CN115463318A

CN115463318A - Medicine-recyclable balloon catheter

Info

Publication number: CN115463318A
Application number: CN202211180616.2A
Authority: CN
Inventors: 肖金金; 刘朝生; 周友明; 张志旋; 韦政军; 郭新宇; 李琴芳; 林浩
Original assignee: Guangdong Bomai Medical Technology Co Ltd
Current assignee: Guangdong Bomai Medical Technology Co Ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-12-13
Anticipated expiration: 2042-09-27
Also published as: CN115463318B

Abstract

The application provides a recoverable sacculus pipe of medicine, it includes the connecting pipe, the sacculus of giving medicine to the poor free of charge, retrieve the structure, first magnetism is inhaled structure and second magnetism and is inhaled the structure, the connecting pipe includes inner tube and outer tube, the inner tube is located inside the outer tube, it fills the pressure release passageway to form between outer tube and the inner tube, the inner tube is used for supplying the seal wire to pass, the sacculus of giving medicine to the poor free of charge is connected on the outer tube, with filling the pressure release passageway intercommunication, retrieve the structural connection on the outer tube, set up with the sacculus interval of giving medicine to the poor free of charge, first magnetism is inhaled the structural connection on the inner tube, be located inside the sacculus of giving medicine to the poor free of charge, magnetism medicine adsorbs on the sacculus surface of giving medicine to the poor free of charge, second magnetism is inhaled the structural connection on retrieving, be used for inhale the structure with the magnetism of not being absorbed magnetism. The recoverable sacculus pipe of medicine of this application embodiment can improve the attachment rate of medicine, reduces the loss of sacculus pipe propelling movement medicine in the blood vessel, can control the accurate release of medicine, can retrieve the medicine, reduces the medicine and remains.

Description

Medicine-recyclable balloon catheter

Technical Field

The application belongs to the technical field of medical equipment, and more specifically relates to a balloon catheter with recyclable medicines.

Background

Vascular intervention therapy is an important treatment mode for revascularization treatment of vascular stenosis. In vascular interventional therapy, a balloon catheter is generally used as a main vascular interventional therapy instrument. In order to avoid the loss of the medicine in the interventional operation process, the medicine mixed iron powder can be made into magnetic medicine, a magnetic attraction structure is arranged in the balloon catheter, and the magnetic medicine is adsorbed on the surface of the balloon. The balloon catheter in the prior art utilizes a magnetic attraction structure to control the precise release of the drug, but does not recover the unabsorbed drug.

Disclosure of Invention

An object of the embodiment of the present application is to provide a balloon catheter capable of recycling drugs, so as to solve the technical problem existing in the prior art that the unabsorbed drugs are not recycled.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: a drug-retrievable balloon catheter is provided for delivering a magnetic drug, comprising:

the connecting pipe comprises an inner pipe and an outer pipe, the inner pipe is positioned in the outer pipe, a pressure charging and releasing channel is formed between the outer pipe and the inner pipe, and the inner pipe is used for a guide wire to pass through;

the medicine applying saccule is connected to the outer tube and is communicated with the pressure charging and releasing channel;

the recovery structure is connected to the outer tube and is arranged at intervals with the drug delivery balloon;

the first magnetic attraction structure is connected to the inner tube, is positioned in the drug delivery balloon and is used for controlling the magnetic drug to be adsorbed on the surface of the drug delivery balloon;

the second magnetic attraction structure is connected to the inner tube, is positioned inside the recovery structure and is used for magnetically attracting the magnetic medicine which is not absorbed onto the recovery structure.

In one embodiment, the first magnetic attraction structure includes a first magnetic core and a first spiral line, the first magnetic core is in a hollow tubular shape, the first magnetic core is sleeved on the inner tube, and the first spiral line is sleeved on the first magnetic core;

the second magnetic attraction structure comprises a second magnetic core and a second spiral line, the second magnetic core is in a hollow tubular shape, the second magnetic core is sleeved on the inner tube, and the second spiral line is sleeved on the second magnetic core.

In one embodiment, the first magnetic attraction structure further includes a first wire and a first switch, one end of the first wire is electrically connected to the first spiral line, and the other end of the first wire is electrically connected to the first switch;

the second magnetic attraction structure further comprises a second wire and a second switch, one end of the second wire is electrically connected with the second spiral line, and the other end of the second wire is electrically connected with the second switch.

In one embodiment, the middle part of the first conducting wire is positioned in the inner tube, and one end of the first conducting wire penetrates through the inner wall of the inner tube and is electrically connected with the first spiral line;

one end of the second lead penetrates through the inner wall of the inner tube and is electrically connected with the second spiral line.

In one embodiment, said first helix is wound on said first core and said second helix is wound on said second core;

or the first spiral line and the first magnetic core are arranged at intervals, and the second spiral line and the second magnetic core are arranged at intervals.

In one embodiment, the base is connected to one end, far away from the drug delivery balloon, of the connecting pipe in a sealing mode, a first cavity channel, a second cavity channel and a third cavity channel are arranged on the base, the first cavity channel and the second cavity channel are communicated with the inside of the inner pipe, and the third cavity channel is communicated with the pressure charging and releasing channel.

In one embodiment, a plugging portion used for sealing the pressure charging and discharging channel is arranged at one end, far away from the base, of the outer tube, and the plugging portion is conical.

In one embodiment, a visualization ring is disposed on the inner tube, the visualization ring being located inside the administration balloon.

In one embodiment, a guide wire joint, a pressure charging and discharging joint, an electric connection end head and a switch seat are arranged on the base, the first cavity is located in the guide wire joint, the second cavity is located in the electric connection end head, the third cavity is located in the pressure charging and discharging joint, and the first switch and the second switch are mounted on the switch seat.

In one embodiment, the first magnetic attraction structure is a permanent magnet, and the second magnetic attraction structure is a permanent magnet.

In one embodiment, the drug delivery device further comprises a balloon protective sleeve, an accommodating cavity is arranged inside the balloon protective sleeve, the balloon protective sleeve is detachably connected to the connecting pipe, and when the balloon protective sleeve is connected to the connecting pipe, the drug delivery balloon and the recovery structure are located in the accommodating cavity.

In one embodiment, the recovery structure is a round balloon or a special-shaped balloon, and the recovery structure is communicated with the inflation and decompression channel.

The beneficial effect of the recoverable sacculus pipe of medicine that this application embodiment provided lies in: compared with the prior art, the recoverable sacculus pipe of medicine of this application embodiment, the inside seal wire that wears to be equipped with of inner tube, conveniently seek vasculopathy department, inside first magnetic attraction structure that sets up of sacculus of giving medicine, inside second magnetic attraction structure that sets up of structure is being retrieved, the magnetism medicine can adsorb on the sacculus surface of giving medicine, first magnetic attraction structure adsorbs the magnetism medicine, improve the adhesion rate of medicine, reduce the loss of medicine in sacculus pipe propelling movement to the blood vessel, give medicine sacculus and pressurize and the pressure release of giving medicine through filling the pressure release passageway, control the shrink and the expansion of sacculus of giving medicine, the accurate release of control medicine, second magnetic attraction structure can adsorb the unabsorbed medicine in blood vessel on retrieving the structure, retrieve the medicine, reduce the medicine residue.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural view of a drug-recyclable balloon catheter provided in an embodiment of the present application;

fig. 2 is a partial structural diagram of an administration balloon of a drug-recyclable balloon catheter provided in an embodiment of the present application;

fig. 3 is a partial structural view of a recycling structure of a balloon catheter capable of recycling drugs provided in an embodiment of the present application;

fig. 4 is a schematic structural view of a first magnetic attraction structure of a balloon catheter capable of recycling drugs provided in an embodiment of the present application;

fig. 5 is a schematic structural view of a second magnetic attraction structure of a balloon catheter with drug retrievable according to an embodiment of the present application;

fig. 6 is a schematic view of a partial structure at a base of a drug-recyclable balloon catheter provided in an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1. a connecting pipe;

11. an inner tube; 12. an outer tube; 121. a plugging section; 13. a pressure charging and releasing channel;

2. a drug delivery balloon; 21. a developing ring;

3. a recovery structure;

4. a first magnetic attraction structure;

41. a first magnetic core; 42. a first spiral line;

5. a second magnetic attraction structure;

51. a second magnetic core; 52. a second spiral line;

6. a base;

61. a guidewire junction; 611. a first channel; 62. connecting a power terminal; 621. a second channel; 63. a pressure charging and discharging joint; 631. a third channel; 64. a switch base; 641. a first switch; 642. a second switch;

7. a balloon protective sheath; 71. an accommodating cavity;

8. a magnetic drug.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

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 be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description 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" 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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Reference throughout this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1 and 2 together, a balloon catheter for drug recycling provided in the embodiments of the present application will now be described. The balloon catheter with the recoverable medicine is used for applying the magnetic medicine 8 and comprises a connecting pipe 1, a medicine applying balloon 2, a recovery structure 3, a first magnetic attraction structure 4 and a second magnetic attraction structure 5. The connecting pipe 1 comprises an inner pipe 11 and an outer pipe 12 which are of a hollow structure, the inner pipe 11 is located inside the outer pipe 12, a pressure charging and releasing channel 13 is formed between the outer pipe 12 and the inner pipe 11, the inner pipe 11 is used for a guide wire to pass through, and the guide wire is used for conveniently finding a vascular lesion. The medicine applying sacculus 2 is connected on the outer tube 12 and is communicated with the pressure charging and releasing channel 13, the medicine applying sacculus 2 is wrapped and connected outside the outer tube 12, the outer tube 12 is provided with an opening corresponding to the position of the medicine applying sacculus 2, and the pressure charging and releasing channel 13 and the medicine applying sacculus 2 are communicated through the opening. The pressure charging and releasing channel 13 charges and releases pressure to the medicine applying saccule 2 to control the contraction and expansion of the medicine applying saccule 2. The recovery structure 3 is connected to the outer tube 12 and is arranged at an interval with the drug delivery balloon 2. First magnetism is inhaled structure 4 and is connected on inner tube 11, is located the sacculus 2 inside of giving medicine to poor free of charge for control magnetism medicine 8 adsorbs on the sacculus 2 surface of giving medicine to poor free of charge. The second magnetic attraction structure 5 is connected to the inner tube 11 and located inside the recovery structure 3, and is used for magnetically attracting the unabsorbed magnetic drug 8 to the recovery structure 3.

The beneficial effect of the recoverable sacculus pipe of medicine that this application embodiment provided lies in: compared with the prior art, the recoverable sacculus pipe of medicine of this application embodiment, the inside seal wire that wears to be equipped with of inner tube 11, conveniently find vasculopathy department, 2 inside first magnetic absorption structures 4 that set up of sacculus of giving medicine to the poor free of charge, 3 inside second magnetic absorption structures 5 that set up of recovery structure, magnetic medicine 8 can adsorb 2 surfaces of sacculus of giving medicine to the poor free of charge, first magnetic absorption structures 4 adsorbs magnetic medicine 8, the adhesion rate of medicine is improved, reduce the loss of the medicine in the sacculus pipe propelling movement to the blood vessel, give medicine to the poor free of charge sacculus 2 through inflating pressure relief channel 13 and pressure relief, control the shrink and the expansion of sacculus 2 of giving medicine to the poor free of charge, the accurate release of control medicine, second magnetic absorption structures 5 can be adsorbed on recovery structure 3 with the unabsorbed medicine in blood vessel, retrieve the medicine, reduce the medicine residue.

Wherein, the magnetic medicine 8 is a mixed composition of medicine and iron powder, the magnetic medicine 8 is in a cone shape, one end is in a sharp shape, and the other end is relatively flat. The smooth surface of the magnetic medicine 8 is conveniently adsorbed on the surface of the medicine applying sacculus 2, and when the medicine applying sacculus 2 is expanded, the sharp end is easier to pierce into a pathological change part, so that the treatment effect is improved.

In one embodiment, referring to fig. 1, fig. 2, fig. 4 and fig. 5, the first magnetic attraction structure 4 includes a first magnetic core 41 and a first spiral wire 42, the first magnetic core 41 is in a hollow tubular shape, the first magnetic core 41 is disposed on the inner tube 11, and the first spiral wire 42 is disposed on the first magnetic core 41. The first magnetic core 41 is made of a magnetic material, the inner diameter of the first magnetic core 41 is larger than the outer diameter of the inner tube 11, and the first magnetic core 41 is welded to the inner tube 11 and fixed in position. The first spiral line 42 is electrified, and the first magnetic attraction structure 4 generates magnetic force through an electromagnetic induction principle, so that the magnetic medicine 8 can be adsorbed on the surface of the medicine applying saccule 2. The sacculus 2 of giving medicine to poor free of charge expands in pathological change department and gives medicine to poor free of charge, breaks off the power supply of first helix 42 this moment, and first magnetism is inhaled structure 4 and is lost magnetic force, makes things convenient for magnetism medicine 8 to break away from the sacculus 2 of giving medicine to poor free of charge, adsorbs in vascular pathological change department, is favorable to the medicine fully to adsorb in vascular pathological change department.

The second magnetic attraction structure 5 comprises a second magnetic core 51 and a second spiral line 52, the second magnetic core 51 is in a hollow tubular shape, the second magnetic core 51 is sleeved on the inner tube 11, and the second spiral line 52 is sleeved on the second magnetic core 51. The second magnetic core 51 is made of a magnetic material, the inner diameter of the second magnetic core 51 is larger than the outer diameter of the inner tube 11, and the second magnetic core 51 is welded to the inner tube 11 and fixed in position. The second spiral line 52 is electrified, and the second magnetic attraction structure 5 generates magnetic force by the electromagnetic induction principle, so that the unabsorbed magnetic medicine 8 can be adsorbed on the surface of the recovery structure 3.

In an embodiment, referring to fig. 1, fig. 4, fig. 5, and fig. 6, the first magnetic attraction structure 4 further includes a first conductive line and a first switch 641, one end of the first conductive line is electrically connected to the first spiral line 42, and the other end of the first conductive line is electrically connected to the first switch 641.

The second magnetic structure 5 further includes a second conductive wire and a second switch 642, one end of the second conductive wire is electrically connected to the second spiral line 52, and the other end of the second conductive wire is electrically connected to the second switch 642.

The first wire and the second wire are externally connected with a power supply, and the first wire and the second wire are connected in parallel and do not interfere with each other. First switch 641 controls the energization and de-energization of first helical wire 42 and second switch 642 controls the energization and de-energization of second helical wire 52. The generation and disappearance of the magnetic force of the first magnetic attraction structure 4 and the second magnetic attraction structure 5 are conveniently controlled.

When the balloon catheter is pushed to the lesion, the first switch 641 is only needed to be turned on to control the first magnetic attraction structure 4 to generate magnetic force, so that the medicine is adsorbed on the surface of the medicine application balloon 2. When the medicine application sacculus 2 reaches the pathological change position, the pressure charging and releasing channel 13 charges and presses the medicine application sacculus 2, the medicine application sacculus 2 expands, the magnetic medicine 8 is attached to the pathological change position, the first switch 641 is disconnected, the magnetic force of the first magnetic attraction structure 4 is controlled to disappear, and the medicine is conveniently absorbed by the pathological change position. The second switch 642 is turned on to control the second magnetic attraction structure 5 to generate magnetic force, so as to adsorb the unabsorbed magnetic drug 8 on the surface of the recovery structure 3.

In one embodiment, the first conductive wire is located in the inner tube 11, and the first conductive wire passes through the inner wall of the inner tube 11 and is electrically connected to the first spiral wire 42. The middle of the second conductive wire is located in the inner tube 11, and the second conductive wire passes through the inner wall of the inner tube 11 and is electrically connected to the second spiral line 52. The inner wall of the inner pipe is provided with an opening for the first lead and the second lead to pass through, and then the first lead and the second lead are sealed by sealant, so that the air tightness of the pressure charging and releasing channel is guaranteed.

In one embodiment, referring to fig. 4 and 5, a first helical wire 42 is wound on the first magnetic core 41 and a second helical wire 52 is wound on the second magnetic core 51. The overall size of the first magnetic attraction structure 4 and the second magnetic attraction structure 5 can be reduced, and the space is fully utilized.

The first spiral wire 42 and the first magnetic core 41 may be provided at an interval, and the second spiral wire 52 and the second magnetic core 51 may be provided at an interval. The first spiral wire 42 is suspended outside the first magnetic core 41, and the second spiral wire 52 is suspended outside the second magnetic core 51.

In one embodiment, referring to fig. 2, two developing rings 21 are disposed on the inner tube 11, the two developing rings 21 are disposed inside the administration balloon 2, and the two developing rings 21 are disposed at two ends of the first magnetic attraction structure 4. The developing ring 21 is arranged, so that the position and the condition of the lesion part can be conveniently observed.

In one embodiment, referring to fig. 1 and 6, the balloon catheter for drug recycling further includes a base 6, the base 6 is hermetically connected to one end of the connecting tube 1 away from the drug delivery balloon 2, a first channel 611, a second channel 621 and a third channel 631 are disposed on the base 6, the first channel 611 and the second channel 621 are communicated with the inside of the inner tube 11, and the third channel 631 is communicated with the pressure charging and releasing channel 13. The first channel 611, the second channel 621 and the third channel 631 do not interfere with each other, and the third channel 631 facilitates pressurizing and depressurizing the pressurizing and depressurizing channel 13. The base 6 is arranged and connected to one end of the connecting pipe 1 in a sealing mode, the air tightness of the pressure charging and releasing channel 13 is guaranteed, and the medicine applying saccule 2 can be stably contracted and expanded.

In one embodiment, referring to fig. 1 and fig. 3, a blocking portion 121 for sealing the pressure charging and discharging channel 13 is disposed at an end of the outer tube 12 away from the base 6, and the blocking portion 121 is conical. One end of the outer tube 12, which is far away from the base 6, is welded on the inner tube 11, the outer tube 12 is folded towards the inner tube 11 to extend the connection part to form a blocking part 121, and the blocking part 121 is used for ensuring the air tightness of the pressure charging and discharging channel 13 and ensuring the connection stability of the inner tube 11 and the outer tube 12. The conical shape of the sealing portion 121 also ensures easier insertion into the blood vessel during insertion of the blood vessel.

In one embodiment, referring to fig. 1 and 6, the base 6 is provided with a guide wire connector 61, a charging/discharging connector 63, an electrical connection terminal 62, and a switch seat 64, the first channel 611 is located in the guide wire connector 61, the second channel 621 is located in the electrical connection terminal 62, the third channel 631 is located in the charging/discharging connector 63, and the first switch 641 and the second switch 642 are mounted on the switch seat 64. The base 6 is tree-shaped, and the base 6 is used as a handle, so that the handheld operation is convenient. The guide wire is inserted into the inner tube 11 through the first lumen 611 in the guide wire connector 61, and the first guide wire and the second guide wire pass through the inner tube 11 and extend out of the second lumen 621 of the power connector 62. The pressure charging and releasing joint 63 is connected with a pressure charging and releasing device and communicated with the pressure charging and releasing channel 13 through a third cavity channel 631, so that the pressure charging and releasing channel 13 is conveniently charged or released, and further the contraction or expansion of the drug application balloon 2 is controlled.

In one embodiment, the first magnetic attraction structure 4 may also be a permanent magnet, and the second magnetic attraction structure 5 may also be a permanent magnet. Set up first magnetism and inhale structure 4, second magnetism and inhale structure 5 and be the permanent magnet, when the sacculus pipe impeld to pathological change department, the medicine adsorbs on the 2 surfaces of application of medicine sacculus. When the medicine applying sacculus 2 reaches the pathological change position, the pressure charging and releasing channel 13 charges and presses the medicine applying sacculus 2, the medicine applying sacculus 2 expands, and the magnetic medicine 8 is attached to the pathological change position. At the moment, the distance between the magnetic medicine 8 and the permanent magnet inside the medicine applying saccule 2 is increased, the adsorption force of the permanent magnet inside the medicine applying saccule 2 to the magnetic medicine 8 is weakened, and the magnetic medicine 8 can be well absorbed by a lesion. Along with the blood flow, the unabsorbed magnetic drug 8 is driven to move to the recovery structure 3, and the permanent magnet in the recovery structure 3 can adsorb the unabsorbed magnetic drug 8 on the recovery structure 3.

In one embodiment, referring to fig. 1, the balloon catheter capable of recycling the drug further includes a balloon protection sleeve 7, the balloon protection sleeve 7 is provided with an accommodating cavity 71 inside, the balloon protection sleeve 7 is detachably connected to the connecting tube 1, and when the balloon protection sleeve 7 is connected to the connecting tube 1, the drug delivery balloon 2 and the recycling structure 3 are located in the accommodating cavity 71. The balloon protective sleeve 7 can better protect the drug delivery balloon 2 and the recovery structure 3, and the drug delivery balloon 2 and the recovery structure 3 are prevented from being abraded or polluted.

In one embodiment, referring to fig. 1 and 3, the recovery structure 3 is a circular balloon or a shaped balloon, the shaped balloon may be an ellipsoidal balloon or a conical balloon, and the recovery structure 3 is communicated with the pressure charging and discharging channel 13. Retrieve structure 3 through setting up and be the sacculus, and retrieve structure 3 intercommunication and fill pressure release channel 13, can control and retrieve structure 3 shrink and expansion. When the medicine applying sacculus 2 reaches a lesion, the pressure charging and releasing channel 13 charges the medicine applying sacculus 2, the pressure charging and releasing channel 13 charges the recovery structure 3, and the recovery structure 3 expands. Retrieve between structure 3 and the vascular wall clearance and reduce, the magnetism medicine 8 that conveniently does not absorb is retrieved structure 3 and is blockked, and because second magnetism inhale structure 5 adsorb on retrieving structure 3.

The work process of the balloon catheter capable of recycling the medicines comprises the following steps:

the balloon protective sleeve 7 is taken down, the first switch 641 is opened, the magnetic medicine 8 is adsorbed on the medicine applying balloon 2, the guide wire passes through the inner tube 11, and the balloon catheter is pushed to the lesion. When the medicine applying sacculus 2 reaches the lesion, the pressure charging and releasing channel 13 charges the medicine applying sacculus 2, the medicine applying sacculus 2 expands, the magnetic medicine 8 is attached to the lesion, the first switch 641 is disconnected, the second switch 642 is opened, the unabsorbed magnetic medicine 8 is adsorbed on the surface of the recovery structure 3, after medicine application is finished, the pressure charging and releasing channel 13 releases pressure, the medicine applying sacculus 2 contracts, and the sacculus catheter returns to be taken out.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drug-recyclable balloon catheter, comprising:

the recovery structure is connected to the outer tube and is arranged at intervals with the drug application balloon;

the first magnetic attraction structure is connected to the inner tube, is positioned in the drug delivery balloon and is used for controlling magnetic drugs to be adsorbed on the surface of the drug delivery balloon;

2. The drug-retrievable balloon catheter according to claim 1, wherein the first magnetic attraction structure includes a first magnetic core and a first spiral line, the first magnetic core is in a hollow tubular shape, the first magnetic core is sleeved on the inner tube, and the first spiral line is sleeved on the first magnetic core;

3. The drug-retrievable balloon catheter according to claim 2, wherein the first magnetic attraction structure further includes a first wire and a first switch, one end of the first wire is electrically connected to the first spiral line, and the other end of the first wire is electrically connected to the first switch;

4. The drug-retrievable balloon catheter according to claim 3, wherein a middle portion of the first guide wire is located in the inner tube, and one end of the first guide wire penetrates through the inner wall of the inner tube and is electrically connected with the first spiral line;

the middle part of the second lead is positioned in the inner tube, and one end of the second lead penetrates through the inner wall of the inner tube and is electrically connected with the second spiral line.

5. The drug-recyclable balloon catheter as claimed in claim 4, further comprising a base, wherein the base is hermetically connected to one end of the connecting tube away from the drug delivery balloon, the base is provided with a first channel, a second channel and a third channel, the first channel and the second channel are communicated with the inside of the inner tube, and the third channel is communicated with the pressure charging and releasing channel.

6. The drug-recoverable balloon catheter according to claim 5, wherein a blocking portion for sealing the inflation and deflation channel is arranged at one end of the outer tube, which is far away from the base, and the blocking portion is conical.

7. The drug-retrievable balloon catheter according to claim 5, wherein a guide wire connector, a pressure charging and discharging connector, an electric connector and a switch seat are arranged on the base, the first channel is located in the guide wire connector, the second channel is located in the electric connector, the third channel is located in the pressure charging and discharging connector, and the first switch and the second switch are mounted on the switch seat.

8. The drug-retrievable balloon catheter according to claim 1, wherein the first magnetic attraction structure is a permanent magnet, and the second magnetic attraction structure is a permanent magnet.

9. The drug-recyclable balloon catheter as claimed in any one of claims 1 to 8, further comprising a balloon protective sheath, wherein the balloon protective sheath is provided with a containing cavity inside, the balloon protective sheath is detachably connected to the connecting tube, and when the balloon protective sheath is connected to the connecting tube, the drug delivery balloon and the recovery structure are located in the containing cavity.

10. The drug-recoverable balloon catheter of any of claims 1-8, wherein the retrieval structure is a circular balloon or a profiled balloon, and the retrieval structure is in communication with the inflation/deflation channel.