CN115350382A

CN115350382A - Cutting balloon dilatation catheter

Info

Publication number: CN115350382A
Application number: CN202210984138.4A
Authority: CN
Inventors: 刘朝生; 张志军; 杨武锋
Original assignee: Guangdong Bomai Medical Technology Co Ltd
Current assignee: Guangdong Bomai Medical Technology Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-11-18
Anticipated expiration: 2042-08-18
Also published as: CN115350382B

Abstract

The invention discloses a cutting balloon dilatation catheter which comprises a catheter component, a balloon and a cutting assembly, wherein the catheter component comprises an outer tube and an inner tube, and the inner tube is arranged in an inner cavity of the outer tube in a penetrating manner; the saccule is arranged on the inner tube in a surrounding way and is connected with the far end of the outer tube, the saccule is communicated with the inner cavity of the outer tube, and the saccule is used for expanding blood vessels; the cutting assembly comprises a driving assembly and a plurality of cutting knives, the plurality of cutting knife arrays are arranged and arranged, and the driving assembly is used for driving the cutting knives to stretch. Carry the sacculus to narrow pathological change department, thereby make the sacculus full of expansion blood vessel, accomplish the expansion back at blood vessel, make the sacculus lose heart, continue to promote cutting sacculus expansion pipe, carry the outer tube to pathological change department, cutting assembly aligns and waits to cut pathological change department, through control drive assembly, the drive cutting knife stretches out cutting blood vessel pathological change department. The blood vessel is expanded in advance through the saccule, and then the cutting assembly is conveyed to a lesion part, so that the capability of passing through a tortuous blood vessel is improved, and the damage risk of the cutting assembly to a normal blood vessel is reduced.

Description

Cutting balloon dilatation catheter

Technical Field

The application relates to the technical field of medical equipment, in particular to a cutting balloon dilatation catheter.

Background

Vascular intervention therapy is an important treatment mode for revascularization treatment of stenotic lesions. In vascular interventional therapy, a balloon catheter is generally used as a main vascular interventional therapy instrument. For some intravascular stenoses, such as calcifications, plaques or fibrosis, the conventional balloon catheter cannot effectively expand the stenoses, and when the stenoses are treated, the passing capacity of the conventional balloon catheter is poor, and the stenoses are generally pretreated by other instruments. To solve this problem, some medical device companies have developed special balloon products such as cuts and scores.

However, due to the existence of the blades and the blade bases and the special folding mode of the cutting saccule in the prior art, the diameter of the folded saccule is larger, and when stenosis is treated, the passing capacity of the saccule is poorer, and the saccule is generally pretreated by other instruments; meanwhile, the blade is made of stainless steel and fixed on the balloon, so that the overall hardness is high.

Content of application

Because the traditional balloon catheter cannot effectively expand a stenotic lesion part, when the stenotic lesion is treated, the passing capacity of the traditional balloon catheter is poor, and the traditional balloon catheter generally needs to be pretreated by other instruments. Based on the above, there is a need for a cutting balloon dilatation catheter, which can improve the dilatation of the cutting balloon dilatation catheter on blood vessels and the over-bending capability on stenotic lesions, and has safe cutting capability and reduced risk of injury to normal blood vessels during surgery.

The specific technical scheme is as follows:

in one aspect, the present application relates to a cutting balloon dilatation catheter comprising a catheter member, a balloon and a cutting assembly, wherein the catheter member comprises an outer tube and an inner tube, and the inner tube is arranged in a lumen of the outer tube; the saccule is arranged on the inner tube in a surrounding way and is connected with the far end of the outer tube, the saccule is communicated with the inner cavity of the outer tube, and the saccule is used for dilating blood vessels; the cutting assembly comprises a driving assembly and a plurality of cutting knives, the driving assembly is arranged on the outer pipe, the plurality of cutting knives are arranged in an array mode, and the driving assembly is used for driving the cutting knives to stretch.

Above-mentioned cutting sacculus expansion pipe is when using, carries the sacculus to narrow pathological change department to carry gas or liquid in to the sacculus through the inner chamber of outer tube, thereby make the sacculus be full of and expand blood vessel, accomplish the expansion back at blood vessel, take out gas or liquid in the sacculus, make the sacculus lose heart, continue to promote cutting sacculus expansion pipe, carry the outer tube to pathological change department, cutting assembly aligns and waits to cut pathological change department, through control drive assembly, the drive cutting knife stretches out cutting vascular pathological change department. Set up the sacculus through the front end at cutting sacculus expansion pipe, aerify and lose heart, can expand blood vessel in advance, after the vasodilatation is accomplished, carry cutting assembly to pathological change department again, improve the ability through tortuous blood vessel, and reduce the damage risk of cutting assembly to normal blood vessel. In addition, the mode of cutting knife connection on the outer tube compares with the mode of cutting knife lug connection in prior art in the sacculus periphery, and it is less that the whole volume under the folding or contraction state is in at the sacculus, and the ability through the narrow pathological change section of blood vessel is bigger.

The technical solution is further explained below:

in one embodiment, the drive assembly comprises a helical coil and a resilient member;

when the spiral coil is electrified, the cutting knife is sucked, so that the elastic piece is in a compressed state;

when the spiral coil is powered off, the cutting knife is loosened, and the elastic piece drives the cutting knife to extend outwards along the radial direction of the outer tube.

Through setting up helical coil cooperation elastic component, produce the electromagnetic field when helical coil circular telegram, can hold the cutting knife, the elastic component has elastic potential energy, and when cutting sacculus expansion pipe transported, the cutting subassembly was in the state of contracting, avoided the damage of cutting knife to normal blood vessel this moment. When the cutting assembly is transported to the position of the lesion, the spiral coil is powered off, the electromagnetic field stops being generated, and the elastic piece elastically recovers to drive the cutting knife to pop out to cut the lesion of the blood vessel. After the cutting is finished, the cutting knife can be electrified again to retract, so that the subsequent movement of the cutting balloon dilatation catheter in the blood vessel is facilitated.

In one embodiment, the cutting knife comprises a plurality of blades, the blades are wound on the outer pipe to form an annular cutting knife, and the driving assembly is used for driving the blades to stretch. This cutting knife is through setting up the blade of a plurality of around locating the outer tube for the blade is all distributed to the circumference of outer tube, is convenient for to the all-round cutting of vascular pathological change department, and overall structure is simple reasonable, and cutting effect is good.

In one embodiment, the height of the blade is 0.5-5mm, and the length of the blade is 1-50mm.

In one embodiment, the blade is provided with a blade edge and a blade back, and a plurality of medicine collecting bins filled with medicines are formed in part or all of the blade edge.

In one embodiment, the shape of the medicine collecting bin is triangular, and the vertex angle of the triangle is arranged on one side of the knife edge close to the knife back.

In one embodiment, opposite ends of each blade are formed with guide bevels extending from ends of the back toward a middle of the cutting edge.

In one embodiment, the cutting balloon dilatation catheter further comprises a bag-shaped film, the bag-shaped film is of a structure with an opening at one end, and the opening of the bag-shaped film is connected to the outer tube and covers the blade. The blade is wrapped by the bag-shaped film, so that the damage risk to normal blood vessels in the transfer process is greatly reduced, the safety is improved, and the medicine in the medicine collecting bin can be prevented from being lost in the transfer process.

In one embodiment, the pouch-like film is provided with a plurality of cutting lines, at least one of which is arranged in the direction of the blade. The cutting line is arranged, so that the bag-shaped film can be easily cut when the driving assembly drives the cutting knife to extend, and the structure is simple and reasonable.

In one of them embodiment, cutting sacculus expansion pipe still includes the pipe seat, the pipe seat connect in the outer tube with the near-end of inner tube, the pipe seat includes wire chamber, sufficient chamber and electric joint, the wire chamber with the inner chamber intercommunication of inner tube for the guide wire that guides gets into the inner chamber of inner tube, sufficient chamber with the inner chamber of outer tube with the sacculus intercommunication for the inflation and the disappointing of sacculus, electric joint with drive assembly electricity is connected, is used for control drive assembly switches on or off the electricity. The catheter seat is arranged to facilitate the external control of the work of the cutting balloon dilatation catheter positioned in the blood vessel, and the guide wire cavity is arranged on the catheter seat to facilitate the external control of the guide wire in the blood vessel. Through set up the sufficient chamber that communicates with the inner chamber of outer tube on the pipe seat, be convenient for control aerifing and disappointing of sacculus in the external world, simple structure is reasonable, and it is convenient to use. Through set up the electricity and connect on the pipe seat, be convenient for at external control drive assembly, simple structure is reasonable, and it is convenient to use.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of an embodiment of a cutting balloon dilation catheter;

FIG. 2 is a partial schematic view of an embodiment of a cutting balloon dilation catheter;

FIG. 3 is a schematic view of a prior art cutting blade cutting a lesion;

FIG. 4 is a schematic view of a cutting blade cutting a lesion according to one embodiment;

FIG. 5 is a schematic view of a blade according to an embodiment;

FIG. 6 is a schematic view of a pouch film according to an embodiment;

FIG. 7 is a cross-sectional view of one embodiment of a cutting assembly shown retracted;

FIG. 8 is a cross-sectional view of an extended cutting assembly according to one embodiment.

Description of reference numerals: 10. cutting the balloon dilatation catheter; 100. a conduit member; 110. an outer tube; 120. an inner tube; 122. a tip outlet; 200. a balloon; 300. a cutting assembly; 310. a drive assembly; 312. a helical coil; 314. an elastic member; 320. a cutting knife; 322. a blade; 3222. a blade; 3224. a back of a knife; 3226. a medicine collecting bin; 3228. a guide slope; 400. a bag-like film; 410. cutting a line; 500. a marker ring; 600. a catheter hub; 610. a guidewire lumen; 620. filling the cavity; 630. an electrical connector; 700. a medicine is provided.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

The term "proximal" generally refers to the end of the respective member that is closer to the operator, and "distal" refers to the end of the respective member that is further from the operator.

Referring to fig. 1 and 2, an embodiment provides a cutting balloon dilatation catheter 10 comprising a catheter member 100, a balloon 200 and a cutting assembly 300, the catheter member 100 comprising an outer tube 110 and an inner tube 120, the inner tube 120 being threaded through the inner lumen of the outer tube 110; the balloon 200 is arranged around the inner tube 120 and connected with the distal end of the outer tube 110, the balloon 200 is communicated with the inner cavity of the outer tube 110, and the balloon 200 is used for dilating blood vessels; the cutting assembly 300 comprises a driving assembly 310 and a plurality of cutting knives 320, the driving assembly 310 is arranged on the outer tube 110, the plurality of cutting knives 320 are arranged in an array, and the driving assembly 310 is used for driving the cutting knives 320 to extend and retract.

Above-mentioned cutting sacculus expansion pipe 10 is when using, carry sacculus 200 to narrow pathological change department, and carry gas or liquid in to sacculus 200 through the inner chamber of outer tube 110, thereby make sacculus 200 be full of and expand the blood vessel, after the expansion is accomplished to the blood vessel, take out gas or liquid in the sacculus 200, make sacculus 200 lose the air, continue to promote cutting sacculus expansion pipe 10, carry outer tube 110 to pathological change department, cutting assembly 300 aims at the pathological change department of waiting to cut, through control drive assembly 310, drive cutting knife 320 stretches out cutting blood vessel pathological change department. The balloon 200 is arranged at the front end of the cutting balloon dilatation catheter 10 and is inflated and deflated, so that the blood vessel can be expanded in advance, the cutting assembly 300 is conveyed to a lesion part after the blood vessel is expanded, the capability of passing through a tortuous blood vessel is improved, and the risk of damage to a normal blood vessel by the cutting assembly 300 is reduced. In addition, the mode of cutting knife connection on the outer tube compares with the mode of cutting knife lug connection in prior art in the sacculus periphery, and it is less that the whole volume under the folding or contraction state is in at the sacculus, and the ability through the narrow pathological change section of blood vessel is bigger.

Because cutting knife 320 directly sets up on outer tube 110, after cutting knife 320 contracts, this device external diameter is little, and cutting knife 320 is small in addition, so this device is easy through narrow department, can the effectual cutting sacculus expansion pipe 10 that improves this embodiment and provide through the ability of circuitous blood vessel.

Referring to fig. 1 and 2, in some embodiments, the cutting blade 320 is made of a stainless steel material that can be magnetically conductive. The driving assembly 310 includes a helical coil 312 and an elastic member 314; when the spiral coil 312 is energized, the cutting knife 320 is attracted, so that the elastic element 314 is in a compressed state; when the helical coil 312 is de-energized, the cutting blade 320 is released and the resilient member 314 drives the cutting blade 320 to extend. Through setting up helical coil 312 and cooperating elastic component 314, produce the electromagnetic field when helical coil 312 circular telegram, can hold cutting knife 320, elastic component 314 has elastic potential energy, and when cutting sacculus expansion pipe 10 transported, cutting assembly 300 was in the state of retracting, avoided the damage of cutting knife 320 to normal blood vessel. When the cutting assembly 300 is transported to the lesion site, the spiral coil 312 is powered off, the electromagnetic field stops being generated, and the elastic member 314 elastically recovers to drive the cutting knife 320 to pop out to cut the vascular lesion. After the cutting is completed, the cutting knife 320 can be powered on again, so that the cutting balloon dilatation catheter 10 can be conveniently moved in the blood vessel.

Specifically, the helical coil 312 is disposed on the outer wall of the outer tube 110, so as to drive the cutting blade 320. The elastic member 314 is a spring.

Referring to fig. 1 and 2, in some embodiments, the cutting knife 320 includes a plurality of blades 322, the plurality of blades 322 are wound around the outer tube 110 to form the annular cutting knife 320, and the driving assembly 310 is configured to drive the plurality of blades 322 to extend and retract. This cutting knife 320 is through setting up a plurality of around the blade 322 of locating the outer tube 110 for the blade 322 that all distributes in circumference of outer tube 110 can cut calcification, plaque or the fibrosis region of different positions on the pathological change vascular wall, and overall structure is simple reasonable, and the cutting effect is good.

Preferably, the cutting knife 320 includes four blades 322, the four blades 322 are uniformly distributed along the circumferential direction of the outer tube 110, and the included angle between the centers of the adjacent blades 322 is 90 °. The cutting knives 320 are provided with four groups, and the four groups of cutting knives 320 are evenly arranged along the axial direction of the outer tube 110 at intervals. When cutting knife 320 stretches out to vascular pathological change department, set up the plaque on the laminating vascular pathological change department that can be better through multiunit cutting knife 320, improve the cutting effect.

It is understood that the cutting blade 320 may include other number of blades 322, such as 2, 3, 5, 6, 7, 8, 9, 10 blades 322, but not limited thereto.

It is understood that the number of groups of the cutting blade 320 may be other numbers, such as 2 groups, 3 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, and 10 groups, but not limited thereto.

Specifically, the plurality of blades 322 are spaced along the axial direction and the circumferential direction of the outer tube 110 to form an array arrangement, and the plurality of blades 322 may also be spaced along the oblique line.

In the prior art, a traditional cutting knife is a large blade, and when the cutting knife is used for cutting, as shown in fig. 3, the curvature of the traditional cutting knife cannot be changed along with the curvature of a curved surface of a lesion part in a self-adaptive manner, so that only part of the lesion part can be cut off, and a satisfactory effect cannot be achieved even if the cutting knife is cut off for multiple times. Arrange the setting through setting up a plurality of cutting knife 320 arrays in this application, as shown in fig. 4, because the crooked shape self-adaptation transform of pathological change department can be followed to the angle between a plurality of cutting knives 320, therefore, each cutting knife 320 can paste each crooked position in pathological change department, can laminate more when making the cutting pathological change, the cutting effect is better, reach good treatment, and can effectively avoid the excessive cutting to pathological change department, avoid perforating, complication's such as restenosis emergence, and can be applicable to bigger pathological change angle.

In a preferred embodiment, the material of the cutting blade 320 in this embodiment is an alloy, but the material of the cutting blade 320 in this embodiment may also be a material with high hardness, such as pure metal, plastic, ceramic, etc. in other embodiments.

Referring to fig. 5, in some embodiments, the height of the blade 322 in this embodiment ranges from 0.5 mm to 5mm, and the length of the cutting knife ranges from 1 mm to 50mm.

In a preferred embodiment, the number of blades 322 in this embodiment is determined based on the length of balloon 200.

In a preferred embodiment, the material of the balloon 200 in this embodiment is a semi-compliant or non-compliant material.

In a preferred embodiment, the material of the catheter member 100 in this embodiment is nylon, and in other embodiments, the material of the catheter member 100 in this embodiment may also be polyether block polyamide, a multi-layer braided tube, or a metal spiral-cut tube.

Referring to fig. 5, in some embodiments, the blade 322 has a blade 3222 and a blade back 3334, and some or all of the blade 3222 has a plurality of drug collecting cavities 3226 filled with drugs 700.

Referring to fig. 5, in some embodiments, the medicine collecting chamber 3226 is triangular in shape, and the apex angle of the triangle is disposed at the side of the blade 3222 close to the blade back 3224.

Referring to fig. 5, in some embodiments, opposite ends of each blade 322 are formed with guide ramps 3228, each extending from an end of the back 3224 toward a middle of the blade edge 3222.

Specifically, the medicine collecting bin 3226 is arranged on the blade edge, the blade 322 is exposed along with the expansion of the balloon 200 and contacts with the thrombus or the plaque, and the medicine collecting bin 3226 has the function of storing the medicine 700, so that the medicine 700 is released in the cutting process when the blade 322 reaches the thrombus or the plaque, the medicine 700 can accurately reach a pathological change part, the purpose of directional administration is achieved, the medicine 700 can be prevented from falling off to a blood vessel in the conveying process of the balloon 200 in a human body, side effects on the human body can be avoided, the medicine 700 can directly reach the pathological change part, and the using amount of the medicine 700 is reduced.

Referring to fig. 6 and 7, in some embodiments, the cutting balloon dilation catheter 10 further comprises a bag-shaped film 400, the bag-shaped film 400 has an open end, and the opening of the bag-shaped film 400 is connected to the outer tube 110 and covers the blade 322. The blade 322 is wrapped by the bag-shaped film 400, so that the risk of damage to normal blood vessels in the transfer process is greatly reduced, the safety is improved, and the medicine 700 in the medicine collecting bin 3226 can be prevented from losing in the transfer process.

Referring to fig. 6 and 8, in some embodiments, the pouch film 400 is provided with a plurality of cutting lines 410, at least one cutting line 410 being disposed in the direction of the blade 322. The cutting line 410 is arranged, so that the cutting knife 320 can be driven by the driving assembly 310 to extend out, the bag-shaped film 400 can be easily cut, and the structure is simple and reasonable.

Specifically, the plurality of cutting lines 410 intersect at a midpoint that is adapted to be disposed above the blade 322. Preferably, the cutting lines 410 are provided with four, and the four cutting lines 410 are intersected to form a shape of a Chinese character 'mi'.

Referring to fig. 1, in some embodiments, the cutting balloon dilation catheter 10 further comprises a plurality of marker rings 500, the plurality of marker rings 500 being disposed on either side of the cutting assembly 300 and the balloon 200, respectively, the marker rings 500 being used to position the cutting assembly 300 and the balloon 200 in a blood vessel. Through setting up a plurality of mark rings 500, can mark this cutting assembly 300 and the position of sacculus 200 under the effect of X ray to the position of cutting knife 320 for the pathological change department is judged to more accurate, improves treatment validity and accuracy.

Referring to fig. 1, in some embodiments, cutting balloon dilation catheter 10 further comprises a catheter hub 600, catheter hub 600 being attached to the proximal ends of outer tube 110 and inner tube 120, catheter hub 600 comprising a guidewire lumen 610, an inflation lumen 620, and an electrical connector 630, guidewire lumen 610 communicating with the lumen of inner tube 120 for guiding a guidewire into the lumen of inner tube 120. Be convenient for be located the work of endovascular cutting sacculus expansion pipe 10 at external control through setting up catheter holder 600, through set up wire guide chamber 610 on catheter holder 600, be convenient for guide wire at the motion of external control in the blood vessel, through set up the sufficient chamber 620 with the inner chamber intercommunication of outer tube 110 on catheter holder 600, be convenient for aerify and lose heart at external control sacculus 200, through set up electric joint 630 on catheter holder 600, be convenient for at external control drive assembly 310, and is simple and reasonable in structure, and convenient to use.

Specifically, the present application provides a method of using a cutting balloon dilation catheter 10 comprising the steps of:

the cutting balloon dilation catheter 10 is shown in fig. 1 in a pre-use state, all blades 322 are restrained by a tubular body (not shown), and the spring is in a compressed state;

after preoperative preparation is ready, the electric connector 630 is connected with the electromagnetic controller, the electromagnetic field is generated by the spiral coil 312, the blade 322 is sucked, the tip of the cutting balloon dilatation catheter 10 penetrates into the guide wire, and the guide wire penetrates out of the guide wire cavity 610 of the catheter base 600 along the lumen of the inner tube 120;

referring to fig. 1, whether the balloon 200 reaches the lesion site is determined by the marker ring 500 on the inner tube 120;

after reaching the designated position, the balloon 200 is inflated or liquid is filled through the filling cavity 620, so that the balloon 200 is expanded, the expanded balloon 200 can expand the diameter of the vascular lesion, the air is discharged and refilled, the process is repeated for several times, the diameter of the blood vessel is expanded, then the air is discharged, and the cutting balloon dilatation catheter 10 is pushed, so that the blade 322 is positioned at the lesion;

then, the power is cut off, the magnetic field disappears, the blade 322 moves towards the blood vessel wall because the blade 322 is not subjected to the magnetic field and is subjected to the elastic force of the elastic element 314, and at the moment, the blade 322 cuts the bag-shaped film 400 and cuts into the pathological change part of the blood vessel, as shown in fig. 2;

then electrify, the magnetic field produces, the blade 322 because of receiving the magnetic field, the elastic member 314 is compressed, the blade 322 moves to the centre of the guide tube, at this time the blade 322 is clung to the outer tube 110; then, the power is cut off, the power on-off step is repeated, and the lesion part is cut for multiple times;

after the cutting is finished, the power is switched on, the magnetic field is generated, the blade 322 is subjected to the magnetic field, the elastic element 314 is compressed, the blade 322 can be prevented from contacting the blood vessel by means of the guiding catheter, and then the cutting balloon dilatation catheter 10 is withdrawn, so that the operation is finished.

Specifically, the present application also provides another method of using the cutting balloon dilation catheter 10 with a drug 700 loaded on the blades 322, comprising the steps of:

the cutting balloon dilation catheter 10 body is shown in fig. 1 in a pre-use state, all blades 322 are restrained by a tubular body (not shown), and the elastic member 314 is in a compressed state;

after reaching the designated position, the balloon 200 is inflated by inflating the inflation cavity 620 or liquid, the inflated balloon 200 can expand the diameter of the vascular lesion, deflate and inflate again, repeat several times, so that the diameter of the blood vessel is expanded, then deflate, push the cutting balloon dilatation catheter 10, and enable the blades 322 to be positioned at the lesion;

then, the power is cut off, the magnetic field disappears, the blade 322 moves towards the blood vessel wall because the blade 322 is not subjected to the magnetic field and is subjected to the elastic force of the elastic part 314, at this time, the blade 322 cuts the bag-shaped membrane 400 and cuts into the pathological change part of the blood vessel, and meanwhile, the medicine 700 on the medicine collecting bin 3226 is released to the pathological change part to play a therapeutic role, referring to fig. 2;

then electrifying, generating a magnetic field, compressing the elastic element 314 when the blade 322 is subjected to the magnetic field, moving the blade 322 to the center of the catheter, and enabling the blade 322 to cling to the catheter; then powering off, repeating the steps, and cutting the lesion for multiple times;

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A cutting balloon dilation catheter, comprising:

the catheter component (100), the catheter component (100) comprises an outer tube (110) and an inner tube (120), and the inner tube (120) penetrates through the inner cavity of the outer tube (110);

a balloon (200), wherein the balloon (200) is arranged on the inner tube (120) in a surrounding way and is connected with the distal end of the outer tube (110), the balloon (200) is communicated with the inner cavity of the outer tube (110), and the balloon (200) is used for expanding blood vessels; and

the cutting assembly (300) comprises a driving assembly (310) and a plurality of cutting knives (320), the driving assembly (300) is arranged on the outer pipe (110), the plurality of cutting knives (320) are arranged in an array mode, and the driving assembly (310) is used for driving the cutting knives (320) to stretch and retract.

2. The cutting balloon dilation catheter according to claim 1, wherein the drive assembly (310) comprises a helical coil (312) and a resilient member (314);

when the spiral coil (312) is electrified, the cutting knife (320) is sucked, so that the elastic piece (314) is in a compressed state;

when the spiral coil (312) is powered off, the cutting knife (320) is loosened, and the elastic piece (314) drives the cutting knife (320) to extend outwards along the radial direction of the outer pipe (110).

3. The cutting balloon dilation catheter according to claim 1, wherein the cutting knife (320) comprises a plurality of blades (322), the plurality of blades (322) are wound around the outer tube (110) to form a circular cutting knife (320), and the driving assembly (310) is used for driving the plurality of blades (322) to extend and retract.

4. The cutting balloon dilation catheter according to claim 3, wherein the height of the blades (322) is 0.5-5mm and the length of the blades (322) is 1-50mm.

5. The cutting balloon dilatation catheter according to claim 3 wherein the blade (322) has a blade and a blade back, and some or all of the blade is equipped with a plurality of drug collection chambers (3226) which can be filled with drugs (700).

6. The cutting balloon dilatation catheter of claim 5 wherein the drug collection bin is triangular in shape and the apex angle of the triangle is located on the side of the blade near the blade back.

7. The cutting balloon dilation catheter according to claim 5, wherein opposing ends of each of the blades (322) are formed with guide ramps, the guide ramps each extending from an end of the blade back toward a middle of the blade edge.

8. The cutting balloon dilatation catheter according to claim 5 further comprising a bag-like membrane (400), wherein the bag-like membrane (400) is of an open-ended structure, and the opening of the bag-like membrane (400) is connected to the outer tube (110) and covers the blade (322).

9. The cutting balloon dilation catheter according to claim 8, wherein the pocket membrane (400) is provided with a number of cutting lines (410), at least one cutting line (410) being arranged in the direction of the blade (322).

10. The cutting balloon dilation catheter according to any one of claims 1-9 further comprising a catheter hub (600), the catheter hub (600) connected to the proximal ends of the outer tube (110) and the inner tube (120), the catheter hub (600) comprising a guidewire lumen (610), a filling lumen (620) and an electrical connector (630), the guidewire lumen (610) communicating with the lumen of the inner tube (120) for guiding a guidewire into the lumen of the inner tube (120), the filling lumen (620) communicating with the lumen of the outer tube (110) and the balloon (200) for inflation and deflation of the balloon (200), the electrical connector (630) electrically connected to the drive assembly (310) for controlling the powering on and off of the drive assembly (310).