CN114948085A - Perfusion catheter and application thereof - Google Patents

Perfusion catheter and application thereof Download PDF

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Publication number
CN114948085A
CN114948085A CN202210626348.6A CN202210626348A CN114948085A CN 114948085 A CN114948085 A CN 114948085A CN 202210626348 A CN202210626348 A CN 202210626348A CN 114948085 A CN114948085 A CN 114948085A
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Prior art keywords
catheter
guide wire
seat
wire
tube
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CN202210626348.6A
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Chinese (zh)
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王思维
苗铮华
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Shanghai Changde Medical Technology Co ltd
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Shanghai Changde Medical Technology Co ltd
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Priority to CN202210626348.6A priority Critical patent/CN114948085A/en
Publication of CN114948085A publication Critical patent/CN114948085A/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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • 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
    • 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
    • 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
    • A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • 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
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • 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
    • A61B2017/22038—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 a guide wire
    • 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
    • A61B2017/22082—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 after introduction of a substance
    • A61B2017/22084—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 after introduction of a substance stone- or thrombus-dissolving
    • 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)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Vascular Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention provides a perfusion catheter and application thereof, wherein the perfusion catheter comprises a catheter component and a guide wire component inserted into the catheter component, the catheter component comprises a catheter seat, a stress diffusion tube and a liquid spray tube which are sequentially connected, at least four developing rings are arranged on the liquid spray tube, a side hole is arranged on the liquid spray tube between every two adjacent developing rings, the sectional area of the side hole is gradually increased along the direction far away from the stress diffusion tube, the guide wire component comprises a plug guide wire and a guide wire seat, the catheter seat is connected with the guide wire seat, and the plug guide wire penetrates into the catheter component. In the invention, the perfusion catheter adopts the step-type side hole design, so that the medicine output of each hole is more even, the developing structure is perfected, the head end can be developed, the developing points are added to the side hole section, the sizes of the side holes between two adjacent developing points are different, an operator can be clearly guided to perform an operation, and the overall operation efficiency and safety are improved.

Description

Perfusion catheter and application thereof
Technical Field
The invention belongs to the technical field of medical thrombolytic surgery, and relates to a perfusion catheter and application thereof.
Background
Thrombus is a small block formed on the surface of a blood stream at a denuded place or a repaired place in a blood vessel of a cardiovascular system, in a variable fluid dependence type, the thrombus is composed of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells, the thrombus formation is a multi-factor change process which is interacted and mutually influenced by a group of genetic and environmental factors, clinically common thrombus patients are mainly characterized by familial inheritance, recurrent attacks, symptom severity, abnormality of a thrombus formation part and younger attack time, and the quantity of hospital catheter thrombolysis operations is also increased year by year.
CN215821074U discloses a thrombolytic catheter device for intravenous therapy of thrombus, comprising a thrombolytic catheter device body, a manual catheter control mechanism, a catheter intrusion mechanism, a thrombolytic catheter recovery mechanism, a thrombolytic catheter pumping mechanism, a thrombolytic catheter pressure stabilizing mechanism, and a thrombolytic catheter electrical connection terminal, wherein one end of the thrombolytic catheter device body is provided with the thrombolytic catheter electrical connection terminal, the other end of the thrombolytic catheter device body is provided with the catheter intrusion mechanism, the other end of the catheter intrusion mechanism is connected with the thrombolytic catheter pressure stabilizing mechanism, the bottom end of the side surface of the thrombolytic catheter pressure stabilizing mechanism is provided with the thrombolytic catheter pumping mechanism, the bottom end of the thrombolytic catheter pumping mechanism is provided with the thrombolytic catheter recovery mechanism, the middle part of the thrombolytic catheter device body is provided with the manual catheter control mechanism, the device simple structure, performance safe and reliable, user can use this device to carry out the thrombolysis treatment to patient's vein thrombus, can prevent effectively that air and other foreign matter from getting into patient's health.
CN209075815U discloses a thrombolysis catheter device for treating thrombus through internal jugular vein, which comprises a thrombolysis catheter and a thrombolysis catheter fixed connection part; the thrombolysis catheter fixed connection part comprises: the device comprises a fixed conduit, a one-way clamping sleeve, a one-way clamping joint, a conveying pipe and a one-way valve joint. When the device is used, the thrombolysis catheter is inserted into a body from a neck blood vessel of a patient and conveyed to a thrombus, the redundant part of the catheter, which is retained outside the body, of the thrombolysis catheter is cut off and discarded, the thrombolysis catheter is inserted into the one-way clamping connector, and the one-way clamping sleeve clamps the outer wall of the thrombolysis catheter at the moment. At the moment, the conveying pipe at the rear end of the fixed catheter climbs spirally and cannot lie prone on the skin of a patient. Then the external thrombolytic agent injection tube is screwed and connected at the joint of the one-way valve at the upper end of the spiral climbing of the delivery tube. The thrombolytic agent is injected into the one-way valve joint from the thrombolytic agent injection tube, and seeps out from the thrombolytic hole to perform thrombolysis on external thrombus. And then the injection tube of the thrombolytic agent is pulled out, thus being simple, convenient and practical.
CN215960137U discloses a thrombolytic catheter device, comprising an occlusion guide wire and a catheter assembly, the catheter assembly comprising a thrombolytic catheter having a guide wire channel, a thrombolytic component disposed outside a distal end portion of the thrombolytic catheter and having a radially contracted state and a radially expanded state, and an adjustment mechanism disposed at a proximal end portion of the thrombolytic catheter, the adjustment mechanism being capable of switching the thrombolytic component between the radially contracted state and the radially expanded state. Upon transition of the bolt breaking member from a radially contracted state to a radially expanded state; and/or, the morselized component in the radially expanded state cuts the intravascular lesion as the morselized component moves in the direction of its axis. The utility model discloses a dissolve bolt pipe device has garrulous bolt and the function of dissolving the bolt concurrently, can be at the in-process of dissolving the bolt, carries out the breakage to the bolt at any time, and breakage and dissolve bolt mutually noninterfere, convenient operation have improved the effect of dissolving the bolt, shorten the time of dissolving the bolt treatment, reduce the dose of dissolving the bolt medicine.
The existing perfusion catheter instrument is complex in use method, high in overall price, unreasonable in side hole design and incomplete in whole section developing performance, so that the practicability is not ideal enough. Therefore, there is a need to design and develop an irrigation catheter that can meet the needs of practical production and living while overcoming the drawbacks of the prior art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a perfusion catheter and application thereof, wherein the side hole design of the perfusion catheter is more reasonable, the stepped side hole design is adopted, so that the medicine output of each hole is more even, the developing structure is improved, the head end can be developed, the developing points are added to the side hole section, the sizes of the side holes between two adjacent developing points are different, an operator can be clearly guided to perform an operation, and the overall operation efficiency and safety are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides an infusion catheter, including a catheter assembly and a guide wire assembly inserted into the catheter assembly, where the catheter assembly includes a catheter seat, a stress diffusion tube and a liquid spray tube connected in sequence, the liquid spray tube is provided with at least four developing rings, a side hole is provided on the liquid spray tube between adjacent developing rings, and a cross-sectional area of the side hole gradually increases along a direction away from the stress diffusion tube, the guide wire assembly includes a plug guide wire and a guide wire seat, the catheter seat is connected to the guide wire seat, and the plug guide wire is inserted into the catheter assembly in a penetrating manner.
In the invention, the side hole design of the perfusion catheter is more reasonable, the stepped side hole design is adopted, so that the medicine output of each hole is more average, the developing structure is perfected, the head end can be developed, the developing points are added to the side hole section, the sizes of the side holes between two adjacent developing points are different, an operator can be clearly guided to perform an operation, and the integral operation efficiency and safety are improved.
As a preferable technical scheme of the invention, the conduit seat is connected with the stress diffusion tube in a hot melting, pre-embedded injection molding or gluing mode.
It should be noted that the present invention does not specifically require and limit the structural features such as the size, shape, and material of the catheter hub, and the catheter hub serves as a catheter penetration platform, which is an essential component of the catheter system, so it is understood that other catheter hubs capable of performing such functions may be used in the present invention, and those skilled in the art may adaptively adjust the size, shape, and material of the catheter hub according to the usage scenario and test conditions.
As a preferred technical solution of the present invention, the spray tube is connected to the stress diffusion tube by hot melting or gluing.
It should be noted that the present invention does not specifically require and limit the structural features of the liquid spraying tube, such as size, shape, and material, and the liquid spraying tube functions as an essential part of the catheter system in the present invention, so it is understood that other liquid spraying tubes capable of performing such functions can be used in the present invention, and those skilled in the art can adapt the size, shape, and material of the liquid spraying tube according to the use scenario and test conditions.
As a preferable technical scheme, a reducing structure is arranged at one end, far away from the stress diffusion tube, of the liquid spraying tube, and the reducing structure is used for clamping the guide wire assembly.
The reducing structure and the plug are arranged in a matched mode and used for preventing medical liquid from flowing out of the distal end opening of the liquid spraying tube, the reducing structure is made of developing materials, and an operator can clearly observe specific conditions by contacting with equipment such as radiography and ultrasound.
As a preferable technical scheme, the plug guide wire comprises a supporting spring, a core wire, a plug and a winding wire which are sequentially connected, and the core wire is inserted into the guide wire seat after being bent.
As a preferable technical solution of the present invention, a shielding structure is disposed in the guide wire holder, an inner diameter of the shielding structure is smaller than an outer diameter of the support spring, and the inner diameter of the shielding structure is smaller than an outer diameter of the core wire after the core wire is bent.
It should be noted that, in the present invention, the inner diameter of the shielding structure is smaller than the outer diameter of the supporting spring and smaller than the outer diameter of the bent core wire, so that the guide wire seat is shielded by the supporting spring or the bent portion of the core wire no matter which direction the guide wire moves along the plug, and the guide wire seat cannot be separated from the plug guide wire.
As a preferred technical scheme of the present invention, the outer diameter of the plug is larger than the outer diameter of the winding wire, the outer diameter of the plug is larger than the outer diameter of the core wire, and the plug and the reducing structure are arranged in a matching manner.
As a preferred embodiment of the present invention, at least one side hole is provided between adjacent developing rings, and the side hole is a square side hole or a circular side hole.
Preferably, the side holes are arranged in a staggered manner.
It should be noted that the side holes are limited to be arranged in a staggered manner in the invention, because the arrangement mode can effectively increase the contact area between the thrombolytic drug and the thrombus, and is convenient for an operator to perform an operation.
Preferably, the hole diameters of the side holes are different between adjacent developing rings.
It should be noted that the difference of the pore diameters of the side holes between the adjacent developing rings is limited in the invention, because the side holes with different pore diameters are matched with each other along with the expansion of the interval range between the developing rings, so that the stepped administration with different injection doses can be realized, and more clinical requirements can be met.
Illustratively, if the liquid spraying pipe is provided with four developing rings, namely a first developing ring, a second developing ring, a third developing ring and a fourth developing ring, wherein the aperture of a single side hole between the first developing ring and the second developing ring is smaller than the aperture of a single measurement and control between the second developing ring and the third developing ring, and so on, the aperture of a single measurement and control between the second developing ring and the third developing ring is smaller than the aperture of a single measurement and control between the third developing ring and the fourth developing ring, and the injection pressures of different side holes are inconsistent due to inconsistent distances between the side holes and the catheter base, the design of the invention can offset the difference.
In a preferred embodiment of the present invention, the distances between adjacent developing rings are the same or different.
Illustratively, the method of use of the perfusion catheter in the present invention is:
the catheter assembly is inserted into a human body along a guide wire which is inserted into the human body in advance, and the position of the catheter assembly can be clearly seen under the assistance of DSA equipment as the reducing structure of the liquid spraying pipe of the catheter assembly is made of developing materials. The penetration is stopped when the catheter assembly reaches the desired location (i.e., the location where thrombolysis is desired). And taking out the guide wire and replacing the guide wire with the guide wire component. And the wire winding end of the plug guide wire of the guide wire assembly is penetrated into a catheter seat of the catheter assembly, so that the guide wire assembly is penetrated into a human body along the inner cavity of the liquid spraying pipe of the catheter assembly. When the plug of the plug guide wire of the guide wire component contacts with the reducing structure of the liquid spray pipe of the catheter component, the penetration is stopped, and the catheter seat of the catheter component is screwed with the guide wire seat of the guide wire component. A syringe of appropriate size is used to withdraw a sufficient amount of thrombolytic drug, and the syringe is screwed to the guidewire seat of the guidewire assembly. The injector is pushed to inject the thrombolytic drug into the inner cavity of the liquid spray tube of the catheter component. Because the end cap of the end cap guide wire of the guide wire component plugs the port of the liquid spray pipe of the catheter component, the thrombolytic drug can only flow out from the side hole of the liquid spray pipe of the catheter component, thereby achieving the purpose of accurate thrombolysis.
In a second aspect, the present invention provides the use of an infusion catheter of the first aspect in the field of medical thrombolytic surgery.
The invention can also be used for high-pressure injection, when the catheter seat of the catheter is screwed with the guide wire seat of the guide wire assembly, the guide wire seat of the guide wire assembly is connected with a high-pressure injection gun, and the high-pressure injection gun directly injects thrombolytic drugs or contrast agents into the inner cavity of the liquid spray tube of the catheter assembly; and the present invention may also be used without a guidewire assembly. After the catheter assembly is inserted into a human body, the catheter seat of the catheter assembly is connected with a high-pressure injection gun, and the high-pressure injection gun directly injects thrombolytic drugs or contrast agents into the inner cavity of the liquid spraying tube of the catheter assembly.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the side hole design of the perfusion catheter is more reasonable, the stepped side hole design is adopted, so that the medicine output of each hole is more average, the developing structure is perfected, the head end can be developed, the developing points are added to the side hole section, the sizes of the side holes between two adjacent developing points are different, an operator can be clearly guided to perform an operation, and the integral operation efficiency and safety are improved.
Drawings
FIG. 1 is a schematic diagram of an irrigation catheter according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a catheter assembly in an infusion catheter in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural view of a guidewire assembly in an infusion catheter, according to an embodiment of the present invention;
FIG. 4 is a schematic view of a configuration of a guidewire in an infusion catheter in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a side hole and a variable diameter structure in an irrigation catheter according to an embodiment of the present invention;
FIG. 6 is a schematic view of the guide wire holder and guide wire mounting in an infusion catheter according to one embodiment of the present invention;
FIG. 7 is a schematic view of the installation of a guide wire plug and a reducer in an irrigation catheter according to an embodiment of the present invention;
FIG. 8 is a schematic view of the side hole arrangement in an infusion catheter, according to an embodiment of the present invention;
FIG. 9 is a schematic view of side holes on both sides of adjacent developer rings in an irrigation catheter according to an embodiment of the present invention;
wherein: 1-a catheter assembly; 11 a catheter hub; 12-a stress diffusion tube; 13-a liquid spray pipe; 14-a first developer ring; 15-a second developer ring; 16-a third developer ring; 17-a fourth developer ring; 131-side holes; 132-a variable diameter structure;
2-a guide wire assembly; 21 a dead-end guide wire; 22-a wire guide seat; 211-support springs; 212-core wire; 213-plug; 214-filament winding; 221-occlusion structure.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the present invention provides an infusion catheter, as shown in fig. 1 to 9, the infusion catheter includes a catheter assembly 1 and a guide wire assembly 2 inserted into the catheter assembly 1, the catheter assembly 1 includes a catheter base 11, a stress diffusion tube 12 and a liquid spray tube 13 connected in sequence, the liquid spray tube 13 is provided with at least four development rings, the liquid spray tube 13 between adjacent development rings is provided with a side hole 131, a cross-sectional area of the side hole 131 gradually increases along a direction away from the stress diffusion tube 12, the guide wire assembly 2 includes a stopper guide wire 21 and a guide wire base 22, the catheter base 11 is connected with the guide wire base 22, and the stopper guide wire 21 is inserted into the catheter assembly 1.
In the invention, the side hole 131 of the perfusion catheter is designed more reasonably, the stepped side hole 131 is adopted, so that the medicine output of each hole is more even, the developing structure is improved, the head end can be developed, the developing points are added to the side hole 131 sections, the sizes of the side holes 131 between two adjacent developing points are different, an operator can be clearly guided to perform an operation, and the integral operation efficiency and safety are improved.
The conduit seat 11 is connected with the stress diffusion tube 12 through hot melting, pre-embedded injection molding or gluing. It should be noted that the present invention does not specifically require and limit the structural features such as the size, shape, and material of the catheter hub 11, and the catheter hub 11 serves as a catheter penetration platform and is an essential component of the catheter system, so it is understood that other catheter hubs 11 capable of performing such functions may be used in the present invention, and those skilled in the art may adapt the size, shape, and material of the catheter hub 11 according to the use scenario and the test conditions.
The spray pipe 13 is connected with the stress diffusion pipe 12 by means of hot melting or gluing. It should be noted that the present invention does not specifically require and limit the structural features of the liquid ejecting tube 13, such as size, shape, and material, and the liquid ejecting tube 13 is an essential part of the catheter system in the present invention, so it can be understood that other liquid ejecting tubes 13 capable of performing such functions can be used in the present invention, and those skilled in the art can adapt the size, shape, and material of the liquid ejecting tube 13 according to the use scenario and the test condition.
The liquid spraying pipe 13 is provided with a reducing structure 132 at one end far away from the stress diffusion pipe 12, and the reducing structure 132 is used for clamping the guide wire assembly 2. It should be noted that the reducing structure 132 and the plug 213 are cooperatively arranged to prevent the medical liquid from flowing out of the distal end of the liquid spraying tube 13, and the reducing structure 132 is made of a developing material, so that an operator can clearly observe specific conditions by contacting with equipment such as contrast, ultrasound, etc.
The plug guide wire 21 comprises a support spring 211, a core wire 212, a plug 213 and a winding wire 214 which are connected in sequence, and the core wire 212 is inserted into the guide wire seat 22 after being bent. The outer diameter of the plug 213 is larger than that of the winding wire 214, the outer diameter of the plug 213 is larger than that of the core wire 212, and the plug 213 and the reducing structure 132 are arranged in a matching manner. The wire guide seat 22 is provided therein with a shielding structure 221, an inner diameter of the shielding structure 221 is smaller than an outer diameter of the support spring 211, and an inner diameter of the shielding structure 221 is smaller than an outer diameter of the core wire 212 after bending. In the present invention, the inner diameter of the shielding structure 221 is smaller than the outer diameter of the supporting spring 211 and smaller than the outer diameter of the core wire 212 after being bent, so that the guide wire holder 22 is shielded by the supporting spring 211 or the bent portion of the core wire 212 no matter which direction the guide wire holder 22 moves along the choke plug guide wire 21, and the guide wire holder 22 cannot be separated from the choke plug guide wire 21.
At least one side hole 131 between adjacent developing rings is arranged, the side holes 131 are square side holes or circular side holes, the distances between the adjacent developing rings are the same or different, the side holes 131 are arranged in a staggered manner, and the hole diameters of the side holes 131 between the adjacent developing rings are different. If the liquid spraying pipe 13 is provided with four developing rings, namely a first developing ring 14, a second developing ring 15, a third developing ring 16 and a fourth developing ring 17, wherein the aperture of a single side hole 131 between the first developing ring 14 and the second developing ring 15 is smaller than the aperture of a single measurement and control between the second developing ring 15 and the third developing ring 16, and so on, the aperture of a single measurement and control between the second developing ring 15 and the third developing ring 16 is smaller than the aperture of a single measurement and control between the third developing ring 16 and the fourth developing ring 17, and the injection pressures of different side holes 131 are inconsistent due to inconsistent distances between the side holes 131 and the conduit seat 11, the design of the present invention can offset the differences.
The use method of the perfusion catheter in the invention comprises the following steps:
when the catheter assembly 1 is introduced into the human body along the guide wire previously inserted into the human body, since the reducing structure 132 of the liquid ejecting tube 13 of the catheter assembly 1 is made of a developing material, the position of the catheter assembly 1 can be clearly seen with the aid of the DSA equipment. When the catheter assembly 1 reaches the designated location (i.e. the location where thrombolysis is desired), penetration is stopped. The guide wire is taken out and replaced by the guide wire component 2. The end of the wire wrap 214 of the dead-end guidewire 21 of the guidewire assembly 2 is threaded into the catheter hub 11 of the catheter assembly 1 such that the guidewire assembly 2 is threaded into the body along the lumen of the spray tube 13 of the catheter assembly 1. When the plug 213 of the plug guide wire 21 of the guide wire assembly 2 contacts the reducing structure 132 of the liquid spray tube 13 of the catheter assembly 1, the penetration is stopped, and the catheter holder 11 of the catheter assembly 1 is screwed with the guide wire holder 22 of the guide wire assembly 2. A syringe of appropriate size is used to withdraw a sufficient amount of thrombolytic drug and the syringe is screwed onto the guidewire seat 22 of the guidewire assembly 2. The injector is pushed to inject the thrombolytic drug into the lumen of the liquid jet 13 of the catheter assembly 1. Since the stopper 213 of the stopper guide wire 21 of the guide wire assembly 2 has blocked the port of the liquid spray tube 13 of the catheter assembly 1, the thrombolytic drug can only flow out from the side hole 131 of the liquid spray tube 13 of the catheter assembly 1, thereby achieving the purpose of accurate thrombolysis.
In another embodiment, the present invention provides the use of an infusion catheter for use in the field of medical thrombolytic surgery.
It should be noted that the present invention can also be used for high pressure injection, when the catheter seat 11 of the catheter is screwed with the guide wire seat 22 of the guide wire assembly 2, the guide wire seat 22 of the guide wire assembly 2 is connected with a high pressure injection gun, and the high pressure injection gun directly injects thrombolytic drug or contrast agent into the inner cavity of the liquid injection tube 13 of the catheter assembly 1; and the present invention may also be used without the guidewire assembly 2. I.e. after the catheter assembly 1 has been inserted into the body, the catheter hub 11 of the catheter assembly 1 is connected to a high-pressure injection gun which injects thrombolytic drug or contrast agent directly into the lumen of the liquid jet 13 of the catheter assembly 1.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (10)

1. The utility model provides an infusion pipe, its characterized in that, infusion pipe includes the pipe assembly and inserts the seal wire subassembly to the pipe assembly in, the pipe assembly is including pipe seat, stress diffusion tube and the hydrojet that connects gradually, be provided with four at least development rings on the hydrojet, it is adjacent be provided with the side opening on the hydrojet between the development ring, just the sectional area of side opening is along keeping away from the direction crescent of stress diffusion tube, the seal wire subassembly includes end cap seal wire and guide wire seat, the pipe seat is connected the guide wire seat, the end cap seal wire runs through insert extremely in the pipe assembly.
2. The perfusion catheter of claim 1, wherein the catheter hub is connected with the stress diffusion tube by means of hot melting, pre-cast injection molding or gluing.
3. The irrigation catheter as recited in claim 1 or 2, wherein the spout tube is attached to the stress spreader tube by heat staking or adhesive bonding.
4. The perfusion catheter of any one of claims 1-3, wherein the liquid jet tube is provided with a diameter-changing structure at an end away from the stress diffusion tube, and the diameter-changing structure is used for clamping the guide wire assembly.
5. The perfusion catheter according to any one of claims 1-4, wherein the plug guide wire comprises a support spring, a core wire, a plug and a winding wire which are connected in sequence, and the core wire is inserted into the guide wire seat after being bent.
6. The irrigation catheter as recited in claim 5, wherein a shielding structure is disposed within the guidewire seat, an inner diameter of the shielding structure being smaller than an outer diameter of the support spring, and an inner diameter of the shielding structure being smaller than an outer diameter of the core wire after bending.
7. The irrigation catheter as recited in claim 5, wherein the plug has an outer diameter that is greater than an outer diameter of the wire wrap and an outer diameter that is greater than an outer diameter of the core wire, the plug and the reducing structure being cooperatively disposed.
8. The perfusion catheter of any one of claims 1-7, wherein at least one side hole is provided between adjacent visualization rings, the side hole being a square side hole or a circular side hole;
preferably, the side holes are arranged in a staggered manner;
preferably, the hole diameters of the side holes are different between adjacent developing rings.
9. The irrigation catheter as recited in any one of claims 1-8, wherein a distance between adjacent visualization rings is the same.
10. Use of a perfusion catheter according to any of claims 1-9, in the field of medical thrombolysis.
CN202210626348.6A 2022-06-02 2022-06-02 Perfusion catheter and application thereof Pending CN114948085A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117398572A (en) * 2023-10-27 2024-01-16 心凯诺医疗科技(上海)有限公司 Novel vascular perfusion catheter assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020124551A1 (en) * 2018-12-19 2020-06-25 深圳市业聚实业有限公司 Novel microcatheter
CN111820992A (en) * 2020-08-17 2020-10-27 北京华脉泰科医疗器械有限公司 Thrombolytic catheter device
CN216495502U (en) * 2021-11-17 2022-05-13 江苏金泰医疗器械有限公司 Catheter for taking thrombus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020124551A1 (en) * 2018-12-19 2020-06-25 深圳市业聚实业有限公司 Novel microcatheter
CN111820992A (en) * 2020-08-17 2020-10-27 北京华脉泰科医疗器械有限公司 Thrombolytic catheter device
CN216495502U (en) * 2021-11-17 2022-05-13 江苏金泰医疗器械有限公司 Catheter for taking thrombus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117398572A (en) * 2023-10-27 2024-01-16 心凯诺医疗科技(上海)有限公司 Novel vascular perfusion catheter assembly
CN117398572B (en) * 2023-10-27 2024-08-13 心凯诺医疗科技(上海)有限公司 Vascular perfusion catheter assembly

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