Thrombectomy device for pulmonary embolism

Abstract

The present invention relates to a thrombus removal device for pulmonary embolism, comprising a thrombus removal grid frame; the thrombus removal grid frame is connected to the left end of a push guide wire by welding, the right end of the push guide wire is arranged on a guide wire twister, a microcatheter is slidably sleeved on the push guide wire, an intermediate catheter is slidably sleeved on the microcatheter, a guide catheter is slidably sleeved on the intermediate catheter, the microcatheter is connected to a first Y-type connector through a Luer joint, the intermediate catheter is connected to a second Y-type connector through a Luer joint, the guide catheter is connected to a third Y-type connector through a Luer joint, the guide catheter is connected to a first syringe through a three-way valve and a third Y-type connector, the intermediate catheter is connected to a second syringe through a three-way valve and a second Y-type connector, and a thrombus removal grid frame protective cover is sleeved on the thrombus removal grid frame. The thrombus removal device involved in the present invention can better match the size of the blood vessel and more firmly fit with the thrombus, so as to remove newly formed acute and old thrombi.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a thrombus removal device for pulmonary embolism. Background Art

[0002] Most of the thrombus removal frames currently on the market are used to treat intracranial thrombosis. For example, the "intracranial thrombus removal device" disclosed in Chinese patent CN203379185U includes a radially expandable thrombus removal frame. When in use, the thrombus removal frame is placed in a microcatheter, the thrombus removal frame is connected to a guide wire, the microcatheter is sent to the thrombus position, and then the microcatheter is removed. The thrombus removal frame is released and embedded in the thrombus without the restriction of the microcatheter, forming a retention force between the thrombus and the thrombus, and then the guide wire is pulled to remove the thrombus removal frame from the blood vessel, and the thrombus is also removed from the blood vessel with the thrombus removal frame, completing the thrombus removal process.

[0003] Pulmonary embolism refers to a pathological and clinical condition caused by an impaction that enters the pulmonary artery and its branches, blocking the blood supply to the tissue. Common emboli are blood clots, and the rest are rare neoplastic cells, fat droplets, bubbles, intravenous drug particles, and even pulmonary vascular blockage caused by the tip of the catheter. Some pulmonary emboli can dissolve on their own without treatment, but studies have found that the mortality rate of patients with untreated pulmonary embolism will exceed 20%. Conventional treatments for thrombosis are anticoagulation and thrombolytic therapy, which cannot achieve good therapeutic effects and have many limitations on the patient's condition.

[0004] Currently, the medical treatment for pulmonary embolism is balloon dilatation, which dilates the narrowed or occluded pulmonary artery to improve the blood flow there. There is no thrombectomy device used on the pulmonary artery. Summary of the invention

[0005] The present invention aims at the deficiencies in the prior art and provides a thrombus removal device for pulmonary embolism. To achieve the above-mentioned purpose, the present invention adopts the following technical scheme, including a thrombus removal grid, a push guide wire, a guide wire twister, a microcatheter, an intermediate catheter, a guide catheter, a first Y-type connector, a second Y-type connector, a third Y-type connector, a Luer joint, a first syringe, a second syringe, and a three-way valve; wherein the thrombus removal grid is connected to the left end of the push guide wire by welding, the guide wire twister is arranged at the right end of the push guide wire, the microcatheter is slidably sleeved on the push guide wire, the intermediate catheter is slidably sleeved on the microcatheter, the guide catheter is slidably sleeved on the intermediate catheter, the first Y-type connector is connected to the microcatheter through the Luer joint, the second Y-type connector is connected to the intermediate catheter through the Luer joint, the third Y-type connector is connected to the guide catheter through the Luer joint, the first syringe is connected to the guide catheter through the three-way valve and the third Y-type connector, and the second syringe is connected to the intermediate catheter through the three-way valve and the second Y-type connector.

[0006] Furthermore, the embolus removal device for pulmonary embolism also includes a embolus removal grid protection cover, which is sleeved on the outside of the embolus removal grid.

[0007] Furthermore, Luer connectors are all arranged at the right ends of the microcatheter, the intermediate catheter and the guide catheter.

[0008] Further, the first Y-type connector includes a first Y-type connector side branch and a first hemostatic valve, the second Y-type connector includes a second Y-type connector side branch and a second hemostatic valve, and the third Y-type connector includes a third Y-type connector side branch and a third hemostatic valve.

[0009] Furthermore, the second Y-type connector side branch is connected to the second syringe through a three-way valve, and the third Y-type connector side branch is connected to the first syringe through a three-way valve.

[0010] Further, the first hemostatic valve is arranged at the left end of the guidewire twister, the second hemostatic valve is arranged at the left end of the microcatheter, and the third hemostatic valve is arranged at the left end of the intermediate catheter.

[0011] Furthermore, the push guide wire has a structure with a gradually increasing diameter from the left end to the right end, the diameter of the left end of the push guide wire is 0.3 mm, and the diameter of the right end of the push guide wire is 0.46 mm.

[0012] Furthermore, a gap of 0.07 mm is provided between the thrombus removal grid and the microcatheter, a gap of 0.69 mm is provided between the microcatheter and the intermediate catheter, and a gap of 0.38 mm is provided between the intermediate catheter and the guide catheter.

[0013] Furthermore, the thrombus removal guide head of the thrombus removal grid is connected to the push guide wire by welding, and a plurality of thrombus removal mesh holes are arranged on the thrombus removal grid, and a plurality of developing marking blocks are arranged on the thrombus removal mesh holes.

[0014] Furthermore, the length of the thrombus removal grid protection cover is greater than the length of the thrombus removal grid.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a thrombus removal device for pulmonary embolism, comprising a thrombus removal grid; the thrombus removal grid is connected to a push guide wire by welding, a guide wire twister is arranged at the right end of the push guide wire, a microcatheter is slidably sleeved on the push guide wire, an intermediate catheter is slidably sleeved on the microcatheter, a guide catheter is slidably sleeved on the intermediate catheter, the microcatheter is connected to a first Y-type connector via a Luer connector, the intermediate catheter is connected to a second Y-type connector via a Luer connector, and the guide catheter is connected to a third Y-type connector via a Luer connector The guide catheter and the intermediate catheter are connected to the syringe through a three-way valve respectively, and a protective sleeve of the thrombus removal frame is also provided outside the thrombus removal frame; the thrombus blocked in the pulmonary blood vessel is removed by mechanical means through the mesh holes on the thrombus removal frame being embedded with the thrombus, so as to achieve the purpose of blood vessel recanalization and blood flow restoration. The thrombus removal frame of the thrombus removal device for pulmonary embolism is designed with different numbers of developing marks according to different specifications. The thrombus removal frame adopts a nickel-titanium alloy mesh curling structure with staggered mesh holes, which can better match the size of the blood vessel and more firmly embed with the thrombus.

[0016] In particular, the thrombus removal device for pulmonary embolism has a thrombus removal grid and a push guide wire connected by welding, which can effectively enhance the connection strength between the two. The push guide wire adopts a guide wire structure with a gradually changing diameter. The diameter of the right end of the push guide wire is 0.46 mm, which can provide better passability. The diameter of the left end of the push guide wire is 0.3 mm, which can provide better pushing force, thereby removing newly formed acute and old thrombi, helping patients restore their original blood vessels, and improving the oxygen content of the blood and the quality of life of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the embolic removal device for pulmonary embolism of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the development marking block of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the thrombus removal grid protective cover of the present invention.

[0020] Description of reference numerals:

[0021] 1-Luer connector, 2-third Y-type connector, 3-third Y-type connector side branch, 4-three-way valve, 5-first syringe, 6-second Y-type connector, 7-second Y-type connector side branch, 8-second syringe, 9-first Y-type connector, 10-first Y-type connector side branch, 11-embolism removal mesh, 12-guide catheter, 13-third hemostatic valve, 14-intermediate catheter, 15-second hemostatic valve, 16-microcatheter, 17-first hemostatic valve, 18-guidewire twister, 19-push guidewire, 20-development marking block, 21-embolism removal mesh protective cover, 22-embolism removal guide head, 23-embolism removal mesh. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 and Figure 3 As shown, the present embodiment provides a thrombus removal device for pulmonary embolism, comprising: a thrombus removal grid 11, a push guide wire 19, a guide wire twister 18, a microcatheter 16, an intermediate catheter 14, a guide catheter 12, a first Y-type connector 9, a second Y-type connector 6, a third Y-type connector 2, a Luer connector 1, a first syringe 5, a second syringe 8, a three-way valve 4, and a thrombus removal grid protection cover 21; wherein the thrombus removal grid 11 is connected to the left end of the push guide wire 19 by welding, the guide wire twister 18 is arranged at the right end of the push guide wire 19, the microcatheter 16 is slidably sleeved on the push guide wire 19, and the intermediate catheter 14 is provided with a guide catheter 12, a first Y-type connector 9, a second Y-type connector 6, a third Y-type connector 2, a Luer connector 1, a first syringe 5, a second syringe 8, a three-way valve 4, and a thrombus removal grid protection cover 21; wherein, the thrombus removal grid 11 is connected to the left end of the push guide wire 19 by welding, the guide wire twister 18 is arranged at the right end of the push guide wire 19, the microcatheter 16 is slidably sleeved on the push guide wire 19, and the intermediate catheter 14 is provided with a guide catheter 12, a first Y-type connector 9, a second Y-type connector 6, a third Y-type connector 2, a Luer connector 1, a first syringe 5, a second syringe 8, a three-way valve 4, and a thrombus removal grid protection cover 21; The catheter 14 is slidably mounted on the microcatheter 16, the guide catheter 12 is slidably mounted on the intermediate catheter 14, the first Y-type connector 9 is connected to the microcatheter 16 via the Luer connector 1, the second Y-type connector 6 is connected to the intermediate catheter 14 via the Luer connector 1, the third Y-type connector 2 is connected to the guide catheter 12 via the Luer connector 1, the first syringe 5 is connected to the guide catheter 12 via the three-way valve 4 and the third Y-type connector 2, the second syringe 8 is connected to the intermediate catheter 14 via the three-way valve 4 and the second Y-type connector 6, and the thrombus removal frame protective cover 21 is mounted on the outside of the thrombus removal frame 11.

[0024] Furthermore, the Luer connectors 1 are arranged at the right ends of the microcatheter 16, the intermediate catheter 14 and the guide catheter 12, and are used to connect the first Y-type connector 9 with the microcatheter 16, the second Y-type connector 6 with the intermediate catheter 14, and the third Y-type connector 2 with the guide catheter 12 respectively.

[0025] Furthermore, the first Y-type connector 9 includes a first Y-type connector side branch 10 and a first hemostatic valve 17 , the second Y-type connector 6 includes a second Y-type connector side branch 7 and a second hemostatic valve 15 , and the third Y-type connector 2 includes a third Y-type connector side branch 3 and a third hemostatic valve 13 .

[0026] Furthermore, the second Y-type connector branch 7 is connected to the second syringe 8 through the three-way valve 4 , and the third Y-type connector branch 3 is connected to the first syringe 5 through the three-way valve 4 .

[0027] Further, the first hemostatic valve 17 is arranged at the left end of the guidewire twister 18 , the second hemostatic valve 15 is arranged at the left end of the microcatheter 16 , and the third hemostatic valve 13 is arranged at the left end of the intermediate catheter 14 .

[0028] Furthermore, the push guide wire 19 has a structure with a gradually increasing diameter from the left end to the right end. The diameter of the left end of the push guide wire 19 is 0.3 mm, and the diameter of the right end of the push guide wire 19 is 0.46 mm.

[0029] Furthermore, a gap of 0.07 mm is provided between the thrombus removal grid 11 and the microcatheter 16 , a gap of 0.69 mm is provided between the microcatheter 16 and the intermediate catheter 14 , and a gap of 0.38 mm is provided between the intermediate catheter 14 and the guide catheter 12 .

[0030] Furthermore, the length of the thrombus removal frame protection cover 21 is greater than the length of the thrombus removal frame 11, which can effectively protect the cleanliness and integrity of the thrombus removal frame 11 when not in use.

[0031] like Figure 2 As shown, the thrombus removal guide head 22 of the thrombus removal frame 11 is connected to the push guide wire 19 by welding, and a plurality of thrombus removal mesh holes 23 are arranged on the thrombus removal frame 11, and a plurality of development marking blocks 20 are arranged on the thrombus removal mesh holes 23. When in use, the development marking blocks 20 can enable the user to clearly see the position of the thrombus removal frame 11 through X-ray development.

[0032] The following is a brief introduction to the operation method of the embolic removal device for pulmonary embolism of the present invention;

[0033] The thrombus removal frame 11 is compressed in the thrombus removal frame protective cover 21, the thrombus removal frame protective cover 21 is sent to the interface of the microcatheter 16, the thrombus removal frame 11 is pushed into the microcatheter 16, the thrombus removal frame protective cover 21 is removed, the microcatheter 16 is withdrawn, the thrombus removal frame 11 is released, the thrombus removal frame 11 is fully embedded with the thrombus, the thrombus removal frame 11 and the microcatheter 16 are pulled back as a whole to complete the thrombus removal.

[0034] In short, the present invention can effectively improve the success rate of thrombus capture, prevent thrombus escape, shorten the operation time, and reduce the occurrence of complications.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thrombus removal device for pulmonary embolism, characterized in that: include: Thrombectomy grid (11), guide wire pusher (19), guide wire twister (18), microcatheter (16), intermediate catheter (14), guide catheter (12), first Y-type connector (9), second Y-type connector (6), third Y-type connector (2), Luer connector (1), first syringe (5), second syringe (8), three-way valve (4); The thrombus removal grid (11) is connected to the left end of the push guide wire (19) by welding, the guide wire twister (18) is arranged at the right end of the push guide wire (19), the microcatheter (16) is slidably mounted on the push guide wire (19), the intermediate catheter (14) is slidably mounted on the microcatheter (16), and the guide catheter (12) is slidably mounted on the intermediate catheter (14); The first Y-shaped connector (9) is connected to the microcatheter (16) via the Luer connector (1), the second Y-shaped connector (6) is connected to the intermediate catheter (14) via the Luer connector (1), and the third Y-shaped connector (2) is connected to the guide catheter (12) via the Luer connector (1); The first syringe (5) is connected to the guide catheter (12) via the three-way valve (4) and the third Y-shaped connector (2); The second syringe (8) is connected to the intermediate conduit (14) via the three-way valve (4) and the second Y-type connector (6); The push guide wire (19) has a structure with a gradually increasing diameter from the left end to the right end, the left end diameter of the push guide wire (19) is 0.3 mm, and the right end diameter of the push guide wire (19) is 0.46 mm; A gap of 0.07 mm is provided between the thrombus removal grid (11) and the microcatheter (16), a gap of 0.69 mm is provided between the microcatheter (16) and the intermediate catheter (14), and a gap of 0.38 mm is provided between the intermediate catheter (14) and the guide catheter (12); The thrombus removal guide head (22) of the thrombus removal grid (11) is connected to the push guide wire (19) by welding, and a plurality of thrombus removal mesh holes (23) are arranged on the thrombus removal grid (11), and a plurality of development marking blocks (20) are arranged on the thrombus removal mesh holes (23).

2. The embolus removal device for pulmonary embolism according to claim 1, characterized in that: The thrombus removal device for pulmonary embolism further comprises a thrombus removal grid protection sleeve (21), wherein the thrombus removal grid protection sleeve (21) is sleeved on the outside of the thrombus removal grid (11).

3. The embolus removal device for pulmonary embolism according to claim 1, characterized in that: The Luer connectors (1) are all arranged at the right ends of the microcatheter (16), the intermediate catheter (14) and the guide catheter (12).

4. The embolus removal device for pulmonary embolism according to claim 1, characterized in that: The first Y-type connector (9) includes a first Y-type connector side branch (10) and a first hemostatic valve (17), the second Y-type connector (6) includes a second Y-type connector side branch (7) and a second hemostatic valve (15), and the third Y-type connector (2) includes a third Y-type connector side branch (3) and a third hemostatic valve (13).

5. The embolus removal device for pulmonary embolism according to claim 4, characterized in that: The second Y-shaped connector branch (7) is connected to the second syringe (8) through the three-way valve (4), and the third Y-shaped connector branch (3) is connected to the first syringe (5) through the three-way valve (4).

6. The embolus removal device for pulmonary embolism according to claim 4, characterized in that: The first hemostatic valve (17) is arranged at the left end of the guidewire twister (18), the second hemostatic valve (15) is arranged at the left end of the microcatheter (16), and the third hemostatic valve (13) is arranged at the left end of the intermediate catheter (14).

7. The embolus removal device for pulmonary embolism according to claim 2, characterized in that: The length of the thrombus removal grid protection cover (21) is greater than the length of the thrombus removal grid (11).

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