CN115040207A

CN115040207A - Blood vessel opening instrument

Info

Publication number: CN115040207A
Application number: CN202210834425.7A
Authority: CN
Inventors: 鄢艳; 胡浩; 殷向; 刘炳荣; 陶丽琴; 魏文庆
Original assignee: Jiangxi Colvin Biotechnology Co ltd
Current assignee: Jiangxi Colvin Biotechnology Co ltd
Priority date: 2022-07-16
Filing date: 2022-07-16
Publication date: 2022-09-13

Abstract

The invention belongs to the technical field of medical appliances. Relates to a vascular opening instrument, wherein a core bar (1) consists of a handle (2), a rotating wheel (3), a screw rod (4) and a sealing element (5); the sleeve (6) consists of an outer tube (7), a connecting seat (8), a side tube (9), a valve (10) and a sealing element (11); runner (3) are connected closely with screw rod (4), rotate runner (3), or borrow and drive runner 3 and rotate by external power supply to drive screw rod (4) and rotate, handle (2) and connecting seat (8) design have screw thread and spout that matches each other, can lock connecting seat (8) in the distal end and the near-end of handle (2). The invention is used for medical units to crush and suck thrombus, and simultaneously to cut plaques, calcify and proliferate intima in a rotary manner, thereby solving the problem of blood vessel stenosis while opening blood paths.

Description

Blood vessel opening instrument

Technical Field

The invention relates to a medical appliance, in particular to a vessel opening instrument.

Background

The vascular access is a 'life line' for the uremia patients to live, the loss of the function of the internal fistula is more and more emphasized with the gradual increase of the number of dialysis persons and the prolongation of the dialysis time, the loss of the function of the internal fistula becomes the main reason for hospitalization and surgical treatment of the hemodialysis patients, the occlusion of the internal fistula causes physical damage to the patients, mental panic is caused, and the high-rate PTA operation also increases the economic burden of the patients. It is statistically estimated that 14% of AVF and 50-80% of AVG are acutely lost every year, and 17.8% of these vascular access losses are due to thrombosis.

Clinically, thrombus of different periods and different conditions is roughly divided into the following five treatment modes: drug thrombolysis, physical therapy, open surgery, interventional therapy and compound surgery; the drug thrombolysis and physical therapy have certain limitations and limited open rate. The open surgery and the compound surgery have the greatest damage to the vascular resources of the patients, and are not beneficial to the long-term treatment and the health management of the patients. The interventional therapy is mainly an imported apparatus, the cost is high, and the existing thrombus removal products in the market have unsatisfactory effects on complete occlusion embolism, dispersion distribution embolism, long-distance embolism, old adherent thrombus, plaque, calcification and hyperplasia intima.

Market congeneric use products represent 1: the ARGON catheter is a rotary thrombus removal product and is characterized by comprising an S-shaped guide wire, wherein the S-shaped guide wire penetrates through a thrombus occlusion area during use, the guide wire is driven to rotate through electric power, thrombus in a blood vessel is smashed, and then the broken thrombus is sucked and removed through other blood vessel sheaths, a suction catheter and the like. It is characterized in that the cost is high, belonging to active apparatus; when in use, the thrombus blocking area needs to be penetrated, and the clinical operation has certain difficulty; the treatment effect on old adherent thrombus, plaque and hyperplasia intima needs to be evaluated; damage to the patient's blood vessels remains to be confirmed.

Market category other products represent 2: the Solitaire FR catheter is a stent thrombus removal product and is characterized in that the product comprises a section of metal stent, the product penetrates through a thrombus occlusion area during use, the metal stent is pushed out, thrombus is cut and broken during stent expansion, and then the broken thrombus is sucked and removed by means of external suction equipment. It is characterized by high cost, need to penetrate the thrombus occlusion area when in use, and certain difficulty in clinical operation; old adherent thrombi, plaques, and intimal hyperplasia can not be treated. And the length of the product processing blocking section is limited by the length of the metal bracket, and the opening range is limited.

SUMMARY OF THE PATENT FOR INVENTION

The invention provides a vessel opening instrument which has direct effect, is convenient to use, safe and effective, and can effectively treat thrombus, plaque, calcification and hyperplasia intima in various forms.

In order to achieve the technical purpose, the invention is realized by adopting the following technical scheme: a vessel opening device, characterized by: the core bar (1) consists of a handle (2), a rotating wheel (3), a screw rod (4) and a sealing element (5); the sleeve (6) consists of an outer tube (7), a connecting seat (8), a side tube (9), a valve (10) and a sealing element (11); the rotating wheel (3) is tightly connected with the screw rod (4), the rotating wheel (3) is rotated, or the rotating wheel (3) is driven to rotate by an external power source, so that the screw rod (4) is driven to rotate, the handle (2) and the connecting seat (8) are provided with threads and sliding grooves which are matched with each other, and the connecting seat (8) can be locked at the far end and the near end of the handle (2);

further: the center of the screw rod (4) is provided with a variable diameter core wire, the closer to the handle end, the smaller the gap between the screw rod (4) and the outer tube (7), and the outer surface of the screw rod (4) is provided with a thread structure with axial cutting edges. The center of the screw rod (4) is provided with a variable diameter core wire, the closer to the handle end, the smaller the gap between the screw rod (4) and the outer pipe (7), the outer surface of the screw rod (4) is provided with a thread structure with an axial cutting edge, the outer surface is a thread structure with an axial small purpose, the thread structure is similar to a transmission thread structure, the thread structure with the axial cutting edge can be a single-end thread, a double-end thread or a triple-end thread, the thread profile is designed into an axial flanging form, the edge is sharp, and the thread structure with the axial cutting edge is convenient for the screw rod to move forwards.

Further: the sealing element (5) and the sealing element (11) are arranged to act together, so that the blood seepage in the use process of the product is effectively prevented.

The invention has the following beneficial effects:

the invention has simple principle, small structure, convenient use, safety and reliability, and can effectively treat thrombus plaques, calcification, hyperplasia intima and the like in various forms. Compared with the similar product technology in the market, the method has the characteristics that:

aiming at the treatment of common thrombus, the main advantages are that:

the invention is different from the existing products in the market, such as cutting thrombus by a metal bracket and cutting thrombus by rotating an S-shaped guide wire, and adopts a screw rod 4 to rotate and stir thrombus; the appearance of the screw needle 4 is a thread structure with an axial small purpose, a similar transmission thread structure, a single-end thread opening is generally designed to be a double-end thread or a triple-end thread, and a thread tooth form is designed to be in an axial flanging shape with sharp edges. The axial cutting edge can ensure that the screw rod can not scratch blood vessels in the advancing process, when the screw rod 4 rotates, the rotary cutting effect can be generated on plaque, calcification and hyperplasia intima in the blood vessels, and the problem of blood vessel stenosis is solved while the blood path is opened. The special thread design is utilized to generate dragging force on the thrombus around the screw rod 4 and bring the thrombus into the outer tube 7; the thrombus entering the outer tube 7 can be compressed and smashed into fine fragments, and is convenient to discharge from the side tube 9. The effect is more direct. Meanwhile, the product does not need to penetrate through the thrombus section in clinical use, and the thrombus is directly crushed by rotating from the approach direction until the occlusion section is opened, so that the operation difficulty is greatly reduced. Even if the thrombus is dispersed, the thrombus is broken forwards until the thrombus is completely opened. The appearance of screw rod 4 is a helicitic texture who has the axial blade, and the axial blade can guarantee that the screw rod can not fish tail the blood vessel in the in-process of advancing, when screw rod 4 rotates, can produce the rotary-cut effect to plaque, calcification, the hyperplasia intima in the blood vessel, when the blood way was opened, solved the narrow problem of blood vessel in the lump.

Drawings

FIG. 1 is a structural diagram of a core rod of the invention,

figure 2 is a structural diagram of the patent sleeve of the invention,

fig. 3 is a view showing a structure in which the coupling holder 8 is locked to the proximal end of the handle 2, the screw 4 is extended outward,

fig. 4 is a view showing the structure in which the coupling holder 8 is locked to the distal end of the handle 2, the screw 4 is covered,

FIG. 5 is a cross-sectional view of the screw 4 with the variable diameter core wire and the axial cutting edge,

fig. 6 is a view of the thread structure of the reducing core wire and the axial cutting edge of the screw rod 4.

Detailed Description

Example 1

A vessel opening device, characterized by: the core rod (1) consists of a handle (2), a rotating wheel (3), a screw rod (4) and a sealing element (5); the sleeve (6) consists of an outer tube (7), a connecting seat (8), a side tube (9), a valve (10) and a sealing element (11); the rotating wheel (3) is tightly connected with the screw rod (4), the rotating wheel (3) is rotated, or the rotating wheel (3) is driven to rotate by an external power source, so that the screw rod (4) is driven to rotate, the handle (2) and the connecting seat (8) are provided with threads and sliding grooves which are matched with each other, and the connecting seat (8) can be locked at the far end and the near end of the handle (2); the center of the screw rod (4) is provided with a variable diameter core wire, the closer to the handle end, the smaller the gap between the screw rod (4) and the outer tube (7), and the outer surface of the screw rod (4) is provided with a thread structure with axial cutting edges. The center of the screw rod (4) is provided with a variable diameter core wire, the closer to the handle end, the smaller the gap between the screw rod (4) and the outer pipe (7), the threaded structure with an axial cutting edge is arranged on the outer surface of the screw rod (4), the outer surface is provided with an axial small-purpose threaded structure, the like transmission threaded structure is similar, the threaded structure with the axial cutting edge can be a single-head thread, the thread profile is designed into an axial flanging form, the edge is sharp, and the threaded structure with the axial cutting edge is convenient for the screw rod to move forwards. The sealing element (5) and the sealing element (11) act together to effectively prevent the product from bleeding in the using process.

In embodiment 2, the thread structure of the axial cutting edge may be a double-start thread or a double-start thread, and the other structure is the same as that of embodiment 1.

Embodiment 3, the thread structure of the axial cutting edge can be a three-start thread or a two-start thread, and other structures are the same as those of embodiment 1.

The invention comprises the following working steps:

step 1: the product is pushed to make the front end of the catheter reach a target point, the connecting seat 8 is pushed to be locked at the near end of the handle 2 in a twisting mode, and at the moment, the screw rod 4 extends outwards to be close to the thrombus. The rotating wheel 3 is stirred to drive the screw rod 4 to rotate, thrombus is smashed, and meanwhile, due to the viscosity and the special thread design of the thrombus, the rotating screw rod 4 generates dragging force on the peripheral thrombus, brings the thrombus into the outer pipe 7, and conveys the thrombus to the handle end;

step 2: the center of the screw rod 4 is provided with a variable diameter core wire, and the closer to the handle end, the smaller the gap between the screw rod 4 and the outer tube 7 is. So that the thrombus entering the outer tube 7 is continuously compressed and smashed into fine fragments in the process of being conveyed to the handle end;

and step 3: connecting the injector product with the valve 10 of the sleeve 6, and pulling back the injector to pump away broken thrombus;

and 4, step 4: the appearance of screw rod 4 is a helicitic texture who has the axial blade, and the axial blade can guarantee that the screw rod can not fish tail the blood vessel in the process of advancing, and when screw rod 4 rotated, the blade constantly produced the rotary-cut effect to bellied plaque, calcification, hyperplasia intima in the blood vessel until protruding tissue is amputated, solved the narrow problem of blood vessel in the lump.

And 5: twist reverse promotion connecting seat 8 and make it lock in the distal end of handle 2, make outer tube 7 wrap up screw rod 4 completely, pull back handle 2 and pull out the product wholly from the blood vessel. Because the screw rod 4 is completely coated, the withdrawal process can not cause secondary damage to blood vessels.

The working principle of the invention is as follows:

1. the rotating wheel 3 is tightly connected with the screw rod 4, and the rotating wheel 3 can be directly rotated by a user or the rotating wheel 3 is driven to rotate by an external power source, so that the screw rod 4 is driven to rotate, and thrombus is stirred. Meanwhile, due to the viscosity and the special thread design of the thrombus, the rotating screw rod 4 generates dragging force on the thrombus at the periphery and brings the thrombus into the outer tube 7; the center of the screw rod 4 is provided with a variable diameter core wire, and the closer to the handle end, the smaller the gap between the screw rod 4 and the outer tube 7 is. So that the thrombus entering the outer tube 7 is continuously compressed and smashed into fine fragments in the process of being conveyed to the handle end; facilitating discharge from the side pipe 9. The product is pushed forward to open the blood vessel and relieve the occlusion.

2. The appearance of screw rod 4 is a helicitic texture who has the axial blade, and the axial blade can guarantee that the screw rod can not fish tail the blood vessel in the in-process of advancing, when screw rod 4 rotates, can produce the rotary-cut effect to plaque, calcification, the hyperplasia intima in the blood vessel, when the blood way was opened, solved the narrow problem of blood vessel in the lump.

3. Twist reverse promotion connecting seat 8 and make it lock in the distal end of handle 2, make outer tube 7 wrap up screw rod 4 completely, pull back handle 2 and pull out the product wholly from the blood vessel. Because the screw rod 4 is completely coated, the withdrawal process can not cause secondary damage to blood vessels.

Claims

1. A blood vessel opening device is characterized in that: the core rod (1) is made up of a handle (2), a runner (3), a screw rod (4) and a seal (5); the sleeve (6) is made up of an outer tube ( 7), the connecting seat (8), the side pipe (9), the valve (10), and the seal (11); the runner (3) is tightly connected with the screw (4), the runner (3) is rotated, or The external power source drives the runner 3 to rotate, thereby driving the screw (4) to rotate. The handle (2) and the connecting seat (8) are designed with matching threads and chute, which can lock the connecting seat (8) to the handle (2) distal and proximal ends.

2. A blood vessel opening device as claimed in claim 1, characterized in that: the center of the screw (4) is a variable diameter core wire, and the closer to the handle end, the gap between the screw (4) and the outer tube (7) The smaller the screw (4) is, the outer surface of the screw (4) is provided with a thread structure with an axial cutting edge, and the outer surface is a thread structure with an axial small purpose, similar to a transmission thread structure, and the thread structure of the axial cutting edge can be a single-start thread. , Double thread or triple thread, the thread profile is designed in the form of axial flanging, the edge is sharp, and the thread structure of the axial edge is convenient for the screw to move forward.

3. A blood vessel opening device according to claim 1, characterized in that: a sealing member (5) and a sealing member (11) are provided, which work together to effectively prevent blood oozing during the use of the product.