A new type of thrombus aspiration catheter

Abstract

The present invention discloses a novel thrombus aspiration catheter, comprising a main pipeline (1) and a branch pipeline (2) arranged on one side of the main pipeline, the main pipeline and the branch pipeline are connected by a three-way pipe (3), the main pipeline comprises a double-lumen tube (4), a flared tube (5) and a composite tube (6) connected in sequence, the other end of the three-way pipe is also provided with a fixed valve (7), a metal stirring wire (8) and a contraction wire (9) are arranged through the main pipeline, a spiral coil (11) is arranged at one end of the metal stirring wire, the other end of the metal stirring wire and one end of the contraction wire both pass through the fixed valve, the other end of the metal stirring wire is adaptively connected to a handle (10), one end of the branch pipeline is connected to a connecting pipe (12), one end of the connecting pipe is connected to a stopcock (13), and one end of the stopcock is adaptively connected to a syringe (14). The present invention adopts a novel thrombus aspiration catheter, which can easily realize the aspiration of thrombus, has a simple structure and is easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a novel thrombus aspiration catheter. Background Art

[0002] With the acceleration of modern life, changes in eating habits and the influence of social and psychological factors, the mortality rate of cardiovascular and cerebrovascular diseases has exceeded that of malignant tumors, becoming the number one killer endangering people's health. Data show that the number of people with cardiovascular diseases in my country has reached 230 million, among which the number of patients with acute myocardial infarction (AMI) has exceeded 2 million, with at least 500,000 to 800,000 new cases each year, and the trend is increasing year by year. The number of people who die from acute myocardial infarction exceeds 1 million each year. It is predicted that from 2015 to 2030, there will be 21 million new patients with acute coronary artery disease in China, and at least 7 million cardiac deaths will occur.

[0003] Atherosclerosis is the pathological basis for acute cardiovascular and cerebrovascular events. The main causes of acute cardiovascular events are local atherosclerotic plaque rupture and thrombosis. Thrombosis depends on the vulnerability of atherosclerotic plaques. Vulnerable plaques are prone to plaque rupture and thrombosis, which leads to the occurrence of acute coronary syndrome. At present, the most effective treatment for AMI is emergency percutaneous coronary intervention (PCI) of the infarction-related artery for blood supply reconstruction. Direct PCI treatment, after the stent is placed, under the compression of the balloon or stent, on the one hand, platelets are easily activated by the exposed lipids in the unstable plaque, forming microthrombi that adhere and aggregate in the lesion blood vessel, leading to microcirculation obstruction; on the other hand, thrombi are easy to break and fall off, causing thrombus fragments to flow to the distal coronary artery, leading to distal vascular obstruction, resulting in the phenomenon of "slow blood flow". This greatly increases the difficulty of interventional treatment and the mortality rate of AMI patients. Therefore, how to avoid acute and subacute thrombosis in the stent and no-reflow caused by coronary microcirculation disorders during PCI treatment has become a major problem facing emergency PCI.

[0004] Thrombus aspiration is a new method used in clinical practice in recent years. Its purpose is to quickly extract the thrombus blocking the diseased blood vessels through mechanical action. In theory, it can reduce the thrombus load and microvascular embolism, change the coronary blood flow, and reduce the incidence of postoperative "slow blood flow" and "no reflow". It has also been further verified in clinical practice that the use of thrombus aspiration catheters combined with drugs can significantly reduce the incidence of no reflow, improve the blood flow of target vessels, and improve clinical prognosis. It has good short-term and long-term effects on the treatment of patients with acute myocardial infarction. After thrombus aspiration, 2 / 3 of the cases do not need balloon pre-dilatation and can directly implant stents, saving medical expenses. During interventional treatment, due to the complex cardiovascular structure, the thrombus aspiration effect is easily affected by the anatomical morphology and thrombus characteristics of the coronary artery, especially in the case of severe stenosis, calcification, thrombus at the distal end of tortuous lesions, and thrombus stubbornly attached to the coronary artery wall, making thrombus aspiration difficult. Secondly, when encountering large and highly viscous thrombi, blockage is easy to occur and it is difficult to handle. Therefore, it is urgent for those skilled in the art to develop a new type of thrombus aspiration catheter. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies in the above-mentioned prior art and to provide a new type of thrombus aspiration catheter with good operability, simple structure and convenient operation.

[0006] In order to achieve the above-mentioned invention object, the technical solution provided by the present invention is as follows: a novel thrombus aspiration catheter, the aspiration catheter comprises a main pipeline and a branch pipeline arranged on one side of the main pipeline, the main pipeline and the branch pipeline are connected by a three-way pipe, the main pipeline comprises a double-lumen tube, a flared tube and a composite tube connected in sequence, the other end of the three-way pipe is also provided with a fixed valve, a metal stirring wire and a contraction wire are penetrated in the main pipeline, one end of the metal stirring wire is provided with a spiral coil, the other end of the metal stirring wire and one end of the contraction wire both pass through the fixed valve, and the other end of the metal stirring wire is adaptively connected to a handle, one end of the branch pipeline is connected to a connecting pipe, one end of the connecting pipe is connected to a stopcock, and one end of the stopcock is adaptively connected to a syringe;

[0007] The double-lumen tube comprises an outer tube and an inner tube eccentrically arranged in the outer tube lumen, the outer tube lumen is used to transport thrombus substances, and the inner tube lumen is used to install a guide wire;

[0008] The cross-sectional lumen structure of the expanded portion of the expanded tube is the same as that of the double-lumen tube. The expanded portion of the expanded tube is adaptably connected to the composite tube and the outer tube of the double-lumen tube, so that the outer tube lumen is connected to the composite tube. The other end of the expanded tube is set as the inlet end of the guide wire and is connected to the inner tube lumen.

[0009] Preferably, the composite pipe is a three-section composite structure, including a front end composite pipe, a middle end composite pipe and a rear end composite pipe connected in sequence, the front end composite pipe including, from the inside to the outside, a front end inner layer, a front end interlayer and a front end outer layer stacked in sequence, the middle end composite pipe including, from the inside to the outside, a middle end inner layer, a middle end interlayer and a middle end outer layer stacked in sequence, and the rear end composite pipe including, from the inside to the outside, a rear end inner layer, a rear end interlayer and a rear end outer layer stacked in sequence.

[0010] Preferably, the inner layer of the front end, the inner layer of the middle end and the inner layer of the rear end are all polytetrafluoroethylene film layers, the outer layer of the front end, the outer layer of the middle end and the outer layer of the rear end are all polyamide layers, the front end interlayer is a stainless steel wire woven mesh layer, the middle end interlayer is a nickel-titanium wire woven mesh layer, and the rear end interlayer is a nickel-titanium wire coil layer.

[0011] Preferably, the fixed valve includes a valve body, a spherical valve plug and a rotary handle, the spherical valve plug is arranged in the valve body, and the rotary handle is arranged on the valve body and is adaptably connected to the spherical valve plug, the other end of the metal stirring wire and one end of the contraction wire both pass through the spherical valve plug and lead outward, and the rotary handle is used to adjust the position of the fixed metal stirring wire.

[0012] Preferably, the spiral coil comprises a spiral metal coil and an elastic metal coil adaptably connected to the spiral metal coil, the spiral metal coil is adaptably connected to the metal stirring wire, and the elastic metal coil is adaptably connected to the contraction wire.

[0013] Preferably, one end of the double-lumen tube is provided with an oblique cut, and a metal molybdenum layer is further provided on the front outer surface of the double-lumen tube, and the thickness of the metal molybdenum layer is in the range of 0.04-0.06 mm.

[0014] Preferably, the outer tube has a length of 70-90 mm, an inner diameter of 1.21-1.42 mm, and an outer diameter of 2.12-2.44 mm; the composite tube has a length of 1240-1380 mm, an inner diameter of 1.11-1.33 mm, and an outer diameter of 1.99-2.33 mm.

[0015] Preferably, the length of the front end composite tube is in the range of 500-650 mm, the length of the middle end composite tube is in the range of 150-200 mm, and the length of the rear end composite tube is in the range of 300-450 mm.

[0016] Preferably, the metal stirring wire has a diameter of 0.08-0.15 mm and a length of 1600-1750 mm.

[0017] Preferably, the three-way pipe is made of high molecular weight polyethylene plastic, and the fixed valve is made of polypropylene plastic.

[0018] Based on the above technical solution, the present invention has the following technical advantages compared with the prior art:

[0019] The present invention adopts a novel thrombus aspiration catheter, which can easily achieve the aspiration of thrombus, has a simple structure and is easy to operate, and utilizes a composite tube with three sections of composite structure, including a front end composite tube, a middle end composite tube and a rear end composite tube connected in sequence, the front end composite tube includes a front end inner layer, a front end sandwich and a front end outer layer stacked in sequence from the inside to the outside, the middle end composite tube includes a middle end inner layer, a middle end sandwich and a middle end outer layer stacked in sequence from the inside to the outside, the rear end composite tube includes a rear end inner layer, a rear end sandwich and a rear end outer layer stacked in sequence from the inside to the outside, the front end inner layer, the middle end inner layer and the rear end inner layer are all polytetrafluoroethylene film layers, the front end outer layer, the middle end outer layer and the rear end outer layer are all polyamide layers, the front end sandwich is a stainless steel wire woven mesh layer, the middle end sandwich is a nickel-titanium wire woven mesh layer, and the rear end sandwich is a nickel-titanium wire coil layer, so that the softness and bending resistance of the composite tube are continuously enhanced, so that it is suitable for In response to the complex and curved blood vessel environment, the flexibility of the new thrombus aspiration catheter is increased to the maximum extent, the surgical operation is convenient, and the clinical application is expanded. A metal stirring wire and a contraction wire are arranged throughout the main pipeline, a spiral coil is arranged at one end of the metal stirring wire, the other end of the metal stirring wire and one end of the contraction wire both pass through the fixed valve, and the other end of the metal stirring wire is adaptably connected to a handle, the spiral coil includes a spiral metal coil and an elastic metal coil adaptably connected to the spiral metal coil, the spiral metal coil is adaptably connected to the metal stirring wire, and the elastic metal coil is adaptably connected to the contraction wire. The metal stirring wire cooperates with the handle to break up the thrombus, and then the spiral coil is retracted into the double-lumen tube through the contraction wire to prevent the thrombus from being blocked from being aspirated and the blood vessel from being damaged during the aspiration, thereby greatly improving the safety of the thrombus aspiration catheter. Finally, the thrombus is extracted through a syringe, and the operation is repeated until the aspiration is completed. The work efficiency is high and the catheter has a wide range of application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the novel thrombus aspiration catheter of the present invention.

[0021] Figure 2 It is a schematic structural diagram of one end portion of the double-lumen tube of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the composite tube of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the fixed valve of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the spiral coil of the present invention.

[0025] Figure 6It is a cross-sectional layered schematic diagram of the front end composite tube of the present invention.

[0026] Figure 7 It is a cross-sectional layered schematic diagram of the middle end composite pipe of the present invention.

[0027] Figure 8 It is a cross-sectional layered schematic diagram of the rear end composite tube of the present invention.

[0028] In the figure: 1, main pipeline; 2, branch pipeline; 3, three-way pipe; 4, double-lumen tube; 5, expanded tube; 6, composite tube; 7, fixed valve; 8, metal stirring wire; 9, shrink wire; 10, handle; 11, spiral coil; 12, connecting tube; 13, stopcock; 14, syringe; 15, outer tube; 16, inner tube; 17, composite tube at the front end; 17-1, inner layer at the front end; 17-2, interlayer at the front end; 17-3 , outer layer of the front end; 18, composite tube of the middle end; 18-1, inner layer of the middle end; 18-2, interlayer of the middle end; 18-3, outer layer of the middle end; 19, composite tube of the rear end; 19-1, inner layer of the rear end; 19-2, interlayer of the rear end; 19-3, outer layer of the rear end; 20, valve body; 21, spherical valve plug; 22, rotary handle; 23, spiral metal coil; 24, elastic metal coil; 25, metal molybdenum layer. DETAILED DESCRIPTION

[0029] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0030] like Figure 1-8 As shown, a novel thrombus aspiration catheter, the aspiration catheter comprises a main pipeline 1 and a branch pipeline 2 arranged on one side of the main pipeline, the main pipeline 1 and the branch pipeline 2 are connected through a three-way pipe 3, the main pipeline 1 comprises a double-lumen tube 4, a flared tube 5 and a composite tube 6 connected in sequence, the other end of the three-way pipe 3 is also provided with a fixed valve 7, a metal stirring wire 8 and a contraction wire 9 are penetrated in the main pipeline 1, one end of the metal stirring wire 8 is provided with a spiral coil 11, the other end of the metal stirring wire 8 and one end of the contraction wire 9 both pass through the fixed valve 7, and the other end of the metal stirring wire 8 is adaptively connected to a handle 10, one end of the branch pipeline 2 is connected to a connecting pipe 12, one end of the connecting pipe 12 is connected to a stopcock 13, and one end of the stopcock 13 is adaptively connected to a syringe 14;

[0031] The double-lumen tube 4 comprises an outer tube 15 and an inner tube 16 eccentrically arranged in the lumen of the outer tube, the lumen of the outer tube 15 is used to transport thrombus substances, and the lumen of the inner tube 16 is used to install a guide wire;

[0032] The cross-sectional lumen structure of the expanded portion of the expanded tube 5 is the same as that of the double-lumen tube 4. The expanded portion of the expanded tube 5 is adaptably connected to the composite tube 6 and the outer tube 15 of the double-lumen tube, so that the lumen of the outer tube 15 is connected to the composite tube 6. The other end of the expanded tube 5 is set as the inlet end of the guide wire and is connected to the lumen of the inner tube 16.

[0033] The composite tube 6 is a three-section composite structure, including a front end composite tube 17, a middle end composite tube 18 and a rear end composite tube 19 connected in sequence. The front end composite tube 17 includes a front end inner layer 17-1, a front end interlayer 17-2 and a front end outer layer 17-3 stacked in sequence from the inside to the outside. The middle end composite tube 18 includes a middle end inner layer 18-1, a middle end interlayer 18-2 and a middle end outer layer 18-3 stacked in sequence from the inside to the outside. The rear end composite tube 19 includes a rear end inner layer 19-1, a rear end interlayer 19-2 and a rear end outer layer 19-3 stacked in sequence from the inside to the outside.

[0034] The front end inner layer 17-1, the middle end inner layer 18-1, and the rear end inner layer 19-1 are all polytetrafluoroethylene film layers, the front end outer layer 17-3, the middle end outer layer 18-3, and the rear end outer layer 19-3 are all polyamide layers, the front end interlayer 17-2 is a stainless steel wire woven mesh layer, the middle end interlayer 18-2 is a nickel-titanium wire woven mesh layer, and the rear end interlayer 19-2 is a nickel-titanium wire coil layer.

[0035] The fixed valve 7 includes a valve body 20, a spherical valve plug 21 and a rotary handle 22. The spherical valve plug 21 is arranged in the valve body 20, and the rotary handle 22 is arranged on the valve body 20 and is connected with the spherical valve plug 21. The other end of the metal stirring wire 8 and one end of the contraction wire 9 pass through the spherical valve plug 21 and are led outward. The rotary handle 22 is used to adjust the position of the fixed metal stirring wire 8. The spiral coil 11 includes a spiral metal coil 23 and an elastic metal coil 24 connected with the spiral metal coil. The spiral metal coil 23 is connected with the metal stirring wire 8, and the elastic metal coil 24 is connected with the contraction wire 9. One end of the double-lumen tube 4 is set to an oblique cut, and the front outer surface of the double-lumen tube 4 is also provided with a metal molybdenum layer 25, and the thickness of the metal molybdenum layer 25 ranges from 0.05mm. The outer tube 15 is 80 mm long, with an inner diameter of 1.21 mm and an outer diameter of 2.12 mm; the composite tube 6 is 1240 mm long, with an inner diameter of 1.11 mm and an outer diameter of 1.99 mm. The length of the composite tube 17 at the front end is 500 mm, the length of the composite tube 18 at the middle end is 150 mm, and the length of the composite tube 19 at the rear end is 300 mm. The diameter of the metal stirrer 8 is 0.08 mm and the length is 1600 mm. The material of the three-way pipe 3 is high molecular weight polyethylene plastic, and the fixed valve 7 is made of polypropylene plastic. The syringe 14 is a medical syringe with a spiral interface, and the volume of the syringe 14 is 25-50 ml.

[0036] The specific implementation process is:

[0037] Through femoral artery or radial artery puncture, the front end of the main line 1 is inserted into the femoral artery or radial artery to reach the location of the heart disease, and the metal stirring wire 8 is extended from the oblique incision of the double-lumen tube 4, and the metal stirring wire 8 is pumped into the lesion site. The thrombus is broken up by turning the handle 10, and then the contraction wire 9 is pulled out to retract the spiral coil 11. Finally, the thrombus is extracted through the syringe 14, and the operation is repeated until the suction is completed.

[0038] The above contents are examples and explanations of the present invention, but do not mean that the advantages that can be achieved by the present invention are limited thereto. Any simple changes in the structure that may be made during the practice of the present invention, and / or one or more of the advantages achieved in some embodiments are within the scope of protection of this application.

Claims

1. A new type of thrombus aspiration catheter, Features: The suction catheter comprises a main pipeline (1) and a branch pipeline (2) arranged on one side of the main pipeline, the main pipeline (1) and the branch pipeline (2) are connected via a three-way pipe (3), the main pipeline (1) comprises a double-lumen tube (4), a flared tube (5) and a composite tube (6) connected in sequence, the other end of the three-way pipe (3) is further provided with a fixed valve (7), a metal stirring wire (8) and a contraction wire (9) are arranged through the main pipeline (1), one end of the metal stirring wire (8) is provided with a spiral coil (11), the other end of the metal stirring wire (8) and one end of the contraction wire (9) both pass through the fixed valve (7), and the other end of the metal stirring wire (8) is adaptively connected to a handle (10), one end of the branch pipeline (2) is connected to a connecting pipe (12), one end of the connecting pipe (12) is connected to a stopcock (13), one end of the stopcock (13) is adaptively connected to a syringe (14); The double-lumen tube (4) comprises an outer tube (15) and an inner tube (16) eccentrically arranged in the lumen of the outer tube, the lumen of the outer tube (15) being used for conveying thrombus substances, and the lumen of the inner tube (16) being used for installing a guide wire; The cross-sectional lumen structure of the expanded portion of the expanded tube (5) is the same as the cross-sectional lumen structure of the double-lumen tube (4); the expanded portion of the expanded tube (5) is adaptively connected to the composite tube (6) and the outer tube (15) of the double-lumen tube, so that the lumen of the outer tube (15) is connected to the composite tube (6); the other end of the expanded tube (5) is arranged as an inlet end of the guide wire and is connected to the lumen of the inner tube (16); The spiral coil (11) comprises a spiral metal coil (23) and an elastic metal coil (24) adaptably connected to the spiral metal coil, the spiral metal coil (23) is adaptably connected to the metal stirring wire (8), and the elastic metal coil (24) is adaptably connected to the contraction wire (9); The elastic metal coil (24) is connected to the distal end of the spiral metal coil (23), the metal stirring wire (8) is connected to the proximal end of the spiral metal coil (23), the spiral metal coil (23) is a spiral structure with a diameter gradually decreasing from the distal end to the proximal end, and one end of the contraction wire (9) is connected to the elastic metal coil (24).

2. The novel thrombus aspiration catheter according to claim 1, Features: The composite tube (6) is a three-section composite structure, comprising a front end composite tube (17), a middle end composite tube (18) and a rear end composite tube (19) connected in sequence, wherein the front end composite tube (17) comprises, from the inside to the outside, a front end inner layer (17-1), a front end sandwich (17-2) and a front end outer layer (17-3) stacked in sequence, the middle end composite tube (18) comprises, from the inside to the outside, a middle end inner layer (18-1), a middle end sandwich (18-2) and a middle end outer layer (18-3) stacked in sequence, and the rear end composite tube (19) comprises, from the inside to the outside, a rear end inner layer (19-1), a rear end sandwich (19-2) and a rear end outer layer (19-3) stacked in sequence.

3. The novel thrombus aspiration catheter according to claim 2, Features: The inner layer (17-1) of the front end, the inner layer (18-1) of the middle end, and the inner layer (19-1) of the rear end are all polytetrafluoroethylene film layers, the outer layer (17-3) of the front end, the outer layer (18-3) of the middle end, and the outer layer (19-3) of the rear end are all polyamide layers, the front end interlayer (17-2) is a stainless steel wire woven mesh layer, the middle end interlayer (18-2) is a nickel-titanium wire woven mesh layer, and the rear end interlayer (19-2) is a nickel-titanium wire coil layer.

4. The novel thrombus aspiration catheter according to claim 1, Features: The fixed valve (7) comprises a valve body (20), a spherical valve plug (21) and a rotary handle (22); the spherical valve plug (21) is arranged in the valve body (20), and the rotary handle (22) is arranged on the valve body (20) and is adaptively connected to the spherical valve plug (21); the other end of the metal stirring wire (8) and one end of the contraction wire (9) both pass through the spherical valve plug (21) and are led outward; the rotary handle (22) is used to adjust the position of the fixed metal stirring wire (8).

5. The novel thrombus aspiration catheter according to claim 1, Features: One end of the double-lumen tube (4) is provided with an oblique cut, and the front outer surface of the double-lumen tube (4) is also provided with a metal molybdenum layer (25), wherein the thickness of the metal molybdenum layer (25) is in the range of 0.04-0.06 mm.

6. The novel thrombus aspiration catheter according to claim 1, Features: The outer tube (15) has a length of 70-90 mm, an inner diameter of 1.21-1.42 mm, and an outer diameter of 2.12-2.44 mm; the composite tube (6) has a length of 1240-1380 mm, an inner diameter of 1.11-1.33 mm, and an outer diameter of 1.99-2.33 mm.

7. The novel thrombus aspiration catheter according to claim 2, Features: The length of the front end composite tube (17) is in the range of 500-650 mm, the length of the middle end composite tube (18) is in the range of 150-200 mm, and the length of the rear end composite tube (19) is in the range of 300-450 mm.

8. The novel thrombus aspiration catheter according to claim 1, Features: The metal stirring wire (8) has a diameter of 0.08-0.15 mm and a length of 1600-1750 mm.

9. The novel thrombus aspiration catheter according to claim 1, Features: The material of the three-way pipe (3) is high molecular weight polyethylene plastic, and the fixed valve (7) is made of polypropylene plastic.

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