Internal arteriovenous fistula shunt blood vessel blocking maturation promoting device

Abstract

The invention discloses an internal arteriovenous fistula shunt blood vessel blocking and maturation promoting device, relates to the technical field of medical apparatuses and instruments, and solves the technical problems that an existing internal fistula maturation promoting device at present can oppress an arteriovenous internal fistula blood vessel while oppressing a target blood vessel, and a good target oppressing effect cannot be achieved. The device comprises a first fixing part, a fixing belt is arranged on the first fixing part, the two ends of the fixing belt and the two sides of the first fixing part on the corresponding side are detachably arranged through first clamping pieces correspondingly, and telescopic clamping structures matched with the first fixing part are arranged on the first clamping pieces. A pressing assembly is arranged on the fixing belt in a sliding mode. The invention aims to realize reliable compression on an internal arteriovenous fistula shunt target blood vessel without interfering with compression on other blood vessels needing to be mature. The pressing assembly arranged in a sliding mode selectively compresses arteriovenous internal fistula branch blood vessels to block and shunt, so that ideal blood vessels are selectively mature, and internal fistula is promoted to expand and mature according to the ideal blood vessels planned by medical care.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an arteriovenous fistula shunt vessel blocking and maturation promoting device. Background Art

[0002] An arteriovenous fistula is a core vascular structure created surgically for hemodialysis. It serves as the lifeline for hemodialysis patients, draining blood from the body, purifying it in the dialysis machine, and then returning it to the body. Through surgery, an artery and vein are directly anastomosed together subcutaneously, allowing high-pressure, high-flow arterial blood to flow directly into the low-pressure, low-resistance venous system. The arterialized venous segment is the most critical and commonly used part of the fistula. Once arterial blood enters the vein, it experiences pressures and flows far exceeding those of normal veins, undergoing a series of adaptive changes known as maturation. Its primary sources are the radial artery in the forearm and the brachial artery in the upper arm, providing high-pressure, oxygen-rich blood. During each dialysis session, medical staff puncture the arterialized venous segment with two thick needles. One arterial needle drains blood from the body into the dialysis machine, while the other venous needle returns the purified blood to the body.

[0003] In order to promote the maturation of arteriovenous fistula, it is necessary to compress some blood vessels so that the arteriovenous fistula vessels can form a large flow passage as much as possible. However, the currently available fistula maturation-promoting blockers use ring-shaped compressors, which will compress the arteriovenous fistula vessels at the same time as compressing the target blood vessels, and cannot achieve a good selective target compression effect. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an arteriovenous fistula shunt vessel blocking and maturation promoting device. Through the detachable setting of the fixing belt and the first clamping piece, the device can be conveniently fixed around the patient's limb and adapt to different limb circumferences. The first clamping piece is engaged with the two sides of the first fixing part, providing a firm locking mechanism to prevent the device from accidentally loosening during use; and the first clamping piece can be adjusted and moved on the first fixing part, thereby achieving reliable compression of the target vessel of the arteriovenous fistula shunt without interfering with the compression of other blood vessels that need to mature; the sliding pressing component can selectively compress the branch blood vessels of the arteriovenous fistula to block the shunt, thereby selectively maturing the ideal blood vessels and promoting the fistula to expand and mature according to the ideal blood vessels planned by the medical care.

[0005] The technical solution adopted in the present invention is as follows:

[0006] An arteriovenous fistula shunt vessel blocking and maturation promoting device includes a first fixing part, a fixing belt is provided on the first fixing part, the two ends of the fixing belt and the two sides of the corresponding first fixing part are respectively detachably provided through a first clamping piece, the first clamping piece is clamped with the first fixing part, the first clamping piece is provided with a retractable clamping structure that cooperates with the first fixing part, and the two sides of the first fixing part are provided with clamping strips that cooperate with the clamping structure; a pressing component is slidably provided on the fixing belt.

[0007] By adopting the above technical solution, the detachable setting of the fixing belt and the first fixing part makes it convenient to fix the device around the patient's limb and adapt to different limb circumferences. The first clamping piece is engaged with the two sides of the first fixing part, providing a firm locking mechanism along the circumference of the first fixing part to prevent the device, i.e., the fixing belt, from accidentally sliding and loosening during use; and the first clamping piece can be adjusted and moved on the first fixing part, which is convenient for adjusting the position of the two ends of the fixing belt relative to the arm, thereby achieving reliable compression of the target blood vessel of the arteriovenous fistula shunt without interfering with the compression of other blood vessels that need to mature; the sliding pressing component can selectively compress the branch blood vessels of the arteriovenous fistula to block the shunt, thereby selectively maturing the ideal blood vessel, and promoting the fistula to expand and mature according to the ideal blood vessel planned by the medical care.

[0008] Preferably, the first fixing portion includes a first fixing strip and a second fixing strip, two second fixing strips are symmetrically connected to each end of the first fixing strip, and the first fixing strip and the second fixing strip are located in the same horizontal plane; there are multiple clamping strips, which are respectively arranged on the opposite sides inside each of the second fixing strips, and each of the clamping strips is arranged along the length direction of the second fixing strip, and the first clamping piece is movably clamped along the length direction of the second fixing strip.

[0009] By adopting the above technical solution, the first fixing part is decomposed into a first fixing strip and a symmetrical second fixing strip, forming a stable base structure similar to an "I" or "double-wing" plane. With the support of the pressing component, it can help to fit the device more firmly to the limb, avoiding interference with the patient's arm caused by other protruding strip structures; and distribute the tension of the fixing belt more evenly to reduce local pressure; it is clear that the strip is set on the opposite side of the second fixing strip and along its length direction, providing a clear sliding clamping path for the first clamping part, and clearly indicating that the first clamping part is movably clamped along the length direction of the second fixing strip, thereby facilitating the length adjustment of the specific clamping position.

[0010] Preferably, each of the clamping strips is provided with a plurality of vertical ridges, and a clamping slot is formed between two adjacent ridges, and the clamping slot cooperates with the clamping structure.

[0011] By adopting the above technical solution, the ridges and slot structures on the card strip provide the card structure with multiple discrete and clear engagement positions, realizing sliding on the second fixed strip. The slot structure facilitates the operator to clamp it into place and prevents the first card connector from accidentally sliding on the card strip, thereby improving the fixation reliability. In conjunction with the elastic component of the card structure, the slot allows the first card connector to be adjusted on the card strip in a step-by-step and gear-wise manner.

[0012] Preferably, the first clamping member includes a first mounting seat, an elastic pressing portion is fixed on the first mounting seat, an opening with a distance is formed between the two sides of the first mounting seat and the elastic pressing portion, and the two sides of the middle section of the elastic pressing portion are respectively connected with a clamping block through an elastic member, and in an initial state, the outer side of the clamping block protrudes from the opening, the lower part of the clamping block is an arc-shaped structure, the two sides of the elastic pressing portion are located at the upper part of the clamping block, and the fixing belt passes through the elastic pressing portion.

[0013] By adopting the above technical solution, the elastic pressing part is pressed to overcome the resistance of the second spring, so that the card block retracts and disengages from the card slot, thereby achieving quick unlocking; after release, the second spring pushes the card block to return to its original position and snaps into the card slot, thereby achieving automatic or convenient snap-in locking; the lower part of the arc-shaped card block is convenient for sliding into the internal cavity of the mounting seat, and the design of passing the fixing belt through the elastic pressing part allows the fixing belt to be pressed by the sliding card block, so that it is relatively fixed to the first clamping part during the adjustment process and will not be displaced, thereby combining a simplified structure of fixing and snapping.

[0014] Preferably, the elastic pressing portion includes a mounting plate, a mounting rod is movably passed through the mounting plate, a blocking piece is provided at the top end of the mounting rod, the size of the blocking piece is larger than the penetration point between the mounting rod and the mounting plate, the bottom end of the mounting rod is connected to a second spring, and the bottom end of the second spring is fixed to the inner bottom of the first mounting seat.

[0015] The above technical solution specifically realizes the elastic function of the elastic pressing part; the mobility of the mounting rod in the mounting plate and the second spring provide automatic reset capability after pressing; and the design of the baffle facilitates manual pressing of the contact.

[0016] Preferably, the elastic member includes a sleeve and a connecting rod, one end of the sleeve is fixed to the outer wall of the mounting rod, the side of the clamping block close to the mounting rod is fixed to the outer wall of the mounting rod through the connecting rod and the first spring in turn, one end of the connecting rod is fixed to the clamping block, and the other end of the connecting rod is fixed to the end of the first spring, and the first spring and part of the connecting rod are located inside the sleeve.

[0017] By adopting the above technical solution, the mechanism for realizing the telescopic movement of the card block is clearly defined. The connecting rod and the sleeve serve as cooperating guide structures. The first spring provides the elastic force to make the card block protrude outward to facilitate the resetting of the card block; the sleeve also plays the role of protecting the spring. The setting of the connecting rod and the sleeve helps to ensure that the card block moves in a straight line, avoids skewing and jamming, and improves reliability.

[0018] Preferably, a second clamping member is provided at each end of the fixing belt, and the second clamping member is located on a side of the first fixing portion away from the pressing assembly.

[0019] Using the above technical solution, second clips are provided at both ends of the fixing belt away from the pressing assembly, which are used to clip and fix the ends of the two fixing belts after the device is wrapped around the limb to form a complete closed loop, further enhancing the stability of the device and preventing it from loosening; the second clips also have an adjustment function, so that the circumference of the closed loop, that is, the tightness of the fixing belt, can be adjusted to better adapt to the thickness of the limbs of different patients.

[0020] Preferably, the pressing assembly includes a second mounting seat, two fixing straps are provided, the fixing straps pass through the side walls of the second mounting seat, the second mounting seat is located between the two fixing straps and is provided with a first adjusting rod in a vertical direction thread, and a pressing plate is provided at the bottom of the first adjusting rod; second adjusting rods are respectively provided on both side walls of the second mounting seat, and the end of the second adjusting rod close to the first adjusting rod can abut against the fixing strap.

[0021] By adopting the above technical solution, the pressing depth of the pressing plate can be precisely controlled by screwing the first adjusting rod, thereby adjusting the pressure force applied to the branch blood vessel of the arteriovenous fistula that needs to be blocked and shunted, to meet the needs of patients with different arteriovenous fistula branch blood vessel occlusions; after the first adjusting rod slides to the target position, it abuts against the fixing belt, thereby fixing the relative position of the pressing component and the fixing belt; the second mounting seat provides stable support and guidance for the first adjusting rod, and the pressing plate converts point pressure into softer surface pressure, reducing the risk of tissue damage, clarifying the position of the pressing component relative to the fixing belt, and helping to accurately locate the pressure point.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] Through the detachable setting of the fixing belt and the first clamping part, the device can be conveniently fixed around the patient's limb and adapted to different limb circumferences. The first clamping part is engaged with both sides of the first fixing part, providing a firm locking mechanism to prevent the device from accidentally loosening during use; and the first clamping part can be adjusted and moved on the first fixing part, thereby achieving reliable compression of the target blood vessel of the arteriovenous fistula shunt without interfering with the compression of other blood vessels that need to mature; the sliding pressing component can selectively compress the branch blood vessels of the arteriovenous fistula to block the shunt, thereby selectively maturing the ideal blood vessel and promoting the fistula to expand and mature according to the ideal blood vessel planned by the medical care. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of an arteriovenous fistula shunt vessel blocking and maturation promoting device in the present invention;

[0026] Figure 2 This invention Figure 1 Schematic diagram of the enlarged structure of part A in the middle;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of an arteriovenous fistula shunt vessel blocking and maturation promoting device in the invention;

[0028] Figure 4 It is a schematic diagram of the connection structure of the first clamping member in the invention;

[0029] Figure 5 It is a schematic diagram of the connection structure of the pressing component in the invention;

[0030] Figure 6 It is a structural diagram of the invention in use state.

[0031] Reference numerals

[0032] 1-first fixing bar, 2-second fixing bar, 3-clamping bar, 4-fixing belt, 5-pressing assembly, 6-first clamping part, 601-mounting plate, 602-block, 603-first mounting seat, 604-sleeve, 605-connecting rod, 606-first spring, 607-second spring, 7-second clamping part, 8-convex ridge, 9-second mounting seat, 10-first adjusting rod, 11-pressing plate, 12-second adjusting rod, 13-branch blood vessel, 14-ideal blood vessel. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0034] The following combination Figure 1 ~,6 describe the present invention in detail.

[0035] Example 1

[0036] An arteriovenous fistula shunt vessel blocking and maturation promoting device, see attached Figure 3 , including a first fixing part, on which a fixing belt 4 is provided, and the two ends of the fixing belt 4 are detachably provided with the two sides of the first fixing part on the corresponding side through a first clamping piece 6, the first clamping piece 6 is clamped with the first fixing part, and the first clamping piece 6 is provided with a retractable clamping structure that cooperates with the first fixing part, and the two sides of the first fixing part are provided with a clamping strip 3 that cooperates with the clamping structure; a pressing component 5 is slidably provided on the fixing belt 4; the detachable setting of the fixing belt 4 and the first fixing part facilitates the device to be fixed around the patient's limb and adapt to different limb circumferences. The first clamping piece 6 is clamped with the two sides of the first fixing part to provide a firm locking mechanism to prevent the device from accidentally loosening during use; and the first clamping piece 6 can be adjusted and moved on the first fixing part, thereby achieving reliable compression of the target blood vessel of the arteriovenous fistula shunt without interfering with and compressing other blood vessels that need to mature; the sliding pressing component 5 blocks the shunt by selectively compressing the branch blood vessel 13 of the arteriovenous fistula, thereby selectively maturing the ideal blood vessel 14, and promoting the expansion and maturation of the fistula according to the ideal blood vessel 14 planned by the medical care.

[0037] Among them, the fixing belt 4 is made of silicone material, and its outer surface is covered with a polyurethane waterproof coating; it can meet the curvature of the limb. The material of the fixing belt 4 itself is existing technology and will not be described here.

[0038] In this embodiment, the first fixing portion includes a first fixing bar 1 and a second fixing bar 2, two second fixing bars 2 are symmetrically connected to each end of the first fixing bar 1, and the first fixing bar 1 and the second fixing bar 2 are located in the same horizontal plane; a plurality of clamping bars 3 are provided, respectively arranged on opposite sides of the inside of each second fixing bar 2, each clamping bar 3 is arranged along the length direction of the second fixing bar 2, and the first clamping member 6 is movably clamped along the length direction of the second fixing bar 2; the first fixing portion is decomposed into the first fixing bar 1 and the symmetrical second fixing bars 2, The formation of a stable base structure similar to the plane shape of an "I" or "double wings", combined with the support of the pressing component 5, can help to fit the device more firmly on the limb, avoiding the interference of other protruding forms of the clip 3 structure on the patient's arm; and distribute the tension of the fixing belt 4 more evenly to reduce local pressure; it is clear that the clip 3 is arranged on the opposite side inside the second fixing strip 2 and along its length direction, providing a clear sliding clipping path for the first clip 6, and clearly indicating that the first clip 6 is movably clipped along the length direction of the second fixing strip 2, thereby facilitating the length adjustment of the specific clip position.

[0039] Among them, the first fixing bar 1 and the second fixing bar 2 are both shapeable metal plates, such as aluminum splints for fixing finger fractures. This metal can be shaped according to the shape of the arm and the compression position. This metal plate has a certain plasticity that can be bent into shape, a certain elasticity to provide tension, and can also provide support.

[0040] The first fixing bar 1 and the second fixing bar 2 are both made of standard medical stainless steel with a thickness of 0.8-1.2 mm.

[0041] In this embodiment, each of the card strips 3 is provided with a plurality of vertical ridges 8, and each spaced ridge 8 forms a slot, and the slot cooperates with the card structure; the ridges 8 and the slot structure on the card strip 3 provide the card structure with a plurality of discrete and clear engagement positions, thereby realizing sliding on the second fixed strip 2. The slot structure facilitates the operator to clamp into place and prevents the first card connector 6 from accidentally sliding on the card strip 3, thereby improving the fixation reliability; in conjunction with the elastic component of the card structure, the slot allows the first card connector 6 to be adjusted on the card strip 3 in a step-by-step and gear-wise manner.

[0042] In this embodiment, refer to the attached Figure 4, the first clamping member 6 includes a first mounting seat 603, an elastic pressing portion is fixed on the first mounting seat 603, an opening with a distance is formed between the two sides of the first mounting seat 603 and the elastic pressing portion, and the two sides of the middle section of the elastic pressing portion are respectively connected with a clamping block 602 through an elastic member. In the initial state, the outer side of the clamping block 602 protrudes from the opening, and the lower part of the clamping block 602 is an arc-shaped structure. The two sides of the elastic pressing portion are located at the upper part of the clamping block 602, and the fixing belt 4 passes through the elastic pressing portion; by pressing the elastic pressing portion, the resistance of the second spring 607 is overcome, and the clamping block 602 is retracted and disengaged from the slot, realizing quick unlocking; after release, the second spring 607 pushes the clamping block 602 to return to the original position and snap into the slot, realizing automatic or convenient clamping and locking;

[0043] In this embodiment, the elastic pressing part includes a mounting plate 601, and a mounting rod is movably passed through the mounting plate 601. A baffle is provided at the top of the mounting rod, and the size of the baffle is larger than the penetration point between the mounting rod and the mounting plate 601. The bottom end of the mounting rod is connected to a second spring 607, and the bottom end of the second spring 607 is fixed to the inner bottom of the first mounting seat 603; the elastic function of the elastic pressing part is specifically realized; the mobility of the mounting rod in the mounting plate 601 and the second spring 607 provide automatic reset capability after pressing; the design of the baffle is convenient for manually pressing the contact.

[0044] In this embodiment, the elastic member includes a sleeve 604 and a connecting rod 605, one end of the sleeve 604 is fixed to the outer wall of the mounting rod, and the side of the block 602 close to the mounting rod is fixed to the outer wall of the mounting rod in sequence through the connecting rod 605 and the first spring 606, one end of the connecting rod 605 is fixed to the block 602, and the other end of the connecting rod 605 is fixed to the end of the first spring 606, and part of the first spring 606 and the connecting rod 605 are located inside the sleeve 604; the mechanism for realizing the telescopic movement of the block 602 is clearly defined, the connecting rod 605 and the sleeve 604 serve as a cooperating guide structure, and the first spring 606 provides an elastic force to make the block 602 protrude outward to facilitate the resetting of the block 602; the sleeve 604 also plays the role of protecting the spring. The setting of the connecting rod 605 and the sleeve 604 helps to ensure that the block 602 moves in a straight line, avoids skewness and jamming, and improves reliability.

[0045] Example 2

[0046] Different from Example 1, the lower part of the arc-shaped block 602 is easy to slide into the internal cavity of the mounting seat, and the design of passing the fixing belt 4 through the elastic pressing part allows the fixing belt 4 to be pressed by the sliding block 602, so that it is relatively fixed with the first clamping member 6 during the adjustment process without displacement, thereby combining a simplified structure of fixing and clamping.

[0047] Example 3

[0048] In this embodiment, refer to the attached Figures 1-2 , the two ends of the fixing belt 4 are respectively provided with a second clip 7, and the second clip 7 is located on the side of the first fixing part away from the pressing component 5; the second clip 7 is provided at both ends of the fixing belt 4 away from the pressing component 5, which is used to clamp and fix the ends of the two fixing belts 4 after the device is wrapped around the limb to form a complete closed loop, further enhancing the stability of the device and preventing loosening; the second clip 7 also has an adjustment function, so that the circumference of the closed loop, that is, the tightness of the fixing belt 4, can be adjusted to better adapt to the limb thickness of different patients.

[0049] Among them, the second clamping part 7 is a pig nose buckle structure, the fixing belt 4 passes through the pig nose buckle, and a spring clamping part is provided inside the pig nose buckle, which can clamp the fixing belt 4. The pig nose buckle is a common rope fixing structure. Those skilled in the art are aware of its fixing principle and basic structure, which will not be repeated here.

[0050] Example 4

[0051] In this embodiment, refer to the attached Figure 5 The pressing assembly 5 includes a second mounting seat 9, and the fixing belt 4 is provided with two, and the fixing belt 4 passes through the side wall of the second mounting seat 9, and the second mounting seat 9 is located between the two fixing belts 4 and is threaded with a first adjusting rod 10 in the vertical direction, and a pressing plate 11 is provided at the bottom of the first adjusting rod 10; the two side walls of the second mounting seat 9 are respectively provided with a second adjusting rod 12, and the end of the second adjusting rod 12 close to the first adjusting rod 10 can abut against the fixing belt 4; by screwing the first adjusting rod 10, the pressing depth of the pressing plate 11 can be accurately controlled, thereby adjusting the pressure applied to the arteriovenous fistula branch vessel 13 that needs to be blocked and shunted, to meet the needs of patients with different arteriovenous fistula branch vessels 13 blocked, the second mounting seat 9 provides stable support and guidance for the first adjusting rod 10, and the pressing plate 11 converts point pressure into softer surface pressure, reduces the risk of tissue damage, clarifies the position of the pressing assembly relative to the fixing belt 4, and helps to accurately locate the pressure point.

[0052] Among them, the first adjusting rod 10 and the second adjusting rod 12 are both provided with external threads, and the positions of the first adjusting rod 10 and the second adjusting rod 12 corresponding to the installation of the second mounting seat 9 are provided with internal threads. By tightening the first adjusting rod 10 and the second adjusting rod 12 with the second mounting seat 9, the second adjusting rod 12 can be fixed to the fixing belt 4, and the first adjusting rod 10 can be pressed on the patient's target blood vessel.

[0053] Refer to the attached Figure 6 A method for using an arteriovenous fistula shunt vessel blocking and maturation promoting device is as follows:

[0054] Step 1: Pass both ends of the fixing belt 4 through the elastic pressing portion of the first clip 6, align the block 602 of the first clip 6 with the clip 3 inside the second fixing strip 2, press the stopper of the elastic pressing portion to retract the block 602, and slide the first clip 6 into the track of the second fixing strip 2; release the stopper, and the block 602 automatically snaps into the slot, that is, the gap between the ridges 8;

[0055] Step 2: Pass the patient's forearm through the loop formed between the fixing belt 4 and the first fixing portion, with the first fixing strip 1 attached to the underside of the limb; wrap the fixing belt 4 around the patient, tightening both ends of the fixing belt 4 to fit the limb;

[0056] Step 3: Slide the second mounting seat 9 along the fixing belt 4 to the pre-positioned branch vessel 13, align the pressing plate 11 with the blood vessel position to adjust the compression position; tighten the second adjustment rods 12 on both sides so that the ends of the second adjustment rods 12 press against the fixing belt 4 to prevent the second mounting seat 9 from shifting, and continue to rotate the first adjustment rod 10 so that the pressing plate 11 presses the surface of the target branch vessel 13 to adjust the compression force;

[0057] Step 4: Adjust the tightness of the fixing belt 4 by fixing the two ends of the fixing belt 4 through the pig nose buckles of the second clamping member 7;

[0058] Step 5: After use, rotate the first adjustment rod 10 to completely loosen it, so that the pressing plate 11 is separated from the skin, press the pig nose buckle release button to release the second clamping member 7, and at the same time press the blocking pieces of the two first clamping members 6 to remove the device from the first fixing part.

[0059] It should be noted that a great deal of pressure is required to stop bleeding at the puncture point of a mature arteriovenous fistula. The purpose of the device designed in this application is not to compress the puncture point to stop bleeding. This device should be used during the maturation period of the arteriovenous fistula to promote the maturation of the selected venous fistula return vessels. The maturation period is generally 6 to 8 weeks after the arteriovenous fistula surgery. Once the fistula matures, the effect will be unsatisfactory. The greater the flow rate of the branch blood vessel 13 to be compressed, the higher the compression force required.

[0060] Clinical trials with patients showed that the blood flow in target vessels increased by 40% to 60% after using this device, and the maturation time was shortened to 4 weeks.

[0061] It should be noted that:

[0062] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An arteriovenous fistula shunt vessel blocking and maturation device, characterized in that: The invention comprises a first fixing part, a fixing belt (4) is provided on the first fixing part, and the two ends of the fixing belt (4) and the two sides of the first fixing part on the corresponding side are detachably provided through a first clamping member (6), the first clamping member (6) is clamped with the first fixing part, the first clamping member (6) is provided with a retractable clamping structure that cooperates with the first fixing part, and the two sides of the first fixing part are provided with clamping strips (3) that cooperate with the clamping structure; a pressing component (5) is slidably provided on the fixing belt (4).

2. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 1, characterized in that: The first fixing portion comprises a first fixing strip (1) and a second fixing strip (2), two second fixing strips (2) are symmetrically connected to each end of the first fixing strip (1), and the first fixing strip (1) and the second fixing strip (2) are both located in the same horizontal plane; a plurality of clamping strips (3) are provided, which are respectively provided on opposite sides of the inside of each second fixing strip (2), and each clamping strip (3) is provided along the length direction of the second fixing strip (2), and the first clamping member (6) is movably clamped along the length direction of the second fixing strip (2).

3. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 2, characterized in that: Each of the clamping strips (3) is provided with a plurality of vertical ridges (8), and a clamping slot is formed between two adjacent ridges (8), and the clamping slot cooperates with the clamping structure.

4. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 1, characterized in that: The first clamping member (6) includes a first mounting seat (603), an elastic pressing portion is fixed on the first mounting seat (603), an opening with a distance is formed between the two sides of the first mounting seat (603) and the elastic pressing portion, and the two sides of the middle section of the elastic pressing portion are respectively connected with a clamping block (602) through an elastic member. In the initial state, the outer side of the clamping block (602) protrudes from the opening, the lower part of the clamping block (602) is an arc-shaped structure, the two sides of the elastic pressing portion are located at the upper part of the clamping block (602), and the fixing belt (4) passes through the elastic pressing portion.

5. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 4, characterized in that: The elastic pressing portion includes a mounting plate (601), a mounting rod movably passing through the mounting plate (601), a blocking piece is provided at the top end of the mounting rod, the size of the blocking piece is larger than the penetration point between the mounting rod and the mounting plate (601), the bottom end of the mounting rod is connected to a second spring (607), and the bottom end of the second spring (607) is fixed to the inner bottom of the first mounting seat (603).

6. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 5, characterized in that: The elastic member comprises a sleeve (604) and a connecting rod (605), one end of the sleeve (604) is fixed to the outer wall of the mounting rod, and the side of the clamping block (602) close to the mounting rod is fixed to the outer wall of the mounting rod in sequence through the connecting rod (605) and the first spring (606), one end of the connecting rod (605) is fixed to the clamping block (602), and the other end of the connecting rod (605) is fixed to the end of the first spring (606), and parts of the first spring (606) and the connecting rod (605) are located inside the sleeve (604).

7. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 1, characterized in that: A second clamping member (7) is provided at each end of the fixing belt (4), and the second clamping member (7) is located on a side of the first fixing portion away from the pressing assembly (5).

8. The arteriovenous fistula shunt vessel blocking and maturation device according to claim 1, characterized in that: The pressing assembly (5) includes a second mounting seat (9), two fixing belts (4) are provided, and the fixing belts (4) pass through the side walls of the second mounting seat (9). The second mounting seat (9) is provided with a first adjusting rod (10) in a vertical direction threaded between the two fixing belts (4), and a pressing plate (11) is provided at the bottom of the first adjusting rod (10); second adjusting rods (12) are respectively provided on the two side walls of the second mounting seat (9), and the end of the second adjusting rod (12) close to the first adjusting rod (10) can abut against the fixing belt (4).

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