CN115282443A

CN115282443A - Balloon dilatation catheter carrying medicine

Info

Publication number: CN115282443A
Application number: CN202211066164.5A
Authority: CN
Inventors: 黄佩佩; 李振业; 方晟东; 涂真金
Original assignee: Shenzhen Shunmei Medical Co ltd; Huizhou Shunmei Medical Technology Co ltd
Current assignee: Shenzhen Shunmei Medical Co ltd; Huizhou Shunmei Medical Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-11-04

Abstract

The invention relates to the technical field of medical instruments, in particular to a balloon dilatation catheter carrying medicines, which comprises an outer catheter, a balloon, a catheter handle and a catheter core, wherein one end of the outer catheter is connected with a corrugated pipe, and one end of the corrugated pipe is connected with the balloon; the end sleeve is arranged at the other end of the outer side of the outer guide pipe; the inflatable balloon comprises an inflatable tube, wherein a sealing partition plate is fixed at one end of the outer side of the inflatable tube, the sealing partition plate is fixed at one end of the inner side of the balloon, and an inflatable insertion tube extending to the outside of the end sleeve is inserted and fixed at the position, located at the other end, of one side of the inflatable tube. According to the invention, the angle of the saccule can be flexibly adjusted through the saccule angle adjusting mechanism, and in a bent air passage, the angle of the saccule can be changed along with the bending angle of the air passage, so that the saccule can move in the air passage smoothly, and the saccule is prevented from being bent or clamped in the air passage, and the treatment operation difficulty is increased.

Description

Balloon dilatation catheter carrying medicine

Technical Field

The invention relates to the technical field of medical instruments, in particular to a balloon dilatation catheter carrying medicines.

Background

The balloon catheter is understood to include a catheter and a balloon provided on the catheter, and further, a medium may be introduced into the balloon through the catheter to inflate the balloon, and the inflated balloon may be used for an expanding purpose, and the like, and includes an airway expanding balloon catheter for expanding an airway.

According to the patent publication numbers: CN113332567A, discloses a dilatation balloon catheter, comprising: the head part is connected to the first end of the balloon, and the outer tube is connected to the second end of the balloon and extends into the balloon; the guide wire penetrates through the head, the balloon and the outer tube and is fixedly connected with the head; the guide wire comprises a first guide wire section and a second guide wire section; the first guide wire section penetrates through the first end of the balloon, the first end of the first guide wire section is located in the head, the second end of the first guide wire section is located in the balloon, the first end of the second guide wire section is connected with the second end of the first guide wire section, the second guide wire section is located in the balloon, the first end of the second guide wire section is located outside the outer tube, and the second end of the second guide wire section is located in the outer tube; the diameter of the first guide wire section is gradually increased, and the diameter of the second guide wire section is gradually decreased.

Based on the above search, in combination with the prior art, it is found that the angle of the balloon cannot be flexibly adjusted, and because the airway is of a curved irregular shape, if the balloon moves in the airway in a straight state, the balloon is easily curved or stuck on the inner wall of the airway, which causes unnecessary troubles and affects the normal operation of the surgical treatment.

Disclosure of Invention

The present invention is directed to a balloon dilatation catheter carrying a drug to solve the above-mentioned problems of the prior art.

The technical scheme of the invention is as follows: a balloon dilatation catheter carrying medicine comprises an outer catheter, wherein one end of the outer catheter is connected with a corrugated pipe, one end of the corrugated pipe is connected with a balloon, and the balloon dilatation catheter further comprises a catheter body; the end sleeve is arranged at the other end of the outer side of the outer guide pipe; a sealing clapboard is fixed at one end of the outer side of the inflation tube, the sealing clapboard is fixed at one end of the inner side of the balloon, and an inflation insertion tube extending to the outside of the end sleeve is inserted and fixed at the position of one side of the inflation tube at the other end; the balloon angle adjusting mechanism is arranged on the inner sides of the outer catheter and the end sleeve; the medicine feeding device comprises an outer casing, wherein four medicine feeding mechanisms which are arranged circumferentially and have the same structure are arranged inside the outer casing; the balloon angle adjusting mechanism comprises a fixed cross fixed at one end of the inner side of the end sleeve, a steering ball rod is fixed at the position, located at the center, of one side of the fixed cross, a steering ball is fixed at one end of the steering ball rod, a steering block is sleeved on the outer side of the steering ball in a rotating mode, a movable cross is fixed at one end of the steering block, four first stay wires which are arranged in a rectangular mode are connected at the position, located at four corners, of one side of the movable cross, and one end of each first stay wire is connected with one side of a sealing partition plate.

Preferably, send medicine mechanism including offer in the medicine storage groove of the inside one side of outer shell with offer in the medicine outlet that outer shell one end corresponds medicine storage groove position department, the inboard one end in medicine storage groove is fixed with the division board, sliding connection is run through to the inside of division board has the second to act as go-between, the one end that the second was acted as go-between is fixed with the sliding plate, sliding plate sliding connection is in the inboard in medicine storage groove, and the one end of sliding plate corresponds the position department that goes out the medicine outlet and is fixed with slide damper, the other end of sliding plate is connected with the cover and locates the third spring in the second outside of acting as go-between, the one end of third spring is connected with the one end of division board.

Preferably, the balloon angle adjusting mechanism further comprises four hydraulic driving mechanisms which are circumferentially arranged at the inner sides of the outer guide pipe and the end sleeve, each hydraulic driving mechanism comprises a first piston cylinder fixed at one end of the inner side of the outer guide pipe and a second piston cylinder fixed at one end of the inner side of the end sleeve, the first piston cylinder and the second piston cylinder are communicated through a communicating pipe, a first piston is slidably connected to the inner side of the first piston cylinder, a first piston push rod extending to the outer portion of the first piston cylinder is fixed at one end of the first piston, one end of the first piston push rod is elastically connected with one side of the sealing partition plate, one end of the first piston is connected with a second spring sleeved on the outer side of the first piston push rod, one end of the second spring is connected with one end of the inner side of the first piston cylinder, a second piston push rod is slidably inserted into one end of the second piston cylinder, one end of the second piston push rod abuts against one side of the movable cross frame, the other end of the second piston push rod is fixed with a second piston slidably connected with one end of the inner side of the second piston cylinder, and saline is filled between the first piston cylinder and the inner side of the physiological saline pipe.

Preferably, an operating rod extending to the outside of the end socket sleeve is fixed to the other side of the movable cross, and an operating handle is fixed to one end of the operating rod.

Preferably, a limiting slide bar is fixed at one end of the inner side of the medicine storage groove, a sliding groove is formed in the position, corresponding to the limiting slide bar, of one side of the sliding plate, and the limiting slide bar is connected with the inner side of the sliding groove in a sliding mode.

Preferably, one end of the second pull wire extends to the outer side of the outer casing, and a pull ring is fixed to one end of the second pull wire.

Preferably, the sliding baffle is of an arc structure.

Preferably, the outer side of the inflation tube is fixed with a bracket at equal intervals, and the outer side of the bracket is fixed with the inner side of the outer conduit.

Preferably, the first piston cylinder and the second piston cylinder are provided with air holes at one end of the outer side.

Preferably, one end of the inner side of the inflating cannula is provided with a one-way valve.

The invention provides a balloon dilatation catheter carrying a drug by improving the prior art, and has the following improvements and advantages:

one is as follows: according to the invention, the angle of the balloon can be flexibly adjusted through the balloon angle adjusting mechanism, and in a bent air passage, the angle of the balloon can be changed along with the bending angle of the air passage, so that the balloon can move in the air passage smoothly, the balloon is prevented from being bent or clamped in the air passage, and the treatment operation difficulty is increased.

The second step is as follows: according to the invention, the medicine feeding mechanism can feed the therapeutic medicine into the designated position in the airway along with the saccule, so that the medicine feeding difficulty is reduced, and the therapeutic effect is improved.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective sectional view of the present invention;

FIG. 3 is an enlarged schematic view of the invention at A of FIG. 2;

FIG. 4 is an enlarged view of the structure of FIG. 2 at B according to the present invention;

FIG. 5 is a schematic cross-sectional view of a first embodiment of the present invention;

FIG. 6 is a cross-sectional view of a second embodiment of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at C in accordance with the present invention;

fig. 8 is an enlarged view of the structure of fig. 6 at D according to the present invention.

Reference numerals:

1. an outer catheter; 2. a bellows; 3. a balloon; 4. an inflation tube; 5. sealing the partition plate; 6. an end socket; 7. inflating and inserting the pipe; 8. a support; 101. fixing a cross; 102. a steering cue; 103. a steering ball; 104. a turning block; 105. a movable cross; 106. a first pull wire; 107. an operating lever; 108. an operating handle; 201. a first piston cylinder; 202. a second piston cylinder; 203. a communicating pipe; 204. a first piston pushrod; 205. a first piston; 206. a second piston push rod; 207. a second piston; 208. a first spring; 209. air holes; 210. a second spring; 301. an outer casing; 302. a drug storage tank; 303. a separator plate; 304. a sliding plate; 305. a second pull wire; 306. a third spring; 307. a medicine outlet; 308. a sliding baffle; 309. a limiting slide bar; 310. a chute; 311. and (4) a pull ring.

Detailed Description

The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The invention provides a balloon dilatation catheter carrying medicine through improvement, and the technical scheme of the invention is as follows:

the first embodiment is as follows:

as shown in fig. 1 to 8, an embodiment of the present invention provides a balloon dilatation catheter carrying drugs, including an outer catheter 1, wherein one end of the outer catheter 1 is connected with a bellows 2, and one end of the bellows 2 is connected with a balloon 3; the end sleeve 6 is arranged at the other end of the outer side of the outer guide pipe 1; the inflatable balloon comprises an inflatable tube 4, wherein a sealing partition plate 5 is fixed at one end of the outer side of the inflatable tube 4, the sealing partition plate 5 is fixed at one end of the inner side of the inflatable balloon 3, an inflatable insertion tube 7 extending to the outside of an end sleeve 6 is inserted and fixed at the position of the other end of one side of the inflatable tube 4, a one-way valve is installed at one end of the inner side of the inflatable insertion tube 7, the one-way valve prevents air inside the inflatable balloon 3 from leaking through the inflatable tube 4 and the inflatable insertion tube 7, supports 8 are fixed at equal intervals on the outer side of the inflatable tube 4, the outer side of each support 8 is fixed with the inner side of the outer catheter 1, and each support 8 is used for fixing the inflatable tube 4, so that the stability of the inflatable balloon is improved; the balloon angle adjusting mechanism is arranged on the inner sides of the outer catheter 1 and the end sleeve 6; the outer casing 301, four medicine feeding mechanisms which are arranged circumferentially and have the same structure are arranged inside the outer casing 301; the balloon angle adjusting mechanism comprises a fixed cross 101 fixed at one end of the inner side of the end sleeve 6, a steering ball rod 102 is fixed at the position of the center of one side of the fixed cross 101, a steering ball 103 is fixed at one end of the steering ball rod 102, a steering block 104 is sleeved on the outer side of the steering ball 103 in a rotating mode, a movable cross 105 is fixed at one end of the steering block 104, four first stay wires 106 which are arranged in a rectangular mode are connected at the position of four corners of one side of the movable cross 105, and one ends of the four first stay wires 106 are connected with one side of the sealing partition plate 5.

Further, the medicine feeding mechanism comprises a medicine storage groove 302 arranged at one side inside the outer casing 301 and a medicine outlet 307 arranged at one end of the outer casing 301 corresponding to the position of the medicine storage groove 302, a separation plate 303 is fixed at one end inside the medicine storage groove 302, a second pull wire 305 is connected inside the separation plate 303 in a penetrating and sliding manner, a sliding plate 304 is fixed at one end of the second pull wire 305, the sliding plate 304 is connected inside the medicine storage groove 302 in a sliding manner, a sliding baffle 308 is fixed at one end of the sliding plate 304 corresponding to the position of the medicine outlet 307, a third spring 306 sleeved outside the second pull wire 305 is connected at the other end of the sliding plate 304, one end of the third spring 306 is connected with one end of the separation plate 303,

further, an operating rod 107 extending to the outside of the tip sleeve 6 is fixed to the other side of the movable cross 105, an operating handle 108 is fixed to one end of the operating rod 107, medicines are placed at one end of the inner side of the medicine storage groove 302 through the medicine outlet 307, when the catheter is integrally moved to a specified position in the airway, the second pull wire 305 is pulled outwards through the pull ring 311, the second pull wire 305 drives the sliding plate 304 and the sliding baffle 308 to move, the sliding plate 304 moves to compress the third spring 306, the sliding baffle 308 moves towards the direction of the partition plate 303 to enable the medicine outlet 307 to be communicated with the medicine storage groove 302, and at the moment, medicines placed at the inner side of the medicine storage groove 302 fall on the inner wall of the airway through the medicine outlet 307 under the action of gravity, so that the effect of rapid medicine delivery is achieved.

Furthermore, a limiting sliding strip 309 is fixed at one end of the inner side of the medicine storage groove 302, a sliding groove 310 is formed in the position, corresponding to the limiting sliding strip 309, of one side of the sliding plate 304, the limiting sliding strip 309 is in sliding connection with the inner side of the sliding groove 310, the limiting sliding strip 309 is in sliding connection with the sliding groove 310 in a matched mode, the sliding plate 304 is limited, and the sliding plate is prevented from rotating.

Further, one end of the second pulling wire 305 extends to the outer side of the outer casing 301, and a pulling ring 311 is fixed to one end of the second pulling wire 305, and the pulling ring 311 is used for pulling the second pulling wire 305, so that the operation is facilitated.

Furthermore, the sliding baffle 308 is of an arc structure, and the sliding baffle 308 of the arc structure can be attached to the inner side of the medicine outlet 307, so that the medicine is prevented from leaking.

The working principle is as follows: when the device is used, the catheter is integrally inserted into the air passage, the balloon 3 is moved to a specified position in the air passage, because the air passage is curved, in order to enable the balloon 3 to smoothly and quickly move to the specified position in the air passage, the angle of the balloon 3 needs to be adjusted in real time by using the balloon angle adjusting mechanism, an operating handle 108 of the balloon angle adjusting mechanism is held by a hand, when the operating handle 108 is rotated in one direction, the operating handle 108 drives the movable cross 105 to rotate in the specified direction through an operating rod 107, one first pull wire 106 at one end is pulled when the movable cross 105 rotates, the opposite first pull wire 106 is in a loose state, the pulled first pull wire 106 pulls the sealing partition plate 5 and the movable cross 105 to rotate simultaneously, the sealing partition plate 5 drives the balloon 3 to rotate in the same direction, and therefore the effect that a doctor adjusts the angle of the balloon 3 in vitro is achieved, the balloon 3 can be conveniently and smoothly moved in the airway, the balloon 3 is prevented from being bent or clamped in the airway, and the treatment operation difficulty is increased, because one side of the movable cross 105 is connected with the four first pull wires 106, the balloon 3 can be driven to rotate for 360 degrees through the principle, the angle adjustment flexibility of the balloon 3 is improved, the operation is simple, after the balloon 3 is moved to a designated position, the inner side of the inflating intubation tube 7 is inflated through an external air pump, air flows into the inner side of the inflating tube 4 through the inflating intubation tube 7, flows into the inner side of the balloon 3 through one end of the inflating tube 4, the balloon 3 is inflated through the air, the airway can be supported through the inflation of the balloon 3, the airway expansion effect is realized, when the medicine is required to be released in the airway, the medicine is placed at one end of the inner side of the medicine storage groove 302 through the medicine outlet 307 before use, when the catheter is integrally moved to a designated position in the airway, outwards pulling the second guy wire 305 through the pull ring 311, the second guy wire 305 drives the sliding plate 304 and the sliding baffle 308 to move, the sliding plate 304 moves to compress the third spring 306, the sliding baffle 308 moves towards the direction of the isolation plate 303, so that the medicine outlet 307 is communicated with the medicine storage groove 302, at the moment, the medicine placed on the inner side of the medicine storage groove 302 falls on the inner wall of the air passage through the medicine outlet 307 under the action of gravity, the effect of quickly sending the medicine is realized, after the medicine is released, the pull ring 311 is loosened, the third spring 306 releases elastic force to push the sliding plate 304 and the sliding baffle 308 to reversely move, so that the sliding baffle 308 isolates the medicine outlet 307 from the medicine storage groove 302, and the medicine storage groove 302 is sealed.

Example two:

based on the drug-carrying balloon dilatation catheter provided in the first embodiment of the present application, a second embodiment of the present application proposes another drug-carrying balloon dilatation catheter. The second embodiment is merely a further way of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

A second embodiment of the invention will now be further described with reference to figures 6 to 8 and the accompanying drawings: the balloon angle adjusting mechanism further comprises four hydraulic driving mechanisms which are circumferentially arranged on the inner sides of the outer catheter 1 and the end sleeve 6, each hydraulic driving mechanism comprises a first piston cylinder 201 fixed at one end of the inner side of the outer catheter 1 and a second piston cylinder 202 fixed at one end of the inner side of the end sleeve 6, the first piston cylinder 201 and the second piston cylinder 202 are communicated through a communicating pipe 203, the inner side of the first piston cylinder 201 is connected with a first piston 205 in a sliding manner, one end of the first piston 205 is fixed with a first piston push rod 204 which extends to the outside of the first piston cylinder 201, one end of the first piston push rod 204 is elastically connected with one side of the sealing partition plate 5, one end of the first piston 205 is connected with a second spring 210 which is sleeved on the outer side of the first piston push rod 204, one end of the second spring 210 is connected with one end of the inner side of the first piston cylinder 201, one end of the second piston cylinder 202 is slidably inserted with the second piston push rod 206, one end of the second piston push rod 206 is abutted against one side of the movable cross 105, the other end of the second piston push rod 206 is fixed with the second piston 207 slidably connected to the inner side of the second piston cylinder 202, one end of the second piston 207 is connected with the first spring 208, one end of the first spring 208 is connected with one end of the inner side of the second piston cylinder 202, the first piston cylinder 201, the second piston cylinder 202 and the communicating pipe 203 are filled with physiological saline, and the air holes 209 are formed in one ends of the outer sides of the first piston cylinder 201 and the second piston cylinder 202.

The working principle is as follows: when the angle of the balloon 3 is adjusted, a doctor holds the operating handle 108 of the balloon angle adjusting mechanism by hand, when the operating handle 108 is rotated in one direction, the operating handle 108 drives the movable cross 105 to rotate through the operating rod 107, one end of the second piston push rod 206 abuts against one side of the movable cross 105, when the movable cross 105 rotates in one direction, the movable cross 105 pushes one side of the second piston push rod 206 to move towards the inner side of the second piston cylinder 202, the second piston push rod 206 drives the second piston 207 to move leftwards, the second piston 207 moves leftwards to compress the first spring 208, when the second piston 207 moves leftwards, the saline at one end of the inner side of the second piston cylinder 202 is pressed to one end of the inner side of the first piston cylinder 201 through the communicating pipe 203, the saline pushes the first piston 205 to move leftwards under the pressure, the first piston 205 moves leftwards to push the first piston push rod 204 to extend towards the outer side of the first piston cylinder, the first piston push rod 204 can push the sealing partition board 5 to rotate in the same direction as the movable cross 105, the sealing partition board 5 drives the balloon 3 to rotate in the same direction, at this time, because one end of the other second piston push rod 206 at the opposite position of the pushed second piston push rod 206 is separated from one side of the movable cross 105, the elastic force of the other second piston push rod 206 is released relative to one first spring 208 to push the second piston 207 to move right, the second piston 207 pushes the second piston push rod 206 at the opposite position to extend out of the second piston cylinder 202, the right movement of the second piston 207 increases the space at the left end of the second piston cylinder 202, the saline at the right end of one first piston cylinder 201 flows to the space at the left end of the second piston cylinder 202 through the communicating pipe 203, because the saline at the right end of the first piston cylinder 201 flows out, the elastic force of the second spring 210 releases the elastic force to push the first piston 205 and the first piston push rod 204 to move right, the first piston push rod 204 moves right to retract into the inside of the first piston cylinder 201, the opposite side of 5 of sealed baffle of pulling simultaneously to can adjust the angle of sealed baffle 5, and then adjust sacculus 3's angle, be convenient for sacculus 3 smooth remove in the air flue, prevent that sacculus 3 from buckling or block in the air flue, increase the treatment operation degree of difficulty.

The previous description is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carry sacculus dilatation catheter of medicine, includes outer catheter (1), bellows (2) are connected to the one end of outer catheter (1), the one end of bellows (2) is connected with sacculus (3), its characterized in that: also includes;

the end socket sleeve (6), the end socket sleeve (6) is arranged at the other end of the outer side of the outer conduit (1);

a sealing partition plate (5) is fixed at one end of the outer side of the inflation tube (4), the sealing partition plate (5) is fixed at one end of the inner side of the balloon (3), and an inflation insertion tube (7) extending to the outside of the end sleeve (6) is inserted and fixed at the position of the other end of one side of the inflation tube (4);

the balloon angle adjusting mechanism is arranged on the inner sides of the outer catheter (1) and the end sleeve (6);

the medicine feeding device comprises an outer casing (301), wherein four medicine feeding mechanisms which are arranged in a circumferential manner and have the same structure are arranged inside the outer casing (301);

the balloon angle adjusting mechanism comprises a fixed cross (101) fixed at one end of the inner side of an end sleeve (6), a steering ball rod (102) is fixed at the position of the center of one side of the fixed cross (101), a steering ball rod (103) is fixed at one end of the steering ball rod (102), a steering block (104) is sleeved on the outer side of the steering ball (103) in a rotating mode, a movable cross (105) is fixed at one end of the steering block (104), four first stay wires (106) which are arranged in a rectangular mode are connected at the position of four corners of one side of the movable cross (105), and the one end of each first stay wire (106) is connected with one side of a sealing partition plate (5).

2. The drug-carrying balloon dilation catheter according to claim 1, wherein: the medicine feeding mechanism comprises a medicine storage groove (302) formed in one side of the inner portion of the outer casing (301) and a medicine outlet (307) formed in the position, corresponding to the medicine storage groove (302), of one end of the outer casing (301), a partition plate (303) is fixed to one end of the inner side of the medicine storage groove (302), a second pull wire (305) is connected to the inner portion of the partition plate (303) in a penetrating and sliding mode, a sliding plate (304) is fixed to one end of the second pull wire (305), the sliding plate (304) is connected to the inner side of the medicine storage groove (302) in a sliding mode, a sliding baffle (308) is fixed to the position, corresponding to the medicine outlet (307), of one end of the sliding plate (304), a third spring (306) sleeved on the outer side of the second pull wire (305) is connected to the other end of the sliding plate (304), and one end of the third spring (306) is connected to one end of the partition plate (303).

3. A drug-loaded balloon dilation catheter according to claim 1, wherein: the balloon angle adjusting mechanism further comprises four hydraulic driving mechanisms which are circumferentially arranged on the inner sides of the outer catheter (1) and the end sleeve (6), each hydraulic driving mechanism comprises a first piston cylinder (201) fixed at one end of the inner side of the outer catheter (1) and a second piston cylinder (202) fixed at one end of the inner side of the end sleeve (6), the first piston cylinder (201) and the second piston cylinder (202) are communicated through a communicating pipe (203), the inner side of the first piston cylinder (201) is connected with a first piston (205) in a sliding manner, one end of the first piston (205) is fixed with a first piston push rod (204) extending to the outer part of the first piston cylinder (201), one end of the first piston push rod (204) is elastically connected with one side of a sealing partition plate (5), one end of the first piston (205) is connected with a second spring (210) sleeved on the outer side of the first piston push rod (204), one end of the second spring (210) is connected with one end of the inner side of the first piston cylinder (201), one end of the second piston cylinder (202) is inserted into one end of a second piston cylinder (206) and connected with a movable frame (207), one end of the second piston (207) is connected with one end of the second piston cylinder (207), and one end of the second piston (207) is connected with a cross piston (206) is movably connected with the second piston (207), one end of the first spring (208) is connected with one end of the inner side of the second piston cylinder (202), and physiological saline is filled among the first piston cylinder (201), the second piston cylinder (202) and the communicating pipe (203).

4. The drug-carrying balloon dilation catheter according to claim 1, wherein: an operating rod (107) extending to the outside of the end socket (6) is fixed to the other side of the movable cross (105), and an operating handle (108) is fixed to one end of the operating rod (107).

5. A drug-carried balloon dilation catheter according to claim 2, wherein: a limiting sliding strip (309) is fixed at one end of the inner side of the medicine storage groove (302), a sliding groove (310) is formed in the position, corresponding to the limiting sliding strip (309), of one side of the sliding plate (304), and the limiting sliding strip (309) is connected with the inner side of the sliding groove (310) in a sliding mode.

6. A drug-carried balloon dilation catheter according to claim 2, wherein: one end of the second pull wire (305) extends to the outer side of the outer casing (301), and a pull ring (311) is fixed at one end of the second pull wire (305).

7. The drug-carrying balloon dilation catheter of claim 2, wherein: the sliding baffle (308) is of an arc-shaped structure.

8. A drug-loaded balloon dilation catheter according to claim 1, wherein: the outer side of the air charging pipe (4) is fixed with supports (8) at equal intervals, and the outer side of each support (8) is fixed with the inner side of the outer conduit (1).

9. A drug-carried balloon dilation catheter according to claim 3, wherein: air holes (209) are formed in one ends of the outer sides of the first piston cylinder (201) and the second piston cylinder (202).

10. The drug-carrying balloon dilation catheter according to claim 1, wherein: one end of the inner side of the inflating insertion pipe (7) is provided with a one-way valve.