a limiting portion 121 is formed on the lower side wall of the side hole 120 to limit the rotation of the lower support arm. Through this structure, the rotation of the lower support arm 330 can be limited, so that its position is stable after expansion.

[0049] With the above solution, the deployment mechanism 300 can be retracted into the axial hole 110. The sleeve 100 can be inserted into and taken out through the puncture hole. The side hole 120 is used for the deployment mechanism 300 to extend out. When the deployment mechanism 300 is deployed, the two inclined support arm assemblies 310 can converge and extend upward, so that the needle feeding assembly 400 moves to a designated position. The puncture needles 500 that can be classified and connected on the needle feeding assembly 400 can be fixed in the early stage, so that they move to the designated position. In the early stage of puncture, the puncture needles 500 can be pushed outwards to perform puncture. After puncturing the fascia layer, the puncture needles 500 continue to extend outwards until they puncture the insertion matching portion 710 on the needle collecting member 700. The puncture needles 500 stay on the insertion matching portion 710 and are separated from the needle feeding assembly 400 when the needle feeding assembly 400 retracts. After the needle feeding assembly 400 is reset, the deployment structure retracts into the axial hole 110, which is convenient for taking out through the puncture hole along with the sleeve 100, and the puncture needles 500 are taken out along with the needle collecting member 700, and at the same time, the suture 800 can be pulled out. The first traction wire 610 can provide an outward puncture thrust during puncture, and the second traction wire 620 can provide a pulling force when the needle feeding assembly 400 retracts and resets. The traction wires can be deployed and folded along with the deployment mechanism 300, and are easy to be stored in the sleeve 100 or the core rod 200 and can pass through the puncture hole. By adopting the present invention, it can facilitate rapid puncture, the puncture path is short, which is convenient for precise operation. By reducing tissue damage and shortening the operation time, the occurrence of puncture hole complications can be reduced, and there is no incisional hernia after the operation, which reduces the pain of the patient during the operation. At the same time, it also helps the patient to recover quickly after the operation, shortens the hospitalization time, helps to shorten the postoperative recovery period of the patient, and reduces the infection rate and pain.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An abdominal puncture suture device, characterized in that, Comprising: A cannula (100) provided with an axial hole (110) having an upper end opening and a laterally disposed side hole (120) at the distal side; A core rod (200) slidably disposed within the axial hole (110); An unfolding mechanism (300) disposed within the axial hole (110) and having an upper end connected to the core rod (200), including a pair of inclined support arm assemblies (310) that can extend and retract through the side hole (120). Among them, the two inclined support arm assemblies (310) are configured to converge and retract within the axial hole (110) in the retracted state and extend upward and converge in the unfolded state; A needle delivery assembly (400) telescopically disposed on the inclined support arm assembly (310), the head of which is connected to a puncture needle (500) through a separable connection structure, for driving the puncture needle (500) to puncture and separating after puncture; A traction assembly (600) including a first traction wire (610) and a second traction wire (620). The distal ends of the first traction wire (610) and the second traction wire (620) are both connected to the needle delivery assembly (400). The first traction wire (610) is used to drive the needle delivery assembly (400) to extend outward, and the second traction wire (620) is used to drive it to retract. The proximal ends of the two traction wires both pass through the axial hole (110) of the cannula (100); A needle collection member (700) fixed to the core rod (200) and provided with an insertion mating portion (710) for retaining the puncture needle (500).

2. The abdominal puncture suture device according to claim 1, wherein The unfolding mechanism (300) includes: A pair of upper support arms (320), the first ends of which are both hinged to the core rod (200), and the second ends are hinged to the first ends of the inclined support arm assemblies (310); A pair of lower support arms (330), the first ends of which are hinged to the cannula (100), and the second ends are hinged to the second ends of the corresponding inclined support arm assemblies (310).

3. The abdominal puncture suture device according to claim 2, wherein The first ends of the two lower support arms (330) are hinged through a first hinge shaft (331). A first bushing (332) is sleeved on the first hinge shaft (331) to space the two lower support arms (330) apart. The two ends of the first hinge shaft (331) are supported on the side wall of the cannula (100); The distal end of the second traction wire (620) is divided into two branches, respectively bypassing the first bushing (332) and then extending to both sides, and extending to the needle delivery assembly (400) through the first wire passing channel (323) of the corresponding lower support arm (330).

4. The abdominal puncture suture device according to claim 2 or 3, wherein The first ends of the upper support arms (320) are hinged to the installation groove (210) at the distal end of the core rod (200) through a second hinge shaft (321). A second bushing (322) is provided between the first ends of the two upper support arms (320); The distal end of the first traction wire (610) is divided into two branches, respectively bypassing the second bushing (322) and then extending to the needle delivery assembly (400) through the second wire passing channel (334) of the corresponding upper support arm (320); A wire passing hole (211) for the traction wire to pass through is provided at the bottom of the installation groove (210).

5. The abdominal puncture suture device according to claim 2, wherein, The inclined support arm assembly (310) includes: A pair of inclined support arms (311), with a wire-passing gap (312) formed between the two inclined support arms (311); Axial tracks (313) provided on each inclined support arm (311) for sliding cooperation with the puncture rod (410) of the needle feeding assembly (400).

6. The abdominal puncture suture device according to claim 5, wherein, Axial limiting holes (314) communicating with the axial tracks (313) are arranged on two adjacent sides of the inclined support arm (311). A limiting protrusion (401) extending outward through the axial limiting hole (314) is arranged on the rod body of the puncture rod (410), and the outer extending end of the axial limiting protrusion (401) forms a traction wire connection part.

7. The abdominal puncture suture device according to claim 1, wherein The puncture needle (500) includes: A tapered needle tip (510); A needle body (520) with barbs (530) provided on its outer periphery and a wire-passing hole (540) opened on its side wall; A first insertion part (550) arranged at the tail end of the needle body (520) for axially detachable connection with the second insertion part at the head of the puncture rod (410).

8. The abdominal puncture suture device according to claim 1, wherein, A wire-passing window (130) is arranged on the upper section of the sleeve (100), and a wire-hanging column (220) corresponding to the wire-passing window (130) is arranged on the side wall of the core rod (200). The wire-hanging column (220) is used for hanging the suture (800).

9. The abdominal puncture suture device according to claim 8, wherein, It further includes a suture (800). Both ends of the suture (800) are led out through the wire-passing window (130). The two ends of the suture (800) extend downward and are connected to the corresponding puncture needles (500); Or, it further includes: A puncture tube (900) sleeved outside the sleeve (100); Both between the puncture tube (900) and the sleeve (100) and between the sleeve (100) and the core rod (200) are circumferentially fixedly connected; A puncture window (910) is arranged on the puncture tube (900) for the puncture needle (500) to pass through.

10. The abdominal puncture suturing device according to claim 5, wherein Two upper fork arms are arranged at the second end of the upper support arm (320), and an upper fork opening (324) is arranged between the two upper fork arms. The upper fork opening (324) is in communication with the second wire-passing channel (334). A third hinge shaft (325) is supported in the upper fork opening (324). Branches of the first traction wire (610) passing through the second wire-passing channel (323) bypass the third hinge shaft (325) and then extend to the needle feeding assembly (400). The two outer extending ends of the third hinge shaft (325) are respectively hinged to the first ends of the two inclined support arms (311) of the inclined support arm assembly (310); Two lower fork arms are arranged on the lower support arm (330), and a lower fork opening (33) is arranged between the two lower fork arms. The lower fork opening (33) is in communication with the first wire-passing channel (323). A fourth hinge shaft (335) is supported in the lower fork opening (33). Branches of the second traction wire (620) passing through the first wire-passing channel (323) bypass the fourth hinge shaft (335) and then extend to the needle feeding assembly (400). The two outer extending ends of the fourth hinge shaft (335) are respectively hinged to the second ends of the two inclined support arms (311) of the inclined support arm assembly (310).

11. The abdominal puncture suture device according to claim 4, wherein, Both ends of the second hinge shaft (321) are in sliding cooperation with the limiting sliding grooves (140) on the inner wall of the sleeve (100); A support frame (230) is provided at the distal end of the core rod (200). Both side portions of the bottom wall of the support frame (230) support the side walls, and an installation groove (210) is formed between the two side walls; The arm length of the upper support arm (320) is less than that of the lower support arm (330); A limiting portion (121) is formed on the lower side wall of the side hole (120) for limiting the rotation angle of the lower support arm (330).

12. The abdominal puncture suture device according to claim 7, wherein The first insertion portion (550) is a slot, and the slot extends axially and is in communication with the wire passing hole (540); Alternatively, the piercing and mating portion (710) is made of rubber, elastic plastic or fabric.

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