Drug delivery balloon and drug delivery device equipped with the same

Abstract

The present invention belongs to the field of medical device technology, and specifically relates to a drug delivery balloon and a drug delivery device equipped with the same, wherein the balloon comprises an airbag body, the airbag body comprises a first wall and an air cavity, an inlet and outlet assembly is installed in the air cavity, the inlet and outlet assembly comprises an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are respectively connected to a vent pipe, an air inlet and an air outlet are respectively provided in the vent pipe, the air inlet and the air outlet are respectively connected to the air inlet pipe and the air outlet, a rotating plate is rotatably installed in the vent pipe, and a vent hole is provided on the rotating plate, an air hole plate is slidably installed inside the rotating plate, an oblique groove is provided on the air hole plate, and a plug-in block is installed on the vent pipe. The present invention drives the air hole on the air hole plate and the rotating plate to overlap by the expansion of the airbag body, so that the airbag body contracts intermittently and slightly during the expansion process, so that the airbag body is ensured to expand the inner membrane to the maximum extent under normal pressure supply state, and the situation of inner membrane rupture is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a drug delivery balloon and a drug delivery device equipped with the same. Background Art

[0002] The drug-eluting balloon is an interventional medical device that is used once. The drug-eluting balloon is a carrier of the drug, that is, it is a means of transport that delivers the drug to the corresponding lesion location of the patient. After the drug-eluting balloon reaches the lesion location of the patient, the balloon expands and fills so that the balloon can fit tightly with the lesion location. Then, after the drug is released, the balloon is withdrawn.

[0003] When the drug balloon reaches the lesion position of the patient, the pressure is increased inside the drug balloon to expand it. For example, a drug delivery device with the publication number CN117717696A points out that the drug balloon expansion catheter has a short expansion time, and the drug is not easy to be released. Moreover, the short expansion time of the drug balloon means that the pressurization speed increases. Since the vascular endothelium at the lesion is narrow and weak, the rapid expansion of the drug balloon is easy to cause endothelium tearing. In order to ensure the complete release of the drug and reduce the damage to the endothelium, the pressurization process needs to be carried out slowly and continuously. When the drug balloon is slowly and continuously expanded, the drug balloon will continue to stretch the endothelium, causing the endothelium to continue to relax. In this process, the drug balloon cannot guarantee the rebound buffering of the endothelium, so that the endothelium cannot be stretched to the maximum extent, which easily leads to the situation that the drug balloon in the normal air pressure range tears the vascular endothelium. Summary of the invention

[0004] The purpose of the present invention is to provide a drug delivery balloon and a drug delivery device equipped therewith to solve the technical problems in the prior art in view of the deficiencies in the prior art.

[0005] The purpose of the present invention can be achieved through the following technical scheme: a drug delivery balloon, which includes an airbag body, the airbag body includes a first wall and an air cavity, a pressure inlet and pressure assembly is installed in the air cavity, the pressure inlet and pressure assembly includes an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are respectively connected to the ventilation pipe, an air inlet and an air outlet are respectively arranged in the ventilation pipe, the air inlet and the air outlet are respectively connected to the air inlet pipe and the air outlet pipe, the air inlet and the air outlet are respectively connected to the air inlet pipe and the air outlet pipe, a rotating plate is rotatably installed in the ventilation pipe, and a vent is arranged on the rotating plate, an air hole plate is slidably installed inside the rotating plate, the air hole plate is arranged with an oblique groove, and a plug-in block is installed on the ventilation pipe; when the air inlet pipe is pressurized, the air hole on the air hole plate and the rotating plate are in a staggered state, and the air pressure pushes the rotating plate to rotate in the direction close to the plug-in block, and when the plug-in block cooperates with the oblique groove, the air hole plate slides inside the rotating plate, and the air hole on the air hole plate and the rotating plate overlaps, and a part of the air pressure inside the air cavity is discharged through the air outlet and the air outlet pipe.

[0006] As a further optimization or improvement of the present scheme, a rotating shaft is installed in the ventilation pipe, a limit rod is slidably installed inside the rotating shaft, the limit rod is connected to the rotating plate through a connecting rod, a compression spring is installed on the end of the limit rod connected to the connecting rod, a stop block is installed on the ventilation pipe, a plate shaft is installed in the ventilation pipe, the plate shaft is connected to the plug-in block and the telescopic block respectively through a rocker, and the rocker is connected to the ventilation pipe through a limit spring, and the limit rod is located between the stop block and the telescopic block; when the boost pressure in the intake pipe causes the rotating plate to rotate, the rotating plate compresses the compression spring through the connecting rod, so that the limit rod rotates along the rotating shaft, and as the rotating shaft moves, the rotating shaft abuts against the telescopic block and causes it to move, and when the rotating shaft moves between the telescopic block and the stop block, the telescopic block resets the limit on the rotating shaft.

[0007] As a further optimization or improvement of the present solution, a plug-in block is installed on the ventilation pipe, and the plug-in block abuts against the rotating plate.

[0008] As a further optimization or improvement of this solution, the air hole plate is connected to the rotating plate via a return spring.

[0009] As a further optimization or improvement of this solution, the airbag body also includes a second wall.

[0010] A drug delivery device, which is provided with the drug delivery balloon as described above, and includes a drug delivery component, which is installed on the airbag body, and the drug delivery component includes a drug delivery head and a lifting box. A partition plate is installed in the drug delivery head, and the partition plate divides the drug delivery head into a liquid guide chamber and a connecting chamber. A lifting box is installed inside the connecting chamber, and a booster plate is installed on the partition plate, and the booster plate is located in the lifting box, and the booster plate divides the lifting box into a liquid storage chamber and an adjusting chamber. A lifting platform is installed in the adjusting chamber, and a gear rod is installed on the booster plate, and a ratchet is installed in the lifting platform, and the ratchet cooperates with the gear rod, and the liquid storage chamber is connected to the liquid guide chamber.

[0011] As a further optimization or improvement of the present solution, the drug delivery assembly further includes a one-way liquid inlet tube, and the liquid storage cavity is connected with the liquid guiding cavity via the one-way liquid inlet tube.

[0012] As a further optimization or improvement of this solution, the drug delivery head is connected to the second wall, and the first wall is connected to the lifting box.

[0013] Beneficial effects of the present invention:

[0014] (1) During the rotation of the rotating plate of the present invention, the rotating plate compresses the compression spring through the connecting rod and drives the limit rod to rotate. When the limit rod passes through the telescopic block, the limit rod abuts against the connecting rod and causes it to contract. When the limit rod moves between the stop block and the telescopic block, the telescopic block resets to limit the limit rod. At this time, the plug-in block is inserted into the inclined slot and drives the pore plate to move inside the rotating plate. The reset spring is compressed. When the pore plate and the vent holes on the rotating plate coincide with each other, the air pressure inside the air cavity is discharged through the air outlet and the air outlet pipe. At this time, the air pressure inside the air cavity decreases, and the airbag body contracts slightly. As the airbag body contracts slightly, the elastic connective tissue in the vascular endothelium contracts. The contracted elastic connective tissue gathers together, making it have higher connectivity. When the airbag body expands again, the airbag body will stretch the contracted endothelium again, and the endothelium is not easy to rupture at this time.

[0015] Specifically, the present invention expands the airbag body to drive the air holes on the pore plate and the rotating plate to overlap, so that the airbag body intermittently contracts slightly during the expansion process, prompting the airbag body to ensure that the inner membrane can expand to the maximum extent under normal pressure supply conditions, greatly reducing the possibility of inner membrane rupture.

[0016] (2) When the present invention is in use, the medicine is placed in the liquid storage chamber. When the air chamber begins to be pressurized, the first wall and the second wall expand, and the first wall drives the liquid medicine inside the liquid storage chamber to enter the liquid guide chamber through the one-way liquid inlet tube, and the liquid medicine is pushed toward the patient's affected part through the liquid guide chamber; when the air pressure inside the air chamber decreases, the first wall contracts slightly, and the first wall drives the lifting box to move downward. At this time, the booster plate moves upward relatively, so that the liquid medicine inside the liquid storage chamber is squeezed by the booster plate, and at the same time, the gear rod moves relatively inside the lifting platform; when the air chamber continues to be pressurized, the ratchet limits the gear rod. At this time, the first wall drives the liquid medicine inside the liquid storage chamber to be sprayed toward the affected part through the one-way liquid inlet tube and the partition plate, thereby achieving directional and precise medication at the patient's lesion location, and having high medication efficiency and medication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall structure of the airbag body.

[0020] Figure 3 Schematic diagram of the internal structure of the airbag body.

[0021] Figure 4 It is a cross-sectional view of the ventilation pipe structure.

[0022] Figure 5 Schematic diagram of the internal structure of the ventilation pipe.

[0023] Figure 6 for Figure 5 A magnified view of the structure of part A.

[0024] Figure 7 for Figure 5 A magnified view of the structure of part B.

[0025] Figure 8 This is the coordination diagram of the air hole plate and the rotating plate.

[0026] Fig. 9 This is a schematic diagram of the connection between the drug delivery component and the airbag body.

[0027] Fig.10 Schematic diagram of the internal structure of the drug delivery component.

[0028] Fig.11 It is a cross-sectional view of the drug delivery component structure.

[0029] The following are marked in the figure: 1. airbag body; 11. air cavity; 12. first wall; 13. second wall; 2. inlet and pressure assembly; 21. air inlet pipe; 22. air outlet pipe; 23. vent pipe; 24. air inlet; 25. air outlet; 26. rotating plate; 28. connecting rod; 29. ​​limiting rod; 210. compression spring; 211. rotating shaft; 212. air hole plate; 213. reset spring; 214. plug-in block; 215. plate shaft; 216. limiting spring; 217. rocker; 218. Telescopic block; 219, stopper; 220, inclined slot; 3, drug delivery assembly; 31, drug delivery head; 32, liquid guide cavity; 33, connecting cavity; 34, partition plate; 35, booster plate; 36, lifting box; 37, liquid storage cavity; 38, regulating cavity; 39, one-way liquid inlet pipe; 310, lifting platform; 311, gear rod; 312, ratchet; 4, connecting rod; 5, flow-blocking balloon; 6, second interface; 7, protective sheath; 8, first connecting seat; 9, first interface; 10, second connecting seat. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 8The present invention is a drug delivery balloon, which includes an airbag body 1, the airbag body 1 includes a first wall 12 and an air cavity 11, an inlet and pressure assembly 2 is installed in the air cavity 11, the inlet and pressure assembly 2 includes an air inlet pipe 21 and an air outlet pipe 22, the air inlet pipe 21 and the air outlet pipe 22 are respectively connected to a vent pipe 23, an air inlet port 24 and an air outlet port 25 are respectively provided in the vent pipe 23, the air inlet port 24 and the air outlet port 25 are respectively connected to the air inlet pipe 21 and the air outlet pipe 22, a rotating plate 26 is rotatably installed in the vent pipe 23, and a vent hole is provided on the rotating plate 26, the rotating plate 2 6, the air hole plate 212 is slidably installed inside, the air hole plate 212 is provided with an inclined groove 220, and the plug-in block 214 is installed on the vent pipe 23; when the air inlet pipe 21 is pressurized, the air holes on the air hole plate 212 and the rotating plate 26 are in a staggered state, and the air pressure pushes the rotating plate 26 to rotate in the direction close to the plug-in block 214. When the plug-in block 214 cooperates with the inclined groove 220, the air hole plate 212 slides inside the rotating plate 26, and the air holes on the air hole plate 212 and the rotating plate 26 overlap, and a part of the air pressure inside the air cavity 11 is discharged through the air outlet 25 and the air outlet pipe 22.

[0032] Specifically, the airbag body 1 further includes a second wall 13 .

[0033] It should be noted that the flow-blocking balloons 5 are installed on both sides of the airbag body 1. The flow-blocking balloon 5 on one side of the airbag body 1 is connected to the first connecting seat 8 and the second connecting seat 10 through the protective sheath 7. The first connecting seat 8 and the second connecting seat 10 are respectively installed with the first interface 9 and the second interface 6.

[0034] After the drug enters the blood vessel, it will be washed away by the blood, causing the drug to fall off the blood vessel, so that the drug balloon cannot fully deliver the drug to the lesion site. Therefore, the present invention slows down the blood circulation at the lesion site by inflating and expanding the two choke balloons 5, thereby reducing the flushing of the drug by the blood under the premise of ensuring blood circulation; the air inlet pipe 21 and the air outlet pipe 22 are respectively connected to the second interface 6 on the second connecting seat 10, and pressure is supplied and discharged to the air inlet pipe 21 and the air outlet pipe 22 through the second interface 6; the first interface 9 on the first connecting seat 8 is connected to the choke balloon 5, and air pressure is provided to the choke balloon 5 through the first interface 9;

[0035] When in use, after the airbag body 1 is placed at the lesion position, air pressure is provided to the flow-blocking balloon 5 through the first interface 9 to slow down the blood flow rate at the lesion position, and then pressurized to the air inlet pipe 21 through the second interface 6. The air pressure pushes the rotating plate 26 to rotate in the direction close to the plug-in block 214 through the air inlet pipe 21, ensuring that the air pressure can enter the air cavity 11 through the air inlet 24. As the air pressure enters the air cavity 11, the first wall 12 and the second wall 13 expand, and the first wall 12 drives the liquid medicine inside the liquid storage cavity 37 to enter the liquid guide cavity 32 through the one-way liquid inlet tube 39, and the liquid medicine is pushed toward the patient's affected part through the liquid guide cavity 32;

[0036] During the rotation of the rotating plate 26, the rotating plate 26 compresses the compression spring 210 through the connecting rod 28 and drives the limiting rod 29 to rotate. Figure 6 When the limit rod 29 passes through the telescopic block 218, the limit rod 29 will abut against the connecting rod 28 and shrink it. When the limit rod 29 moves between the stop block 219 and the telescopic block 218, the telescopic block 218 resets to limit the limit rod 29. At this time, the plug-in block 214 is inserted into the inclined groove 220 and drives the air hole plate 212 to move inside the rotating plate 26. The reset spring 213 is compressed. When the air holes on the air hole plate 212 and the rotating plate 26 coincide, the air pressure inside the air cavity 11 is discharged through the air outlet 25 and the air outlet pipe 22. At this time, the air pressure inside the air cavity 11 is reduced, and the airbag The main body 1 contracts slightly. As the airbag main body 1 contracts slightly, the first wall 12 drives the lifting box 36 to move downward. At this time, the booster plate 35 moves upward relatively, so that the liquid in the liquid storage chamber 37 is squeezed by the booster plate 35. At the same time, the gear rod 311 moves relatively inside the lifting platform 310. As the airbag main body 1 contracts slightly, the elastic connective tissue in the vascular endothelium contracts, and the contracted elastic connective tissue gathers together, making it have higher connectivity. When the airbag main body 1 expands again, the airbag main body 1 will stretch the contracted endothelium again, and the endothelium is not easy to rupture at this time.

[0037] As the rotating plate 26 rotates, the pore plate 212 presses the plug-in block 214, and the plug-in block 214 drives the telescopic block 218 to retract through the rocker 217. At this time, the telescopic block 218 is separated from the limit position of the limit rod 29, and the compression spring 210 rebounds and pushes the rotating plate 26 through the connecting rod 28, so that the pore plate 212 is separated from the plug-in block 214. When the pore plate 212 is separated from the plug-in block 214, the reset spring 213 rebounds and drives the pore plate 212 to reset, so that the pore plate 212 and the vent holes on the rotating plate 26 are restored to an interlaced state. At this time, the air pressure inside the air cavity 11 cannot be discharged through the air outlet pipe 22, and the air cavity 11 continues to be pressurized. The ratchet 312 limits the gear rod 311. At this time, the first wall 12 drives the liquid in the liquid storage cavity 37 to spray to the affected area through the one-way liquid inlet pipe 39 and the partition plate 34, so as to achieve directional and accurate medication at the patient's lesion position.

[0038] It should be noted that a connecting rod 4 is installed on the pressure-injection assembly 2 , and the connecting rod 4 is used to connect and support the airbag body 1 .

[0039] See also Figure 5-Figure 7The vent pipe 23 is provided with a rotating shaft 211, a limiting rod 29 is slidably installed inside the rotating shaft 211, the limiting rod 29 is connected to the rotating plate 26 through a connecting rod 28, a compression spring 210 is installed at one end of the limiting rod 29 connected to the connecting rod 28, a stopper 219 is installed on the vent pipe 23, a plate shaft 215 is installed in the vent pipe 23, the plate shaft 215 is connected to the plug-in block 214 and the telescopic block 218 through a rocker 217, and the rocker 217 is connected to the plug-in block 214 and the telescopic block 218 through a limiting spring 216. The vent pipe 23 is connected, and the limit rod 29 is located between the stop block 219 and the telescopic block 218; when the boost in the intake pipe 21 causes the rotating plate 26 to rotate, the rotating plate 26 compresses the compression spring 210 through the connecting rod 28, so that the limit rod 29 rotates along the rotating shaft 211. As the rotating shaft 211 moves, the rotating shaft 211 abuts against the telescopic block 218 and moves it. When the rotating shaft 211 moves between the telescopic block 218 and the stop block 219, the telescopic block 218 resets the limit to the rotating shaft 211.

[0040] Specifically, a plug-in block 214 is installed on the ventilation pipe 23 , and the plug-in block 214 abuts against the rotating plate 26 .

[0041] Specifically, the air hole plate 212 is connected to the rotating plate 26 via a return spring 213 .

[0042] It should be noted that, in the initial state, Figure 4-Figure 5 As shown, at this time, the air inlet pipe 21 has not been pressurized yet, and the rotating plate 26 is in a vertical state. At this time, the air holes on the air hole plate 212 and the rotating plate 26 are in a staggered state, and the rotating plate 26 blocks the air inlet pipe 21 and the air inlet 24;

[0043] When the airbag body 1 is placed at the lesion site, the air inlet pipe 21 is pressurized, and the air pressure pushes the rotating plate 26 to rotate toward the plug-in block 214 through the air inlet pipe 21, ensuring that the air pressure can enter the air cavity 11 through the air inlet 24. As the air pressure enters the air cavity 11, the airbag body 1 slowly opens and props up the inner membrane;

[0044] During the rotation of the rotating plate 26, the rotating plate 26 compresses the compression spring 210 through the connecting rod 28 and drives the limiting rod 29 to rotate. Figure 6When the limit rod 29 passes through the telescopic block 218, the limit rod 29 will abut against the connecting rod 28 and shrink it. When the limit rod 29 moves between the stop block 219 and the telescopic block 218, the telescopic block 218 resets to limit the limit rod 29. At this time, the plug-in block 214 is inserted into the inclined groove 220 and drives the air hole plate 212 to move inside the rotating plate 26. The reset spring 213 is compressed. When the air holes on the air hole plate 212 and the rotating plate 26 coincide, the air pressure inside the air cavity 11 is discharged through the air outlet 25 and the air outlet pipe 22. At this time, the air pressure inside the air cavity 11 decreases, and the airbag body 1 shrinks slightly. As the airbag body 1 shrinks slightly, the elastic connective tissue in the vascular endothelium shrinks, and the shrinking elastic connective tissue gathers together to make it have higher connectivity. When the airbag body 1 expands again, the airbag body 1 will stretch the shrinking endothelium again, and the endothelium is not easy to rupture at this time.

[0045] As the rotating plate 26 rotates, the air hole plate 212 presses the plug block 214, and the plug block 214 drives the telescopic block 218 to shrink through the rocker 217. At this time, the telescopic block 218 releases the limit of the limit rod 29, and the compression spring 210 rebounds and pushes the rotating plate 26 through the connecting rod 28, so that the air hole plate 212 is separated from the plug block 214. After the air hole plate 212 is separated from the plug block 214, the reset spring 213 rebounds and drives the air hole plate 212 to reset, so that the vents on the air hole plate 212 and the rotating plate 26 are restored to be staggered. State, at this time, the air pressure inside the air cavity 11 cannot be discharged through the air outlet pipe 22, and the airbag body 1 continues to expand. Compared with the continuous expansion or indirect expansion of the airbag body 1 in the prior art, the present invention drives the air hole plate 212 and the air hole on the rotating plate 26 to overlap by the expansion of the airbag body 1, so that the airbag body 1 intermittently contracts slightly during the expansion process, so that the airbag body 1 is under normal pressure supply state, ensuring that the inner membrane can expand to the maximum extent, greatly reducing the situation of inner membrane rupture.

[0046] See also Figure 1-Figure 8 The present invention is a drug delivery device, which has a drug delivery balloon as described in the above embodiment, and includes a drug delivery component 3, which is installed on the airbag body 1, and includes a drug delivery head 31 and a lifting box 36. A partition plate 34 is installed in the drug delivery head 31, and the partition plate 34 divides the drug delivery head 31 into a liquid guide cavity 32 and a connecting cavity 33. A lifting box 36 is installed inside the connecting cavity 33, and a booster plate 35 is installed on the partition plate 34. The booster plate 35 is located in the lifting box 36, and the booster plate 35 divides the lifting box 36 into a liquid storage cavity 37 and an adjusting cavity 38. A lifting platform 310 is installed in the adjusting cavity 38, a gear rod 311 is installed on the booster plate 35, and a ratchet 312 is installed in the lifting platform 310. The ratchet 312 cooperates with the gear rod 311, and the liquid storage cavity 37 is connected with the liquid guide cavity 32.

[0047] Specifically, the drug delivery assembly 3 further includes a one-way liquid inlet tube 39 , and the liquid storage cavity 37 is connected to the liquid guiding cavity 32 via the one-way liquid inlet tube 39 .

[0048] Specifically, the dosing head 31 is connected to the second wall 13 , and the first wall 12 is connected to the lifting box 36 .

[0049] It should be noted that the working steps of the present invention are as follows:

[0050] In the first step, after the airbag body 1 is placed at the lesion position, air pressure is provided to the flow-blocking balloon 5 through the first interface 9 to slow down the blood flow rate at the lesion position, and then pressurized to the air inlet pipe 21 through the second interface 6. The air pressure pushes the rotating plate 26 to rotate in the direction close to the plug-in block 214 through the air inlet pipe 21, ensuring that the air pressure can enter the air cavity 11 through the air inlet 24. As the air pressure enters the air cavity 11, the first wall 12 and the second wall 13 expand, and the first wall 12 drives the liquid medicine inside the liquid storage cavity 37 to enter the liquid guide cavity 32 through the one-way liquid inlet tube 39, and the liquid medicine is pushed toward the patient's affected part through the liquid guide cavity 32;

[0051] In the second step, during the rotation of the rotating plate 26, the rotating plate 26 compresses the compression spring 210 through the connecting rod 28 and drives the limiting rod 29 to rotate. Figure 6 When the limit rod 29 passes through the telescopic block 218, the limit rod 29 will abut against the connecting rod 28 and shrink it. When the limit rod 29 moves between the stop block 219 and the telescopic block 218, the telescopic block 218 resets to limit the limit rod 29. At this time, the plug-in block 214 is inserted into the inclined groove 220 and drives the air hole plate 212 to move inside the rotating plate 26. The reset spring 213 is compressed. When the air holes on the air hole plate 212 and the rotating plate 26 coincide, the air pressure inside the air cavity 11 is discharged through the air outlet 25 and the air outlet pipe 22. At this time, the air pressure inside the air cavity 11 is reduced, and the airbag The main body 1 contracts slightly. As the airbag main body 1 contracts slightly, the first wall 12 drives the lifting box 36 to move downward. At this time, the booster plate 35 moves upward relatively, so that the liquid in the liquid storage chamber 37 is squeezed by the booster plate 35. At the same time, the gear rod 311 moves relatively inside the lifting platform 310. As the airbag main body 1 contracts slightly, the elastic connective tissue in the vascular endothelium contracts, and the contracted elastic connective tissue gathers together, making it have higher connectivity. When the airbag main body 1 expands again, the airbag main body 1 will stretch the contracted endothelium again, and the endothelium is not easy to rupture at this time.

[0052] In the third step, as the rotating plate 26 rotates, the pore plate 212 presses the plug-in block 214, and the plug-in block 214 drives the telescopic block 218 to shrink through the rocker 217. At this time, the telescopic block 218 is separated from the limit position of the limit rod 29, and the compression spring 210 rebounds and pushes the rotating plate 26 through the connecting rod 28, so that the pore plate 212 is separated from the plug-in block 214. When the pore plate 212 is separated from the plug-in block 214, the reset spring 213 rebounds and drives the pore plate 212 to reset, so that the vents on the pore plate 212 and the rotating plate 26 are restored to an interlaced state. At this time, the air pressure inside the air cavity 11 cannot be discharged through the air outlet pipe 22, and the air cavity 11 continues to be pressurized. The ratchet 312 limits the gear rod 311. At this time, the first wall 12 drives the liquid in the liquid storage cavity 37 to spray to the affected area through the one-way liquid inlet pipe 39 and the partition plate 34, so as to achieve directional and accurate medication at the patient's lesion position.

[0053] It should be noted that, when the present invention is in use, the medicine is placed in the liquid storage chamber 37, and when the air chamber 11 begins to be pressurized, the first wall 12 and the second wall 13 expand, and the first wall 12 drives the liquid medicine inside the liquid storage chamber 37 to enter the liquid guide chamber 32 through the one-way liquid inlet tube 39, and the liquid medicine is pushed toward the patient's affected part through the liquid guide chamber 32; when the air pressure inside the air chamber 11 decreases, the first wall 12 contracts slightly, and the first wall 12 drives the lifting box 36 to move downward, at this time the booster plate 35 moves upward relatively, so that the liquid medicine inside the liquid storage chamber 37 is squeezed by the booster plate 35, and at the same time the gear rod 311 moves relatively inside the lifting platform 310; when the air chamber 11 continues to be pressurized, the ratchet 312 limits the gear rod 311, and at this time the first wall 12 drives the liquid medicine inside the liquid storage chamber 37 to be sprayed toward the affected part through the one-way liquid inlet tube 39 and the partition plate 34, so as to achieve directional and precise medication at the patient's lesion location.

[0054] It should be noted that the one-way liquid inlet pipe 39 and the ratchet 312 structure are prior arts, and the present invention will not review them, which does not affect the integrity of the present solution.

[0055] The implementation principle of the present invention is:

[0056] After the airbag body 1 is placed at the lesion position, the air inlet pipe 21 is pressurized, and the air pressure pushes the rotating plate 26 to rotate in the direction close to the plug-in block 214 through the air inlet pipe 21, ensuring that the air pressure can enter the air cavity 11 through the air inlet 24. As the air pressure enters the air cavity 11, the first wall 12 and the second wall 13 expand, and the first wall 12 drives the liquid in the liquid storage cavity 37 to enter the liquid guide cavity 32 through the one-way liquid inlet pipe 39, and the liquid medicine is pushed toward the patient's affected part through the liquid guide cavity 32;

[0057] During the rotation of the rotating plate 26, the rotating plate 26 compresses the compression spring 210 through the connecting rod 28 and drives the limiting rod 29 to rotate. Figure 6When the limit rod 29 passes through the telescopic block 218, the limit rod 29 will abut against the connecting rod 28 and shrink it. When the limit rod 29 moves between the stop block 219 and the telescopic block 218, the telescopic block 218 resets to limit the limit rod 29. At this time, the plug-in block 214 is inserted into the inclined groove 220 and drives the air hole plate 212 to move inside the rotating plate 26. The reset spring 213 is compressed. When the air holes on the air hole plate 212 and the rotating plate 26 coincide, the air pressure inside the air cavity 11 is discharged through the air outlet 25 and the air outlet pipe 22. At this time, the air pressure inside the air cavity 11 is reduced, and the airbag The main body 1 contracts slightly. As the airbag main body 1 contracts slightly, the first wall 12 drives the lifting box 36 to move downward. At this time, the booster plate 35 moves upward relatively, so that the medicine inside the liquid storage chamber 37 is squeezed by the booster plate 35. At the same time, the gear rod 311 moves relatively inside the lifting platform 310; as the airbag main body 1 contracts slightly, the elastic connective tissue in the vascular endothelium contracts, and the contracted elastic connective tissue gathers together to make it have higher connectivity. When the airbag main body 1 expands again, the airbag main body 1 will stretch the contracted endothelium again, and the endothelium is not easy to rupture at this time.

[0058] As the rotating plate 26 rotates, the pore plate 212 presses the plug-in block 214, and the plug-in block 214 drives the telescopic block 218 to retract through the rocker 217. At this time, the telescopic block 218 is separated from the limit position of the limit rod 29, and the compression spring 210 rebounds and pushes the rotating plate 26 through the connecting rod 28, so that the pore plate 212 is separated from the plug-in block 214. When the pore plate 212 is separated from the plug-in block 214, the reset spring 213 rebounds and drives the pore plate 212 to reset, so that the pore plate 212 and the vent holes on the rotating plate 26 are restored to an interlaced state. At this time, the air pressure inside the air cavity 11 cannot be discharged through the air outlet pipe 22, and the air cavity 11 continues to be pressurized. The ratchet 312 limits the gear rod 311. At this time, the first wall 12 drives the liquid in the liquid storage cavity 37 to spray to the affected area through the one-way liquid inlet pipe 39 and the partition plate 34, so as to achieve directional and accurate medication at the patient's lesion position.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A drug delivery balloon, characterized in that: The airbag comprises an airbag body (1), the airbag body (1) comprises a first wall (12) and an air cavity (11), an inlet and pressure assembly (2) is installed in the air cavity (11), the inlet and pressure assembly (2) comprises an air inlet pipe (21) and an air outlet pipe (22), the air inlet pipe (21) and the air outlet pipe (22) are respectively connected to a vent pipe (23), an air inlet port (24) and an air outlet port (25) are respectively provided in the vent pipe (23), the air inlet port (24) and the air outlet port (25) are respectively connected to the air inlet pipe (21) and the air outlet pipe (22), a rotating plate (26) is rotatably installed in the vent pipe (23), and a vent hole is provided on the rotating plate (26), and the rotating plate (26) has an inner portion thereof. The air hole plate (212) is slidably installed, the air hole plate (212) is provided with an inclined groove (220), and the plug-in block (214) is installed on the ventilation pipe (23); when the air inlet pipe (21) is pressurized, the air holes on the air hole plate (212) and the rotating plate (26) are in a staggered state, and the air pressure pushes the rotating plate (26) to rotate in a direction close to the plug-in block (214); when the plug-in block (214) cooperates with the inclined groove (220), the air hole plate (212) slides inside the rotating plate (26), and the air holes on the air hole plate (212) and the rotating plate (26) overlap, and a part of the air pressure inside the air cavity (11) is discharged through the air outlet (25) and the air outlet pipe (22); A rotating shaft (211) is installed in the ventilation pipe (23), a limiting rod (29) is slidably installed inside the rotating shaft (211), the limiting rod (29) is connected to the rotating plate (26) via a connecting rod (28), a compression spring (210) is installed at one end of the limiting rod (29) connected to the connecting rod (28), a stopper (219) is installed on the ventilation pipe (23), a plate shaft (215) is installed in the ventilation pipe (23), the plate shaft (215) is respectively connected to the plug-in block (214) and the telescopic block (218) via a rocker plate (217), and the rocker plate (217) is connected to the plug-in block (214) and the telescopic block (218) via a limiting spring (216). The limit rod (29) is connected to the vent pipe (23), and is located between the stopper (219) and the telescopic block (218). When the pressure in the air intake pipe (21) causes the rotating plate (26) to rotate, the rotating plate (26) compresses the compression spring (210) through the connecting rod (28), so that the limit rod (29) rotates along the rotating shaft (211). As the rotating shaft (211) moves, the rotating shaft (211) abuts against the telescopic block (218) and causes it to move. When the rotating shaft (211) moves between the telescopic block (218) and the stopper (219), the telescopic block (218) resets the limit position of the rotating shaft (211).

2. A drug delivery balloon according to claim 1, characterized in that: A plug-in block (214) is installed on the ventilation pipe (23), and the plug-in block (214) abuts against the rotating plate (26).

3. A drug delivery balloon according to claim 1, characterized in that: The air hole plate (212) is connected to the rotating plate (26) via a return spring (213).

4. A drug delivery balloon according to claim 1, characterized in that: The airbag body (1) also includes a second wall (13).

5. A drug delivery device, characterized in that: The drug delivery device comprises a drug delivery balloon as described in any one of claims 1 to 4, the drug delivery device comprises a drug delivery component (3), the drug delivery component (3) is mounted on the balloon body (1), the drug delivery component (3) comprises a drug delivery head (31) and a lifting box (36), a partition plate (34) is installed inside the drug delivery head (31), the partition plate (34) divides the drug delivery head (31) into a liquid guide cavity (32) and a connecting cavity (33), the connecting cavity (33) is internally installed with a lifting box (36), the partition plate (34) A boost plate (35) is installed on the plate (34), the boost plate (35) is located in the lifting box (36), and the boost plate (35) divides the lifting box (36) into a liquid storage chamber (37) and an adjustment chamber (38), a lifting platform (310) is installed in the adjustment chamber (38), a gear rod (311) is installed on the boost plate (35), a ratchet (312) is installed in the lifting platform (310), the ratchet (312) cooperates with the gear rod (311), and the liquid storage chamber (37) is connected to the liquid guide chamber (32).

6. A drug delivery device according to claim 5, characterized in that: The drug delivery assembly (3) further comprises a one-way liquid inlet tube (39), and the liquid storage chamber (37) is connected to the liquid guide chamber (32) via the one-way liquid inlet tube (39).

7. A drug delivery device according to claim 6, characterized in that: The dosing head (31) is connected to the second wall (13), and the first wall (12) is connected to the lifting box (36).

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