CN116077139A

CN116077139A - Bolt taking device

Info

Publication number: CN116077139A
Application number: CN202310021751.0A
Authority: CN
Inventors: 周毅; 闭佳俊; 桂宝珠
Original assignee: Jiangsu Pupeng Medical Technology Co ltd
Current assignee: Jiangsu Pupeng Medical Technology Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-05-09

Abstract

The invention provides a thrombus taking device which comprises an outer tube assembly and an inner tube assembly, wherein the outer tube assembly comprises an outer tube body, the inner tube assembly is arranged in the outer tube body in a penetrating mode, the inner tube assembly comprises an inner sheath hose, an inner shaft and a thrombus taking assembly, the inner shaft is arranged in the inner sheath hose in a penetrating mode, the thrombus taking assembly is connected with the inner shaft, and the inner shaft and the outer tube body are arranged in a non-coaxial mode. The thrombus taking device can adapt to the bending of the blood vessel at different degrees, is not easy to cause the jam and damage the blood vessel and vein wall during the intravascular movement, reduces the pain of patients in the treatment process, and reduces the requirement of the using skills of medical staff in the treatment process.

Description

Bolt taking device

Technical Field

The invention relates to the field of medical instruments, in particular to the field of interventional medical instruments, and specifically relates to a thrombus taking device.

Background

Venous thromboembolism refers to abnormal coagulation of blood in veins, complete or incomplete occlusion of blood vessels, and belongs to a venous return obstruction disease. Including deep vein thrombosis and pulmonary thromboembolism. The disease is often combined with pulmonary embolism, venous thrombosis syndrome, chronic thrombotic pulmonary hypertension and the like, and seriously affects the life quality and work of patients.

Endovascular treatment of vascular occlusions, and related devices, systems, and methods, are a new technical approach to thrombus extraction, particularly for extracting thrombus from the peripheral vasculature.

In this way, the thrombus is extracted by first opening the catheter at the corresponding site of the blood vessel, and threading the guidewire into the catheter, along the blood vessel, to the rear of the attached blood clot on the blood vessel wall. The outer shaft, intermediate shaft and inner shaft of the thrombus removing device are then passed along the guide wire to the rear of the thrombus, and at this time, the outer shaft, catheter, intermediate shaft and inner shaft are coaxially arranged. The coring element and the mesh braid structure are released by rotating the fixed block on the handle. The coring element and mesh braid are made of a memory metal, such as nitinol, that expands to fill the inside diameter of the vessel when exposed to normal temperature blood after release. At this time, the device consisting of the outer shaft, the intermediate shaft and the inner shaft is simultaneously pulled proximally, and the sharp edge of the coring element can strip blood clots and tissues attached to the blood vessel wall into the net structure together until the coring element is pulled out to the position of the catheter. The luer fitting on the catheter assembly is then connected with a syringe, the on-off valve is opened, and thrombus is withdrawn. The thrombus extraction device is designed to remove large clot volumes, which can effectively core and separate large volumes of thrombus while capturing the separated thrombus in a woven mesh. The need for medicaments such as thrombolytic agents is reduced. This reduces the risk of bleeding, recovery time of the body after treatment, and reduces the cost of the health care procedure.

However, to facilitate operation during a thrombus removal procedure, endovascular treatment of vascular occlusions, and related devices, systems, and methods, require high coaxiality of the outer shaft with the catheter, the intermediate shaft with the outer shaft, and the inner shaft with the intermediate shaft during the thrombus removal procedure. Because the structure of the human body blood vessel is tortuous and complicated, the coaxial outer shaft and the catheter, the intermediate shaft and the outer shaft are inserted in the curved blood vessel, the phenomenon that each shaft is blocked when being pulled away is probably caused, a doctor is difficult to pull away in the process of taking thrombus, and the device is damaged seriously; and the device can damage the vessel wall at the bent part of the vessel, so that the vessel wall is inflamed to form new thrombus; through the venous valve, the venous valve is damaged, and the venous valve is seriously disabled. Meanwhile, the outer shaft is required to be coaxial with the catheter, the intermediate shaft is required to be coaxial with the outer shaft, and the inner shaft is required to be coaxial with the intermediate shaft, so that the whole manufacturing and processing technology of the instrument is higher in requirement, higher in cost and not easy to popularize and use.

Disclosure of Invention

The invention provides a thrombus taking device which can adapt to the bending of blood vessels to different degrees, is not easy to cause jam and damage blood vessels and vein walls during intravascular movement, reduces the pain of patients in the treatment process and reduces the requirements of medical staff on using skills in the treatment process.

The invention provides a thrombus taking device which comprises an outer tube assembly and an inner tube assembly, wherein the outer tube assembly comprises an outer tube body, the inner tube assembly is arranged in the outer tube body in a penetrating mode, the inner tube assembly comprises an inner sheath hose, an inner shaft and a thrombus taking assembly, the inner shaft is arranged in the inner sheath hose in a penetrating mode, the thrombus taking assembly is connected with the inner shaft, and the inner shaft and the outer tube body are arranged in a non-coaxial mode.

Further, the inner tube assembly further comprises a traction shaft and an inner tube adjusting handle, the inner shaft and the traction shaft are respectively arranged in the inner sheath hose in a penetrating mode, the inner tube assembly further comprises an inner tube adjusting handle, and the inner tube adjusting handle is arranged on the inner sheath hose and connected with the traction shaft to drive the traction shaft to move relative to the inner shaft.

Further, the thrombus taking assembly comprises a first end close to the adjusting handle and a second end far away from the adjusting handle, the first end of the thrombus taking assembly is connected with the inner shaft, and the second end of the thrombus taking assembly is connected with the traction shaft.

Further, the thrombus taking assembly is of a net structure, the thrombus taking assembly comprises a connecting portion and a net body, one end of the connecting portion is connected with the net body, the other end of the connecting portion is connected with the inner shaft, and the traction shaft is connected with one end of the net body away from the connecting portion.

Further, the connecting portion is a plurality of, a plurality of connecting portion's one end all with the interior axle links to each other, and the other end is followed the circumference interval setting of netted body, and connect in on the netted body.

Further, the lengths of the plurality of connection portions are not equal so that the inner shaft connected to the connection portions is offset from the axis of the mesh body.

Further, one of the inner tube assembly and the inner shaft is made of an elastic material, and the other of the inner tube assembly and the inner shaft is made of a non-elastic material.

Further, the elastic material comprises a memory alloy wire, a spring tube, an elastic plastic rope or an elastic plastic tube; the inelastic material includes steel cable, solid wire, plastic tube with braid or spiral hollow tube.

Further, the traction shaft body is made of a spiral hollow tube, the inner shaft is made of a spring tube, or the traction shaft body is made of a spring tube, and the inner shaft is made of a spiral hollow tube.

Further, the thrombolysis assembly is not provided with an inner tube.

Further, the thrombus taking assembly further comprises a catheter assembly, the catheter assembly comprises a catheter body, an introduction sheath, a catheter fixing piece, a catheter assembly emptying pipe and a catheter assembly emptying valve, one end of the catheter body is connected with the catheter fixing piece, the other end of the catheter body is connected with the introduction sheath, the catheter assembly emptying pipe is arranged on the catheter fixing piece and communicated with an internal pipeline of the catheter body through the catheter fixing piece, the catheter assembly emptying valve is arranged on the catheter assembly emptying pipe, and the outer pipe assembly and the inner pipe assembly penetrate into the catheter body.

In summary, in the invention, by the non-coaxial arrangement of the inner shaft and the outer tube body, the adaptability of the thrombus taking device to the bending of the blood vessel can be improved, the damage to the blood vessel wall and the vein half mould is reduced, and the labor can be saved more when the outer tube assembly is pulled to move, and the requirement on the operation precision is reduced.

Further, the traction shaft and the inner shaft are simultaneously arranged in the inner sheath hose, and the traction shaft and the inner shaft are respectively connected with two ends of the thrombus taking assembly, so that the non-coaxiality of the inner shaft and the outer tube body can be ensured.

Further, through the arrangement of the inner shaft deviating from the axis of the netlike body, the non-coaxiality of the inner shaft and the outer tube body can be ensured, so that the thrombus taking device is more suitable for shuttling in a curved blood vessel, is not easy to cause blocking and is not easy to damage the blood vessel and vein wall

Further, by making one of the inner shaft and the traction shaft body made of an elastic material and the other of the inner shaft and the traction shaft body made of a non-elastic material, it is possible to secure transmission of pushing force and pulling force while accommodating bending of a blood vessel. Under the premise that the inner shaft and the outer tube body are not coaxially arranged, special materials for the inner shaft and the traction shaft are adopted, so that an operator can be allowed to lengthen the shaft to prevent the shaft from being stretched when in misoperation, the damage of the vascular wall and the vein valve can be further reduced, the pain of a patient in the treatment process is reduced, and the requirement on the using skill of medical staff in the treatment process is reduced.

Further, by eliminating the intermediate shaft, the gap between the inner tube assembly and the outer tube assembly can be increased to maintain a non-coaxial arrangement between the inner shaft and the outer tube body. Furthermore, through omitting the jackshaft, and the setting of interior axle and outer tube body non-coaxial, can make the bolt device of taking out when manufacturing and processing, the technological requirement is lower, and the requirement on operating personnel is lower, reduce cost easily popularizes and uses.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.

Drawings

Fig. 1 is a schematic axial side structure of a catheter assembly of a thrombus removal device according to a first embodiment of the present invention.

Fig. 2 is a schematic side view of the catheter assembly of fig. 1.

Fig. 3 is a schematic axial side structure of an obturator of a thrombus removal device according to a first embodiment of the present invention.

Fig. 4 is a schematic side view of the obturator of fig. 3.

Fig. 5 is a schematic axial side structure of an outer tube assembly according to a first embodiment of the present invention.

Fig. 6 is a schematic side view of the outer tube assembly of fig. 5.

Fig. 7 is a schematic axial side structure of an inner tube assembly according to a first embodiment of the present invention.

Fig. 8 is a schematic side view of the inner tube assembly of fig. 7.

Fig. 9 is a schematic structural view of an end portion of an inner tube assembly according to a first embodiment of the present invention.

Fig. 10 is a partially enlarged schematic view of the structure of fig. 9.

Fig. 11 is a schematic view showing the positional relationship among the inner sheath tube, the traction shaft and the inner shaft in fig. 9.

Fig. 12 is a schematic axial structure of a syringe according to a first embodiment of the present invention.

Fig. 13 is a schematic view showing the structure of the end of the inner tube assembly according to the second embodiment of the present invention.

Fig. 14 is a partially enlarged schematic view of the structure of fig. 13.

Fig. 15 is a schematic view showing the positional relationship among the inner sheath tube, the traction shaft and the inner shaft in fig. 13.

Detailed Description

In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 and 2, the thrombus removing device provided by the present invention includes a catheter assembly 10, wherein the catheter assembly 10 includes a catheter body 11, an introduction sheath 12, a catheter fixing member 13, a catheter assembly evacuation tube 14 and a catheter assembly evacuation valve 15.

One end of the catheter body 11 is connected with the catheter fixing piece 13, the other end is connected with the introducing sheath 12, and the catheter assembly emptying pipe 14 is arranged on the catheter fixing piece 13 and is communicated with the internal pipeline of the catheter body 11 through the catheter fixing piece 13. A duct assembly evacuation valve 15 is provided to the duct assembly evacuation tube 14 to control the duct assembly evacuation tube 14.

The area of the cross section of the introduction sheath 12 in the direction perpendicular to the axis thereof gradually increases from the side near the catheter body 11 to the side far from the catheter body 11, in other words, it is substantially funnel-shaped. The introducer sheath 12 may be a nitinol woven mesh structure. The mesh structure may be automated or manual for guiding subsequently inserted components during retrieval of the thrombus, reducing thrombus escape.

In use, the catheter body 11 of the catheter assembly 10 may be inserted into the open vessel to guide the subsequent assembly, first of all, adjacent to the popliteal access site, femoral access site or endocervical access site opening of the thrombus.

A back-flow valve (not shown), such as a silicone back-flow valve, is also provided within the catheter assembly 10 fixture to prevent back-flow of blood.

As shown in fig. 3 and 4, the thrombus removing device provided by the present invention further comprises an packer assembly 20, wherein the packer assembly 20 comprises an packer guide head 21, an packer packing tube 22, an packer guide tube 23, an packer handle 24, an packer emptying tube 25 and an packer switching valve 26.

An obturator guide head 21 is provided at the end of the obturator assembly 20, and an obturator stuffing tube 22 is connected between the obturator guide head 21 and the obturator guide tube 23. An obturator handle 24 and an obturator evacuation tube 25 are provided on the end of the obturator guide tube 23 remote from the obturator guide head 21, the obturator evacuation tube 25 being in communication with the obturator tube 22 via the obturator guide tube 23. An obturator switching valve 26 is provided on the obturator evacuation tube 25.

The obturator assembly 20 is used for deployment of the introducer sheath 12 within the catheter assembly 10. In use, the obturator assembly 20 is inserted from the rear of the catheter mount 13 of the catheter assembly 10 and secured. The button of the obturator handle 24 on the obturator assembly 20 is moved away from the operator until the funnel-shaped mesh structure of the introducer sheath 12 is fully deployed. The obturator assembly 20 is then removed.

With continued reference to fig. 5 and 6, in the present embodiment, the thrombus removing device further includes an outer tube assembly 30, and the outer tube assembly 30 includes an outer tube developing ring 31, an outer tube body 32, an outer tube handle 33, an outer tube evacuation tube 34 and an outer tube switch valve 35.

The outer tube body 32 is connected with the outer tube handle 33, and the outer tube developing ring 31 is disposed at one end of the outer tube body 32 away from the outer tube handle 33. The outer tube emptying tube 34 is provided on the outer tube handle 33 and communicates with the outer tube body 32 through the outer tube handle 33. The outer tube switching valve 35 is provided on the outer tube emptying tube 34.

After the introducer sheath 12 is deployed by the obturator assembly 20, the outer tube assembly 30 may be extended into the catheter assembly 10. The outer tube developing ring 31 can show the position of the outer tube assembly 30 extending into the body, and the outer tube handle 33 can control the extending length of the outer tube body 32 into the body in a threaded connection manner. The outer tube assembly 30 may bind other components that extend into the outer tube body 32 so that the other components can smoothly reach behind a thrombus in a blood vessel.

As shown in fig. 7 to 12, the present invention further includes an inner tube assembly 40, and the inner tube assembly 40 is configured to be inserted into the outer tube assembly 30 during the thrombus removal.

The inner tube assembly 40 includes an inner sheath hose 41, an inner shaft 42, a pulling shaft 43, a thrombolysis assembly 44, a guide head 45, an inner tube distal end developing ring 46, an inner tube adjustment handle 47, and a luer fitting 48.

Luer fitting 48 is connected to inner sheath hose 41. The inner shaft 42 and the traction shaft 43 are all inserted into the inner sheath tube 41. An inner tube adjustment handle 47 is provided on the inner sheath hose 41 and is connected to the traction shaft 43 to move the traction shaft 43 relative to the inner shaft 42.

The thrombolytic device 44 includes a first end adjacent to the inner tube adjustment handle 47 and a second end remote from the inner tube adjustment handle 47, the first end of the thrombolytic device 44 being coupled to the inner shaft 42 and the second end being coupled to the traction shaft 43.

In this embodiment, the thrombolytic component 44 is a mesh structure, such as a nitinol woven mesh. The latch assembly 44 includes an expanded state in which the latch assembly 44 is received within the inner sheath tube 41 and a contracted state in which the latch assembly 44 extends out of the inner sheath tube 41.

The guide head 45 is disposed at an end of the thrombolytic module 44 remote from the inner tube adjustment handle 47 to guide movement of the entire outer tube assembly 30. An inner tube distal visualization ring 46 is disposed between the guide head 45 and the thrombolytic assembly 44 to show the intravascular position of the thrombolytic assembly 44.

In this embodiment, after the obturator assembly 20 deploys the introducer sheath 12 over the catheter assembly 10, the obturator is removed and then the inner tube assembly 40 is extended into the outer tube assembly 30 and the inner tube assembly 40 is extended into the catheter assembly 10 with the outer tube assembly 30. Extending the inner tube assembly 40 and the outer tube assembly 30 until the inner tube distal developing ring 46 is seen to appear at a set distance, e.g., 50mm, from the distal end of the thrombus, which means that the outer tube assembly 30 and the inner tube assembly 40 are located 50mm behind the thrombus, which is located between the introducer sheath 12 and the thrombus removal assembly 44, at which time the outer tube handle 33 on the outer tube assembly 30 is moved to cause relative sliding movement of the inner tube assembly 40 and the outer tube assembly 30, pushing the thrombus removal assembly 44 distally (i.e., away from the end of the operator); the inner tube adjustment handle 47 is adjusted so that the traction shaft 43 is moved proximally (i.e., toward the end of the operator) so that the mesh of the thrombus removal assembly 44 is distracted, thereby clearing the thrombus.

In this embodiment, the inner shaft 42 of the inner tube assembly 40 is disposed non-coaxially with the outer tube body 32 when the inner tube assembly 40 is threaded into the outer tube assembly 30. Through the non-coaxial arrangement of the inner shaft 42 and the outer tube body 32, the inner shaft 42 can swing relative to the outer tube body 32 in a curved blood vessel when the outer tube assembly 30 and the inner tube assembly 40 are stretched into the blood vessel, which reduces damage to the blood vessel wall and vein half-molds, and can be more labor-saving when the outer tube assembly 30 is pulled to move, thereby reducing the requirement on operation precision.

Further, in the present embodiment, the inner shaft 42 is composed of an elastic material such as a memory alloy wire, a spring tube, an elastic plastic cord, an elastic plastic tube, or the like; while the traction shaft 43 is made of a non-elastic material such as a braided plastic tube, a Helical Hollow (HHS) tube, or the like.

The traction shaft 43 is exemplified by HHS pipe, with the inner shaft 42 being a spring pipe. In this embodiment, because the traction shaft 43 is made of the inelastic material of the HHS tube, the HHS tube has the effect of transmitting torque and pushing force well, allowing it to transmit the required pushing force and pulling force for the entire intravascular assembly; because the inner shaft 42 is made of the elastic material of the spring tube, the inner shaft has good flexibility and elasticity, when the outer tube assembly 30 and the inner tube assembly 40 are pulled outwards in the process of removing the thrombus, once a doctor misoperation occurs or the bent blood vessel wall extrudes the outer tube assembly 30, the thrombus removing assembly 44 has a certain buffering effect when the traction force is increased, so that the damage to the blood vessel wall can be avoided, and the pain of a patient is reduced; further, by the above arrangement, the non-coaxial arrangement of the outer tube body 32 and the inner shaft 42 can be further maintained; meanwhile, due to the non-coaxial arrangement of the inner shaft 42 and the outer tube body 32, in the curved blood vessel, the thrombus removing assembly 44 can swing along with the curved blood vessel after being pulled by the outside, so that the possibility of damaging the blood vessel wall and vein valve is further reduced, and more labor is saved when the outer tube assembly 30 and the inner tube assembly 40 are pulled to move.

In some embodiments, the pull shaft 43 is formed as a braided hollow cable or HHS tube (the pull shaft 43 cannot be a solid shaft), and the inner shaft 42 is formed as a hollow tube or spring tube or solid wire, where the inner shaft 402 and the pull shaft 403 are off-axis within the lumen of the outer tube assembly 30 due to the particular configuration of the thrombectomy assembly 44.

In some embodiments, the traction shaft 43 is made of HHS tubing and the inner shaft 42 is made of spring tubing. After the traction shaft 43 is made into the HHS pipe, the HHS pipe has excellent whip-free and highly anti-kink properties, so that the traction shaft 43 and the inner shaft 42 are not easily jammed with each other, because the HHS pipe has good torque and thrust transmitting properties, so that it is suitable for transmitting thrust and tension to the whole assembly entering the human body.

In some embodiments, the pulling shaft 43 is formed as a hollow tube or spring and the inner shaft 42 is formed as a solid wire or braided cable or HHS tube, where the inner shaft 42 and the pulling shaft 43 are off-axis within the outer tube assembly 30 due to the particular configuration of the thrombolytic assembly 44.

In some embodiments, the traction shaft 43 is made as a spring tube and the inner shaft 42 is made as a HHS tube material. After the traction shaft 43 is made into a spring tube, the spring has good flexibility and elasticity due to the spring tube, and the structure of the blood vessel is complex in bending, so that the assembly has good adaptability and elasticity when entering a human body, and the wall of the blood vessel is not easy to damage. After the inner shaft 42 is made into the HHS tube, the HHS tube has good torque and thrust transmission performance, so that the HHS tube is suitable for transmitting the thrust and the pulling force for the coring assembly, has excellent whip-free performance and high torsion resistance, and is more compliant with the complex curved vascular structure in the process of thrombus extraction and pulling, thereby reducing the damage to the vascular wall; the traction shaft and the inner shaft which are not coaxial have lower use requirements for operators, and the cost and the labor cost in the manufacturing and processing technology of the instrument are lower because the processing and manufacturing requirements are lower; the traction shaft 43 or the inner shaft 42 may comprise the following materials: steel cables, solid wires, memory alloy wires, springs, elastic plastic cords, elastic plastic tubes, plastic tubes with braiding layers, HHS tubes (here, the traction shaft 43 cannot be a solid shaft).

Further, in this embodiment, the thrombectomy device is not provided with an intermediate shaft. In the prior art, the main function of the intermediate shaft is to replace the fine inner shaft 42 as a traction-bearing structure, and in this embodiment, since the outer tube body 32 is made of an inelastic material, the inner shaft 42 is made of an elastic material, and the inner shaft 42 is disposed non-coaxially with the outer tube body 32. This enables the inner shaft 42 itself to act as a traction bearing structure to omit the intermediate shaft; further, by omitting the intermediate shaft, the gap between the inner tube assembly 40 and the outer tube assembly 30 can be increased to maintain a non-coaxial arrangement between the inner shaft 42 and the outer tube body 32. Further, by omitting the intermediate shaft and disposing the inner shaft 42 non-coaxially with the outer tube body 32, the thrombus removing device has lower process requirements, lower requirements for operators, lower cost and easy popularization and use. Further, by arranging the inner shaft 42 and the traction shaft 43 in double shafts and connecting the double shafts to both ends of the thrombus removing assembly 44, respectively, the inner shaft 42 and the traction shaft 43 can take traction force instead of the middle shaft.

Further, please continue to refer to fig. 9 to 11. In this embodiment, the thrombus removing assembly 44 includes a connecting portion 441 and a mesh body 442, wherein one end of the connecting portion 441 is connected to the mesh body 442, and the other end is connected to the inner shaft 42. The traction shaft 43 is connected to the end of the web body 442 remote from the connection.

More specifically, the connection portion 441 is plural. One end of each connecting portion 441 is disposed at intervals along the circumferential direction of the mesh body 442, and is connected to the mesh body 442, and the other end is connected to the inner shaft 42. The length of the connection portion 441 is not equal so that the inner shaft 42 connected to the connection portion 441 is offset from the axis of the net body 442. The design of the thrombus removal assembly 44 is not limited to the connection portion 441 and the mesh body 442, and the inner shaft 42 and the inner sheath tube 41 can be disposed in a non-coaxial manner, so as to ensure that the inner shaft 42 and the outer tube body 32 are disposed in a non-coaxial manner.

In the present embodiment, the connecting portion 441 is used to connect the mesh body 442 to the inner shaft 42, and is also capable of cutting and crushing thrombus when performing thrombus extraction. The mesh body 442 can house thrombus when deployed.

With continued reference to fig. 12, the thrombus removing device provided by the present invention further includes a syringe 50. At the rear of the pull rod of the syringe 50, a pull ring 51 is also provided to facilitate the user's operation.

In the present embodiment, the thrombus taking operation can be performed by:

the catheter body 11 of the catheter assembly 10 is first inserted into the open vessel at the vessel adjacent to the popliteal access site, femoral access site or endocervical access site of the thrombus, the guidewire is advanced into the vessel along the lumen of the catheter assembly 10 until it extends to the distal end of the thrombus (i.e., the end distal to the operator), and the obturator assembly 20 is inserted into the catheter holder 13 of the catheter assembly 10 and secured. The obturator handle 24 button on the obturator assembly 20 is moved toward the end remote from the operator until the funnel-shaped mesh structure of the introducer sheath 12 is fully deployed and the obturator is removed. The outer tube assembly 30 and inner tube assembly 40, which are assembled together, are then loaded into the catheter assembly 10, and the outer tube assembly 30, inner tube assembly 40 are extended until the distal visualization ring of the outer tube assembly 30 is seen to be present 50mm distal of the thrombus, indicating that the outer tube assembly 30 and inner tube assembly 40 are located 50mm behind the thrombus. At this time, the outer tube handle 33 button on the outer tube assembly 30 is moved to the end far away from the operator, so that the inner tube assembly 40 and the outer tube assembly 30 are relatively slid, the thrombus removing assembly 44 is pushed out distally, the inner tube adjusting handle 47 on the inner tube assembly 42 is adjusted, the pulling shaft 43 is moved to the end close to the user, the thrombus removing assembly 44 is opened until the pulling shaft extends to the vascular wall, the outer tube assembly 30 and the inner tube assembly 40 are pulled synchronously to the end close to the user until the thrombus removing assembly 44 is pulled to 1/3 of the funnel-shaped basket structure of the introducing sheath 12, the catheter assembly evacuation valve 15 of the upper catheter assembly 10 is connected by the syringe 50, the catheter assembly evacuation valve 15 is opened, the extracted thrombus is finely crushed, the catheter assembly evacuation valve 15 is closed, the outer tube assembly 30 and the inner tube assembly 40 are removed, and the thrombus of the basket is cleaned.

As shown in fig. 13 to 15, the second embodiment of the present invention is substantially the same as the first embodiment except that in this embodiment, the outer tube body 32 is made of an elastic material such as a spring tube; while the inner shaft 42 is made of a non-elastic material such as HHS tubing.

Because the spring tube has good flexibility and elasticity, the structure of the blood vessel is complex, so that the assembly has good adaptability and compliance when entering the human body, and the wall of the blood vessel is not easy to be damaged. After the inner shaft 42 is made into the HHS tube, the HHS tube has good torque and thrust transmission performance, so that the HHS tube is suitable for transmitting the thrust and the tensile force to the thrombus removing assembly 44, has excellent whip-free performance and high torsion resistance, and is more compliant with the complex bent vascular structure in the process of thrombus removing and pulling, thereby reducing the damage to the vascular wall; the outer tube body 32 and the inner shaft 42 are not coaxial, and the intermediate shaft is reduced, resulting in reduced operator use requirements, and less cost and labor costs in the manufacturing process of the instrument due to the relatively lower manufacturing requirements.

That is, in the present embodiment, one of the traction shaft 43 and the inner shaft 42 is made of an elastic material, and the other of the traction shaft 43 and the inner shaft 42 is made of a non-elastic material.

In summary, in the present invention, by the non-coaxial arrangement of the inner shaft 42 and the outer tube body 32, the adaptability of the thrombus removing device to the bending of the blood vessel can be improved, the damage to the blood vessel wall and the vein half-mold is reduced, and the labor can be saved more and the requirement for the operation precision can be reduced when the outer tube assembly 30 is pulled to move.

Further, by providing both the pulling shaft 43 and the inner shaft 42 within the inner sheath tube 41 and connecting the pulling shaft 43 and the inner shaft 42 to both ends of the thrombolytic module 44, respectively, non-coaxiality of the inner shaft 42 and the outer tube body 32 can be ensured.

Further, by setting the inner shaft 42 offset from the axis of the mesh body 442, the non-coaxiality of the inner shaft 42 and the outer tube body 32 can be ensured, so that the thrombus taking device is more suitable for shuttling in curved blood vessels, is not easy to cause jamming and is not easy to damage the blood vessels and vein walls

Further, by making one of the inner shaft 42 and the traction shaft 43 of an elastic material and the other of the same of a non-elastic material, it is possible to secure transmission of pushing force and pulling force while accommodating bending of a blood vessel. With the inner shaft 42 disposed non-coaxially with the outer tube body 32, this can further reduce trauma to the vessel wall and venous valves, reduce pain to the patient during treatment, and reduce skill requirements for use by medical personnel during treatment.

Further, by eliminating the intermediate shaft, the gap between the inner tube assembly 40 and the outer tube assembly 30 can be increased to maintain a non-coaxial arrangement between the inner shaft 42 and the outer tube body 32. Further, by omitting the intermediate shaft and disposing the inner shaft 42 non-coaxially with the outer tube body 32, the thrombus removing device has lower process requirements, lower requirements for operators, lower cost and easy popularization and use.

The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. A thrombus taking device, which is characterized in that: including outer tube subassembly and inner tube subassembly, outer tube subassembly includes the outer tube body, the inner tube subassembly wears to locate in the outer tube body, the inner tube subassembly includes interior sheath hose, interior axle and bolt taking assembly, interior axle wears to locate in the interior sheath hose, bolt taking assembly with interior axle links to each other, interior axle with outer tube body non-coaxial setting.

2. The thrombolytic device of claim 1, wherein: the inner tube assembly further comprises a traction shaft, the traction shaft penetrates through the inner sheath hose, the inner tube assembly further comprises an inner tube adjusting handle, and the inner tube adjusting handle is arranged on the inner sheath hose and connected with the traction shaft to drive the traction shaft to move relative to the inner shaft.

3. The thrombolytic device of claim 2, wherein: the thrombus taking assembly comprises a first end close to the adjusting handle and a second end far away from the adjusting handle, the first end of the thrombus taking assembly is connected with the inner shaft, and the second end of the thrombus taking assembly is connected with the traction shaft.

4. The thrombolytic device of claim 2, wherein: the thrombus taking assembly is of a net-shaped structure, the thrombus taking assembly comprises a connecting portion and a net-shaped body, one end of the connecting portion is connected with the net-shaped body, the other end of the connecting portion is connected with the inner shaft, and the traction shaft is connected with one end of the net-shaped body, which is far away from the connecting portion.

5. The thrombolytic device of claim 4, wherein: the utility model discloses a net body, including net body, connecting portion, inner shaft, net body, connecting portion, net body, the connecting portion is a plurality of, a plurality of connecting portion's one end all with the inner shaft links to each other, and the other end is followed the circumference interval setting of net body, and connect in on the net body.

6. The thrombolytic device of claim 5, wherein: the lengths of the plurality of connection portions are not equal so that the inner shaft connected to the connection portions is offset from the axis of the mesh body.

7. The thrombolytic device of claim 1, wherein: one of the inner tube assembly and the inner shaft is made of an elastic material, and the other of the inner tube assembly and the inner shaft is made of a non-elastic material.

8. The thrombolytic device of claim 7, wherein: the elastic material comprises a memory alloy wire, a spring tube, an elastic plastic rope or an elastic plastic tube; the inelastic material includes steel cable, solid wire, plastic tube with braid or spiral hollow tube.

9. The thrombolytic device of claim 6, wherein: the thrombus taking component is not provided with an inner tube.

10. The thrombolytic device of any of claims 1-9, wherein: still include the pipe subassembly, the pipe subassembly includes pipe body, introducing the sheath, pipe mounting, pipe subassembly evacuation pipe and pipe subassembly exhaust valve, the one end of pipe body with the pipe mounting links to each other, and the other end with introducing the sheath links to each other, pipe subassembly evacuation pipe set up in on the pipe mounting, and through the pipe mounting with the inside pipeline intercommunication of pipe body, pipe subassembly exhaust valve set up in on the pipe subassembly evacuation pipe, outer tube subassembly and the inner tube subassembly wears to locate in the pipe body.