A suture device for closing blood vessels during catheter surgery

Abstract

The present invention provides a suturing device for closing blood vessels in catheter surgery, which includes a push handle assembly, a main body assembly and a proximal catheter assembly from back to front, wherein the push handle assembly includes a front needle and a rear needle assembly of a front and rear needle fixing member, and the front and rear needle fixing members can drive the front needle and the rear needle assembly to move forward and backward; the main body assembly includes a housing, a wrench and a control handle connecting rod, the control handle connecting rod is arranged in the housing, one end of the wrench inserted into the housing is connected to the control handle connecting rod, the front and rear needle fixing members are movably connected to the wrench, and a thread foot control needle is connected to the control handle connecting rod; the proximal catheter assembly is provided with a channel, a thread foot is provided at the front end of the channel, and a front needle needle sleeve and a rear needle needle sleeve are provided at both ends of the thread foot, and the thread foot control needle is connected to the thread foot, and the thread foot control needle is driven to move forward and backward by the rotation of the wrench to drive the thread foot to rotate relative to the channel, so that the front needle corresponds to the front needle needle sleeve, and the rear needle assembly is connected to the rear needle needle sleeve. The present invention can quickly suture a vascular wound, accelerate the healing time, and reduce the patient's bed rest time.

Description

Technical Field

[0001] The present invention relates to the technical field of suturing devices, and in particular to a suturing device for closing blood vessels in catheter surgery. Background Art

[0002] With the rapid development of medical interventional technology, its application in various types of surgical patients in hospitals has become increasingly extensive. With the continuous improvement and maturity of interventional treatment technology, various types of medical interventional equipment have been comprehensively upgraded in accordance with the requirements of treatment, making interventional surgery less harmful to patients and better meeting the requirements of surgical patients for treatment comfort. Since interventional surgery is to make an incision on the arteries and veins of the human body to allow the interventional equipment to enter the human body through the blood vessels, the surgical site to be reached, with the increasing complexity of high-tech interventional surgical medical devices, the sheaths used in many clinical patients have a diameter greater than 6F ("F" is the abbreviation of the catheter unit "French", which describes the circumference of the catheter). Traditional press-type hemostasis can no longer meet the requirements of surgery, and medical rehabilitation of large vascular wounds has gradually become a problem that causes medical risks. Summary of the invention

[0003] The purpose of the present invention is to provide a suturing device for closing blood vessels in catheter surgery, which can replace traditional manual and mechanical compression hemostasis, quickly sew up blood vessel wounds, accelerate healing time, and reduce the patient's bed rest time.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a suturing device for closing a blood vessel during a catheter operation, which comprises, from back to front, a push handle assembly, a main body assembly and a proximal catheter assembly, the push handle assembly comprising front and rear needle fixing parts, a front needle and a rear needle assembly, the front needle and the rear needle assembly are respectively fixed on the front and rear needle fixing parts extending in the front and rear directions, the front needle and the rear needle assembly are driven to move forward and backward by the front and rear needle fixing parts, the rear needle assembly comprises a rear needle needle head and a rear needle tube, the rear needle head and the rear needle tube are detachably connected; the main body assembly comprises a shell, a wrench and a control handle connecting rod, a accommodating chamber is provided in the shell, the control handle connecting rod is provided in the accommodating chamber, the first end of the wrench is located in the accommodating chamber and is connected to the control handle connecting rod, the second end of the wrench is located outside the accommodating chamber, and the second end of the wrench is located outside the accommodating chamber. The two ends can rotate around their own first ends relative to the shell body, and the front and rear needle fixing parts are movably connected to the first end of the wrench, and the front needle and rear needle assemblies extend forward through the accommodating cavity, and a thread foot control needle is connected to the control handle connecting rod, and the thread foot control needle passes through the accommodating cavity and extends forward; the proximal catheter assembly is provided with a channel for the front needle, the rear needle assembly and the thread foot control needle to pass through, and a thread foot, a front needle needle sleeve and a rear needle needle sleeve are provided at the front end of the channel, and the front needle needle sleeve and the rear needle sleeve are respectively arranged at both ends of the thread foot, and the thread foot control needle is connected to the thread foot and is located between the front needle needle sleeve and the rear needle sleeve, and the thread foot control needle is driven to move forward and backward by the rotation of the wrench, so as to drive the thread foot to rotate around its own middle part relative to the channel, so that the front needle can be connected to the front needle needle sleeve, and the rear needle needle head can be connected to the rear needle sleeve.

[0005] It can be seen from the above scheme that by setting the wrench to rotate relative to the housing, the thread foot rotates and unfolds, so that the front needle sleeve and the rear needle sleeve are exposed to the outside; by setting a push handle assembly, it is used to move the front needle and the rear needle assembly toward the needle sleeve, so that the front needle is fixedly connected to the front needle sleeve, and the rear needle needle head is fixedly connected to the rear needle sleeve; a connecting line is pre-connected between the front needle sleeve and the rear needle sleeve, the front needle needle head is preset with a fisherman's knot, and the rear needle needle head is pre-connected with a suture line, and the front needle and the rear needle assembly are simultaneously pulled out by the push handle assembly, at which time the rear needle is separated from the rear needle tube, and the connecting line and the suture line pass through the fisherman's knot and move toward the patient's body together with the front needle, and then the ligature is tightened by the fisherman's knot to complete a blood vessel suture operation. The present invention can replace traditional manual and mechanical compression hemostasis, quickly suture blood vessel wounds, and has the advantages of simple and convenient operation, high suture accuracy, and good reliability.

[0006] A further solution is that the front needle and the front needle sleeve are fixedly connected by means of snap-fit ​​and / or magnetic attraction; the rear needle head of the rear needle assembly and the rear needle sleeve are fixedly connected by means of snap-fit ​​and / or magnetic attraction.

[0007] It can be seen from the above solutions that by providing a connection structure of snap connection and / or magnetic adsorption, it is beneficial to improve the connection reliability between the needle and the needle cover and avoid the needle falling off phenomenon.

[0008] A further solution is that a ball head is provided at the front end of the front and rear needle fixings; a rotating seat is provided at the first end of the wrench, a first cavity is provided in the rotating seat, the first cavity is provided with two narrow outlets and two wide outlets, the two narrow outlets are arranged opposite to each other, and the two wide outlets are arranged opposite to each other, and in the circumferential direction of the rotating seat, the narrow outlets are connected with the corresponding wide outlets; the ball head is inserted in the first cavity, the front ends of the front and rear needle fixings can move relatively between the narrow outlet and the wide outlet, and the diameter of the ball head is larger than the width of the narrow outlet and smaller than the width of the wide outlet.

[0009] It can be seen from the above scheme that by setting a narrow outlet and a wide outlet, when the front and rear needle fixing parts are inserted in the narrow outlet, the rotating seat plays a locking role to prevent the front and rear needle fixing parts from moving forward and backward; when the front and rear needle fixing parts are inserted in the wide outlet, the rotating seat plays an unlocking role, and the front and rear needle fixing parts can move forward and backward at this time. By setting a locking and unlocking structure, it is helpful to control the position of the front and rear needles and prevent the front and rear needles from accidentally extending out and scratching the patient's body, which has the advantage of high safety.

[0010] A further solution is that a connector is provided at the rear end of the control handle connecting rod, the connector is connected to the rotating seat, and the rotation center of the connector and the rotating seat are eccentrically arranged.

[0011] It can be seen from the above scheme that through the eccentric setting of the rotation center of the connecting head and the rotating seat, when the wrench rotates, the control handle connecting rod can be driven by the connecting head to move a preset distance to the rear end, so as to drive the thread foot control needle to move backward, so as to drive the thread foot to rotate. The rotation of the thread foot can be controlled while unlocking the front and rear needle fixings by the wrench, which is conducive to streamlining the structure and saving operation time.

[0012] A further solution is that a second cavity is provided at the front end of the control handle connecting rod, a control needle handle and a first elastic member are provided in the second cavity, the thread pin control needle is fixedly connected to the control needle handle, and the first elastic member elastically abuts between the control needle handle and the front cavity wall of the second cavity.

[0013] It can be seen from the above scheme that by setting the first elastic member, it is beneficial to buffer the force acting on the control needle handle when the wrench rotates, that is, to buffer the force acting on the thread foot control needle, and prevent the thread foot control needle from suddenly applying a large force to the thread foot, causing the thread foot to rotate too fast or excessively, causing damage to the blood vessel.

[0014] A further solution is that the push handle assembly also includes a push handle and a needle handle connecting piece, a third cavity is provided in the needle handle connecting piece, a cavity wall of the third cavity is provided with a card slot, the push handle portion is inserted into the third cavity, a buckle is provided in the middle of the push handle, the buckle is connected with the card slot, a connecting part is provided at the rear end of the front and rear needle fixing parts, the connecting part is provided in the third cavity, a second elastic part is also provided in the third cavity, and the second elastic part elastically abuts between the connecting part and the front end of the push handle.

[0015] It can be seen from the above scheme that by setting the second elastic member, the buckle of the push handle is always in contact with the rear groove wall of the slot, which is beneficial to improve the tightness of the connection between the push handle and the needle handle connecting piece, so that when the push handle moves forward and backward, it can drive the needle handle connecting piece to move synchronously at the first time.

[0016] A further solution is that the rear needle assembly includes a rear needle needle head, a rear needle tube and a push shaft, the rear needle needle head is detachably arranged at the front end of the rear needle tube, the rear needle needle head is used to connect with the suture thread, and the push shaft is movably inserted in the rear needle tube; the rear end of the front needle and the rear end of the rear needle tube are respectively fixedly connected to the front and rear needle fixing parts, and the rear end of the push shaft is fixedly connected to the push handle.

[0017] It can be seen from the above scheme that by setting a detachable connection between the rear needle head and the rear needle tube, when the push handle moves forward, the rear needle head is pushed forward by the pushing shaft and separated from the rear needle tube, which is conducive to the rear needle head being able to be quickly separated from the rear needle tube when the rear needle head is fixedly connected to the rear needle sleeve.

[0018] A further solution is that the proximal catheter assembly includes a guide sleeve, a left guide tube and a right guide tube, the left guide tube and the right guide tube are cooperatively arranged in the guide sleeve, the front ends of the left guide tube and the right guide tube protrude from the guide sleeve and are provided with a bending portion, a fourth cavity is penetrated through the bending portion, a wire foot is provided in the fourth cavity, and a wire accommodating groove is provided at the front end of the bending portion; the guide sleeve is respectively provided with a front needle opening and a rear needle opening on both sides of the opening of the fourth cavity.

[0019] It can be seen from the above scheme that by providing a curved portion, the front and rear needles can correspond to the needle sleeves on both ends of the thread leg, which is conducive to achieving a fixed connection between the needle and the needle sleeve; by providing an opening, it is conducive to reserving a rotation space for the thread leg, making it convenient for the end of the thread leg to extend out of the curved portion, which is conducive to making the end of the thread leg closely fit against the inner wall of the blood vessel, thereby playing a role in temporarily stopping bleeding.

[0020] A further solution is that a front needle tunnel, a rear needle tunnel and a control needle tunnel are arranged between the left guide tube and the right guide tube, and the left guide tube is provided with a front needle suture tunnel and a rear needle suture tunnel extending along the front-to-back direction; the right guide tube is provided with a marking cavity catheter extending along the front-to-back direction, and a marking entrance is arranged at the front end of the right guide tube, and the marking entrance is located outside the guide sleeve, and in the front-to-back direction, the marking entrance is closer to the stitch foot than the front needle opening and the rear needle opening; a fixed cavity catheter is arranged in the shell, and the fixed cavity catheter is connected with the marking cavity catheter, and the marking cavity catheter is respectively connected with the marking entrance and the fixed cavity catheter.

[0021] It can be seen from the above scheme that by setting up respective tunnels, it is convenient to separate the front and rear needles and the control needle, which is beneficial to ensure the smoothness of the forward and backward movement of each needle; by setting up a marking inlet and a marking cavity catheter, when the guide tube is inserted to the position where suturing is required, the blood flowing out of the blood vessel flows from the marking inlet to the marking cavity catheter, which is beneficial for medical staff to judge whether the suturing position has been reached.

[0022] A further solution is that the suturing device also includes a distal catheter assembly, which is connected to the front end of the proximal catheter assembly, and the distal catheter assembly includes a sheath, a reinforcement tube and a hemostatic valve; the reinforcement tube and the hemostatic valve are both arranged in the sheath, the hemostatic valve is located at the front end of the reinforcement tube, and the sheath is provided with a steel wire inlet at the rear end of the reinforcement tube, and the steel wire inlet is connected to the reinforcement tube.

[0023] It can be seen from the above scheme that by providing a sheath tube, the guide wire can be inserted into the reinforcement tube, which is convenient for guiding the suturing device to move in the patient's body through the guide wire, and is conducive to quickly and accurately reaching the position where suturing is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0025] Figure 2 is an exploded view of an embodiment of the present invention.

[0026] Figure 3 It is a structural diagram of the main skeleton components from the first perspective in an embodiment of the present invention.

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 It is a structural diagram of the main skeleton components from a second viewing angle in an embodiment of the present invention.

[0029] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0030] Figure 7 It is a cross-sectional view of the main skeleton components along the front-to-back direction in an embodiment of the present invention.

[0031] Figure 8 yes Figure 7 Enlarged view of point C in the middle.

[0032] Fig. 9 yes Figure 7 Enlarged view of point D in the middle.

[0033] Fig.10 yes Figure 7 Enlarged view of point E in the middle.

[0034] Fig.11 yes Figure 7 Enlarged view of point F in the middle.

[0035] Fig.12 is an exploded view of the proximal catheter assembly in an embodiment of the present invention.

[0036] Fig.13 yes Fig.12 Enlarged view of point G in the middle.

[0037] Fig.14 It is a structural diagram of the curved portion in the proximal catheter assembly of an embodiment of the present invention from a first perspective.

[0038] Fig.15 It is a structural diagram of the curved portion in the proximal catheter assembly according to an embodiment of the present invention from a second viewing angle.

[0039] Fig.16 It is a cross-sectional view of the proximal catheter assembly in the left-right direction according to an embodiment of the present invention.

[0040] Fig.17 It is a schematic diagram of the connection between the stitches and the front and rear needles of an embodiment of the present invention.

[0041] Fig.18 It is a cross-sectional view of the distal catheter assembly along the front-to-back direction according to an embodiment of the present invention.

[0042] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0043] See also Figure 1 , Figure 2 and Fig.11 The suturing device provided in this embodiment is mainly used to close blood vessels in catheter surgery. The suturing device includes, from back to front, a push handle assembly 2, a main assembly 1, a proximal catheter assembly 3, and a distal catheter assembly 4. In this embodiment, the end of the suturing device that enters the patient's body is the front end, and the end outside the patient's body is the rear end.

[0044] The main assembly 1 includes a housing, a wrench 13 and a control handle connecting rod 14. The housing includes an upper housing 11, a lower housing 12 and a locking sleeve 18. The upper housing 11 and the lower housing 12 are arranged in cooperation and fixed by the locking sleeve 18. An accommodating cavity is arranged between the upper housing 11 and the lower housing 12 along the front-to-back direction, and the control handle connecting rod 14 is arranged in the accommodating cavity. The first end of the wrench 13 is located at the rear end of the accommodating cavity and connected to the rear end of the control handle connecting rod 14. The second end of the wrench 13 is located outside the accommodating cavity. The second end of the wrench 13 can rotate relative to the housing around its own first end, that is, the wrench 13 can flip relative to the housing along the front-to-back direction. The upper shell 11 is symmetrically provided with two handle portions 111 at its rear end, and an elastic pressing portion 112 and a shearing piece 113 are provided at its front end. An installation groove is provided between the elastic pressing portion 112 and the upper shell 11, and a notch is provided in the installation groove toward the front, that is, a notch is provided toward one end of the proximal catheter assembly 3. The shearing piece 113 is provided in the installation groove, and the shearing piece 113 is controlled to cut the suture by pressing the elastic pressing portion 112 up and down.

[0045] The push handle assembly 2 includes a push handle 21, a needle handle connector 22, a front and rear needle fixing member 23, a front needle 24 and a rear needle assembly. The push handle 21 is connected to the rear end of the needle handle connector 22, the front and rear needle fixing member 23 is fixedly connected to the front end of the needle handle connector 22, the front needle 24 and the rear needle assembly are respectively fixed to the front end of the front and rear needle fixing member 23 extending in the front and rear directions, and the front needle 24 and the rear needle assembly are simultaneously driven to move in the front and rear directions through the front and rear needle fixing member 23. The front end of the front and rear needle fixing member 23 is movably connected to the first end of the wrench 13, and the front needle 24 and the rear needle assembly pass through the control handle connecting rod 14 and extend toward the proximal catheter assembly 3. The control handle connecting rod is also connected to a thread foot control needle 28 extending in the front and rear directions at its rear end, the thread foot control needle 28 is located between the front needle 24 and the rear needle assembly, and the thread foot control needle 28 passes through the accommodating cavity and extends toward the proximal catheter assembly 3.

[0046] A passage for the front needle 24, the rear needle assembly and the thread pin 31 to control the passage is provided in the proximal catheter assembly 3. The thread pin 31, the front needle needle sleeve 32 and the rear needle needle sleeve 33 are provided at the front end of the passage, and the front needle needle sleeve 32 and the rear needle needle sleeve 33 are respectively provided at the two ends of the thread pin 31. The front end of the thread pin control needle 28 is connected to the thread pin 31, and is used to control the thread pin 31 to rotate around its own middle relative to the passage at a preset angle, so that the front needle sleeve 32 and the rear needle sleeve 33 on the two ends of the thread pin 31 protrude out of the passage, so that the front needle 24 is aligned with the front needle sleeve 32, and the rear needle needle head 27 of the rear needle assembly is aligned with the rear needle sleeve 33.

[0047] One end of the distal catheter assembly 4 close to the proximal catheter assembly 3 is provided with a wire inlet 411 for inserting a guide wire, so as to guide the suturing device to move to the position where the blood vessel needs to be sutured through the guide wire.

[0048] See also Figures 3 to 6, the wrench 13 is provided with a rotating seat 131 at its first end along a direction perpendicular to the front-to-back direction, and the wrench 13 rotates around the axis of the rotating seat 131. A first cavity is provided in the rotating seat 131, and the first cavity is provided with two narrow outlets 1311 and two wide outlets 1312. The two narrow outlets 1311 are arranged opposite to each other and connected along the radial direction of the rotating seat 131, and the two wide outlets 1312 are arranged opposite to each other and connected along the radial direction of the rotating seat 131. In the circumferential direction of the rotating seat 131, one narrow outlet 1311 is connected to an adjacent wide outlet 1312, and another narrow outlet 1311 is connected to another narrow outlet. The front ends of the front and rear needle fixing members 23 are inserted in the first cavity, and the front needle 24 and the rear needle assembly both pass through the first cavity.

[0049] The front end of the front and rear needle fixing member 23 is provided with a clamping portion 231 and a ball head 232. The clamping portion 231 is a flat structure, and the ball head 232 is located at the front end of the clamping portion 231. The thickness of the clamping portion 231 is less than the width of the narrow outlet 1311, and the diameter of the ball head 232 is greater than the width of the narrow outlet 1311, so that the clamping portion 231 can be clamped in the narrow outlet 1311 and cannot be separated from the rotating seat 131; the diameter of the ball head 232 is less than the width of the wide outlet 1312, so that the front end of the front and rear needle fixing member 23 can pass through the wide outlet 1312 in the front-to-back direction. The front end of the front and rear needle fixing parts 23 can move relatively between the narrow outlet 1311 and the wide outlet 1312. When the second end of the wrench 13 is close to the front end side wall of the shell, the front end of the front and rear needle fixing parts 23 is clamped in the narrow outlet 1311. At this time, the front and rear needle fixing parts 23 cannot move in the front and rear directions, thereby achieving a locking effect; when the second end of the wrench 13 is flipped toward the rear end of the shell at a preset angle, the front end of the front and rear needle fixing parts 23 is located in the wide outlet 1312. At this time, the front and rear needle fixing parts 23 can move in the front and rear directions, thereby achieving an unlocking effect.

[0050] See also Figure 7 and Figure 8 , and combined with Figure 5 , the rear end of the control handle connecting rod 14 is provided with two connecting arms 141, and the rear end of the connecting arm 141 is provided with a connecting head 142. The rotating seat 131 is provided with eccentric mounting grooves on both sides of the first cavity, and the rear end of the connecting arm 141 is inserted into the eccentric mounting groove, and the connecting head 142 is eccentrically arranged with respect to the rotation center of the rotating seat 131, that is, the connecting head 142 is located on the front side of the axis of the rotating seat 131. When the wrench 13 rotates backward, it drives the control handle connecting rod 14 to move slightly backward in the front-to-back direction, so as to drive the thread foot control pin 28 to move slightly backward, thereby pulling the thread foot 31 to unfold.

[0051] Combination Figure 6 and Figure 8The front end of the control handle connecting rod 14 is provided with a second cavity, and the control needle handle 15 and the first elastic member 16 are provided in the second cavity. The front needle 24 and the rear needle assembly pass through the control needle handle 15 and the first elastic member 16, and the rear end of the thread pin control needle 28 is fixedly connected to the control needle handle 15. The first elastic member 16 elastically abuts between the front end of the control needle handle 15 and the front cavity wall of the second cavity, and plays a role in buffering the force acting on the thread pin control needle 28.

[0052] See also Fig. 9 and Fig.10 The push handle assembly 2 includes a push handle 21 and a needle handle connector 22. A third cavity is provided in the needle handle connector 22, and two slots 221 are symmetrically provided on the rear end wall of the third cavity; the push handle 21 is partially inserted in the third cavity, and a buckle 211 matching the slot 221 is provided in the middle of the push handle 21, and the push handle 21 and the needle handle connector 22 are fixedly connected by connecting the buckle 211 with the slot 221. A connecting portion 233 is provided at the rear end of the front and rear needle fixing members 23, and the connecting portion 233 is inserted in the third cavity. A second elastic member 222 is also provided in the third cavity, and the second elastic member 222 elastically abuts between the connecting portion 233 and the front end of the push handle 21.

[0053] The rear end of the front needle 24 is fixed in the connecting portion 233. The rear needle assembly includes a rear needle head 27, a rear needle tube 25 and a push shaft 26. The rear end of the rear needle tube 25 is fixed in the connecting portion 233, and the rear needle head 27 is detachably arranged at the front end of the rear needle tube 25, and the rear needle head 27 is used to connect with the suture thread. In the front-to-back direction, the needle head of the front needle 24 is closer to the thread foot 31 than the rear needle head 27. The push shaft 26 is movably inserted in the rear needle tube 25 along the front-to-back direction, and is used to push the rear needle head 27 to move forward and separate from the rear needle tube 25. The rear end of the push shaft 26 passes through the connecting portion 233 and is fixedly connected in the push handle 21. When the push handle 21 drives the front needle 24 and the rear needle assembly to move forward together, so that the front needle 24 is inserted into the front needle sleeve 32, when the medical staff fails to withdraw the forward pushing force in time, or the forward pushing force is too large, the second elastic member 222 can slow down the backward force of the needle sleeve on the front needle 24, play the role of reducing pressure and offsetting force, and avoid excessive force causing harm to the patient.

[0054] The front needle 24 and the rear needle head 27 of the rear needle assembly are fixedly connected by means of snap connection and / or magnetic adsorption. In this embodiment, the connection is preferably fixedly connected by means of both snap connection and strong magnetic adsorption. Specifically, a connection groove is provided in the needle sleeve, and barbs that match the connection groove are provided on the front needle 24 and the rear needle head 27. The front needle sleeve 32 and the rear needle sleeve 33 are made of magnetic materials, and the front needle 24 and the rear needle head 27 are strongly magnetically adsorbed to the needle sleeve.

[0055] See also Figures 12 to 15The proximal catheter assembly 3 includes a guide sleeve 34, a left guide tube 35 and a right guide tube 36. The left guide sleeve and the right guide sleeve are arranged in cooperation in the guide sleeve 34. The front ends of the left guide tube 35 and the right guide sleeve protrude from the guide sleeve 34, and a curved portion 37 is arranged at the protruding portion. The curved portion 37 protrudes downward to cooperate with the suturing operation of the medical staff. A fourth cavity is arranged through the curved portion 37, and a supporting portion 371 is arranged in the fourth cavity. The stitch foot 31 is arranged in the fourth cavity, and a groove 311 cooperating with the supporting portion 371 is arranged on the foot. The groove 311 is located on the side facing away from the stitch foot control needle 28, so that the stitch foot 31 can rotate on the supporting portion 371 to realize the expansion and retraction of the two ends of the stitch foot 31. The bending portion 37 is provided with a wire receiving groove 372 at the front end of the fourth cavity for accommodating the connecting wire 5 and the suture wire to pass through. The wire receiving groove 372 is provided with an opening toward the raised side of the bending portion 37. The bending portion 37 is provided with an elastic ring 373 at the opening for limiting the connecting wire 5 or the suture wire from escaping from the wire receiving groove 372.

[0056] The guide sleeve 34 is respectively provided with a front needle opening 341 and a rear needle opening 342 on both sides of the fourth cavity opening, so that the front needle 24 can pass through the guide sleeve 34 from the front needle 24 hole and connect with the front needle needle sleeve 32, and the rear needle needle head 27 passes through the rear needle opening 342 and connects with the rear needle needle sleeve 33 under the action of the pushing shaft 26.

[0057] A marking lumen catheter 361 is provided in the right guiding tube 36 extending in the front-to-back direction. A marking inlet 362 communicating with the marking lumen catheter 361 is provided at the rear end of the curved portion 37 of the right guiding tube 36. The marking inlet 362 is located outside the guide sleeve 34, and in the front-to-back direction, the marking inlet 362 is closer to the stitch foot 31 than the front needle opening 341 and the rear needle opening 342. When the curved portion 37 reaches the position where the blood vessel needs to be sutured, the blood flowing out of the blood vessel automatically enters the marking lumen catheter 361 from the marking inlet 362 under the action of pressure.

[0058] A fixed lumen catheter 17 is disposed in the housing, one end of which is connected to the marking lumen catheter 361, and the other end of which is located outside the housing. The marking lumen catheter 361 is connected to the marking inlet 362 and the fixed lumen catheter 17, respectively, and blood flows out of the suturing device, which facilitates medical personnel to quickly determine whether the stitches 31 have reached the position of the blood vessel to be sutured, that is, if blood flows out of the fixed lumen catheter 17, it means that the target position has been reached.

[0059] See also Fig.16A front needle tunnel 351, a rear needle tunnel 352 and a needle control tunnel 353 are provided between the left indexing tube 35 and the right indexing tube 36, and the front needle tunnel 351, the rear needle tunnel 352 and the needle control tunnel 353 are provided in parallel. The left indexing tube 35 is provided with a front needle suture tunnel 354 and a rear needle suture tunnel 355 extending in the front-to-back direction, and the front needle suture tunnel 354 and the rear needle suture tunnel 355 are connected to each other at their rear ends.

[0060] See also Fig.17 The suture is pre-set with a fisherman's knot on the front needle 24, the suture extends backward through the front needle tunnel 351 and enters the rear needle tunnel 352 from the rear end, and then the suture extends forward and is connected to the rear needle head 27. A connecting line 5 is pre-connected between the front needle sleeve 32 and the rear needle sleeve 33.

[0061] First, the thread leg 31 enters the blood vessel from the wound, and the wrench 13 is rotated to expand the thread leg 31 according to a preset angle. At this time, the two ends of the thread leg 31 are blocked on the blood vessel walls on both sides of the wound to temporarily stop bleeding; then, the push handle 21 is moved forward to make the front needle 24 and the rear needle needle head 27 pass through the blood vessel wall and are inserted into the corresponding needle sleeve; then, the rear needle needle head 27 is separated from the rear needle tube 25; then, the front needle 24 and the rear needle tube 25 are pulled out by the push handle 21, and the front needle 24 drives the rear needle needle head 27 and the suture thread through the thread receiving groove 372 through the connecting line 5, passes through the blood vessel and the fisherman's knot, and then moves out of the patient's body, and finally is tied tightly with a fisherman's knot.

[0062] See also Fig.18 The distal catheter assembly 4 includes a sheath tube 41, a reinforcement tube 42 and a hemostatic valve 43. The reinforcement tube 42 and the hemostatic valve 43 are both located in the sheath tube 41, and the hemostatic valve 43 is located at the front end of the reinforcement tube 42. The sheath tube 41 is provided with a steel wire inlet 411 for inserting a guide steel wire at the rear end of the reinforcement tube 42, and the steel wire inlet 411 is communicated with the reinforcement tube 42.

[0063] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A suturing device for closing a blood vessel during a catheter operation, characterized in that: From back to front, it includes the push handle assembly, the main body assembly, and the proximal catheter assembly: The push handle assembly includes front and rear needle fixing parts, a front needle and a rear needle assembly, wherein the front needle and the rear needle assembly are respectively fixed on the front and rear needle fixing parts along the front and rear directions, and the front and rear needle fixing parts drive the front needle and the rear needle assembly to move forward and backward, and the rear needle assembly includes a rear needle head, a rear needle tube and a push shaft, wherein the rear needle head is detachably connected to the rear needle tube, and the push shaft is movably inserted in the rear needle tube, and is used to push the rear needle head to move forward; The main body component comprises a shell, a wrench and a control handle connecting rod, the shell is provided with a accommodating cavity, the control handle connecting rod is arranged in the accommodating cavity, the first end of the wrench is located in the accommodating cavity and connected to the control handle connecting rod, the second end of the wrench is located outside the accommodating cavity, the second end of the wrench can rotate relative to the shell around its own first end, the front and rear needle fixing parts are movably connected with the first end of the wrench, the front needle and the rear needle assembly pass through the accommodating cavity and extend forward, the control handle connecting rod is connected with a thread foot control needle, the thread foot control needle passes through the accommodating cavity and extends forward; The proximal catheter assembly is provided with a channel for the front needle, the rear needle assembly and the thread foot control needle to pass through, and a thread foot, a front needle needle sleeve and a rear needle needle sleeve are provided at the front end of the channel, the front needle needle sleeve and the rear needle needle sleeve are respectively provided at two ends of the thread foot, a connecting line is connected between the front needle needle sleeve and the rear needle sleeve, the thread foot control needle is connected to the thread foot and is located between the front needle needle sleeve and the rear needle sleeve, and the thread foot control needle is driven to move forward and backward by the rotation of the wrench, so as to drive the thread foot to rotate around its own middle part relative to the channel, so that the front needle can be connected to the front needle needle sleeve, and the rear needle needle head can be connected to the rear needle sleeve.

2. The suturing device according to claim 1, characterized in that: The front needle and the front needle sleeve are fixedly connected by means of snap connection and / or magnetic attraction; the rear needle head of the rear needle assembly is fixedly connected to the rear needle sleeve by means of snap connection and / or magnetic attraction.

3. The suturing device according to claim 1, characterized in that: The front ends of the front and rear needle fixing members are provided with ball heads; The first end of the wrench is provided with a rotating seat, a first cavity is provided in the rotating seat, the first cavity is provided with two narrow outlets and two wide outlets, the two narrow outlets are arranged opposite to each other, the two wide outlets are arranged opposite to each other, and in the circumferential direction of the rotating seat, the narrow outlets are communicated with the corresponding wide outlets; The ball head is inserted in the first cavity, the front ends of the front and rear needle fixing parts can move relatively between the narrow outlet and the wide outlet, and the diameter of the ball head is larger than the width of the narrow outlet and smaller than the width of the wide outlet.

4. The suturing device according to claim 3, characterized in that: A connecting head is arranged at the rear end of the control handle connecting rod, the connecting head is connected to the rotating seat, and the rotating center of the connecting head and the rotating seat is eccentrically arranged.

5. The suturing device according to claim 4, characterized in that: A second cavity is provided at the front end of the control handle connecting rod, a control needle handle and a first elastic member are provided in the second cavity, the thread pin control needle is fixedly connected to the control needle handle, and the first elastic member elastically abuts between the control needle handle and the front cavity wall of the second cavity.

6. The suturing device according to any one of claims 1 to 5, characterized in that: The push handle assembly also includes a push handle and a needle handle connecting piece, a third cavity is provided in the needle handle connecting piece, a cavity wall of the third cavity is provided with a card slot, the push handle portion is inserted into the third cavity, a buckle is provided in the middle of the push handle, the buckle is matched and connected with the card slot, a connecting part is provided at the rear end of the front and rear needle fixing parts, the connecting part is provided in the third cavity, and a second elastic part is also provided in the third cavity, and the second elastic part elastically abuts between the connecting part and the front end of the push handle.

7. The suturing device according to claim 6, characterized in that: The rear ends of the front needle and the rear end of the rear needle tube are respectively fixedly connected to the front and rear needle fixing members, and the rear end of the pushing shaft is fixedly connected to the pushing handle.

8. The suturing device according to any one of claims 1 to 5, characterized in that: The proximal catheter assembly comprises a guide sleeve, a left guide tube and a right guide tube, wherein the left guide tube and the right guide tube are arranged in cooperation in the guide sleeve, the front ends of the left guide tube and the right guide tube protrude from the guide sleeve and are provided with a curved portion, a fourth cavity is provided through the curved portion, the wire foot is provided in the fourth cavity, and the curved portion is provided with a wire receiving groove at the front end of the fourth cavity; The guide sleeve is provided with a front needle opening and a rear needle opening on both sides of the fourth cavity opening.

9. The suturing device according to claim 8, characterized in that: A front needle tunnel, a rear needle tunnel and a needle control tunnel are provided between the left guiding tube and the right guiding tube, and a front needle suture tunnel and a rear needle suture tunnel are provided on the left guiding tube extending along the front-to-back direction; The right guiding tube is provided with a marking cavity catheter extending in the front-to-back direction, and a marking inlet is provided at the front end of the right guiding tube. The marking inlet is located outside the guiding sleeve, and in the front-to-back direction, the marking inlet is closer to the stitch foot than the front needle opening and the rear needle opening; A fixed cavity conduit is arranged in the shell, the fixed cavity conduit is communicated with the marking cavity conduit, and the marking cavity conduit is communicated with the marking inlet and the fixed cavity conduit respectively.

10. The suturing device according to any one of claims 1 to 5, characterized in that: The suturing device also includes a distal catheter assembly, which is connected to the front end of the proximal catheter assembly, and includes a sheath tube, a reinforcement tube and a hemostatic valve; The reinforcing tube and the hemostatic valve are both arranged in the sheath tube. The hemostatic valve is located at the front end of the reinforcing tube. The sheath tube is provided with a steel wire inlet at the rear end of the reinforcing tube. The steel wire inlet is communicated with the reinforcing tube.

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