CN116271444A - Balloon type auxiliary catheter and use method thereof - Google Patents

Balloon type auxiliary catheter and use method thereof Download PDF

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Publication number
CN116271444A
CN116271444A CN202211491071.7A CN202211491071A CN116271444A CN 116271444 A CN116271444 A CN 116271444A CN 202211491071 A CN202211491071 A CN 202211491071A CN 116271444 A CN116271444 A CN 116271444A
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CN
China
Prior art keywords
balloon
catheter
auxiliary
retraction
caliber
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Pending
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CN202211491071.7A
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Chinese (zh)
Inventor
黄文伟
王昂
刘子杰
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Guangzhou Yijie Medical Technology Co ltd
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Guangzhou Yijie Medical Technology Co ltd
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Priority to CN202211491071.7A priority Critical patent/CN116271444A/en
Publication of CN116271444A publication Critical patent/CN116271444A/en
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    • 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
    • A61M25/10—Balloon catheters
    • A61M25/1002—Balloon catheters characterised by balloon shape
    • 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
    • A61M25/10—Balloon catheters
    • A61M25/1018—Balloon inflating or inflation-control devices
    • 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
    • A61M25/10—Balloon catheters
    • A61M25/1025—Connections between catheter tubes and inflation tubes
    • 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
    • A61B2017/22051—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 an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
    • 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
    • A61B2017/22051—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 an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
    • A61B2017/22065—Functions of balloons
    • 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
    • A61B2017/22051—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 an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
    • A61B2017/22065—Functions of balloons
    • A61B2017/22067—Blocking; Occlusion
    • 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1045—Balloon catheters with special features or adapted for special applications for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations
    • 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
    • A61M25/10—Balloon catheters
    • A61M2025/1043—Balloon catheters with special features or adapted for special applications
    • A61M2025/1079—Balloon catheters with special features or adapted for special applications having radio-opaque markers in the region of the balloon

Abstract

The invention relates to the technical field of navigation auxiliary tools of medical catheters, in particular to a balloon type auxiliary catheter and a use method thereof, wherein the balloon type auxiliary catheter comprises an auxiliary catheter and a balloon for assisting a large-caliber catheter to pass through a bifurcation vessel port; the sacculus is arranged on the auxiliary catheter, and a passage communicated with the sacculus is arranged on the auxiliary catheter; the working medium can be filled into the balloon or extracted from the balloon through the passage, so that the balloon expands or contracts; the outer surface of the balloon is provided with a retraction net which can deform along with the inflation and deflation of the balloon. When the large-caliber catheter moves to the bifurcation vessel port, the inflated saccule can play a good guiding role on the large-caliber catheter, and the situation that the large-caliber catheter port is propped against the bifurcation vessel wall can be effectively avoided; when the thrombus of the small-caliber blood vessel at the farther position needs to be sucked, the saccule can be retracted from the working medium and is restored under the restraint of the retraction net, so that the thrombus can be conveniently sucked from the blood vessel at the farther position.

Description

Balloon type auxiliary catheter and use method thereof
Technical Field
The invention relates to the technical field of navigation auxiliary tools of medical catheters, in particular to a balloon type auxiliary catheter and a using method thereof.
Background
The interventional therapy is a minimally invasive therapy performed by using modern high-tech means, namely, under the guidance of medical imaging equipment, special precise instruments such as a catheter, a guide wire and the like are introduced into a human body to diagnose and treat the in vivo pathological condition locally.
The large-caliber catheters such as the suction catheter or the far-end access catheter are an interventional medical instrument commonly used at present, can directly perform suction treatment on an occluded blood vessel, and can extract substances such as thrombus, clot, fragments and the like in an artery out of the body of a patient, so that normal circulation of blood in the blood vessel of the patient is restored, if suction fails or the blood vessel thrombus position cannot be reached, a good access can be provided for subsequent operation, the time of the patient for performing the thrombus extraction operation is reduced, and the operability and the efficiency of the interventional operation are improved.
However, since the large-diameter catheter passes along the outer curved wall portion of the blood vessel and is stuck to the wall at the branching position of the blood vessel, the catheter port is likely to abut against the wall of the blood vessel to be branched, and if the catheter port is forced to pass through, the wall of the blood vessel may be damaged, and in extreme cases, the catheter port may not pass through.
In addition, in addition to removing the thrombus from the blood vessel at the position with larger diameter, it is also necessary to take account of the removal of some fine thrombus from the blood vessel at the position which escapes further or the removal of some fine thrombus which itself occurs at the position which is further. At present, no instrument which has a simple structure and can continuously push and suck the small thrombus without withdrawing after the large thrombus is sucked is available.
Disclosure of Invention
The invention provides a balloon type auxiliary catheter which is simple in structure and arrangement, can assist the large-caliber catheter to smoothly pass through a bifurcation position of a blood vessel and can rapidly withdraw the more distant tiny thrombus, and a use method thereof, and aims to solve the technical problems that the large-caliber catheter is difficult to smoothly pass through the bifurcation position of the blood vessel and the more distant tiny thrombus is not more convenient to withdraw.
In order to solve the technical problems, the invention adopts the following technical scheme: a balloon type auxiliary catheter, which comprises an auxiliary catheter and a balloon for assisting a large-caliber catheter to pass through a bifurcation vascular port; the auxiliary catheter is arranged in the large-caliber catheter in a penetrating mode, the balloon is arranged on the auxiliary catheter, and a passage communicated with the balloon is arranged on the auxiliary catheter; the working medium can be filled into the balloon or extracted from the balloon through the passage, so that the balloon expands or contracts; the outer surface of the balloon is provided with a retraction net which can deform along with the inflation and the deflation of the balloon.
The balloon is arranged on the auxiliary catheter, the retraction net is sleeved on the balloon, a passage communicated with the balloon is arranged on the auxiliary catheter, working medium can be filled into the balloon or the working medium in the balloon can be extracted out through the passage, so that the balloon is expanded or contracted, the retraction net can be expanded when the balloon is expanded, and the retraction net can be retracted and reset under the action of self-elasticity when the balloon is contracted. In the use process, the auxiliary catheter is positioned inside the large-caliber catheter, when the large-caliber catheter moves to the bifurcation vascular port, the inflated saccule can play a good guiding role on the large-caliber catheter, the situation that the large-caliber catheter port abuts against the bifurcation vascular wall can be effectively avoided, the large-caliber catheter can smoothly and efficiently pass through the bifurcation vascular port, and meanwhile, the damage to the vascular wall can be reduced. In addition, when the balloon is contracted, the arrangement of the retraction net can play a role in shaping and binding the balloon, so that the balloon can be smoothly restored to the original shape, the whole auxiliary catheter can still move in the distal direction under the condition of keeping a small caliber, and the suction of the small thrombus is realized.
Preferably, the retraction net is a silk net with retraction elasticity; the retraction net is tightly sleeved on the outer surface of the saccule by self elasticity.
Preferably, both ends of the retraction net are respectively connected with a proximal end part and a distal end part; the proximal end part and the distal end part are sleeved on the auxiliary catheter.
Preferably, at least one of the proximal portion and the distal portion is fixedly attached to the auxiliary catheter.
Preferably, the retraction net is made of nickel-titanium alloy or nonmetallic material with elasticity.
Preferably, the shape of the balloon after filling is spindle-shaped, or elemene-shaped, or cylindrical in the middle, and the two ends are respectively shuttle-head-shaped, bullet-shaped or round-table-shaped.
Preferably, when the balloon is not filled with working medium, the radial length of the cross section of the retraction net is 1.3-1.4 times of the outer diameter length of the auxiliary catheter.
The application method of the balloon type auxiliary catheter is suitable for the balloon type auxiliary catheter, and comprises the following steps of:
when the large-caliber catheter moves to the bifurcation position of the blood vessel, the large-caliber catheter is firstly suspended to move, and an auxiliary catheter positioned in the large-caliber catheter is pushed;
when the balloon on the auxiliary catheter moves to the bifurcation vessel port, working medium is filled into the balloon through a passage on the auxiliary catheter, so that the balloon is inflated, and the retraction net is simultaneously expanded along with the inflation of the balloon;
then the large-caliber catheter is continuously pushed, and smoothly passes through the bifurcation vessel port under the guiding action of the expanded saccule;
after the large-caliber catheter passes through the bifurcation vessel port, the large-caliber catheter continues to advance in the distal direction, and the auxiliary catheter can be kept still or can be retracted in the proximal direction.
Preferably, when the balloon is positioned at 1/3-2/3 of the distance from the distal end of the balloon to the bifurcation vessel port, working medium is filled into the balloon through a passage on the auxiliary catheter, so that the balloon is inflated.
Preferably, after the large-caliber catheter passes through the bifurcation vessel port, working medium in the balloon is extracted through a passage on the auxiliary catheter, the balloon and the retraction net shrink and reset, and the auxiliary catheter can continue to move in the distal direction.
Compared with the prior art, the invention has the beneficial effects that:
1) When the large-caliber catheter moves to the bifurcation vascular port, the inflated saccule can play a good guiding role on the large-caliber catheter, can effectively avoid the condition that the large-caliber catheter port is propped against the bifurcation vascular wall, is convenient for the large-caliber catheter to pass through the bifurcation vascular port smoothly and efficiently, can obtain more treatment time for patients, and can reduce the damage to the vascular wall.
2) According to the invention, the inflatable and contractible balloon and the retraction net capable of deforming along with the inflation and contraction of the balloon are arranged, so that when the large-caliber catheter moves to the bifurcation vessel port, working medium can be filled into the balloon to expand the balloon, a guiding effect is provided for the large-caliber catheter, the large-caliber catheter can smoothly pass through the bifurcation vessel port, when the auxiliary catheter is required to continuously move to the far end to suck small thrombus, the working medium in the balloon can be extracted, the balloon is contracted, and meanwhile, the balloon can be contracted and reset more regularly under the constraint of the retraction net, so that the auxiliary catheter can smoothly move to the far end.
Drawings
FIG. 1 is a schematic diagram of a prior art large diameter catheter against a bifurcated angiogenic windowsill effect;
FIG. 2 is a schematic view of the structure of the balloon-type auxiliary catheter (balloon inflation) of the present invention;
FIG. 3 is a schematic view of another angle of the balloon catheter (balloon inflation) of the present invention;
FIG. 4 is a schematic view of the structure of the balloon catheter (balloon deflation) of the present invention;
FIG. 5 is a schematic structural view of a cross-section of a balloon catheter (balloon deflation) of the present invention;
FIG. 6 is a schematic structural view of a cross section of a balloon-type auxiliary catheter (balloon inflation) of the present invention
FIG. 7 is a schematic view of the balloon-assisted catheter of the present invention being moved to a bifurcated vessel port;
FIG. 8 is a schematic view of the balloon-type auxiliary catheter of the present invention assisting in the passage of a large caliber catheter through a bifurcated vessel port;
FIG. 9 is a schematic view of the large diameter catheter of the present invention continuing to move distally through a bifurcated vessel port;
FIG. 10 is a schematic view of the proximal retraction of the balloon catheter of the present invention;
FIG. 11 is a schematic structural view of an embodiment 9 of a balloon-type auxiliary catheter of the present invention;
FIG. 12 is a schematic view of the structure of a blood vessel at the site of vascular embolic lesions;
fig. 13 is a schematic view showing the structure of the balloon-type auxiliary catheter of the present invention for assisting the aspiration of thrombus by the large caliber catheter.
In the accompanying drawings: 1-an auxiliary catheter; 2-balloon; 31-retraction net; 311-a first ring; 312-a second ring; 313-first wire; 314-a second thread; 32-proximal end; 33-distal end; 101-large caliber catheter; 102-bifurcation vessel port; 103-thrombosis.
Detailed Description
The present invention will be described in further detail with reference to the drawings, embodiments, and modifications, for the purpose of making the objects, technical solutions, and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
For the purpose of more clear description of the present invention, the terms "distal" and "proximal" are defined herein as terms commonly used in the field of interventional medical devices. Specifically, "distal" refers to the end of the procedure that is distal to the operator, and "proximal" refers to the end of the procedure that is proximal to the operator. Of course, for a single device object, the "proximal" end may also be the end that is proximal to the operator, and the "distal" end may also be the end that is distal to the operator.
In addition, for convenience in describing the individual parts, components, etc., the present invention will be described using "left", "right", "front", "rear", "up", "down", etc. to indicate the positional relationship; the description with serial numbers such as "first", "second", and the like in the present invention is used in principle only to distinguish the described objects, and does not relate to any significance distinction, arrangement distinction. The terms describing the positional relationship in the drawings are merely for illustrative purposes and are not to be construed as limiting the patent, and specific meanings of the terms described above will be understood by those of ordinary skill in the art according to specific circumstances.
As shown in fig. 1, when a large-diameter catheter 101 passes through a bifurcated vessel port along the wall of the vessel, the catheter port is likely to abut against the bifurcated vessel wall, and if the catheter port is forced to pass through, the vessel wall may be damaged, and in extreme cases, the catheter port may not pass through, and in addition, in the actual treatment process, there may be more than one thrombus, particularly, there may be a thrombus in a vessel having a larger diameter, and there may be a fine thrombus in a vessel in a further direction. Therefore, in addition to removing the thrombus from the blood vessel at the position with a larger diameter, it is possible to take into account the need to withdraw some of the fine thrombus from the blood vessel at the position which escapes farther or the need to withdraw some of the fine thrombus which itself occurs at the position farther. Accordingly, the present invention provides a balloon-type auxiliary catheter capable of assisting the passage of the large-caliber catheter 101 through the bifurcated vessel port 102.
The technical scheme of the invention is further specifically described by the following specific embodiments with reference to the accompanying drawings:
example 1
As shown in fig. 2-6, an embodiment 1 of a balloon-type auxiliary catheter is shown, wherein the balloon-type auxiliary catheter includes an auxiliary catheter 1, a balloon 2 and a retraction net 31, the auxiliary catheter 1 is a common auxiliary catheter in interventional medical treatment, and the auxiliary catheter 1 is made of medical PTFE, HDPE or PEBAX, and the material of the auxiliary catheter 1 is not limited thereto, and any other material that meets the requirements of interventional medical treatment may be used.
As a preferred technical solution, in this embodiment, a developing ring or a developing block is disposed in the distal direction of the auxiliary catheter 1, and specifically, the developing ring or the developing block is connected to the auxiliary catheter 1 by bonding or embedding, and the developing ring/the developing block may be made of at least one of gold, silver, platinum, iridium, cobalt, and chromium.
The balloon 2 is arranged at the distal end position of the auxiliary catheter 1, the balloon 2 is used for assisting the large-caliber catheter 101 to smoothly pass through the bifurcation position of the blood vessel, specifically, the auxiliary catheter 1 is penetrated in the large-caliber catheter 101, the auxiliary catheter 1 can carry the balloon 2 to move in the large-caliber catheter 101, wherein the large-caliber catheter 101 can be a suction catheter or a distal passage catheter, the large-caliber catheter 101 in the embodiment is a suction catheter, the suction catheter is made of medical PTFE, HDPE or PEBAX, the suction catheter is not limited by the material of the suction catheter, and other materials meeting the requirement of interventional medical treatment can be adopted. In this embodiment, the aspiration catheter is made of medical PTFE.
In this embodiment, the inner diameter D1 of the suction catheter is 2.0mm, the outer diameter D1' of the suction catheter is 1.03 times the inner diameter D1 of the suction catheter, and the outer diameter D3 of the auxiliary catheter 1 is 0.4 times the inner diameter D1 of the suction catheter.
The side wall of the auxiliary catheter 1 is provided with a passage, the passage is communicated with the balloon 2, the balloon 2 can be inflated with working medium or the working medium in the balloon 2 can be extracted through the passage on the auxiliary catheter 1, so that the balloon 2 can be expanded or contracted, the balloon 2 can be made of rubber, silica gel, polyurethane, nylon, PEBAX or other high polymer materials, the balloon 2 can be made of rubber in the embodiment, the working medium for inflating the balloon 2 can be normal saline, contrast agent or the like, and the working medium for inflating the balloon 2 in the embodiment is normal saline.
Specifically, the balloon 2 is formed by stretching a balloon tube to form a blastula, filling high-pressure gas, heating at the same time, forming the balloon under the shaping of a die, and bonding or hot melting two ends of the balloon 2 to be connected to the auxiliary catheter 1.
The middle of the balloon 2 filled with the working medium is cylindrical, the two ends are in a shuttle head shape or a bullet head shape or a round table shape, in the embodiment, the middle of the balloon 2 filled with the working medium is cylindrical, and the two ends are in a round table shape.
The length L1 of the balloon 2 which is not inflated is 20mm, and the length L1' of the balloon 2 after inflation is 1.1 times the length L1 of the balloon 2 which is not inflated. The length L1 of the balloon 2 after being inflated and the length L1' of the balloon 2 after being inflated are both the length of the contour line of the axial section of the balloon 2.
The outer surface of the balloon 2 is provided with the retraction net 31, the retraction net 31 can deform along with the expansion or contraction of the balloon 2, the retraction net 31 can be unfolded when the balloon 2 is expanded, after the balloon 2 is contracted, the retraction net 31 can retract and reset by virtue of self elasticity, the arrangement of the retraction net 31 can effectively shape the contracted balloon 2, the balloon 2 can be quickly restored to the shape before the expansion of the balloon 2, and the auxiliary catheter 1 can further continuously move towards the distal direction to suck small thrombus when required.
Specifically, the retraction net 31 is a wire mesh with retraction elasticity, the retraction net 31 is tightly sleeved on the outer surface of the balloon 2 by means of self elasticity, the retraction net 31 is made of nickel-titanium alloy, specifically, the retraction net 31 is obtained by cutting and post-treatment forming through a nickel-titanium tube with a proper size. When the balloon 2 is not filled with working medium, the radial length D2 of the cross section of the retraction net 31 is 1.3 times as long as the outer diameter length D3 of the auxiliary catheter 1.
The retraction net 31 is uniformly distributed with grids, and after the retraction net 31 is expanded along with the expansion of the balloon 2, the grids on the retraction net 31 are diamond-shaped, wherein two ends of the retraction net 31 are respectively connected with the proximal end 32 and the distal end 33, the proximal end 32 and the distal end 33 are sleeved on the auxiliary catheter 1, and the proximal end 32 and the distal end 33 are also grid-shaped in the embodiment.
Specifically, the proximal end and the distal end of the retraction mesh 31 are respectively provided with a first ring 311 and a second ring 312, the first ring 311 is connected to the proximal end 32 through a plurality of first wires 313, in this embodiment, the first wires 313 are two in total, and the second ring 312 is connected to the distal end 33 through a plurality of second wires 314, in this embodiment, the second wires 314 are two in total.
In this embodiment, after the balloon 2 is inflated, the retraction mesh 31 is located at the middle cylindrical position of the balloon 2, and the first ring 311 and the second ring 312 are respectively located at two end edges of the middle cylindrical shape of the balloon 2, wherein the first wire 313 and the second wire 314 are respectively located on the side walls of the two ends of the balloon 2 in the shape of a truncated cone.
As a preferred embodiment, the material of the proximal portion 32 and the distal portion 33 in this embodiment may be nickel-titanium alloy, specifically, the proximal portion 32 and the distal portion 33 are each formed by cutting and post-processing a nickel-titanium tube with a suitable size.
In this embodiment, the proximal portion 32 and the distal portion 33 are movably sleeved on the auxiliary catheter 1, that is, the proximal portion 32 and the distal portion 33 are not fixedly connected with the auxiliary catheter 1, and the fixation of the retraction mesh 31 on the balloon 2 is firmly attached to the surface of the balloon 2 only by means of self elastic force.
In this embodiment, the first ring 311, the second ring 312, the first wire 313 and the second wire 314 are made of elastic nonmetallic materials to ensure the expansion or contraction of the retraction net 31, specifically, the first ring 311, the second ring 312, the first wire 313 and the second wire 314 can be tpu or tpee, and in this embodiment, the first ring 311, the second ring 312, the first wire 313 and the second wire 314 are tpu.
The retraction mesh 31, the proximal portion 32, the distal portion 33, the first loop 311, the second loop 312, the first wire 313 and the second wire 314 form a retraction mesh, the length L2 of the retraction mesh when the balloon is not inflated is 1.0 times the length L1 of the balloon 2, and the length L2' of the retraction mesh after the balloon is inflated is 1.05 times the length L1 of the balloon 2. The length L2 of the retraction rack when the balloon is not filled and the length L2' of the retraction rack after the balloon is filled are both the length of the axial section contour line of the retraction rack.
The invention relates to a using method of a balloon type auxiliary catheter, which comprises the following steps:
the position of the vascular embolic lesion is shown in fig. 12, and the situation that the blood vessel near the focus or near the thrombus 103 is bent or the branch blood vessel exists is shown, and the use situation of the present invention in clinical treatment is shown in fig. 13, wherein the specific use method is as follows:
the suction catheter can be accessed from the radial artery or the femoral artery, and when the suction catheter moves to the bifurcation position of the blood vessel, the suction catheter is firstly suspended to move, and the auxiliary catheter 1 positioned in the suction catheter is pushed;
as shown in fig. 7, when the balloon 2 on the auxiliary catheter 1 moves to the bifurcated vessel port 102, working medium is filled into the balloon 2 through the passage on the auxiliary catheter 1, so that the balloon 2 is inflated, and the retraction mesh 31 is simultaneously expanded along with the inflation of the balloon 2;
as shown in fig. 8, the suction catheter is then advanced further, and the suction catheter orifice is guided by the inflated balloon 2 to pass smoothly through the bifurcation site;
after the aspiration catheter has passed through bifurcated vessel port 102, the aspiration catheter continues to be advanced in the distal direction, balloon 2 and retraction mesh 31 remain stationary, as shown in fig. 9, or auxiliary catheter 1 is withdrawn in the proximal direction with balloon 2 and retraction mesh 31, as shown in fig. 10.
After the aspiration catheter passes through the bifurcated vessel port 102, working medium in the balloon 2 can be extracted through a passage on the auxiliary catheter 1, and the balloon 2 and the retraction net 31 are retracted and reset, so that the auxiliary catheter 1 can be moved to a more distal position for aspiration of the small thrombus.
As a preferable technical scheme, when the position 1/3-2/3 of the balloon 2 away from the distal end of the balloon 2 moves to the bifurcation vessel port 102, the working medium is filled into the balloon 2 through the passage on the auxiliary catheter 1, so that the balloon 2 is inflated, and when the position 1/2 of the balloon 2 moves to the bifurcation vessel port 102 in this embodiment, the working medium is filled into the balloon 2 through the passage on the auxiliary catheter 1, so that the balloon 2 is inflated.
When the large-caliber catheter 101 moves to the bifurcation vessel port 102, the guide effect of the balloon 2 and the retraction net 31 can facilitate the large-caliber catheter 101 to smoothly and efficiently pass through the bifurcation vessel port 102, so that the condition that the port of the large-caliber catheter 101 is propped against the bifurcation vessel wall can be effectively avoided, the damage to the vessel wall is reduced, and more treatment time can be obtained for patients. In addition, when the working medium in the balloon 2 is extracted, the balloon 2 is contracted, the retraction net 31 can perform the functions of shaping and binding on the balloon 2, so that the balloon 2 can be smoothly restored to the original shape, the whole auxiliary catheter 1 can still move in the far-end direction under the condition of keeping a small caliber, and the suction of the small thrombus is realized.
Example 2
This embodiment is an embodiment 2 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the retraction net 31 is made of a non-metal material with elasticity, specifically, tpu or tpee is selected, and in this embodiment, the retraction net 31 is made of tpu.
Example 3
This embodiment is an embodiment 3 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the proximal portion 32 and the distal portion 33 are made of a non-metal material with elasticity, specifically, tpu or tpee is selected, and in this embodiment, both the proximal portion 32 and the distal portion 33 are made of tpu.
Example 4
This embodiment is an embodiment 4 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, at least one of the proximal portion 32 and the distal portion 33 is fixedly sleeved on the auxiliary catheter 1, and specifically, in this embodiment, the proximal portion 32 is fixedly adhered to the outer wall of the auxiliary catheter 1.
Example 5
This embodiment is an embodiment 5 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the proximal portion 32 and the distal portion 33 are fixedly sleeved on the auxiliary catheter 1, and specifically, in this embodiment, the proximal portion 32 and the distal portion 33 are fixedly adhered to the outer wall of the auxiliary catheter 1.
Example 6
This embodiment is embodiment 6 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, at least one of two ends of the balloon 2 is provided with a developing ring/developing block, specifically, the developing ring or the developing block is connected to the end of the balloon 2 by bonding or embedding, and the developing ring/developing block may be made of at least one of gold, silver, platinum, iridium, cobalt and chromium, and in this embodiment, both ends of the balloon 2 are provided with developing rings.
Example 7
This embodiment is an embodiment 7 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the inner diameter D1 of the suction duct is 3.5mm, the outer diameter D1' of the suction duct is 1.08 times the inner diameter D1 of the suction duct, and the outer diameter D3 of the auxiliary duct 1 is 0.5 times the inner diameter D1 of the suction duct.
The length L1 of the balloon 2 which is not inflated is 25mm, and the length L1' of the balloon 2 after inflation is 1.2 times the length L1 of the balloon 2 which is not inflated. The length L2 of the retraction rack when the balloon is not filled is 2.0 times of the length L1 of the balloon 2, and the length L2' of the retraction rack after the balloon is filled is 1.15 times of the length L1 of the balloon 2.
In this embodiment, when the balloon 2 is not filled with working medium, the radial length D2 of the cross section of the retraction mesh 31 is 1.4 times the outer diameter length D3 of the auxiliary catheter 1.
Example 8
This embodiment is an embodiment 8 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the inner diameter D1 of the suction duct is 3.0mm, the outer diameter D1' of the suction duct is 1.05 times the inner diameter D1 of the suction duct, and the outer diameter D3 of the auxiliary duct 1 is 0.45 times the inner diameter D1 of the suction duct.
The length L1 of the balloon 2 which is not inflated is 22mm, and the length L1' of the balloon 2 after inflation is 1.15 times the length L1 of the balloon 2 which is not inflated. The length L2 of the retraction rack when the balloon is not filled is 1.5 times of the length L1 of the balloon 2, and the length L2' of the retraction rack after the balloon is filled is 1.1 times of the length L1 of the balloon 2.
In this embodiment, when the balloon 2 is not filled with working medium, the radial length D2 of the cross section of the retraction mesh 31 is 1.35 times the outer diameter length D3 of the auxiliary catheter 1.
Example 9
This embodiment is an embodiment 9 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the balloon 2 is spindle-shaped, olive-shaped or cigar-shaped after being filled with the working medium, and the balloon 2 is arranged in such a structure so as to have a better guiding effect on the large-caliber catheter 101.
Example 10
This embodiment is an embodiment 10 of a balloon catheter, which is different from embodiment 1 in that: the wall thickness of the retraction web 31 in this embodiment may range from 0.05 to 0.1mm, and specifically the wall thickness of the retraction web 31 in this embodiment ranges from 0.08mm.
Example 11
This embodiment is an embodiment 11 of a balloon catheter, which is different from embodiment 1 in that: in this embodiment, the middle of the balloon 2 after being filled with the working medium is cylindrical, the two ends of the balloon 2 are in a shuttle head shape, a bullet head shape or a round table shape, the middle of the balloon 2 after being filled with the working medium is cylindrical, the two ends of the balloon are in a round table shape, the length L3 of the middle cylinder of the balloon 2 after being filled is 1.1-1.2 times of the length L1 of the balloon 2 after not being filled, and in this embodiment, the length L3 of the middle cylinder of the balloon 2 after being filled is 1.15 times of the length L1 of the balloon 2 after not being filled. The length L1 of the balloon 2 which is not filled and the length L3 of the middle cylinder after the balloon 2 is filled are both the length of the contour line of the axial section of the balloon 2.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (10)

1. A balloon-type auxiliary catheter, which is characterized in that: comprises an auxiliary catheter (1) and a balloon (2) for assisting the large-caliber catheter (101) to pass through the bifurcation vascular port; the auxiliary catheter (1) is arranged in the large-caliber catheter (101) in a penetrating mode, the balloon (2) is arranged on the auxiliary catheter (1), and a passage communicated with the balloon (2) is arranged on the auxiliary catheter (1); the working medium can be filled into the balloon (2) through the passage or the working medium in the balloon (2) can be extracted, so that the balloon (2) is expanded or contracted; the outer surface of the balloon (2) is provided with a retraction net (31) which can deform along with the expansion and contraction of the balloon (2).
2. A balloon catheter according to claim 1, wherein: the retraction net (31) is a silk screen with retraction elasticity; the retraction net (31) is tightly sleeved on the outer surface of the balloon (2) by self elasticity.
3. A balloon catheter according to claim 2, wherein: both ends of the retraction net (31) are respectively connected with a proximal end part (32) and a distal end part (33); the proximal end part (32) and the distal end part (33) are sleeved on the auxiliary catheter (1).
4. A balloon catheter according to claim 3, wherein: at least one of the proximal portion (32) and the distal portion (33) is fixedly connected to the auxiliary catheter (1).
5. A balloon catheter according to any one of claims 2 to 4, wherein: the retraction net (31) is made of nickel-titanium alloy or nonmetallic material with elasticity.
6. A balloon catheter according to any one of claims 2 to 4, wherein: the shape of the balloon (2) after filling is spindle-shaped, or elemene-shaped, or cylindrical in the middle, and the two ends are respectively shuttle-head-shaped, bullet-head-shaped or round-table-shaped.
7. A balloon catheter according to any one of claims 1 to 4, wherein: when the balloon (2) is not filled with working medium, the radial length of the cross section of the retraction net (31) is 1.3-1.4 times of the outer diameter length of the auxiliary catheter (1).
8. A method of using a balloon catheter, adapted for use with the balloon catheter of any one of claims 1-7, characterized by: the specific method comprises the following steps:
when the large-caliber catheter (101) approaches to the bifurcation vascular port, the large-caliber catheter (101) is firstly suspended to move, and an auxiliary catheter (1) positioned in the large-caliber catheter (101) is pushed;
when the balloon (2) positioned on the auxiliary catheter (1) moves to the bifurcation vessel port, working medium is filled into the balloon (2) through a passage on the auxiliary catheter (1), so that the balloon (2) is inflated, and the retraction net (31) is expanded along with the inflation of the balloon (2);
then the large-caliber catheter (101) is continuously pushed, and the large-caliber catheter (101) smoothly passes through the bifurcation vessel port under the guiding action of the expanded saccule (2);
after the large-caliber catheter (101) passes through the bifurcation vascular port, the large-caliber catheter (101) continues to be pushed in the distal direction, and the auxiliary catheter (1) can be kept still or can be retracted in the proximal direction.
9. A balloon catheter according to claim 8, wherein: when the balloon (2) is positioned at 1/3-2/3 of the far end of the balloon (2) and is positioned at the bifurcation vessel port, working medium is filled into the balloon (2) through a passage on the auxiliary catheter (1), so that the balloon (2) is inflated.
10. A balloon catheter according to claim 8, wherein: after the large-caliber catheter (101) passes through the bifurcation vascular port, working medium in the balloon (2) is extracted through a passage on the auxiliary catheter (1), the balloon (2) and the retraction net (31) are retracted and reset, and the auxiliary catheter (1) can continuously move towards the distal direction.
CN202211491071.7A 2022-11-25 2022-11-25 Balloon type auxiliary catheter and use method thereof Pending CN116271444A (en)

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060271093A1 (en) * 2005-05-27 2006-11-30 Holman Thomas J Fiber mesh controlled expansion balloon catheter
US20080097464A1 (en) * 2006-08-23 2008-04-24 Boston Scientific Scimed, Inc. Auxiliary balloon catheter
CN108211089A (en) * 2017-12-30 2018-06-29 苏州茵络医疗器械有限公司 Across valve device and its application method
CN210131240U (en) * 2019-03-29 2020-03-10 中国人民解放军第四军医大学 Special sacculus of coronary artery bifurcation lesion support postdilatation stage
CN210844899U (en) * 2019-09-10 2020-06-26 北京积水潭医院 Device for assisting catheter in passing through blood vessel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060271093A1 (en) * 2005-05-27 2006-11-30 Holman Thomas J Fiber mesh controlled expansion balloon catheter
US20080097464A1 (en) * 2006-08-23 2008-04-24 Boston Scientific Scimed, Inc. Auxiliary balloon catheter
CN108211089A (en) * 2017-12-30 2018-06-29 苏州茵络医疗器械有限公司 Across valve device and its application method
CN210131240U (en) * 2019-03-29 2020-03-10 中国人民解放军第四军医大学 Special sacculus of coronary artery bifurcation lesion support postdilatation stage
CN210844899U (en) * 2019-09-10 2020-06-26 北京积水潭医院 Device for assisting catheter in passing through blood vessel

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