Vascular tissue ligator and ligature system

Abstract

The present application belongs to the technical field of medical devices, and particularly relates to a blood vessel tissue ligator and a ligature ligature system. The ligature has a connecting tendon which can be pulled off under the action of external force to achieve the purpose of separating the bundling part and the traction part, and the excess part is convenient to remove. The feeding mechanism of the blood vessel tissue ligator can automatically feed the ligature, and push the ligature into the ligature guiding mechanism. The guiding passage of the ligature guiding mechanism guides the ligature to form a sleeving circle around the blood vessel. The push head is inserted into the accommodating space between the two guide claws to make the center position of the sleeving circle deviate slightly. The traction mechanism tightens the ligature to complete the ligation of the blood vessel. Finally, the connecting tendon is pulled off to make the traction part separate from the bundling part. The present application can automatically feed the ligature, reduce the damage to the blood vessel and the surrounding tissue during the blood vessel ligation, and has high efficiency, good effect and high safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a blood vessel tissue ligator and a ligature band ligature system. BACKGROUND

[0002] With the progress of medical technology and people's concept, surgical operation gradually tends to be minimally invasive. Compared with the conventional operation, minimally invasive operation causes the least trauma to patients as far as possible, which includes medical structure and psychology. Since minimally invasive operation causes little trauma, patients suffer less pain, the body is less damaged, and the recovery is fast, so it effectively reduces and avoids iatrogenic trauma and complications left by traditional surgical operation.

[0003] The commonly said "minimally invasive surgery" is essentially to use "endoscope" for operation, or called endoscopic surgery. Compared with traditional open surgery, it has the technical characteristics of small trauma, fast recovery, short hospitalization time, etc. Its essence is the same as the principle of open surgery, but it changes the traditional surgical approach, separation steps, ligation and suture method, and observation method in the operation process from direct visual observation to endoscopic observation.

[0004] Endoscopes are increasingly used in surgery; laparoscopes, thoracoscopes, arthroscopes, cystoscopes, hysteroscopes, and other endoscopic surgeries are bringing benefits to more and more patients. However, blood vessel ligation under various endoscopic surgeries has always been a difficult problem for clinicians. Blood vessel ligation can be achieved by closing the blood vessel with a ligation clip or suturing the blood vessel with a surgical suture. Due to the particularity of minimally invasive surgery, the instruments used in minimally invasive surgery are usually small orifices that penetrate deep into the lesions in the patient's body. With the assistance of an endoscope, the operation space and visibility are limited. When using surgical sutures for blood vessel ligation, complex operations need to be performed on the needle and suture to form the required knot for ligating the blood vessel. The above-mentioned complex operations are time-consuming and require high skills from the surgeon. In contrast, ligation clips are relatively easy and fast to apply. Therefore, the application of ligation clips in endoscopic surgery has increased dramatically, and clip appliers are essential tools for applying ligation clips. By using a clip applier to manipulate a ligation clip, the ligation of fluid conduits in surgical operations can be facilitated. However, ligation clips rely on their own clamping force, which may loosen or fall off due to tissue edema subsiding, blood vessel pulsation, or external force pulling, and there is a risk of displacement. In addition, ligation clips occupy a large space and can cause damage to other tissues after surgery. To improve safety and reduce the potential risks of surgery, the blood vessel ligation band method can also be used to ligate fluid conduits such as blood vessels.

[0005] For example, a kind of minimally invasive surgery blood vessel ligation device disclosed in patent application No. "CN201710567781.6".But it needs to be clamped for each ligation strip when using, and the ligation strip is clamped by the buckle structure, the tail end of the ligation strip is not actually fixed when the tail end of the ligation strip is clamped by the buckle, the ligation strip may be loose when the head end sliding rail structure is deep into the bottom of blood vessel, the small hole of the tail end of the ligation strip is difficult to clamp into the small cylinder after the ligation strip is clamped into the notch of the tail end clamping groove, and it can only be ligated once at a time.Furthermore, it does not design to hide the whole ligation strip and microscissors, etc., when the head end is deep into the bottom of blood vessel, the part of the ligation strip exposed outside the sleeve rod may also cause damage to blood vessels or other tissues;Since the tail end of the ligation strip is clamped on the buckle, the ligation strip is tightened to the tail end of the ligation strip during the ligation process, and the center of the ligation strip wound into a knot moves to the tail end of the ligation strip, which is easy to cause large displacement of blood vessels during the offset process, causing damage to blood vessels. SUMMARY

[0006] To solve the above technical problems, the present application provides a kind of blood vessel tissue ligator and bandage ligation system, which can automatically feed the bandage, reduce the damage to blood vessels and surrounding tissues during blood vessel ligation, realize continuous ligation, and has high blood vessel ligation efficiency, good effect and high safety.

[0007] The present application provides a kind of blood vessel tissue ligator, comprising:

[0008] A shell is provided with a cylinder, and the cylinder has a guide portion inside;

[0009] A bandage guide mechanism is provided at the front end of the cylinder and includes two groups of guide claws that are openable and closable at the front end and have a guide gap at the rear end;When closed, the two groups of guide claws form an accommodation space, and the bandage guide grooves on the two groups of guide claws form a guide channel for the bandage to pass through, and one of the bandage guide grooves is connected to the guide portion;

[0010] A feeding mechanism is used to push the bandage into the guide portion;

[0011] A belt feeding mechanism includes a pusher that can move along the length direction of the guide portion, and the front end of the pusher can extend into the accommodation space through the guide gap;

[0012] A traction mechanism is operatively connected to the end of the bandage and applies a traction force to the end to cause displacement in the tightening direction.

[0013] Further, the bandage guide mechanism further comprises:

[0014] A support is arranged on the inner wall of the front end of the barrel, and the rear end of at least one of the guide claws is hingedly connected to the support and can rotate about the support by the first power device;

[0015] A reset elastic member is arranged at the front end of the support, one end of the reset elastic member abuts against the inner wall of the barrel, and the other end abuts against the outer side of the guide claw.

[0016] Further, the first power device comprises:

[0017] A tightening wheel is arranged in the housing and is driven to rotate by the first rotating mechanism;

[0018] A pull wire is connected at one end to the tightening wheel and at the other end to the outer side wall of the guide claw, and the connection point is located on the front side of the support.

[0019] Further, a flexible sleeve is further arranged on the guide claw, and an opening is arranged on the side of the flexible sleeve close to the accommodation space.

[0020] Further, the feeding mechanism is arranged in the housing and comprises:

[0021] A support plate extends through the feed opening on the barrel to the guide portion on one side,

[0022] A cartridge has two side plates and two end plates, the two end plates are fixed to the support plate, the two side plates are fixed to the two end plates and have a gap with the support plate, and guide plates extend backward on the two side plates, wherein the guide plate close to the barrel side extends through the feed opening to the guide portion;

[0023] A push plate is movably arranged between the support plate and the guide plate, and the push plate is connected to the output end of the linear driving mechanism.

[0024] Further, the push member comprises:

[0025] A push rod is slidably arranged in the guide portion and is moved by the second power device, the front end of the push rod is bent upward to form a limiting step, and the back surface of the limiting step can abut against the limiting block at the front end of the barrel;

[0026] A push head is arranged at the front end of the push rod and is adapted to the locking portion of the cable tie, and the center line of the pushing force of the push head is collinear with the clamping center line of the traction mechanism.

[0027] Further, the second power device comprises:

[0028] A first long rack is arranged on the push rod and located in a rack guide groove on the barrel, the rack guide groove is in communication with the guide portion, and is separated by a limiting convex rib;

[0029] A first driving gear is arranged in the housing and engaged with the first long rack gear, and the first driving gear is connected with the output end of the second rotating mechanism.

[0030] Further, the push head has a through hole for the strap to pass through, and when the push head acts on the strap, the center line of the through hole is collinear with the center line of the locking part of the strap.

[0031] Further, the traction mechanism is located on the upper side of the belt feeding mechanism and includes two rows of ratchets arranged in parallel on a ratchet support, the teeth of the two rows of ratchets together form a clamping surface for the strap, and the two rows of ratchets are synchronously and reversely rotated by a third power device for traction of the strap movement, and the ratchet support is driven to move along the length direction of the cylinder by a fourth power device.

[0032] Further, the third power device includes:

[0033] A transmission gear is arranged on the ratchet and engaged with the transmission gears on the two rows of ratchets;

[0034] A third driving gear is arranged on one of the rows of ratchets and synchronously rotated by a synchronous belt, and one of the third driving gears is fixed with the output end of the third rotating mechanism.

[0035] Further, the fourth power device includes:

[0036] A second long rack gear is arranged on the ratchet support,

[0037] A fourth driving gear is connected with the output end of the fourth rotating mechanism arranged in the housing, and the fourth driving gear is engaged with the second long rack gear.

[0038] Further, the front end of the ratchet support is further provided with a strap puller, the strap puller is provided with a one-way locking hole, the one-way locking hole is located on the same axis as the through hole on the push member, and the outlet of the one-way locking hole corresponds to the gap between the two rows of ratchets.

[0039] Further, the outlet side of the guide channel is provided with a guide piece extending downwardly and away from the containing space.

[0040] The beneficial effects of the present application are as follows:

[0041] The housing and the cylinder in the vascular tissue ligator are used for mounting, supporting and hiding the internal main body structure, the outer surface of the cylinder is smooth to avoid damage to the internal tissue, and the guide part in the cylinder is used for guiding the movement of the strap to accurately enter the strap guiding mechanism.

[0042] The feeding mechanism pushes the cable tie into the guide part to realize automatic feeding without manual clamping of the cable tie by medical staff, so that the operation is simple and convenient and the operation efficiency is improved.

[0043] The belt feeding mechanism can push the cable tie entering the guide part into the cable tie guide mechanism, and cause the bending of the cable tie through the guide channel of the cable tie guide mechanism to form a loop around the blood vessel. In this process, since the front end of the pushing piece of the belt feeding mechanism can extend into the accommodation space through the guide gap, the pushing piece can continuously push the locking part of the cable tie to move towards the blood vessel during the tightening of the cable tie, so that the offset of the center of the loop during the tightening of the cable tie is compensated. During the gradual reduction of the inner diameter of the loop, the cable tie is prevented from being tightened only towards the locking part of the cable tie, so that the center of the loop formed by the cable tie is offset towards the locking part, the blood vessel and the surrounding tissue are excessively offset, the blood vessel wall is torn or the tissue is torn off. At this time, the center of the loop formed by the winding of the cable tie is small or even unchanged, the pulling of the blood vessel and the surrounding tissue is reduced, and the damage to the blood vessel or the tissue is avoided. Moreover, the action of the pushing piece on the locking part of the cable tie can limit the horizontal position of the locking part, so that when the cable tie passes through the locking part and enters the traction mechanism through the through hole on the pushing piece, the cable tie bears the axial tension when the traction mechanism applies the traction force to the cable tie, thereby reducing the lateral scraping force between the cable tie and the locking part. Furthermore, when the cable tie is tightened, the pushing piece extends to the specified position in the accommodation space, and at this time, the pushing piece can also act as a limiting piece to limit the position of the tightened cable tie, so that the position between the tightened loop after the winding of the cable tie and the ligated blood vessel is fixed, and the tightened loop will not move when the traction mechanism continuously applies the traction force to the cable tie, thereby avoiding the pulling of the blood vessel and causing the damage to the blood vessel and the surrounding tissue.

[0044] The cable tie guide mechanism is arranged at the front end of the cylinder, the front ends of the two groups of guide claws are openable and closable to realize clamping or loosening of the blood vessel, and the rear ends of the two guide claws have a guide gap through which the locking part of the cable tie and the front end of the pushing piece can enter the accommodation space. When the two guide claws are closed, the cable guide groove on one of the guide claws is butted against the guide part, so that the cable tie enters the cable guide groove from the guide part, and under the continuous pushing of the pushing piece, the cable tie moves along the guide channel formed by the butt joint of the cable guide grooves on the two guide claws, extends out of the other side of the guide channel and penetrates into the locking part of the cable tie, and forms a loop around the blood vessel.

[0045] The traction mechanism is used for tightening the cable tie, can be operatively connected with the end of the cable tie and apply a traction force to the end of the cable tie. In this process, when the loop gradually shrinks, the pushing piece gradually extends into the accommodation space and approaches the blood vessel, and the cable tie is extruded from the guide channel to cause the loop to shrink and ligate and tighten the blood vessel.

[0046] In summary, the present application can realize automatic feeding of the ligature through cooperation of various mechanisms, and can realize continuous blood vessel ligation operation, save operation time, reduce damage to blood vessels and surrounding tissues during blood vessel ligation, and has high blood vessel ligation efficiency, good effect and high safety.

[0047] The present application also provides a ligature ligation system, comprising the blood vessel tissue ligator and the blood vessel ligature described above,

[0048] The blood vessel ligature is placed in the clip magazine of the feeding mechanism,

[0049] The blood vessel ligature comprises a body and a locking portion, the body has a strip-shaped structure and a clamping groove region extending along the length direction of the body, the body comprises a bundling portion and a traction portion, the opposite ends of the bundling portion and the traction portion have a connecting rib, the connecting rib can be broken by external force, and the locking portion is arranged at one end of the bundling portion away from the traction portion and has a ligature locking hole through which the body is wound.

[0050] The present application has the following beneficial effects: the locking of the ligature during tightening is realized by cooperation of the clamping groove region of the body and the ligature locking hole to one-way lock the tightening ring of the hemostatic ligature, the bundling portion and the traction portion of the body can be broken by the design of the connecting rib on the body, the breaking point of the body is controlled, and then the bundling portion and the traction portion can be separated by external force, when the blood vessel ligature is placed in the clip magazine of the feeding mechanism, the blood vessel ligature is pushed into the guide portion of the cylinder by the feeding mechanism, the blood vessel ligature is sent into the ligature guide mechanism by the belt feeding mechanism, the body is wound on the blood vessel to form a sleeve tightening ring under the action of the ligature guide mechanism, the traction portion enters the traction mechanism after passing through the locking hole of the locking portion, and then the traction portion of the blood vessel ligature is pulled by the traction mechanism to displace in the tightening direction to tighten the sleeve tightening ring. When the traction portion of the blood vessel ligature is continuously pulled, the position of the sleeve tightening ring formed by the ligature is limited by the restriction of the locking portion of the blood vessel ligature by the pushing piece, the force between the traction portion and the locking portion gradually increases and acts on the connecting rib, and the connecting rib is broken, so that the excess part of the blood vessel ligature after blood vessel ligation can be accurately separated.

[0051] The present application will be further described below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 It is a schematic diagram of the three-dimensional structure of the blood vessel tissue ligator of the present application;

[0053] Figure 2 It is a schematic diagram of the three-dimensional structure of the blood vessel tissue ligator of the present application; Figure 1

[0054] Figure 3 It is a schematic diagram of the cross-sectional structure of the blood vessel tissue ligator of the present application; ​

[0055] Figure 4 Detail view of B; Figure 3 Detail view of B;

[0056] Figure 5 Schematic view of the cross-sectional structure of the feeding mechanism of the vascular tissue ligator of the present application;

[0057] Figure 6 Detail view of C; Figure 5 Detail view of C;

[0058] Figure 7 Schematic view of the cross-sectional structure of the traction mechanism of the vascular tissue ligator of the present application;

[0059] Figure 8 Schematic view of the cross-sectional structure of the traction mechanism of the vascular tissue ligator of the present application;

[0060] Figure 9 Schematic view of the cross-sectional structure of the traction mechanism of the vascular tissue ligator of the present application;

[0061] Figure 10 Schematic view of the cross-sectional structure of the traction mechanism of the vascular tissue ligator of the present application;

[0062] In the drawings: 100 - housing, 110 - barrel, 111 - guide portion, 112 - feeding port, 113 - limiting block, 114 - rack guide slot, 115 - limiting convex ridge, 200 - ligature guiding mechanism, 210 - guide claw, 211 - upper guide claw, 212 - lower guide claw, 213 - accommodating space, 214 - guide gap, 215 - ligature guide slot, 216 - guide piece, 220 - support, 230 - reset elastic member, 240 - first power device, 241 - tightening wheel, 242 - first rotating mechanism, 243 - pull wire, 250 - flexible sleeve, 251 - opening, 300 - feeding mechanism, 310 - support plate, 320 - spring clip compartment, 321 - side plate, 322 - end plate, 323 - guide plate, 330 - pushing plate, 340 - linear driving mechanism, 400 - ligature feeding mechanism, 410 - pushing member, 411 - push rod, 412 - limiting step, 413 - push head, 414 - through hole, 420 - second power device, 421 - first long rack, 422 - first driving gear, 423 - second rotating mechanism, 500 - traction mechanism, 510 - ratchet wheel, 520 - third power device, 521 - transmission gear, 522 - third driving gear, 523 - synchronous belt, 524 - third rotating mechanism, 530 - ratchet wheel support, 531 - first long strip plate, 532 - second long strip plate, 540 - fourth power device, 541 - second long rack, 542 - fourth driving gear, 543 - fourth rotating mechanism, 550 - puller, 551 - one-way locking hole;

[0063] 10 - body, 11 - slot area, 12 - bundling part, 13 - traction part, 14 - connecting rib, 15 - guide part, 16 - connecting part, 20 - locking part, 21 - tape locking hole. DETAILED DESCRIPTION

[0064] With reference to the drawings, specific embodiments of the present application will be described in detail.

[0065] With reference to the drawings, specific embodiments of the present application will be described in detail. Figures 1 to 9 The present application provides an embodiment of a vascular tissue ligator.

[0066] A vascular tissue ligator comprises a housing 100, a tape guiding mechanism 200, a feeding mechanism 300, a tape feeding mechanism 400 and a traction mechanism 500. The housing 100 is used to mount and protect the main body part; the tape guiding mechanism 200 is used to guide the movement of the tape, so that the tape body is wound and then inserted into the locking part 20 of the tape itself; the feeding mechanism 300 is used to automatically feed the tape, without the need for medical staff to manually insert the tape, which is simple and convenient to operate and can improve the efficiency of the operation; the tape feeding mechanism 400 is used to feed the tape into the tape guiding mechanism 200; the traction mechanism 500 is used to apply traction to the end of the tape, so that the sleeve ligation ring formed after winding the tape is tightened.

[0067] The housing 100 is provided with a barrel 110. The shape of the housing 100 is not limited, as long as it can support and shield the main body part. The rear end of the housing 100 can be provided with an opening 251 for discharging tape waste. Preferably, the housing 100 has a hand holding part, which is convenient for medical staff to operate. A controller can be provided on the handle to control the movement of each mechanism. The driving structure of each mechanism in the present application can be controlled by a single-chip microcomputer.

[0068] Preferably, the cross section of the barrel 110 is circular or elliptical, which can be composed of two half shells. The outer part is smooth to avoid damage to human tissue when the barrel 110 is inserted into the human body. In the present embodiment, the cross section of the barrel 110 is circular. The barrel 110 and the housing 100 are used to mount and support the internal main body structure, and the structures are designed to be hidden.

[0069] The barrel 110 has a guide part 111 inside. The tape is pushed into the guide part 111 by the feeding mechanism 300. The guide part 111 guides the movement of the tape in the barrel 110, so that it can accurately enter the tape guiding mechanism 200. Further, the guide part 111 is provided on the inner wall of the barrel 110 and is integrally formed with the barrel 110. Preferably, the guide part 111 is a guide groove, the width of which is adapted to the width of the tape.

[0070] The strap guiding mechanism 200 is arranged at the front end of the barrel 110 and includes two groups of guiding claws 210 which are openable at the front end and have guiding gaps 214 at the rear end. The guiding gaps 214 are arranged to allow the locking portion 20 of the strap and the front end of the pushing member 410 to enter the accommodating space 213 through the guiding gaps 214, and the two groups of guiding claws 210 are openable at the front end to clamp or release the blood vessel.

[0071] When closed, the two groups of guiding claws 210 enclose the accommodating space 213 for accommodating the blood vessel or other target objects.

[0072] The strap guide grooves 215 on the two groups of guiding claws 210 are connected to form a guiding channel for the strap to pass through, and one strap guide groove 215 is connected to the guiding portion 111. Further, the outlet side of the guiding channel is provided with a guiding piece 216 extending downwardly and away from the accommodating space 213, which is used to guide the strap into the locking hole of the strap. Under the continuous pushing of the pushing member 410, the strap enters the strap guide groove 215 connected to the guiding portion 111 in the barrel 110, moves along the guiding channel formed by the connection of the strap guide grooves 215 on the two guiding claws 210, and is guided by the guiding channel to extend from the other side of the guiding channel and penetrate into the locking portion of the strap to form a ligation loop around the blood vessel.

[0073] The strap guiding mechanism 200 is arranged at the front end of the barrel 110 and includes two groups of guiding claws 210 which are openable at the front end and have guiding gaps 214 at the rear end. The guiding gaps 214 are arranged to allow the locking portion 20 of the strap and the front end of the pushing member 410 to enter the accommodating space 213 through the guiding gaps 214, and the two groups of guiding claws 210 are openable at the front end to clamp or release the blood vessel.

[0074] Since the front end of the pushing member 410 of the strap feeding mechanism 400 can extend into the accommodating space 213 through the guiding gap 214, the pushing member 410 can continuously push the locking portion of the strap to move towards the blood vessel during the tightening of the strap, and the offset of the center of the ligation loop is compensated when the strap is tightened. That is, during the gradual reduction of the inner diameter of the ligation loop, the strap is prevented from being tightened only towards the locking portion, which causes the center of the ligation loop to deviate towards the locking portion, the blood vessel and the surrounding tissue to deviate excessively, and the blood vessel wall to be torn or the tissue to be torn off. At this time, the center of the ligation loop formed after the strap is wound has a small or even unchanged offset distance, which reduces the pulling of the blood vessel and the surrounding tissue and avoids damage to the blood vessel or the tissue.

[0075] The pushing member 410 acts on the locking portion of the cable to limit the horizontal position of the cable. When the cable is tightened, the pushing member 410 extends into the designated position of the accommodating space 213. At this time, the pushing member 410 also serves as a limiting member to limit the position of the tightened cable, so that the position between the tightened cable and the ligated blood vessel is fixed. When the traction mechanism 500 continuously applies traction to the cable, the tightened cable will not move significantly, thereby avoiding the traction on the blood vessel and causing damage to the blood vessel and surrounding tissue.

[0076] The traction mechanism 500 is operatively connected to the end of the cable and applies traction to the end of the cable to move the end of the cable in the tightening direction. During the traction of the cable by the traction mechanism 500, the loop gradually shrinks, the pushing member 410 gradually extends into the accommodating space 213 and approaches the blood vessel, and the cable is extruded from the guide channel to drive the loop to shrink and ligate and tighten the blood vessel. In this embodiment, the traction mechanism 500 can be connected to the cable by clamping, grabbing or the like, which is not limited herein.

[0077] In some embodiments, a flexible sleeve 250 is further provided, which is sleeved on the guide claw 210. The flexible sleeve 250 is provided with an opening 251 on the side close to the accommodating space 213. Preferably, the inner side of the flexible sleeve 250 is disconnected to form a gap. At this time, the flexible sleeve 250 can be made of flexible material to wrap the guide claw 210, so as to avoid damage to the blood vessel when the two guide claws 210 clamp the blood vessel. When the flexible sleeve 250 is sleeved on the guide claw 210, the flexible sleeve 250 shields the cable guide groove 215 on the guide claw 210. When the two guide claws 210 clamp the blood vessel, the flexible sleeve 250 is not inwardly deformed under the extrusion of the human tissue, so as to ensure the smoothness of the cable guide groove 215. At the same time, the flexible sleeve 250 further limits the movement of the cable when guiding the movement of the cable. The opening 251 on the inner side of the flexible sleeve 250 allows the cable to extrude the flexible sleeve 250 and deform the gap on the flexible sleeve 250 during the tightening of the cable, so that the cable can extrude from the opening 251 to realize the tightening of the cable.

[0078] In some embodiments, the cable guide mechanism 200 further comprises a support 220 and a reset elastic member 230.

[0079] The support 220 is used to support the guide claw 210, and is arranged on the inner wall of the front end of the cylinder 110. The rear end of at least one guide claw 210 is hinged to the support 220 and can rotate around the fulcrum by the first power device 240. The opening and closing of the front end of the guide claw 210 are realized by the rotation of the guide claw 210, so as to realize the clamping or loosening of the blood vessel. Further, the guide claw 210 comprises an upper guide claw 211 and a lower guide claw 212 which are arranged to be openable and closable. The strap guide groove 215 is arranged on the opposite sides of the upper guide claw 211 and the lower guide claw 212. The opening 251 of the flexible sleeve 250 corresponds to the opening 251 of the strap guide groove 215. The position of the lower guide claw 212 is fixed, and the strap guide groove 215 thereon is always in butt joint with the guide part 111. The upper guide claw 211 is hinged to the support 220 and can rotate around the fulcrum.

[0080] Further, the first power device 240 comprises a tightening wheel 241 and a pull wire 243. The tightening wheel 241 is arranged in the shell 100 and is driven to rotate by the first rotating mechanism 242. One end of the pull wire 243 is connected to the tightening wheel 241, and the other end is connected to the outer side wall of the guide claw 210 and the connection point is located on the front side of the support 220. In the embodiment, one end of the pull wire 243 is arranged on the upper guide claw 211. The outer side wall of the upper guide claw 211 is provided with a mounting column which is movably connected to the pull wire 243. The mounting column is located on the side of the reset elastic member 230 away from the support 220. At this time, the rotation of the tightening wheel 241 driven by the first rotating mechanism 242 makes the pull wire 243 wind around or be unwound from the tightening wheel 241, and drives the front end of the upper guide claw 211 to open together with the lower guide claw 212. The first rotating motor can be a stepping motor, a servo motor or a direct current motor, which can be selected according to actual needs.

[0081] The reset elastic member 230 is used to reset the rotated guide claw 210, so as to close the front end of the guide claw 210 to clamp on the blood vessel. The reset elastic member 230 is arranged at the front end of the support 220. One end of the reset elastic member 230 abuts against the inner wall of the cylinder 110, and the other end abuts against the outer side of the guide claw 210. Further, the reset elastic member 230 is arranged on the outer side of the rotatable guide claw 210. In the embodiment, the reset elastic member 230 is arranged on the outer side of the upper guide claw 211. The outer side of the upper guide claw 211 is further provided with a U-shaped plate. One end of the reset elastic member 230 is fixed in the cavity of the U-shaped plate to limit the end of the reset elastic member 230. The reset elastic member 230 can be a torsional spring. When the upper guide claw 211 rotates to open the front ends of the two guide claws 210, the torsional spring stores elastic potential energy. When the upper guide claw 211 rotates to close the front ends of the two guide claws 210, the torsional spring releases the elastic potential energy.

[0082] In this way, when the upper guide claw 211 needs to rotate to separate the front end of the upper guide claw 211 and the front end of the lower guide claw 212, and open, the first rotating mechanism 242 drives the tightening wheel 241 to rotate in the first direction, so that the pull wire 243 is wound on the tightening wheel 241, the pull wire 243 pulls the upper guide claw 211 to rotate around the hinge support point, and the torsional spring is compressed to store elastic potential energy; when the upper guide claw 211 needs to rotate to close the front end of the upper guide claw 211 and the front end of the lower guide claw 212, the first rotating mechanism 242 drives the tightening wheel 241 to rotate in the second direction, which is opposite to the first direction, so that the pull wire 243 is released from the tightening wheel 241, and the torsional spring releases the elastic potential energy to reset the upper guide claw 211.

[0083] In some embodiments, the feeding mechanism 300 is arranged in the shell 100, and includes a support plate 310, a cartridge 320, and a pushing plate 330. The support plate 310 fixes and supports the feeding mechanism 300 as a whole. The cartridge 320 is used to store a plurality of ties. The pushing plate 330 is used to push the ties in the cartridge 320 into the guide portion 111 of the barrel 110.

[0084] The support plate 310 is fixed with the shell 100 and / or the barrel 110, and extends through the feeding port 112 on the barrel 110 to the guide portion 111. The feeding port 112 on the barrel 110 is located corresponding to the cartridge 320, so that the ties in the cartridge 320 enter the guide portion 111 in the barrel 110 through the feeding port 112.

[0085] The cartridge 320 has two side plates 321 and two end plates 322, and the axial direction of the cartridge 320 is consistent with the length direction of the barrel 110. The two end plates 322 are fixed with the support plate 310, so that the cartridge 320 is connected with the support plate 310. The two side plates 321 are fixed with the two end plates 322 and have a gap with the support plate 310. The two side plates 321 are provided with guide plates 323 extending backward. The guide plate 323 near the barrel 110 extends through the feeding port 112 to the guide portion 111. At this time, the gap between the guide plate 323 and the side plate 321 is used for the movement of the pushing plate 330, and the ties at the bottom of the cartridge 320 can be pushed out from the gap at the bottom and enter the guide portion 111 of the barrel 110 along the gap between the guide plate 323 and the side plate 321.

[0086] The pushing plate 330 is movably arranged between the support plate 310 and the guide plate 323, and the pushing plate 330 is connected with the output end of a linear driving mechanism 340. The linear driving mechanism 340 drives the pushing plate 330 to move along the radial direction of the barrel 110, so as to push the ties at the bottom of the cartridge 320 into the guide portion 111 of the barrel 110.

[0087] Further, the linear driving mechanism 340 is arranged on the other side of the barrel 110 away from the support plate 310, and the output end of the linear driving mechanism 340 is fixed with a connecting block. An accommodation opening 251 is arranged on the upper side of the support plate 310, and the upper end of the connecting block is movably arranged through the accommodation opening 251 and fixed with the bottom of the pushing plate 330. At this time, the compact structure is more suitable for the narrow installation space in the shell 100. Further, a first sensor is arranged in the shell 100, and a first sensing part is arranged on the connecting block and matched with the first sensor. The position of the pushing plate 330 is determined through the cooperation of the first sensor and the first sensing part, so as to control the position state of the pushing plate 330.

[0088] In some embodiments, the tape feeding mechanism 400 comprises a pushing member 410 and a second power device 420. The pushing member 410 is driven by the second power device 420 to move in the axial direction of the guide part 111. The pushing member 410 can move to the front end of the barrel 110 or retreat to the rear end of the barrel 110, so that the guide part 111 of the barrel 110 is exposed and the tape is easy to enter.

[0089] The pushing member 410 comprises a push rod 411 and a push head 413. The push rod 411 is slidably arranged in the guide part 111 and is moved by the second power device 420. The push head 413 is arranged at the front end of the push rod 411 and is matched with the locking part of the tape. The thrust center line of the push head 413 is collinear with the clamping center line of the traction mechanism 500. The shape of the push head 413 is matched with the shape of the locking part of the tape. Further, the push head 413 has a recessed groove on the end surface of the locking part. When the locking part is clamped into the recessed groove, the locking part is limited and will not slip between the push head 413, so as to ensure the stable pushing of the tape and the stable relative position between the tape and the push head 413, and further ensure that the thrust center line of the push head 413 is collinear with the center line of the tape and will not deviate. At this time, the push rod 411 is moved by the second power device 420, and the push head 413 is moved by the push rod 411 to push the tape in the guide part 111. In this process, the guide part 111 can guide the movement of the tape and guide the movement of the push rod 411.

[0090] Further, the front end of the push rod 411 is bent upward to form a limiting step 412, and the back surface of the limiting step 412 can abut against the limiting block 113 at the front end of the barrel 110. When the push rod 411 moves to the front end of the barrel 110 and the limiting step 412 abuts against the limiting block, it is the maximum distance that the push head 413 can extend outward, that is, the maximum movement distance of the push head 413 after pushing the locking part of the tape into the accommodating space 213. It is avoided that the push head 413 excessively extrudes the blood vessel after excessively extending outward, so that the center of the ligation ring of the tape deviates from the barrel 110.

[0091] Further, the push head 413 has a through hole 414 for the strap to pass through, and the center line of the through hole 414 is collinear with the center line of the locking portion of the strap when the push head 413 acts on the strap. At this time, the center lines of the through hole 414, the locking portion, and the clamping portion of the traction mechanism 500 are collinear. When the strap passes through the locking portion arranged by itself, passes through the through hole 414 on the push member 410, and enters the traction mechanism 500, and the traction mechanism 500 exerts a traction force on the strap, the strap bears an axial tension, reduces the lateral scraping force between the strap and the locking portion, and improves the tightening effect of the strap.

[0092] Further, the second power device 420 includes a first long rack 421 and a first drive gear 422, and includes the first long rack 421, the first drive gear 422, and a second rotating mechanism 423. The second rotating mechanism 423 can be a stepping motor, a servo motor, or a direct current motor, which can be selected according to actual needs.

[0093] The first long rack 421 is arranged on the push rod 411 and located in a rack guide groove 114 on the barrel 110. The rack guide groove 114 is in communication with the guide portion 111 and is separated by a limiting convex rib 115. Preferably, the first long rack 421 and the push rod 411 form an I-shaped structure as a whole, and the limiting convex rib 115 is clamped in the concave portion of the I-shaped structure to limit the first long rack 421 and the push rod 411 as a whole.

[0094] The first drive gear 422 is arranged in the housing 100 and engaged with the first long rack 421. The first drive gear 422 is connected with the output end of the second rotating mechanism 423. At this time, the first drive gear 422 is driven to rotate by the second rotating mechanism 423, and the rotation of the first drive gear 422 can drive the first long rack 421 to move along the length direction of the barrel 110.

[0095] When the feeding mechanism 300 feeds the strap, the push member 410 retreats to the rear end of the housing 100, and the guide portion 111 is exposed to enable the strap to enter the guide portion 111. When it is needed to push the strap to enter the strap guide mechanism 200, the push rod 411 of the push member 410 moves in the guide portion 111 to push the strap to move to the strap guide mechanism 200.

[0096] Further, the first long rack 421 has a second sensing portion at the end away from the push head 413. Two second sensors matched with the second sensing portion are arranged in the housing 100. One of the second sensors is arranged in the middle of the housing 100 to detect whether the push head 413 of the push member 410 is extended to the position, and the other second sensor is arranged at the tail of the housing 100 to detect whether the push head 413 of the push member 410 is retreated to the position.

[0097] In some embodiments, the traction mechanism 500 is located on the upper side of the feeding mechanism 400, which is arranged along the length direction of the barrel 110.

[0098] The traction mechanism 500 includes two rows of ratchets 510 arranged in parallel on the ratchet support 530, which are arranged in the same direction as the length direction of the barrel 110. The teeth of the two rows of ratchets 510 together form a clamping surface for the strap. Further, the surface of the strap can be provided with holes, teeth, or other structures to facilitate high-friction engagement or mechanical interlocking with the teeth of the ratchets 510.

[0099] The two rows of ratchets 510 are synchronously and reversely rotated by the third power device 520 for traction of the strap movement. Further, a guide roller is arranged between each two adjacent ratchets 510 in each row of ratchets 510 to guide the movement of the strap. At this time, the end of the strap enters between the two rows of ratchets 510 after passing through the locking hole provided thereon. The teeth of the two rows of ratchets 510 clamp the end of the strap. The synchronous reverse rotation of the two rows of ratchets 510 causes the end of the strap to move in the two rows of ratchets 510 towards the rear end of the barrel 110, thereby applying a traction force to the end of the strap and achieving the tightening of the strap. Of course, after the tightening of the strap is achieved, the two rows of ratchets 510 can be reversed by the third power device 520. The teeth of the two rows of ratchets 510 drive the strap to move from the two rows of ratchets 510 towards the front end of the barrel 110, thereby causing the end of the strap to exit from the front end of the two rows of ratchets 510 and achieving the separation of the traction mechanism 500 from the strap, so as to release the vascular tissue ligator.

[0100] Further, the third power device 520 includes a transmission gear 521, third drive gears 522, and a third rotating mechanism 524. The third rotating mechanism 524 can be a stepping motor, a servo motor, or a direct current motor, which can be selected according to actual needs. The transmission gear 521 is arranged on the ratchet 510 and engages with the transmission gears 521 on the two rows of ratchets 510. The third drive gears 522 are arranged on one of the rows of ratchets 510 and synchronously rotate through a synchronous belt 523. One of the third drive gears 522 is fixed to the output end of the third rotating mechanism 524. At this time, the rotation of one of the third drive gears 522 driven by the third rotating mechanism 524 causes the synchronous rotation of the plurality of third gears under the action of the synchronous belt 523, thereby synchronously rotating the ratchets 510 in one row. When the ratchets 510 in one row rotate, the other row of ratchets 510 is synchronously rotated in the opposite direction through the transmission of the transmission gear 521, thereby achieving the synchronous reverse rotation of the two rows of ratchets 510. The synchronous belt 523 can be a chain or a belt. Preferably, the synchronous belt 523 is provided with teeth that engage with the transmission gear 521.

[0101] Further, the ratchet support 530 is driven by the fourth power device 540 to move along the length direction of the barrel 110. At this time, after the two rows of ratchets 510 clamp the end of the cable tie, the fourth power device 540 drives the ratchet support 530 to move to the rear end of the barrel 110, thereby driving the two rows of ratchets 510 clamping the end of the cable tie to retreat synchronously, and also applying a pulling force to the end of the cable tie in the direction of the rear end of the barrel 110, so as to realize the tightening of the cable tie. After the end of the cable tie is separated from the pulling mechanism 500, the fourth power device 540 can drive the ratchet support 530, the two rows of ratchets 510 and the third power device 520 to retreat to the rear end of the shell 100 as a whole, so as to make room for the pushing mechanism to retreat to the rear end of the shell 100.

[0102] Further, the fourth power device 540 comprises a second long rack 541, a fourth driving gear 542 and a fourth rotating mechanism 543. The fourth rotating mechanism 543 can be a stepping motor, a servo motor or a direct current motor, which can be selected according to actual needs. The second long rack 541 is arranged on the ratchet support 530, the fourth driving gear 542 is connected with the output end of the fourth rotating mechanism 543 arranged in the shell 100, and the fourth driving gear 542 is engaged with the second long rack 541. Further, the ratchet support 530 comprises a first long strip plate 531 and a second long strip plate 532, which are arranged in parallel. The two rows of ratchets 510 are arranged between the first long strip plate 531 and the second long strip plate 532. At this time, the gap between the first long strip plate 531, the second long strip plate 532 and the two rows of ratchets 510 serves as a moving channel for the cable tie, and the gap between the two rows of ratchets 510 is adapted to the width of the cable tie. Preferably, the first long strip plate 531 is arranged on the upper side of the second long strip plate 532 and is in sliding fit with the strip-shaped guide groove on the barrel 110, and the second long rack 541 is arranged on the first long strip plate 531. The fourth rotating mechanism 543 drives the fourth driving gear 542 to rotate, and then the fourth driving gear 542 engages the second long rack 541 to drive the second long rack 541 to move along the axial direction, thereby driving the ratchet support 530 fixed thereto to move, and further driving the ratchet support 530, the two rows of ratchets 510 and the third power device 520 to retreat as a whole.

[0103] In some embodiments, the front end of the ratchet support 530 is further provided with a pulling belt device 550, which is provided with a one-way locking hole 551, and a plurality of one-way clamping teeth are arranged in the one-way locking hole 551 and matched with the clamping groove area 11 of the cable tie. The one-way locking hole 551 is located on the same axis as the through hole 414 on the pushing member 410, and the outlet of the one-way locking hole 551 corresponds to the gap between the two rows of ratchets 510. In this way, when the cable tie passes through the locking hole provided on the cable tie, it enters the one-way locking hole 551 of the pulling belt device 550 and then enters the gap between the two rows of ratchets 510. The pulling belt device 550 can limit the movement direction of the cable tie. In combination with the locking hole provided on the cable tie, the one-way locking effect of the cable tie is improved. In addition, the cable tie can be prevented from being separated from the pulling belt device 550 after entering the pulling belt device 550, so that the connection between the cable tie and the pulling belt device 550 is stable, and the cable tie can be prevented from being separated from the pulling mechanism 500 when a pulling force is applied to the cable tie.

[0104] In some embodiments, the front side of the pulling mechanism 500 can be further provided with a cable tie cutting mechanism for cutting the excess part of the cable tie after the cable tie is tightened. For example, a cutting knife can be arranged in the pulling belt device 550, and the cutting knife is located on the front side of the one-way clamping tooth. The cutting knife is fixed to the output end of a cutting knife driving mechanism. The cutting knife driving mechanism can be an electric cylinder. The extension and retraction of the electric cylinder can drive the extension and retraction of the cutting knife, so that the cutting knife extends into the one-way locking hole 551 from the pulling belt device 550 to cut the cable tie. When the cable tie is cut, the pulling wire 243 and the cable tie ring can be separated, and the blood vessel tissue ligator is released. At this time, the waste part of the cable tie is located in the pulling mechanism 500. After the two rows of ratchets 510, the ratchet support 530 and the third power device 520 are driven by the fourth power device 540 to retreat to the rear end of the shell 100, the third power device 520 can be used to drive the two rows of ratchets 510 to rotate, so that the waste cable tie is discharged from the rear end of the two rows of ratchets 510.

[0105] Further, the rear end of the shell 100 can be provided with a waste collection device, as long as the waste cable tie can be discharged from the pulling ratchet 510 group and then discharged from the shell 100 or collected. For example, a waste discharge port can be arranged at the rear end of the shell 100, which corresponds to the gap between the two rows of pulling ratchet 510 groups, so that the pulling part 13 can be discharged from the waste discharge port. A collection bag can also be arranged at the rear end of the shell 100. The opening 251 of the collection bag corresponds to the rear end of the two rows of pulling ratchet 510 groups when they retreat to the rear end of the shell 100. When the waste is discharged from the two rows of pulling ratchet 510 groups, it falls into the collection bag.

[0106] The present application also provides an embodiment of a cable tie ligating system.

[0107] Reference Figures 1 to 10The present application relates to a kind of ligation system, including the above-mentioned vascular tissue ligator and vascular bandage, vascular bandage is placed in the cartridge 320 of the above-mentioned feeding mechanism, vascular bandage includes body 10 and locking portion 20, preferably, body 10 and locking portion 20 are integrally formed, and bandage is made of medical absorbable material or non-absorbable but no rejection material.

[0108] Body 10 is strip-shaped and has a clamping groove region 11 extending along the length direction of the body 10, the body 10 includes a bundling portion 12 and a pulling portion 13, the opposite ends of the bundling portion 12 and the pulling portion 13 have a connecting rib 14, the connecting rib 14 can be broken by external force to separate the bundling portion 12 and the pulling portion 13; the locking portion 20 is arranged at one end of the bundling portion 12 away from the pulling portion 13, and has a bandage locking hole 21 through which the body 10 is wound. Specifically, the bandage locking hole 21 is provided with a stopper matched with the clamping groove region 11. Further, the stopper is arranged on the bottom surface of the bandage locking hole 21 and is a plurality of one-way clamping teeth. When the body 10 is inserted into the bandage locking hole 21, the one-way clamping teeth are clamped into the clamping groove of the clamping groove region 11, so that the body 10 moves in one direction to realize the tightening operation. Preferably, the bundling portion 12 and the locking portion 20 are made of absorbable material, and the pulling portion 13 is made of plastic, which can save cost.

[0109] The locking of the bandage and the locking portion 20 uses the clamping groove region 11 of the body 10 and the bandage locking hole 21 to one-way lock the tightening ring of the hemostatic bandage. After the body 10 is wound and tightened, the bundling portion 12 is in contact with the surface of the blood vessel, and the clamping groove region 11 on the bundling portion 12 increases the resistance between the bundling portion 12 and the blood vessel to prevent movement. Through the design of the connecting rib 14 on the body 10, the bundling portion and the pulling portion 13 of the body 10 can be broken, the breaking point of the body 10 is controlled, and then the bundling portion 12 and the pulling portion 13 can be separated by external force. When the vascular bandage is placed in the cartridge 320 of the feeding mechanism 300, it is pushed into the guide portion of the cylinder by the feeding mechanism 300, and the vascular bandage is sent into the bandage guide mechanism by the belt feeding mechanism 400. Under the action of the bandage guide mechanism, the body 10 is wound on the blood vessel to form a sleeve tightening ring, and the pulling portion 13 passes through the locking hole of the locking portion 20 and enters the pulling mechanism 500. Then, the pulling portion 13 of the vascular bandage is pulled by the pulling mechanism 500 to make it move in the tightening direction to tighten the sleeve tightening ring. When the pulling portion 13 of the vascular bandage is continuously pulled, the locking portion 20 of the vascular bandage is limited by the pushing member 410, the position of the sleeve tightening ring formed by the bandage is limited, the force between the pulling portion 13 and the locking portion 20 gradually increases, and acts on the connecting rib 14 to break the connecting rib 14, which facilitates the precise separation of the excess part of the vascular bandage after the blood vessel is ligated.

[0110] Further, the traction part 13 of the cable is provided with a guide part 15 at one end away from the bundling part 12, the width of the guide part 15 at one end away from the traction part 13 is tapered inward along the axial direction of the cable, the width gradually decreases to form a triangular shape, facilitating the guide part 13 to enter the cable locking hole 21. The bundling part 12 and the locking part 20 are provided with a connecting part 16, the connecting part 16 extends in an arc shape and is connected at one end to the bottom of the locking part 20 and at the other end to one end of the bundling part 12 away from the traction part 13. In this way, the locking part 20 protrudes from the body 10, facilitating the guide part 15 to pass into the locking part 20 after the body 10 is wound. Further, the cable locking hole 21 on the locking part 20 is provided with a guide surface towards one side of the body 10, facilitating the guide of the guide part 15 of the body 10 to accurately enter the cable locking hole 21.

[0111] In use, initially, the pushing member 410 and the traction mechanism 500 are retracted to the rear end of the shell 100, so that the guide part 111 in the barrel 110 is exposed, and the cable is placed in the clamping chamber 320 of the feeding mechanism 300. When the front end of the blood vessel tissue ligator is inserted into the human body, the first rotating mechanism 242 is positively rotated, the pull wire 243 is tightened on the tightening wheel 241, the guide claw 210 is rotated about the fulcrum, the front ends of the two guide claws 210 are opened, and the two guide claws 210 clamp the blood vessels to be ligated, then the first rotating mechanism 242 is reversely rotated, the pull wire 243 is released from the tightening wheel 241, and under the action of the reset elastic member 230, the front ends of the two guide claws 210 are closed, at this time, the blood vessels are located between the two guide claws 210, and the cable guide grooves 215 on the two guide claws 210 are connected to form a guide channel for the cable to pass through.

[0112] Then, the linear driving mechanism 340 drives the pushing plate 330 to move along the radial direction of the barrel 110, and pushes the cable at the bottom of the clamping chamber 320 into the guide part 111 of the barrel 110, so as to realize automatic feeding of the cable.

[0113] The second rotating mechanism 423 drives the first driving gear 422 to rotate, and then drives the pushing rod 411 to move forward in the guide part 111 of the barrel 110 through the first long rack 421; at the same time, the fourth rotating mechanism 543 drives the fourth driving gear 542 to rotate, and drives the traction mechanism 500 to move forward as a whole through the second long rack 541. It can be understood that the cable feeding mechanism 400 and the traction mechanism 500 can be synchronized or unsynchronized, as long as the cable can enter between the two rows of ratchets 510 of the traction mechanism 500 after winding.

[0114] At this time, the pushing head 413 pushes the cable tie to move in the guide portion 111 towards the front end of the barrel 110 until the pulling portion 13 of the cable tie enters the cable tie guide slot 215 of one of the two guide claws 210 through the guide gap 214 at the rear end of the two guide claws 210. The pushing head 413 continuously pushes the cable tie, the cable tie moves in the guide channel and passes out of the guide channel, enters the cable tie locking hole 21 on the locking portion 20 of the cable tie under the guidance of the guide piece 216, and the body 10 of the cable tie is wound to form a cable tie loop around the blood vessel. The pulling portion 13 of the cable tie passes out of the cable tie locking hole 21 and enters the one-way locking hole 551 of the puller 550, and then enters between the two rows of ratchets 510 of the traction mechanism 500.

[0115] At the same time, the pushing head 413 pushes the locking portion 20 of the cable tie to gradually enter the accommodation space 213 between the two guide claws 210 from the guide gap 214, and the two rows of ratchets 510 pull the pulling portion 13 of the cable tie to tighten the cable tie loop formed after the cable tie is wound. The cable tie is extruded out of the opening 251 on the flexible sleeve 250 until the blood vessel ligation is completed. Of course, at this time, the fourth rotating mechanism 543 can also drive the fourth drive gear 542 to rotate, the second long rack 541 drives the traction mechanism 500 to retreat as a whole, the pulling portion 13 of the cable tie is pulled, and the tightening of the cable tie loop is realized.

[0116] When the blood vessel ligation is completed, the pushing head 413 abuts against the locking portion 20 of the cable tie to limit the locking portion 20 of the cable tie, the fourth rotating mechanism 543 drives the fourth drive gear 542 to rotate, drives the traction mechanism 500 to retreat as a whole, and tears the connecting rib 14 on the body 10 to realize the separation of the bundling portion 12 and the pulling portion 13 of the cable tie. Of course, it can be understood that the connecting rib 14 can also be torn by continuously applying a pulling force to the pulling portion 13 by the two rows of ratchets 510 to realize the separation of the blood vessel tissue ligation device and the bundling portion 12 of the cable tie, and the two can act alone or together.

[0117] Finally, the guide claws 210 are rotated again, the front ends of the two guide claws 210 are opened, the blood vessel is released, the barrel 110 is taken out of the human body, and one blood vessel ligation is completed.

[0118] After the bundling portion 12 and the pulling portion 13 of the cable tie are separated, the fourth rotating mechanism 543 drives the traction mechanism 500 to retreat as a whole to the rear end of the shell 100, and then the third rotating mechanism 524 drives the two rows of pull ratchet 510 groups to rotate, and the separated pulling portion 13 is discharged from between the two rows of pull ratchet 510 groups.

[0119] According to the above steps, the next blood vessel ligation is performed, and the reciprocating circulation can realize multiple ligations of the blood vessel.

[0120] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", 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 application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0121] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vascular tissue ligator, characterized by, The application relates to a device for tightening a cable tie, which comprises the following parts: a shell (100) provided with a barrel (110) having a guide part (111) inside; a cable tie guide mechanism (200) arranged at the front end of the barrel (110) and comprising two groups of guide claws (210) which are openable at the front end and have guide gaps (214) at the rear end; when closed, the two groups of guide claws (210) form an accommodating space (213), the cable tie guide grooves (215) on the two groups of guide claws (210) are connected to form a guide channel for the cable tie to pass through, and one cable tie guide groove (215) is connected to the guide part (111); a feeding mechanism (300) for pushing the cable tie into the guide part (111); a belt feeding mechanism (400) comprising a pushing piece (410) which can move along the axial direction of the barrel (110), the front end of the pushing piece (410) can extend into the accommodating space (213) through the guide gap (214), and the pushing head (413) of the pushing piece (410) is provided with a through hole (414) for the cable tie to pass through; a traction mechanism (500) which can be operatively connected to the body end of the cable tie and apply a traction force to the end to make it displace in a tightening direction, and when the cable tie passes through a locking part arranged by itself and enters the traction mechanism (500) through the through hole (414).

2. The vascular tissue ligator of claim 1, wherein The cable tie guide mechanism (200) further comprises: a support (220) arranged on the inner wall of the front end of the barrel (110), wherein the rear end of at least one guide claw (210) is hinged to the support (220) and can rotate around the hinge point by being driven by a first power device (240); a reset elastic member (230) arranged at the front end of the support (220), one end of the reset elastic member (230) abuts against the inner wall of the barrel (110), and the other end abuts against the outer side wall of the guide claw (210).

3. The vascular tissue ligator of claim 2, wherein, The first power device (240) comprises: a tightening wheel (241) arranged in the shell (100) and driven to rotate by a first rotating mechanism (242); a pull wire (243) connected to the tightening wheel (241) at one end and connected to the outer side wall of the guide claw (210) at the other end, and the connection point is located on the front side of the support (220).

4. The vascular tissue ligator of claim 1, wherein A flexible sleeve (250) is further arranged on the guide claw (210), and the side of the flexible sleeve (250) close to the accommodating space (213) is provided with an opening (251).

5. The vascular tissue ligator of claim 1, wherein The feeding mechanism (300) is arranged in the shell (100) and comprises: a support plate (310) which extends to the guide part (111) through a feeding port (112) on the barrel (110) on one side, The cartridge (320) has two side plates (321) and two end plates (322), the two end plates (322) are fixed with the support plate (310), the two side plates (321) are fixed with the two end plates (322) and have a gap with the support plate (310), and the two side plates (321) are provided with guide plates (323) extending backward, wherein the guide plate (323) near the side of the barrel (110) extends to the guide part (111) through the feeding port (112); The pushing plate (330) is movably arranged between the support plate (310) and the guide plate (323), and the pushing plate (330) is connected with the output end of the linear driving mechanism (340).

6. The vascular tissue ligator of claim 1, wherein The pushing member (410) comprises: The push rod (411) is slidably arranged in the guide part (111) and is moved by the second power device (420), the front end of the push rod (411) is bent upward to form a limiting step (412), and the back surface of the limiting step (412) can abut against the limiting block (113) at the front end of the barrel (110); The push head (413) is arranged at the front end of the push rod (411) and is adapted to the locking part of the cable tie, and the thrust center line of the push head (413) is collinear with the clamping center line of the traction mechanism (500).

7. The vascular tissue ligator of claim 6, wherein, The second power device (420) comprises: The first long rack (421) is arranged on the push rod (411) and located in the rack guide groove (114) on the barrel (110), the rack guide groove (114) is communicated with the guide part (111), and is separated by the limiting convex (115); The first driving gear (422) is arranged in the housing (100) and is engaged with the first long rack (421), and the first driving gear (422) is connected with the output end of the second rotating mechanism (423).

8. The vascular tissue ligator of claim 1, wherein, The traction mechanism (500) is located on the upper side of the cable feeding mechanism (400) and comprises two rows of ratchets (510) arranged in parallel on the ratchet support (530), the teeth of the two rows of ratchets (510) jointly form a clamping surface for the cable tie, the two rows of ratchets (510) are synchronously and reversely rotated by the third power device (520) for traction of the cable tie, and the ratchet support (530) is driven by the fourth power device (540) to be movable along the length direction of the barrel (110).

9. The vascular tissue ligator of claim 8, wherein, The third power device (520) comprises: The transmission gear (521) is arranged on the ratchet (510), and the transmission gears (521) on the two rows of ratchets (510) are engaged; The third driving gear (522) is arranged on one of the two rows of ratchets (510) and is synchronously rotated by the synchronous belt (523), and one of the third driving gears (522) is fixed with the output end of the third rotating mechanism (524).

10. The vascular tissue ligator of claim 8, wherein, The fourth power device (540) comprises: The second long rack (541) is arranged on the ratchet support (530), A fourth driving gear (542) is connected to the output end of a fourth rotating mechanism (543) arranged in the shell (100), and meshes with the second long rack (541).

11. The vascular tissue ligator of claim 8, wherein, The front end of the ratchet support (530) is further provided with a puller (550), which is provided with a one-way locking hole (551). The one-way locking hole (551) is located on the same axis as the through hole (414) on the pusher (410), and the outlet of the one-way locking hole (551) corresponds to the gap between the two rows of ratchets (510).

12. The vascular tissue ligator of claim 8, wherein, The outlet side of the guide channel is provided with a guide piece (216) extending away from the accommodation space (213) and inclined downward.

13. A cable ligation system, characterized by The blood vessel ligation device comprises the blood vessel ligation device and the blood vessel ligation band as claimed in any one of claims 1-12, The blood vessel ligation band is arranged in the cartridge chamber (320) of the feeding mechanism (300), The blood vessel ligation band comprises a body (10) and a locking portion (20). The body (10) has a strip-shaped structure and a clamping groove region (11) extending along the length direction of the body (10). The body (10) comprises a bundling portion (12) and a traction portion (13). The opposite ends of the bundling portion (12) and the traction portion (13) are provided with a connecting rib (14) which can be broken by external force. The locking portion (20) is arranged at the end of the bundling portion (12) away from the traction portion (13) and has a ligation band locking hole (21) through which the body (10) can be wound.

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