CN117898793A - Thrombus aspiration system - Google Patents

Thrombus aspiration system Download PDF

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Publication number
CN117898793A
CN117898793A CN202410040307.8A CN202410040307A CN117898793A CN 117898793 A CN117898793 A CN 117898793A CN 202410040307 A CN202410040307 A CN 202410040307A CN 117898793 A CN117898793 A CN 117898793A
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Prior art keywords
catheter
distal end
aspiration system
proximal end
thrombus aspiration
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张勇
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Individual
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Priority to CN202410040307.8A priority Critical patent/CN117898793A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/71—Suction drainage systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A61M1/86—Connectors between drainage tube and handpiece, e.g. drainage tubes detachable from handpiece
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/32—General characteristics of the apparatus with radio-opaque indicia

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Surgery (AREA)
  • Vascular Medicine (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention provides a thrombus sucking system, which comprises a first catheter, a second catheter and a handle, wherein the first catheter is arranged at the proximal end of the thrombus sucking system and has a first inner diameter; a second catheter is disposed at the distal end of the thrombus aspiration system, the second catheter having a second inner diameter; the handle is connected with the proximal end of the first catheter, and the distal end of the first catheter is connected with the proximal end of the second catheter; the first inner diameter is greater than the second inner diameter. When the thrombus aspiration system is used for aspirating thrombus in a blood vessel, the thrombus aspiration effect is good.

Description

Thrombus aspiration system
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a thrombus aspiration system.
Background
Cerebral apoplexy is one of the common diseases in the world, and is characterized in that: the Chinese cerebrovascular diseases have high morbidity, high morbidity and high disability rate, and the annual morbidity of the Chinese cerebrovascular diseases is increased year by year. The intravenous injection rt-PA thrombolysis is an effective treatment method of cerebral infarction acute stage proved by evidence-based medicine at present, but the intravenous injection thrombolysis has long treatment time, great damage to ischemic brain tissue and bleeding risk, very similar recanalization rate and the time window of the intravenous injection thrombolysis is only about 4 hours, thus, the cerebral arterial occlusion is far from enough by intravenous injection thrombolysis, and the pure intravenous injection thrombolysis may not be enough to meet the actual clinical requirements.
The suction thrombus is a newer thrombus taking means at present, can reduce the time from femoral artery puncture to reperfusion, shortens the overall operation time, reduces the damage to the vessel wall, and whether the head end of the suction catheter can reach the thrombus position in the vessel is the key of successful suction. At present, aspiration and thrombus removal are becoming a mainstream thrombus removal mode in clinic, but the problem of poor thrombus aspiration effect exists at the same time.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a thrombus aspiration system, which aims to solve the problem of poor aspiration effect existing in the current thrombus aspiration.
In order to achieve the above object, the present invention provides the following technical solutions:
a thrombus aspiration system, the thrombus aspiration system comprising:
a first catheter disposed at a proximal end of the thrombus aspiration system, the first catheter having a first inner diameter;
a second catheter disposed distally of the thrombus aspiration system, the second catheter having a second inner diameter;
A handle connected to a proximal end of the first catheter, a distal end of the first catheter being connected to a proximal end of the second catheter;
The first inner diameter is greater than the second inner diameter.
In an alternative embodiment of the present invention, a clamping structure is disposed at a distal end of the first catheter, and the second catheter is detachably connected to the first catheter at the clamping structure.
In an alternative embodiment of the present invention, the second inner diameter is of a uniform value, the uniform value being between 0.5mm and 2mm.
In an alternative embodiment of the invention, the proximal end of the second catheter is connected to a guide wire, which can pull the second catheter to move along the extending direction of the blood vessel.
In an alternative embodiment of the present invention, the second catheter has a three-layer structure, and a first developing ring is disposed at the distal end of the second catheter; and/or the number of the groups of groups,
The first catheter is of a three-layer structure, and a second developing ring is arranged at the distal end of the first catheter.
In an alternative embodiment of the present invention, the thrombus aspiration system further includes an adjustable bending mechanism disposed on the handle and connected to the distal end of the second catheter for bending the distal end of the second catheter.
In an alternative embodiment of the present invention, the bending adjustment mechanism includes a bending adjustment control valve and a bending adjustment control line, the bending adjustment control valve is rotatably disposed on the handle, a proximal end of the bending adjustment control line is connected to the bending adjustment control valve, and a distal end of the bending adjustment control line is connected to a distal end of the second catheter;
rotating the bend adjustment control valve may pull the distal end of the second catheter through the bend adjustment control wire to bend.
In an alternative embodiment of the present invention, the proximal end of the second catheter forms a reducing section, and the thrombus aspiration system further includes a variable diameter mechanism disposed on the handle and connected to the reducing section for expanding an inner diameter of the reducing section.
In an alternative embodiment of the present invention, the variable diameter mechanism includes a variable diameter control valve and a variable diameter control wire, the variable diameter control valve is rotatably disposed on the handle, a proximal end of the variable diameter control wire is connected to the variable diameter control valve, and a distal end of the variable diameter control wire is connected to the variable diameter section;
Rotating the reducing control valve can pull the reducing section through the reducing control wire, so that the inner diameter of the reducing section is enlarged.
In an alternative embodiment of the present invention, the suction system further includes a third catheter, where the third catheter includes a connection pipe, a negative pressure control switch, and a negative pressure source connection pipe, a proximal end of the connection pipe is connected to a proximal end of the first catheter, two ends of the negative pressure control switch are respectively connected to a distal end of the connection pipe and a proximal end of the negative pressure source connection pipe, the negative pressure source connection pipe is used to connect to an external negative pressure source, and the negative pressure control switch is used to control or block circulation of the negative pressure source.
The beneficial effects are that:
The thrombus aspiration system of the present invention comprises a first catheter, a second catheter and a handle, the first catheter being disposed at a proximal end of the thrombus aspiration system, the first catheter having a first inner diameter; a second catheter is disposed at the distal end of the thrombus aspiration system, the second catheter having a second inner diameter; the handle is connected with the proximal end of the first catheter, and the distal end of the first catheter is connected with the proximal end of the second catheter; the first inner diameter is greater than the second inner diameter. When the thrombus aspiration system is used for aspirating thrombus in a blood vessel, the thrombus aspiration effect is good.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. Wherein:
FIG. 1 is a schematic diagram of a pumping system according to some embodiments of the present invention;
FIG. 2 is a schematic view of a part of the suction system in a bending state according to the present invention;
FIG. 3 is a cross-sectional view of a hollow push rod of the aspiration system of the present invention;
FIG. 4 is a schematic illustration of a suction system of the present invention with a proximal variable diameter section of a second catheter tube unexpanded;
FIG. 5 is a schematic view of the aspiration system of the present invention with the proximal end of the second catheter enlarged in diameter section;
FIG. 6 is a schematic view of the suction system of the present invention after the proximal variable diameter section of the second catheter has been enlarged and mated with the first catheter;
FIG. 7 is a proximal cross-sectional view of a second catheter in the aspiration system of the present invention;
fig. 8 is a schematic view of a part of a pumping system according to other embodiments of the present invention.
The figures indicate: 1-a first conduit; 11-a second developing ring; 12-a three-way valve; 21-a handle; 211-a first luer fitting; 22-a hollow push rod; 23-a second conduit; 231-inner layer; 232-an intermediate layer; 233-an outer layer; 234-pass; 241-a bend control valve; 242-bending control line; 251-reducing control valve; 252-reducing control line; 26-reducing section; 261-oblique incision; 27-a first developing ring; 3-a third conduit; 31-connecting pipes; 311-a second luer fitting; 32-a negative pressure control switch; 33-negative pressure source communicating tube.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
The present invention will be described in detail with reference to examples. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
Aiming at the problem of poor suction effect of the current thrombus suction, the invention provides a thrombus suction system, which aims at improving the suction effect of thrombus.
As shown in fig. 1 and 2, the thrombus-aspiration system of the present invention comprises a first catheter 1, a second catheter 23 and a handle 21, the first catheter 1 being disposed at a proximal end of the thrombus-aspiration system, the first catheter 1 having a first inner diameter; a second catheter 23 is disposed at the distal end of the thrombus aspiration system, the second catheter 23 having a second inner diameter; the handle 21 is connected to the proximal end of the first catheter 1, and the distal end of the first catheter 1 is connected to the proximal end of the second catheter 23; the first inner diameter is greater than the second inner diameter.
Specifically, the first catheter 1 has a hollow circular tube structure, and the proximal end of the first catheter is connected with the distal end of the handle 21; the second conduit 23 is of hollow circular tube construction and has an outer diameter smaller than the inner diameter of the first conduit 1. The connection between the proximal end of the first catheter 1 and the handle 21, and the connection between the distal end of the first catheter 1 and the proximal end of the second catheter 23 are all detachable, and the specific connection manner is not limited, and is within the scope of the present invention.
In an embodiment of the present invention, a clamping structure (not shown) is disposed at the distal end of the first catheter 1, and the second catheter 23 is detachably connected to the first catheter 1 at the clamping structure. The distal end of the first catheter 1 and the proximal end of the second catheter 23 are both fixedly clamped with the clamping structure, and the specific structure of the clamping structure is not limited as long as the detachable connection of the first catheter 1 and the second catheter 23 can be realized.
Optionally, the clamping structure has a connection channel for connecting the second conduit 23, and an elastic sheet is disposed at an inner peripheral wall of the connection channel at intervals, and when the proximal end of the second conduit 23 is inserted into the connection channel, the elastic sheet elastically abuts against the second conduit 23, so as to achieve good connection firmness of the second conduit 23. It should be noted that, the size of the connecting channel is larger than the outer diameter of the second catheter 23, and the above structure is provided, and the clamping structure can be adapted to connect with the second catheters 23 with different sizes, that is, the second catheters 23 have multiple sizes, so that the aspiration operation of thrombus in blood vessels with different sizes can be performed. Optionally, the second inner diameter is of a uniform value ranging from 0.5mm to 2mm (e.g., 0.5mm, 1mm, 1.5mm, 2mm, and ranges between any two end points).
In an embodiment of the present invention, the proximal end of the second catheter 23 is connected to a guide wire (not shown) which can pull the second catheter 23 along the extending direction of the blood vessel. The guide wire serves to guide the second catheter 23, optionally with the proximal end of the guide wire passing through the handle 21 and exposed to the handle 21.
As shown in fig. 1 and 2, in some embodiments of the present invention, the thrombus aspiration system further includes an adjustable bending mechanism disposed on the handle 21 and connected to the distal end of the second catheter 23 for bending the distal end of the second catheter 23.
As shown in fig. 1 to 3, in the embodiment of the present invention, the bending adjustment mechanism includes a bending adjustment control valve 241 and a bending adjustment control wire 242, the bending adjustment control valve 241 is rotatably disposed on the handle 21, a proximal end of the bending adjustment control wire 242 is connected to the bending adjustment control valve 241, and a distal end of the bending adjustment control wire 242 is connected to a distal end of the second catheter 23; manual rotation of the bend adjustment control valve 241 may pull the distal bend of the second catheter 2 through the bend adjustment control line 242. The adjustable bending mechanism is simple to set, and can effectively improve the capability of the distal end of the suction catheter 2 for passing through tortuous vessels, thereby being beneficial to the in-place of the suction catheter 2. It should be noted that, the bending control wire 242 is a metal wire, so that the firmness is better, and the stability of bending operation is effectively ensured.
In the embodiment of the present invention shown in fig. 7, the second catheter 2 includes an inner layer 231, an intermediate layer 232 and an outer layer 233, and the outer layer 233 is provided with a channel 234 through which a bending control wire 242 passes; the outer side of the distal end of the middle layer 232 is sleeved with a loop (not shown), the loop is wrapped by the outer layer 233, the loop is at least partially positioned in the channel 234, and the distal end of the bending control line 242 is connected to the loop; the thrombus-aspiration system further comprises a hollow push rod 22, wherein the hollow push rod 22 is accommodated in the first catheter 1, the proximal end of the hollow push rod 22 is connected to the handle 21, the distal end of the hollow push rod 22 is connected to the intermediate layer 232, and a bending control wire 242 is accommodated in and penetrates the hollow push rod 22.
Specifically, the inner layer 231 is made of Polytetrafluoroethylene (PTFE), the middle layer 232 is a metal reinforcing layer, the outer layer 233 is made of polymer, the channel 234 extends along the length direction of the second catheter 23 and is located in the outer layer 233, and the inner diameter of the channel 234 is slightly larger than the outer diameter of the bending control wire 242, so as to ensure that the bending control wire 242 is movably located in the channel 234. The loop is a metal loop, which is located outside the middle layer 232 and is surrounded by the outer layer 233, and the loop is at least partially located in the channel 234, and the distal end of the bending control wire 242 is welded and fixed to the metal loop. The hollow push rod 22 is made of metal, and has a hollow round rod structure, and the distal end of the hollow push rod 22 is welded and fixed with the middle layer 232, and it should be noted that the inner diameter of the hollow push rod 22 is larger than the thickness of the middle layer 232, so that the distal end of the hollow push rod 22 is not completely sealed after being fixed with the middle layer 232, and the bending control wire 242 can extend from the unsealed position of the distal end of the hollow push rod 22 and enter the channel 234.
As shown in fig. 1 to 5, in some embodiments of the present invention, the proximal end of the second catheter 23 forms a variable diameter section 26, and the thrombus aspiration system further includes a variable diameter mechanism provided on the handle 21 and connected to the variable diameter section 26 for expanding the inner diameter of the variable diameter section 26. The variable diameter section 26 has a contracted state in which the inner diameter of the variable diameter section 26 is the same as the inner diameter of the second conduit 23 and an expanded state in which the inner diameter of the variable diameter section 26 is greater than the inner diameter of the second conduit 23.
In the embodiment of the invention, the variable diameter mechanism comprises a variable diameter control valve 251 and a variable diameter control wire 252, wherein the variable diameter control valve 251 is rotatably arranged on the handle 21, the variable diameter control wire 252 is accommodated in and penetrates through the hollow push rod 22, the proximal end of the variable diameter control wire 252 is connected with the variable diameter control valve 251, and the distal end of the variable diameter control wire 252 is connected with the variable diameter section 26; manual rotation of the reducing control valve 251 may pull the reducing segment 26 through the reducing control wire 252 such that the inner diameter of the reducing segment 26 expands. The variable diameter mechanism is simple to set, negative pressure transmission loss can be effectively reduced, and the distal end suction pressure is improved.
The diameter-variable control wire 252 is a metal wire, and pulling the diameter-variable control wire 252 may change the diameter-variable section 26 from the contracted state to the expanded state, wherein the diameter-variable section 26 has an inner diameter larger than the inner diameter of the second conduit 23 in the expanded state, and gradually increases in a direction away from the second conduit 23, and the diameter-variable section 26 has a substantially tapered shape in the expanded state.
In the embodiment of the present invention, the material of the reducing section 26 is a compliant elastic polymer, the inner diameter of the reducing section 26 is enlarged under the pulling of the reducing control wire 252, the proximal end of the reducing section 26 is an inclined notch 261 supported by nickel titanium wire, and the distal end of the reducing control wire 252 is connected to the inclined notch 261.
Specifically, the compliant polymer includes, but is not limited to, thermoplastic polyurethane elastomer rubber (TPU), polyethylene Octene Elastomer (POE), silicone, and the like. The proximal oblique incision 261 of the reducing section 26 is supported by nickel titanium wires after heat treatment shaping, the initial shaping diameter of the nickel titanium wires is larger, the inner diameter of the reducing section 26 is the same as the inner diameter of the second catheter 23 in a contracted state, the oblique incision 261 can be expanded by pulling the reducing control wire 252, and the reducing section 26 is changed from the contracted state to an expanded state, wherein the inner diameter of the reducing section 26 is larger than the inner diameter of the second catheter 23 in the state.
The distal end of the hollow push rod 22 passes through the inner side of the variable diameter section 26 and is welded to the metal reinforcing layer (i.e., the middle layer 232) of the second catheter 23, a through hole (not shown) through which the variable diameter control wire 252 passes is formed in the distal end side wall of the hollow push rod 22, and the variable diameter control wire 252 extends out of the hollow push rod 22 from the through hole and is supported and welded with the nickel-titanium wire of the oblique incision 261.
In the embodiment of the present invention, as shown in fig. 6, the variable diameter section 26 is enlarged to be closely attached to the inner wall of the first catheter 1 by the pulling of the variable diameter control wire 252. By the design, the function of increasing the suction cavity can be realized, and meanwhile, the overall stability and reliability of the suction system can be improved.
It can be understood that the thrombus aspiration system of the above embodiment of the present invention can achieve the functions of enlarging the aspiration lumen and adjusting the bend, and the hollow push rod 22 can effectively reduce the space occupied by the second catheter 23 when being matched with the first catheter 1, thereby reducing the negative pressure transmission loss and improving the distal aspiration pressure; simultaneously, the ability of the distal end of the second catheter 23 to pass through tortuous vessels is effectively improved, the second catheter 23 is in place, and the aspiration ability of different thrombi can be enhanced by bending the distal end of the second catheter 23 during thrombi aspiration.
In the embodiment in which the hollow pushing rod 22 is provided, the positions of the hollow pushing rod 22 and the guide wire are not limited, and of course, the hollow pushing rod 22 may also serve to pull the second catheter 23 to move along the extending direction of the blood vessel, so that the guide wire may be omitted for simplifying the structure.
As shown in fig. 1 and 2, the distal end of the second catheter 23 is provided with a first developing ring 27; the arrangement of the first developing ring 27 facilitates accurate positioning during operation and improves operation accuracy.
It should be noted that, the first developing ring 27 and the metal ring sleeve are both located at the distal end of the second catheter 23, and the first developing ring 27 is located at the distal end of the metal ring sleeve, and optionally, the distance between the metal ring sleeve and the first developing ring 27 is 1-5mm (for example, 1mm, 2mm, 3mm, 4mm, 5mm, and the interval value between any two end values).
In the specific embodiment of the invention, the first catheter 1 is of a three-layer structure, specifically, an outer polymer material, an intermediate metal reinforcing layer and an inner PTFE material, the second developing ring 11 is arranged at the distal end of the first catheter 1, and the second developing ring 11 is arranged, so that the accurate positioning in the operation process is facilitated, and the operation accuracy is improved.
As shown in fig. 1 and 2, in the embodiment of the present invention, a first luer connector 211 is disposed at the proximal end of the handle 21, a three-way valve 12 is disposed at the proximal end of the first catheter 1, and the first luer connector 211 is connected to one interface of the three-way valve 12. The first catheter 1 is connected with the handle 21 through the first luer connector 211 and the three-way valve 12, so that the operation is simple, and the connection tightness is good. The first luer fitting 211 is an inner conical fitting, and the inner conical fitting is in sealing connection with the three-way valve 12.
As shown in fig. 1, in some embodiments of the present invention, the thrombus aspiration system further includes a third catheter 3, the third catheter 3 includes a connection tube 31, a negative pressure control switch 32, and a negative pressure source connection tube 33, one end of the connection tube 31 is provided with a second luer connector 311, the second luer connector 311 is connected to another interface of the three-way valve 12, two ends of the negative pressure control switch 32 are respectively connected to the other end of the connection tube 31 and one end of the negative pressure source connection tube 33, the negative pressure source connection tube 33 is used for connecting an external negative pressure source, and the negative pressure control switch 32 is used for controlling or blocking the circulation of the negative pressure source. The third conduit 3 communicates with the first conduit 1 through the second luer connector 311 and the three-way valve 12, and the circulation of the negative pressure source is controlled through the negative pressure control switch 32 so as to realize the negative pressure suction operation of the suction system.
As shown in fig. 8, in some embodiments of the present invention, two handles 21 are connected in series, two hollow pushing rods 22 and two second catheters 23 are respectively sleeved on each other, the distal end of the handle 21 close to the first catheter 1 is connected to the first catheter 1 and the outer hollow pushing rod 22, the distal end of the handle 21 far from the first catheter 1 is connected to the other handle 21 and the inner hollow pushing rod 22, and the distal end of the inner second catheter 23 is exposed to the outer second catheter 23.
Specifically, the two handles 21 are connected in series through the first luer connector 211, the two handles 21 are provided with a bending control valve 241 and a reducing control valve 251, the two hollow pushing rods 22 and the two second conduits 23 are respectively sleeved with each other, and each hollow pushing rod 22 is internally provided with a bending control line 242 and a reducing control line 252, and the specific setting mode is the same as that of the above embodiment. The large inner diameter hollow push rod 22 (i.e., the outer hollow push rod 22) is connected to the first luer fitting 211 near the handle 21 (i.e., the distal end side handle 21) of the first catheter 1, and the small inner diameter hollow push rod 22 (i.e., the inner hollow push rod 22) is connected to the first luer fitting 211 far from the handle 21 (i.e., the proximal end side handle 21) of the first catheter 1. That is, the two suction catheters 2 are arranged, the two suction catheters 2 have different specifications, and the design can be used for the thrombus taking and suction operation in blood vessels with different sizes, namely, the thrombus taking and suction catheter is convenient for clinical suction of blood vessels with various specifications.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A thrombus aspiration system, comprising:
a first catheter disposed at a proximal end of the thrombus aspiration system, the first catheter having a first inner diameter;
a second catheter disposed distally of the thrombus aspiration system, the second catheter having a second inner diameter;
A handle connected to a proximal end of the first catheter, a distal end of the first catheter being connected to a proximal end of the second catheter;
The first inner diameter is greater than the second inner diameter.
2. The thrombus aspiration system of claim 1 wherein the distal end of the first catheter is provided with a snap-fit feature, and the second catheter is detachably connected to the first catheter at the snap-fit feature.
3. The thrombus aspiration system of claim 2, wherein the second inner diameter is of a uniform value, the uniform value being between 0.5mm and 2 mm.
4. The thrombus aspiration system of claim 2 wherein the proximal end of the second catheter is connected to a guidewire, the guidewire being configured to pull the second catheter in the direction of extension of the blood vessel.
5. The thrombus aspiration system of claim 1 wherein the second catheter is of a three-layer construction, the distal end of the second catheter being provided with a first visualization ring; and/or the number of the groups of groups,
The first catheter is of a three-layer structure, and a second developing ring is arranged at the distal end of the first catheter.
6. The thrombus aspiration system of claim 1, further comprising an adjustable bending mechanism disposed on the handle and connected to the distal end of the second catheter for bending the distal end of the second catheter.
7. The thrombus aspiration system of claim 6 wherein the adjustable bend mechanism comprises a bend control valve rotatably disposed on the handle, a proximal end of the bend control line connected to the bend control valve, and a distal end of the bend control line connected to a distal end of the second catheter;
rotating the bend adjustment control valve may pull the distal end of the second catheter through the bend adjustment control wire to bend.
8. The thrombus aspiration system of claim 1, wherein the proximal end of the second catheter forms a variable diameter section, the thrombus aspiration system further comprising a variable diameter mechanism disposed on the handle and connected to the variable diameter section for expanding the inner diameter of the variable diameter section.
9. The thrombus aspiration system of claim 8 wherein the variable diameter mechanism comprises a variable diameter control valve rotatably disposed on the handle, a proximal end of the variable diameter control wire connected to the variable diameter control valve, and a distal end of the variable diameter control wire connected to the variable diameter section;
Rotating the reducing control valve can pull the reducing section through the reducing control wire, so that the inner diameter of the reducing section is enlarged.
10. The thrombus aspiration system according to any one of claims 1-9, further comprising a third catheter, said third catheter comprising a connection tube, a negative pressure control switch, a negative pressure source connection tube, a proximal end of said connection tube being connected to a proximal end of said first catheter, both ends of said negative pressure control switch being connected to a distal end of said connection tube and to a proximal end of said negative pressure source connection tube, respectively, said negative pressure source connection tube being for communicating with an external negative pressure source, said negative pressure control switch being for controlling or blocking the flow of the negative pressure source.
CN202410040307.8A 2024-01-11 2024-01-11 Thrombus aspiration system Withdrawn CN117898793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410040307.8A CN117898793A (en) 2024-01-11 2024-01-11 Thrombus aspiration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410040307.8A CN117898793A (en) 2024-01-11 2024-01-11 Thrombus aspiration system

Publications (1)

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CN117898793A true CN117898793A (en) 2024-04-19

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CN202410040307.8A Withdrawn CN117898793A (en) 2024-01-11 2024-01-11 Thrombus aspiration system

Country Status (1)

Country Link
CN (1) CN117898793A (en)

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