CN115414576A

CN115414576A - Balloon catheter structure

Info

Publication number: CN115414576A
Application number: CN202210994551.9A
Authority: CN
Inventors: 周友明; 刘朝生; 郭新宇; 韦政军; 肖金金; 张志旋; 李琴芳; 林浩
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: 2022-12-02
Anticipated expiration: 2042-08-18
Also published as: CN115414576B

Abstract

The application belongs to the technical field of medical instruments and provides a balloon catheter structure which comprises a balloon catheter, a first sleeve, a second sleeve and a third sleeve; the balloon catheter extends in a tubular shape and is provided with a catheter part and a balloon part connected with the catheter part; the third sleeve is inserted in the balloon catheter; the first sleeve is at least sleeved outside the balloon part; a first opening hole is formed in the position, opposite to the balloon part, of the first sleeve; the second sleeve is sleeved outside the first sleeve and rotates around the central axis of the first sleeve; a second open hole is formed in the position, opposite to the balloon part, of the second sleeve; the second sleeve is rotationally switched between a first position and a second position through rotation; when the second sleeve is in the first position, the first opening hole is communicated with the second opening hole oppositely; when the first opening hole is at the first position, the first opening hole is staggered with the second opening hole. The application aims to solve the technical problem that in the prior art, the medicine is seriously lost in the conveying process of the medicine-carrying saccule part.

Description

Balloon catheter structure

Technical Field

The application belongs to the technical field of medical instrument, especially, relate to a sacculus catheter structure.

Background

The drug-coated balloon catheter (balloon catheter for short) is a balloon catheter loaded with a drug coating on the surface of a common naked balloon, after the balloon loaded with the drug is conveyed to a diseased region, the balloon is expanded to restore the blood vessel wall of the diseased region, and meanwhile, the drug coating is eluted from the surface of the balloon and released to the blood vessel wall, so that the hyperplasia of smooth muscle cells can be further inhibited, and the restenosis of the blood vessel can be prevented. Therefore, the drug-coated balloon catheter can not only establish a channel for blood circulation through balloon expansion, but also avoid defects of in-stent restenosis, thrombus and the like after stent implantation.

The drug-coated balloon catheter in the prior art generally uses a balloon catheter with a balloon part, a drug coating is applied to the outer surface of the balloon part, and then the drug-coated balloon is conveyed to a diseased region and then expanded according to the characteristics of the diseased region. However, in the process of conveying the drug-coated balloon catheter in the blood vessel, the drug loss rate is up to more than 50 percent due to the flushing of high-speed flowing blood, so that the drug amount releasable at a lesion part of the drug-coated balloon is reduced, and the effectiveness of the device is influenced; meanwhile, after the medicine flushed by blood falls off, the far-end blood vessel can be blocked, the metabolic burden of the body is increased, and the safety of the instrument is reduced.

Disclosure of Invention

The utility model aims at providing a sacculus pipe structure aims at solving among the prior art medicine loss serious and then reduce the sacculus portion and can release the technical problem of dose at pathological change position in the process of carrying of the sacculus portion of medicine carrying.

An object of the present application is to provide a balloon catheter structure, comprising:

a balloon catheter extending in a tubular shape, the balloon catheter having a catheter portion and a balloon portion connected to the catheter portion;

the first sleeve is at least sleeved outside the balloon part; a first opening hole is formed in the position, opposite to the balloon part, of the first sleeve;

the second sleeve is sleeved outside the first sleeve and can rotate around the central axis of the first sleeve relative to the first sleeve; a second opening hole is formed in the position, opposite to the balloon part, of the second sleeve; the second sleeve can be rotationally switched between a first position and a second position through rotation; and

the third sleeve is inserted into the accommodating cavity of the balloon catheter;

wherein the first open bore is in opposing communication with the second open bore when the second sleeve is in the first position; the first open hole is offset from the second open hole when the second sleeve is in the second position.

Furthermore, a plurality of first open holes are formed in the first sleeve, and the first open holes are arranged around the central axis of the first sleeve at intervals; one second open hole is provided, and the second open hole can be in opposite communication with each of the first open holes.

Furthermore, the number of the second open holes is the same as that of the first open holes, and the second open holes and the first open holes are arranged in a one-to-one correspondence manner, so that in the first position, each second open hole is relatively communicated with the corresponding first open hole, and in the second position, each second open hole and the corresponding first open hole can be staggered and avoided.

Further, the light-emitting structure is connected to the third sleeve, the light-emitting structure is disposed close to the balloon portion, and the light-emitting structure can be disposed opposite to the first open hole, so that light emitted by the light-emitting structure can irradiate a balloon wall of the balloon portion corresponding to the first open hole; the outer side of the capsule wall of the sacculus part is coated with a medicine coating containing a photosensitizer.

Further, the LED lamp also comprises a control structure, wherein the control structure is in communication connection with the light-emitting structure and is used for controlling the light-emitting intensity and the light-emitting time of the light-emitting structure.

Furthermore, the balloon wall of the balloon portion is provided with protruding structures extending away from the center of the balloon portion, the number of the protruding structures is the same as that of the first opening holes, and when the balloon portion is expanded, the protruding structures can be correspondingly inserted into the first opening holes.

Further, the third sleeve comprises a first layer structure and a second layer structure sleeved and connected outside the first layer structure, and the first layer structure is an annular plate-shaped part made of polytetrafluoroethylene; the second layer structure comprises a first connecting section and a second connecting section connected with one end of the first connecting section, the first connecting section is located at the near end and is of a braided wire structure or a braided wire and spring winding structure, and the second connecting section is of a spring winding structure.

Further, still include fixed handle and with fixed handle rotates the twist grip who is connected, fixed handle with the balloon catheter with the near-end fixed connection of third sleeve pipe, twist grip with second sleeve pipe fixed connection.

Further, the first sleeve extends from the balloon portion to the proximal end of the balloon catheter and is fixedly connected with the fixed handle.

Furthermore, the near end of the balloon catheter is connected with a pressurizing interface communicated with the accommodating cavity, and the pressurizing interface is used for injecting gas into the accommodating cavity; the near end of the balloon catheter is also connected with an electric connection port communicated with the accommodating cavity, and the electric connection port is used for inserting a conductive component; the near end of the balloon catheter is further connected with a guide wire interface communicated with the accommodating cavity, and the guide wire interface is used for inserting a guide wire into the accommodating cavity.

Compared with the prior art, the balloon catheter structure provided by the application has the beneficial effects that: compared with the prior art, in the conveying process of the balloon catheter structure, the first open hole and the second open hole are staggered and avoided, and the second sleeve has a protection effect on the drug coating on the surface of the balloon part, so that the washing of blood flow to the drug coating in the conveying process can be reduced or avoided, the drug loss rate in the conveying process is effectively reduced, the effectiveness of the balloon catheter structure is improved, and meanwhile, the situation that dropped drugs are washed to far-end blood vessels by blood to block the blood vessels can be reduced or avoided; after reaching the lesion site, the rotatable second sleeve is rotated to a first position around the central axis, and the balloon part extends out of the first open hole and the second open hole and is exposed in the environment of the blood vessel so as to apply medicine to the lesion site on the inner wall of the blood vessel; when taking out from sacculus pipe structure, the second sleeve pipe rotates to the second position to reduce the friction of sacculus portion and vascular wall, play the effect of protection to the vascular wall.

Drawings

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

Fig. 1 is a schematic perspective view of a balloon catheter structure according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of the first bushing of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 isbase:Sub>A view A-A of FIG. 3;

fig. 5 is a schematic structural diagram of a balloon portion in a balloon catheter structure according to an embodiment of the present disclosure;

FIG. 6 is a cross-sectional outer profile configuration of the balloon portion of FIG. 5;

FIG. 7 is a cross-sectional view of another balloon catheter configuration provided in accordance with an embodiment of the present application at a balloon site;

FIG. 8 is a schematic structural diagram of a balloon catheter structure according to another embodiment of the present application;

fig. 9 is a schematic cross-sectional view of fig. 8.

Description of the reference numerals: 1. a second sleeve; 11. a second open hole; 2. a first sleeve; 21. a first open hole; 3. a balloon catheter; 31. an accommodating cavity; 32. a balloon portion; 321. a raised structure; 322. a groove structure; 33. a conduit portion; 34. an electrical connection port; 35. a pressurizing interface; 36. a guidewire interface; 4. a third sleeve; 41. weaving silk; 5. a light emitting structure; 6. rotating the handle; 7. fixing a handle; 8. a guidewire.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "upward," "vertical," "horizontal," "bottom," "inner," "outer," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience in describing the present application and simplifying the 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 considered as limiting the present application.

Furthermore, the terms "first", "second", etc. 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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1-3, an embodiment of the present application provides a balloon catheter structure, including a balloon catheter 3, a first sleeve 2, a second sleeve 1, and a third sleeve 4; the balloon catheter 3 extends in a tubular shape and has an accommodating chamber 31 formed therein, the balloon catheter 3 has a catheter portion 33 and a balloon portion 32 connected to the catheter portion 33, and the balloon portion 32 can be inflated and deformed to increase its volume; the third sleeve 4 is inserted into the accommodating cavity 31 of the balloon catheter 3.

The first sleeve 2 is at least sleeved outside the balloon portion 32, so that the balloon portion 32 can be contained in the first sleeve 2 before expansion; a first opening hole 21 is formed in the position, opposite to the balloon portion 32, of the first sleeve 2, and the first opening hole 21 can be aligned with the balloon portion 32; the second sleeve 1 is sleeved outside the first sleeve 2 and can rotate around the central axis of the first sleeve 2 relative to the first sleeve 2; a second opening hole 11 is formed in the position, opposite to the balloon portion 32, of the second sleeve 1, and the second opening hole 11 is opposite to the balloon portion 32; the second sleeve 1 can be rotationally switched between a first position and a second position relative to the first sleeve 2 by rotation; when the second casing 1 is at the first position, the first opening hole 21 and the second opening hole 11 are arranged in opposite communication, so that the balloon portion 32 is expanded outwards and can protrude out of the first casing 2 through the first opening hole 21 and the second opening hole 11; when the second casing 1 is in the second position, the first opening hole 21 and the second opening hole 11 are arranged in a staggered and avoiding manner.

Specifically, the balloon catheter 3 includes a catheter portion 33 and a balloon portion 32 connected to the distal end of the catheter portion 33, the balloon portion 32 includes a working section located at the middle and two transition sections connected to both ends of the working section, the working section is substantially cylindrical, the transition sections are tapered, the transition sections extend in a tapered manner from one end connected to the working section to a direction away from the working section, and the transition sections at one end are connected to the catheter portion 33.

The outer surface of the balloon wall of the balloon portion 32 (or the outer surface of the balloon portion 32) is coated with a drug coating, the drug coating contains an active drug for treating a lesion, and the coating process of the active drug is the existing process and is not described herein again. The cylindrical working section of the balloon portion 32 can ensure that the inflated balloon portion 32 has good adherence, and can effectively transfer the active drug to the inner wall of the blood vessel of the lesion site.

The holding chamber 31 is seted up to the inside of sacculus pipe 3, and holding chamber 31 is called the seal wire chamber again, and the main seal wire 8 that is used for wearing to establish in the holding chamber 31, during the use, seal wire 8 can wear to establish in the seal wire chamber to follow sacculus pipe structure and advance to vascular pathological change department together.

The third sleeve 4 extends in the same direction as the balloon catheter 3, the distal end of the third sleeve 4 can be fixedly connected with the distal end of the balloon catheter 3, and the distal end part of the accommodating cavity at the position of the balloon part 32 is closed, so that the balloon part 32 can be inflated; the proximal end of the third cannula 4 can communicate with a guidewire port 36 (described below); the third cavity has been seted up to the inside of third sleeve 4, and the both ends and the external world intercommunication of third cavity, third cavity are used for holding seal wire 8 (or seal wire apparatus), and seal wire 8 can peg graft in the third cavity of third sleeve 4 for play the effect of support to whole sacculus pipe structure, during the use, seal wire 8 follows sacculus pipe structure and impels to vascular pathological change position together.

The first sleeve 2 can be tubular or barrel-shaped, a first cavity is formed in the middle of the first sleeve 2, a tube body of the first sleeve 2 can be at least sleeved outside the balloon portion 32 to shield the outside of the balloon portion 32, the balloon portion 32 can be contained in the first sleeve 2 before expansion, and the central axis of the first sleeve 2 is approximately parallel to or approximately coincident with the central axis of the balloon catheter 3; at least one first opening hole 21 is formed in the tube wall of the first sleeve 2, and the first opening hole 21 can be arranged opposite to the outer bag wall of the balloon portion 32, so that the balloon portion 32 can protrude outwards through the first opening hole 21 when being expanded.

To the structure of first sleeve pipe 2, can also design to extend the tubular structure that sets up for the whole extension length along sacculus pipe 3, sacculus portion 32 not only can be located to the cover by first sleeve pipe 2, can also locate pipe portion 33 by the cover, and the outside of sacculus pipe 3 is located to the outside that the distal end of first sleeve pipe 2 extended to the near-end always, whole cover.

The second sleeve 1 is tubulose or barrel-shaped, and the middle part of second sleeve 1 is formed with the second cavity to make sacculus pipe 3 can peg graft in the first cavity, and the outside of first sleeve 2 is located to second sleeve 1 cover, and the axis of second sleeve 1 is roughly parallel with the axis of first sleeve 2 or sacculus pipe 3 or roughly the coincidence sets up. The tube wall of the second sleeve 1 is provided with at least one second opening hole 11, the second opening hole 11 faces the balloon portion 32, and the second opening hole 11 can also face the first opening hole 21, when the second opening hole 11 faces the first opening hole 21, the balloon portion 32 can protrude outwards through the first opening hole 21 and the second opening hole 11 when expanding.

The second sleeve 1 can rotate around the central axis of the first sleeve 2 relative to the first sleeve 2, so that the second sleeve 1 can be switched between a first position and a second position through rotation, wherein in the first position, the first opening hole 21 and the second opening hole 11 are staggered and are not communicated with each other, so that the tube wall of the second sleeve 1 can shield the balloon portion 32 at the position of the first opening hole 21; in the second position, the first opening hole 21 and the second opening hole 11 can be in communication opposition, so that the balloon portion 32 can be outwardly protruded through the first opening hole 21 and the second opening hole 11 in this order when expanded.

The second sleeve 1 adopts a structure that reinforcing ribs are additionally arranged inside, the number of the reinforcing ribs is multiple, the length size of each reinforcing rib is 0.02mm-10mm, and the propelling performance and the control performance of the second sleeve 1 are improved.

The using method of the balloon catheter structure comprises the steps that before the balloon catheter structure is conveyed, the balloon part 32 is coated with a medicine coating, the balloon part 32 is in a folded state, the second sleeve 1 is in the second position by rotating the second sleeve 1, the tube wall of the second sleeve 1 can shield the first open hole 21, and then the balloon part 32 is shielded, so that the balloon part 32 is not exposed; the balloon catheter structure keeps the state and is conveyed to a lesion part, after the lesion part is reached, the second sleeve 1 is rotated to enable the second sleeve 1 to be located at the first position, the balloon portion 32 is expanded, the balloon portion 32, the first sleeve 2 and the second sleeve 1 are propped open together, then the position, opposite to the first open hole 21, of the balloon portion 32 is outwards protruded through the first open hole 21 and the second open hole 11, and a medicine coating on the outer balloon wall surface of the balloon portion 32 can be coated on the lesion part on the blood vessel wall so as to achieve the purposes of coating medicines on the lesion part and treating the lesion part; after the coating is finished, the second sleeve 1 is rotated to be in the first position, the tube wall of the second sleeve 1 covers the first open hole 21, the balloon portion 32 is further covered, the balloon portion 32 is contracted, and the whole balloon catheter structure is pulled out of the blood vessel.

In the embodiment, in the conveying process of the balloon catheter structure, the first opening hole 21 and the second opening hole 11 are dislocated and avoided, and the second sleeve 1 has a protection effect on the drug coating on the surface of the balloon portion 32, so that the washing of blood flow to the drug coating in the conveying process can be reduced or avoided, the drug loss rate in the conveying process is effectively reduced, the utilization rate of the drug is increased, the loss of the drug in blood circulation is reduced, the release efficiency of the drug is improved, the effectiveness of the balloon catheter structure is improved, meanwhile, the phenomenon that the dropped drug is washed to a far-end blood vessel by blood and blocks the blood vessel can be reduced or avoided, and the trafficability of the balloon catheter structure is improved; after reaching the lesion site, the rotatable second sleeve 1 is rotated to the first position around the central axis, and the balloon portion 32 is extended out of the first opening hole 21 and the second opening hole 11 and exposed in the blood vessel environment, so as to apply the medication to the lesion site on the inner wall of the blood vessel; when taking out from sacculus pipe structure, second sleeve 1 rotates to the second place to reduce the friction of sacculus portion 32 and vascular wall, play the effect of protection to the vascular wall.

In addition, the balloon catheter structure can reduce the drug loss rate, also can reduce the initial drug loading on the surface of the balloon part 32, lightens the metabolic burden of the organism and improves the safety of the balloon catheter structure.

Referring to fig. 1 and 2, in one embodiment, the first opening hole 21 is provided in a plurality, and the plurality of first opening holes 21 are spaced around the central axis of the first sleeve 2; one of the second opening holes 11 is provided, and the second opening hole 11 can be in opposite communication with each of the first opening holes 21.

In the present embodiment, after the balloon portion 32 reaches the lesion, the second sleeve 1 is rotated for a plurality of times, so that the second opening hole 11 can be sequentially and respectively communicated with the first opening hole 21, and thus, different parts of the balloon portion 32 coated with the drug can be sequentially attached to different parts of the lesion, so that the drug can be sequentially applied to the lesion coated on each part of the lesion or each part of the blood vessel, and the pertinence is higher; or, the balloon catheter 3 can be integrally rotated in the process of rotating the second sleeve 1, so that the first opening hole 21 and the second opening hole 11 are always aligned to a lesion part, and repeated drug application is performed to achieve a preset drug dosage, so that the use is more convenient and rapid, and the pertinence is strong.

Referring to fig. 1 and 2, in an embodiment, the number of the second opening holes 11 is the same as that of the first opening holes 21, and the second opening holes 11 and the first opening holes 21 are arranged in a one-to-one correspondence, so that in the first position, each second opening hole 11 is in relative communication with the corresponding first opening hole 21, and in the second position, each second opening hole 11 and the corresponding first opening hole 21 are dislocated and avoided.

In the present embodiment, the first opening holes 21 and the second opening holes 11 are arranged in a group, one first opening hole 21 corresponds to one second opening hole 11, when the second sleeve 1 is at the second position, each second opening hole 11 is not connected with each first opening hole 21, so that the tube wall of the second sleeve 1 can shield the first opening hole 21 to protect the balloon portion 32; when the second cannula 1 rotates to the first position, each second opening hole 11 is in one-to-one correspondence communication with the corresponding first opening hole 21, so that the balloon portion 32 located at each second opening hole 11 and the first opening hole 21 can apply medicine to the lesion position, the medicine application area is increased, and the medicine application amount is ensured.

Referring to fig. 5-7, in an embodiment, the balloon wall of the balloon portion 32 has a convex structure 321 extending away from the center of the balloon portion 32, the drug coating layer is mainly protruded on the outer surface of the convex structure 321, the number of the convex structures 321 is the same as that of the first open holes 21, and when the balloon portion 32 expands, the convex structures 321 can be correspondingly inserted into the first open holes 21 and protruded outside the first open holes 21 to contact with the lesion site.

Specifically, referring to fig. 5, the protruding structures 321 are mainly located in the working segment of the balloon portion 32, the protruding structures 321 extend along the outer balloon wall of the working segment, and the extending length of the protruding structures 321 is less than or equal to the length of the first opening hole 21, so that the protruding structures 321 can penetrate through the first opening hole 21, when there are a plurality of first opening holes 21, the plurality of protruding structures 321 are arranged around the central axis of the balloon portion at intervals, the protruding structures 321 correspond to the first opening holes 21 one to one, and after the balloon portion 32 is expanded, the groove structures 322 are formed between adjacent protruding structures 321.

In the present embodiment, as shown in fig. 7, the outer balloon wall of the balloon portion 32 forms a convex structure 321 corresponding to the first opening hole 21, so that when the balloon portion 32 is expanded, the convex structure 321 coated with the drug coating can more rapidly protrude out of the balloon portion 32 through the first opening hole 21 and the second opening hole 11, and the contact between the convex structure 321 and the lesion site is better achieved.

Referring to fig. 3 and 8, in an embodiment, the balloon catheter structure further includes a light-emitting structure 5 connected to the third sleeve 4, the light-emitting structure 5 is disposed in the accommodating cavity 31 of the balloon catheter 3 and is disposed near the balloon portion 32, and the light-emitting structure 5 can be disposed opposite to the first opening hole 21, so that light emitted from the light-emitting structure 5 can irradiate a balloon wall of the balloon portion 32 corresponding to the first opening hole 21; the outer side of the wall of the balloon portion 32 is coated with a drug coating containing a photosensitizer.

Specifically, the light-emitting structure 5 may be independently located in the accommodating cavity 31, or be connected and fixed to the inner side surface of the balloon wall of the balloon portion 32, light emitted by the light-emitting structure 5 can irradiate on the balloon wall of the balloon portion 32 opposite to the first opening hole 21, or the light-emitting structure 5 is connected to the distal end of the third sleeve 4, and the light-emitting structure 5 may be sleeved on the outer wall surface of the tube wall of the third sleeve 4; the light emitting structure 5 may include 1-10 light emitting lamp bodies.

In this embodiment, the drug coating applied to the outer side surface of the balloon wall of the balloon portion 32 is a drug coating containing a photosensitizer, the drug coating wraps the drug through a photosensitizer compound, and then emits light through the light-emitting structure 5 after reaching a diseased site to perform illumination, and the photosensitizer phospholipid compound or the combined drug of the carrier with the photosensitizer is cured by illumination, so that the drug can be adhered to the diseased site after being cured, thereby reducing the erosion loss of the drug in the blood flow process of the blood vessel and improving the release efficiency of the drug.

In one embodiment, the balloon catheter structure further comprises a control structure, which is in communication connection with the light emitting structure 5 for controlling the light emitting intensity and the light emitting time of the light emitting structure 5; the control structure can control the light-emitting structure 5 to emit light when the balloon reaches a diseased part, and when the medicine is coated on the diseased part, the control structure controls the light-emitting structure 5 to be closed.

Specifically, the control structure may be disposed outside the balloon catheter 3, the control structure may be connected to the light emitting structure 5 in a wired or wireless manner, and when the wired connection manner is adopted, the guide wire may be disposed in the accommodating cavity 31 of the balloon catheter 3.

In this embodiment, the control structure is arranged to control the light-emitting intensity and the light-emitting time of the light-emitting structure 5, so that the light-emitting structure 5 can sufficiently irradiate the drug coating containing the photosensitizer, thereby ensuring sufficient curing of the drug coating at the lesion site and further ensuring the drug effect.

Referring to fig. 3 and 8, in one embodiment, the third sleeve 4 includes a first layer structure and a second layer structure sleeved outside the first layer structure, wherein the first layer structure is an annular plate-shaped member made of Polytetrafluoroethylene (PTFE); the second layer structure comprises a first connecting section and a second connecting section connected with one end of the first connecting section, the first connecting section is located at the near end and is of a braided wire structure or a braided wire 41 and spring winding structure, the braided wire 41 is made of stainless steel, the second connecting section is of a spring winding structure, and the spring is made of stainless steel or nickel titanium and the like.

In the present embodiment, the first connecting section of the second layer structure is a braided wire structure or a braided wire 41 and spring wound structure, which can enhance the pushing performance and the handling performance of the balloon catheter 3, and the second connecting section is a spring wound structure, which can enhance the flexibility of the balloon catheter 3.

In one embodiment, referring to fig. 8 and 9, the balloon catheter structure further comprises a fixed handle 7 and a rotating handle 6 rotatably connected with the fixed handle 7, the fixed handle 7 is fixedly connected with the proximal end of the balloon catheter 3, and the rotating handle 6 is fixedly connected with the second sleeve 1.

Specifically, fixed handle 7 is located the near-end of sacculus pipe 3 to with the near-end fixed connection of sacculus pipe 3, when first sleeve 2 adopted whole cover to locate the structural style of sacculus pipe 3, first sleeve 2 extends to the near-end of pipe portion 33 by sacculus portion 32, and with fixed handle 7 fixed connection, the distal end of third sleeve 4 also can with fixed handle 7 fixed connection, make fixed handle 7 and sacculus pipe 3, first sleeve 2 and third sleeve 4 form wholly, can rotate with twist grip 6 and with twist grip 6 fixed connection's second sleeve 1 relatively.

In the embodiment, the fixed handle 7 and the rotating handle 6 are arranged at the far end of the balloon catheter 3, so that the second sleeve 1 can rotate relative to the first sleeve 2 more conveniently and easily.

Referring to fig. 8 and 9, in an embodiment, a pressure charging port 35 connected to the proximal end of the balloon catheter 3 is connected to the accommodating cavity 31 of the balloon catheter 3, and the pressure charging port 35 is used for charging a medium (gas) into the accommodating cavity 31 to charge the balloon portion 32, so that the balloon portion 32 expands or releases pressure outwards; the proximal end of the balloon catheter 3 is further connected with an electric connection port 34 communicated with the accommodating cavity 31, the electric connection port 34 is used for inserting an electric conductive component so that the electric conductive component is electrically connected with the light-emitting structure 5, and in the structure with the third sleeve 4, the electric connection port 34 is connected with the proximal end of the third sleeve 4; the proximal end of the balloon catheter 3 is further connected with a guide wire interface 36 communicated with the accommodating cavity 31, the guide wire interface 36 is used for inserting the guide wire 8 into the accommodating cavity 31, in the structure with the third sleeve 4, the guide wire interface 36 is communicated with the proximal end of the third sleeve 4, so that the guide wire 8 is inserted into the third sleeve 4 through the guide wire interface 36 and can penetrate out from the distal end of the third sleeve 4, and the guide wire interface 36 can also be connected to the fixed handle 7.

The foregoing is considered as illustrative only of the preferred embodiments of the invention and is presented only in the detailed description of the principles of the invention. Any modifications, equivalents, and improvements made within the spirit and principles of the present application and other embodiments of the present application that one skilled in the art may recognize without inventive faculty are intended to be included within the scope of the present application.

Claims

1. A balloon catheter structure, comprising:

the second sleeve is sleeved outside the first sleeve and can rotate around the central axis of the first sleeve relative to the first sleeve; a second open hole is formed in the position, opposite to the balloon part, of the second sleeve; the second sleeve is capable of being rotationally switched between a first position and a second position by rotation; and

2. The balloon catheter structure of claim 1, wherein the first open hole is provided in a plurality, the plurality of first open holes being spaced around the central axis of the first sleeve; one second open hole is provided, and the second open hole can be communicated with each first open hole oppositely.

3. The balloon catheter structure according to claim 1, wherein the number of the second opening holes is the same as the number of the first opening holes, and the second opening holes are arranged in a one-to-one correspondence with the first opening holes, so that in the first position, each of the second opening holes is in relative communication with the corresponding first opening hole, and in the second position, each of the second opening holes is offset from the corresponding first opening hole to avoid displacement.

4. A balloon catheter structure according to any one of claims 1-3, further comprising a light emitting structure connected to the third sleeve, the light emitting structure being disposed adjacent to the balloon portion and being positionable opposite the first open aperture such that light emitted by the light emitting structure is capable of impinging on a balloon wall of the balloon portion corresponding to the first open aperture; the outer side of the capsule wall of the sacculus part is coated with a medicine coating containing a photosensitizer.

5. A balloon catheter structure according to claim 4 further comprising a control structure in communication with the light emitting structure for controlling the intensity and duration of light emitted by the light emitting structure.

6. A balloon catheter structure according to any one of claims 1-3, wherein the balloon portion has a convex structure on the wall thereof extending away from the center of the balloon portion, the number of the convex structures is the same as the number of the first opening holes, and the convex structures can be correspondingly inserted into the first opening holes when the balloon portion is expanded.

7. A balloon catheter structure according to any one of claims 1-3, wherein the third sleeve comprises a first layer structure and a second layer structure sleeved outside the first layer structure, the first layer structure being an annular plate-like member made of teflon; the second layer structure comprises a first connecting section and a second connecting section connected with one end of the first connecting section, the first connecting section is located at the near end and is of a braided wire structure or a braided wire and spring winding structure, and the second connecting section is of a spring winding structure.

8. A balloon catheter structure according to any one of claims 1-3 further comprising a stationary handle fixedly attached to the proximal ends of the balloon catheter and the third sleeve, and a rotatable handle rotatably attached to the stationary handle fixedly attached to the second sleeve.

9. A balloon catheter structure according to claim 8, wherein the first sleeve extends from the balloon portion to a proximal end of the balloon catheter and is fixedly connected to the stationary handle.

10. The balloon catheter structure according to claim 9, wherein a pressurizing interface communicated with the accommodating cavity of the balloon catheter is connected to the proximal end of the balloon catheter, and the pressurizing interface is used for injecting gas into the accommodating cavity; the near end of the balloon catheter is also connected with an electric connection port communicated with the accommodating cavity, and the electric connection port is used for inserting a conductive component; the near end of the balloon catheter is also connected with a guide wire interface communicated with the accommodating cavity, and the guide wire interface is used for inserting a guide wire into the accommodating cavity.