CN219230043U - Vascular opening instrument - Google Patents

Abstract

The utility model 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 (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 piece (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 designed 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 utility model is used for medical units to crush and suck thrombus, simultaneously rotary cut plaque, calcification and hyperplasia intima, and solves the problem of vascular stenosis while opening blood paths.

Description

Vascular opening instrument

Technical Field

The utility model relates to a medical appliance, in particular to a vascular opening appliance.

Background

The vascular access is a life line on which uremic patients live, and as the number of dialysis people increases and the dialysis time increases, internal fistula loss is more and more important, so that the internal fistula is the most main cause of hospitalization and surgical treatment of hemodialysis patients, and the occlusion of the internal fistula causes physical injury and mental panic to the patients, and the high PTA operation also increases the economic burden of the patients.

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

The same type of market use product represents 1: ARGON catheter is a rotary thrombus removing product, and is characterized in that the product comprises a section of S-shaped guide wire, when in use, the S-shaped guide wire penetrates through a thrombus occlusion area, the rotary guide wire is driven by electric power to break up thrombus in a blood vessel, and then the broken thrombus is sucked and removed through other vascular sheaths, suction catheters and the like. The device is characterized in that the cost is high, and the device belongs to an active instrument; when in use, the thrombus occlusion area needs to be penetrated, and the clinical operation has certain difficulty; the treatment effect of old adherent thrombus, plaque and hyperplasia intima is to be evaluated; damage to the patient's blood vessel is to be confirmed.

Other products of the same market class represent 2: solitaire FR catheter is a stent thrombolysis product, and is characterized in that the product comprises a section of metal stent, when in use, the product penetrates through a thrombus occlusion area, the metal stent is pushed out, the thrombus is cut and crushed in the stent expanding process, and then the crushed thrombus is sucked and removed by means of external suction equipment. The device is characterized in that the cost is high, the thrombus occlusion area needs to be penetrated when the device is used, and the clinical operation has certain difficulty; can not treat old adherent thrombus, plaque and intima hyperplasia. And the length of the product treatment occlusion section is limited by the length of the metal bracket, and the openable range is limited.

Disclosure of Invention

The utility model provides a vascular opening device which has direct action, is convenient to use, is safe and effective, and can effectively treat thrombus, plaque, calcification and intima hyperplasia in various forms.

In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme: the vascular opening instrument comprises a core bar, a handle (2), a rotating wheel (3), a screw rod (4) and a first sealing piece (5); the sleeve consists of an outer tube (7), a connecting seat (8), a side tube (9), a valve (10) and a second sealing piece (11); the rotating wheel (3) is tightly connected with the screw (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 (4) is driven to rotate, the handle (2) and the connecting seat (8) are designed with mutually matched threads and sliding grooves, 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 diameter-variable core wire, the closer to the handle end, the smaller the gap between the screw rod (4) and the outer tube (7), and the screw rod (4) is provided with a thread structure with an axial cutting edge on the outer surface. The center of the screw rod (4) is a reducing core wire, the closer to the handle end is, the smaller the gap between the screw rod (4) and the outer tube (7) is, the screw rod (4) is provided with a thread structure with an axial cutting edge, the screw rod is provided with an axial thread structure similar to a transmission thread structure, the thread structure of the axial cutting edge can be a single-head thread, a double-head thread or a triple-head thread, the thread tooth is designed into an axial flanging shape, the edge is sharp, and the screw rod is convenient to move forward due to the thread structure of the axial cutting edge.

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

The utility model has the following beneficial effects:

the utility model has simple principle, small structure, convenient use, safety and reliability, and can effectively treat thrombus plaques, calcification, intima hyperplasia and the like in various forms. Compared with other similar products in the market, the technology is characterized in that:

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

different from the existing products in the market, the metal bracket is used for cutting thrombus, the S-shaped guide wire is used for rotationally cutting thrombus, and the screw 4 is used for rotationally cutting thrombus; the screw 4 has an axial thread structure and a transmission thread structure, and is usually designed into a form of a single-head thread or a three-head thread, the thread profile is designed into an axial flanging form, and the edge is sharp. The axial cutting edge can ensure that the blood vessel is not scratched in the advancing process of the screw rod, and when the screw rod 4 rotates, the rotational cutting effect can be generated on plaque, calcification and hyperplasia intima in the blood vessel, and the blood vessel stenosis problem is solved at the same time when the blood path is opened. The special thread design is utilized to generate dragging force on thrombus around the screw 4 and the thrombus is carried into theouter tube 7; the thrombus entering theouter tube 7 is compressed and crushed into fine pieces, which are easily discharged from theside tube 9. The action and effect are more direct. Meanwhile, the product does not need to penetrate through the thrombus section in clinical use, and thrombus is directly smashed through rotation from the direction of the approach until the occlusion section is opened, so that the operation difficulty is greatly reduced. Even if the thrombus is in the face of dispersion distribution, the thrombus only needs to be broken forwards until the thrombus is completely opened. The appearance of the screw 4 is a thread structure with an axial cutting edge, the axial cutting edge can ensure that blood vessels can not be scratched in the advancing process of the screw, and when the screw 4 rotates, the rotational cutting effect can be generated on plaque, calcification and hyperplasia intima in the blood vessels, and the blood vessel stenosis problem can be solved at the same time when a blood path is opened.

Drawings

Figure 1 is a schematic view of the core rod structure of the present utility model,

figure 2 is a schematic view of the structure of the sleeve of the present utility model,

fig. 3 is a view showing the structure of the connectingseat 8 locked at the proximal end of the handle 2, the screw 4 extended outwards,

fig. 4 is a view showing the structure of the connectingseat 8 locked at the distal end of the handle 2, the screw 4 being covered,

figure 5 is a cross-sectional view of the variable diameter core wire and axial cutting edge thread characteristics of the screw 4,

fig. 6 is a diagram of the thread structure of the variable diameter core wire and the axial cutting edge of the screw 4.

Detailed Description

Example 1

The vascular opening instrument comprises a core bar, a handle (2), a rotating wheel (3), a screw rod (4) and a first sealing piece (5); the sleeve consists of an outer tube (7), a connecting seat (8), a side tube (9), a valve (10) and a second sealing piece (11); the rotating wheel (3) is tightly connected with the screw (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 (4) is driven to rotate, the handle (2) and the connecting seat (8) are designed with mutually matched threads and sliding grooves, 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 diameter-variable core wire, the closer to the handle end, the smaller the gap between the screw rod (4) and the outer tube (7), and the screw rod (4) is provided with a thread structure with an axial cutting edge on the outer surface. The center of the screw rod (4) is a reducing core wire, the closer to the handle end is, the smaller the gap between the screw rod (4) and the outer tube (7) is, the screw rod (4) is provided with a thread structure with an axial cutting edge, the screw rod is provided with an axial thread structure similar to a transmission thread structure, the thread structure of the axial cutting edge can be a single-head thread, the thread tooth is designed into an axial flanging form, the edge is sharp, and the screw rod is convenient to move forward due to the thread structure of the axial cutting edge. The first sealing piece (5) and the second sealing piece (11) are combined to effectively prevent blood seepage in the use process of the product.

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 structures are the same as those in embodiment 1.

In embodiment 3, the thread structure of the axial cutting edge may be triple thread or double thread, and the other structures are the same as those in embodiment 1.

The working steps of the utility model are as follows:

step 1: the product is pushed so that the catheter front end reaches the target point, and the connectingseat 8 is torsionally pushed so as to be locked at the proximal end of the handle 2, and the screw 4 is extended outwards to be close to the thrombus. The rotating wheel 3 is stirred to drive the screw 4 to rotate, thrombus is smashed, and meanwhile, due to the viscosity of the thrombus and the special thread design, the rotating screw 4 generates dragging force on peripheral thrombus, and the thrombus is carried into theouter tube 7 and is transmitted to the handle end;

step 2: the center of the screw 4 is a reducing core wire, and the closer to the handle end, the smaller the gap between the screw 4 and theouter tube 7 is. So that the thrombus entering theouter tube 7 is continuously compressed and crushed into fine fragments during the process of being conveyed to the handle end;

step 3: connecting the syringe product with thevalve 10 of the sleeve 6, and pulling back the syringe to remove the broken thrombus;

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

Step 5: the connectingseat 8 is pushed by torsion to lock the connecting seat on the far end of the handle 2, so that theouter tube 7 completely covers the screw 4, and the handle 2 is returned to draw the whole product from the blood vessel. Since the screw 4 is completely covered, the retraction process does not cause secondary damage to the blood vessel.

The working principle of the utility model is as follows:

1. the rotating wheel 3 is tightly connected with the screw 4, and a user can directly rotate the rotating wheel 3 or drive the rotating wheel 3 to rotate by an external power source so as to drive the screw 4 to rotate, thereby crushing thrombus. Simultaneously, due to the viscosity of thrombus and the special thread design, the rotating screw 4 generates dragging force on peripheral thrombus and is carried into theouter tube 7; the center of the screw 4 is a reducing core wire, and the closer to the handle end, the smaller the gap between the screw 4 and theouter tube 7 is. So that the thrombus entering theouter tube 7 is continuously compressed and crushed into fine fragments during the process of being conveyed to the handle end; facilitating the discharge from theside pipes 9. The blood vessel can be always opened forwards only by pushing the product forwards, and the occlusion is released.

2. The appearance of the screw 4 is a thread structure with an axial cutting edge, the axial cutting edge can ensure that blood vessels can not be scratched in the advancing process of the screw, and when the screw 4 rotates, the rotational cutting effect can be generated on plaque, calcification and hyperplasia intima in the blood vessels, and the blood vessel stenosis problem can be solved at the same time when a blood path is opened.

3. The connectingseat 8 is pushed by torsion to lock the connecting seat on the far end of the handle 2, so that theouter tube 7 completely covers the screw 4, and the handle 2 is returned to draw the whole product from the blood vessel. Since the screw 4 is completely covered, the retraction process does not cause secondary damage to the blood vessel.

Claims (1)

1. A vascular opening device, characterized by: the core bar consists of a handle (2), a rotating wheel (3), a screw (4) and a first sealing piece (5); the sleeve consists of an outer tube (7), a connecting seat (8), a side tube (9), a valve (10) and a second sealing piece (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 designed with threads and sliding grooves which are matched with each other, 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 a reducing core wire, the closer to the handle end is, the smaller the gap between the screw rod (4) and the outer tube (7) is, the screw rod (4) is provided with a thread structure with an axial cutting edge, the thread structure with the axial cutting edge is a single-head thread, double-head thread or triple-head thread, the thread tooth type is designed into an axial flanging shape, the edge is sharp, and the thread structure of the axial cutting edge is convenient for the screw rod to move forward.

Images