Drug balloon catheter

Abstract

The medicine balloon catheter comprises a base tube, a sealing assembly and a medicine applying assembly, the sealing assembly comprises two sealing balloons, the sealing balloons are arranged on the outer wall of the base tube in a sleeved mode, and the sealing balloons have the first state that the sealing balloons expand in the radial direction and abut against the inner wall of a blood vessel and the second state that the sealing balloons contract and are away from the inner wall of the blood vessel. And a sealing area is arranged between the two sealing balloons. The medicine applying assembly comprises a medicine applying catheter which is arranged in the base pipe in a penetrating mode, and one end of the medicine applying catheter communicates with the sealing area so as to introduce medicine into the sealing area. Firstly, the base tube is guided into a blood vessel of a patient until the base tube reaches a focus. And then the sealing balloon is adjusted to be in the first state, so that the sealing balloon expands in the radial direction and abuts against the inner wall of the blood vessel, and the sealing area can be sealed. At the moment, medicine is guided into the sealed area through the medicine applying catheter, and then medicine is applied to the focus. And as the sealing area is sealed, the medicine cannot be diluted by being scoured by blood, so that a more ideal treatment effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a drug-eluting balloon catheter. Background Technology

[0002] Interventional medical procedures are a common treatment for ischemic diseases caused by localized stenosis or occlusion of blood vessels. Typically, a drug-eluting balloon catheter is used to deliver medication to the lesion inside the blood vessel. Drug-eluting balloon catheters are a novel therapeutic balloon drug delivery technology developed based on traditional interventional techniques such as balloon dilation or balloon angioplasty.

[0003] Existing drug-eluting balloon catheters can be found in patent application number CN202221989979.6. These balloons have a drug coating that is applied to the inner wall of the blood vessel by rubbing against the coating. However, during the drug delivery process, the blood continuously washes away and dilutes the drug, resulting in less than ideal delivery effectiveness.

[0004] Therefore, how to avoid blood flushing and diluting the medication during the application process is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a drug delivery balloon catheter to solve the technical problem of how to avoid blood flushing and dilution of drugs during drug delivery, which is an urgent issue to be addressed in the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution of this utility model includes a drug-eluting balloon catheter, which comprises:

[0007] Base tube;

[0008] A sealing assembly comprising two sealing balloons fitted onto the outer wall of the base tube, the sealing balloons having a first state of radial expansion and pressing against the inner wall of the blood vessel, and a second state of contraction and moving away from the inner wall of the blood vessel, with a sealing region between the two sealing balloons; and

[0009] The drug delivery assembly includes a drug delivery catheter that passes through the base tube and has one end connected to the sealing area to deliver drug into the sealing area.

[0010] Preferably, the drug delivery assembly further includes a drug delivery head, which is installed on the outer wall of the base tube and located between the two sealing balloons. The drug delivery catheter is connected to the drug delivery head, and the drug is introduced into the sealed area through the drug delivery head.

[0011] Preferably, the dispensing head is annular and is fitted onto the outer wall of the base tube, and the outer periphery of the dispensing head has several spray holes.

[0012] Preferably, the drug delivery assembly further includes a liquid outlet conduit, which passes through the base tube and has one end connected to the sealing area.

[0013] Preferably, the liquid outlet conduit is connected to one end of the sealed area, and the drug delivery conduit is connected to the other end of the sealed area.

[0014] Preferably, the sealing assembly further includes a liquid supply pipe that passes through the base pipe and connects the two sealing balloons, allowing liquid to be introduced into or exported from the sealing balloons so that the sealing balloons switch between the first state and the second state.

[0015] Preferably, the sealing assembly further includes a connecting pipe, which passes through the base pipe and is connected at both ends to the outer wall of the base pipe, and the two sealing balloons are located between the two ports of the connecting pipe.

[0016] Preferably, the sealing assembly further includes two connecting seats, which are installed on the outer wall of the base pipe, and the two ports of the connecting pipe are respectively connected to the two connecting seats.

[0017] Preferably, both ends of the sealing balloon have guide cone surfaces.

[0018] Preferably, the base tube is a polyurethane base tube.

[0019] Compared with existing technologies, the beneficial effects of this invention include: First, the sealing balloon is adjusted to the second state, and then the base tube is inserted into the patient's blood vessel until it reaches the lesion. Then, the sealing balloon is adjusted to the first state, causing it to expand radially and press against the inner wall of the blood vessel, thereby sealing the area. At this point, medication is introduced into the sealed area using a drug delivery catheter, thus applying medication to the lesion. Because the sealed area is closed, the medication is not diluted by blood flow, thus achieving a more ideal therapeutic effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the drug balloon catheter according to an embodiment of the present invention;

[0021] The components include a base tube 100, a sealing assembly 200, a sealing balloon 210, a liquid supply tube 220, a connecting tube 230, a connecting seat 240, a drug delivery assembly 300, a drug delivery conduit 310, a drug outlet head 320, a spray hole 321, and a liquid outlet conduit 330. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be 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 utility model and are not intended to limit the present utility model.

[0023] See also Figure 1 This utility model provides a drug-eluting balloon catheter, which belongs to the field of medical devices. It is used to deliver medication to lesions in blood vessels. By using the above-mentioned drug-eluting balloon catheter, the medication can be avoided from being diluted by blood flow during the delivery process, thereby achieving a more ideal therapeutic effect.

[0024] In some preferred embodiments, the drug delivery balloon catheter includes a base tube 100, a sealing assembly 200, and a drug delivery assembly 300. The sealing assembly 200 includes two sealing balloons 210, which are fitted onto the outer wall of the base tube 100. Each sealing balloon 210 has a first state of radial expansion and pressure against the inner wall of the blood vessel, and a second state of contraction and movement away from the inner wall of the blood vessel. A sealing region is formed between the two sealing balloons 210. The drug delivery assembly 300 includes a drug delivery catheter 310, which passes through the base tube 100, with one end connected to the sealing region for introducing drug into the sealing region.

[0025] In the above embodiment, the sealing balloon 210 is first adjusted to the second state, and then the base tube 100 is inserted into the patient's blood vessel until it reaches the lesion. Subsequently, the sealing balloon 210 is adjusted to the first state, causing it to expand radially and press against the inner wall of the blood vessel, thereby sealing the area. At this point, medication is introduced into the sealed area using the drug delivery catheter 310, thus applying medication to the lesion. Because the sealed area is closed, the medication is not diluted by blood flow, thus achieving a more ideal therapeutic effect.

[0026] In some preferred embodiments, the drug delivery assembly 300 further includes a drug delivery head 320, which is installed on the outer wall of the base tube 100 and is located between the two sealing balloons 210. The drug delivery conduit 310 is connected to the drug delivery head 320, through which the drug is introduced into the sealed area.

[0027] In the above embodiment, the drug dispensing head 320 is located between two sealed balloons 210. The drug delivery catheter 310 introduces the drug into the drug dispensing head 320 and sprays the drug onto the sealed area through the drug dispensing head 320, so that the drug adheres to the lesion.

[0028] Based on the above embodiments, in some preferred embodiments, the dispensing head 320 is annular and is sleeved on the outer wall of the base tube 100, and a plurality of spray holes 321 are opened on the outer periphery of the dispensing head 320. Since the dispensing head 320 is annular and the various spray holes 321 are distributed on the outer periphery of the dispensing head 320, the drug in the dispensing head 320 is sprayed out through the various spray holes 321, thereby allowing the drug to be sprayed within the annular area.

[0029] In some preferred embodiments, the drug delivery assembly 300 further includes a discharge conduit 330, which passes through the base tube 100 and has one end connected to the sealed area. Drug can be introduced into the sealed area via the drug delivery conduit 310, and blood and tissue fluid can be discharged from the sealed area via the discharge conduit 330 to avoid excessive pressure in the sealed area.

[0030] Based on the above embodiments, in some preferred embodiments, the discharge conduit 330 is connected to one end of the sealed area, and the medication delivery conduit 310 is connected to the other end of the sealed area. By connecting the discharge conduit 330 and the medication delivery conduit 310 to the two ends of the sealed area respectively, the blood in the sealed area can be emptied using medication during the process of discharging medication through the medication delivery conduit 310, thus minimizing the dilution and flushing of medication by residual blood.

[0031] Any implementation of the sealing balloon 210 that allows the sealing balloon 210 to freely switch between the first state and the second state is feasible. In some preferred embodiments, the sealing assembly 200 further includes a liquid supply tube 220, which passes through the base tube 100 and connects the two sealing balloons 210. The liquid supply tube 220 introduces or exports liquid into the sealing balloon 210 so that the sealing balloon 210 can switch between the first state and the second state.

[0032] In the above embodiment, by introducing liquid into the sealing balloon 210 through the liquid supply tube 220, the sealing balloon 210 can be expanded, thereby switching the sealing balloon 210 to the first state. When the liquid is extracted from the sealing balloon 210 through the liquid supply tube 220, the sealing balloon 210 can be reduced, thereby switching the sealing balloon 210 to the second state.

[0033] In some preferred embodiments, the sealing assembly 200 further includes a connecting pipe 230, which is inserted into the base pipe 100 and both ends of the connecting pipe 230 are connected to the outer wall of the base pipe 100, and two sealing balloons 210 are located between the two ports of the connecting pipe 230.

[0034] In the above embodiments, blood in the blood vessels can flow through the connecting tube 230, avoiding the drug balloon catheter from obstructing blood flow for a long time during the operation.

[0035] In some preferred embodiments, the sealing assembly 200 further includes two connecting seats 240, which are installed on the outer wall of the base tube 100. The two ports of the connecting tube 230 are respectively connected to the two connecting seats 240, so that the connecting seats 240 enable the connecting tube 230 to have good sealing performance.

[0036] In some preferred embodiments, the sealing balloon 210 has guide cones at both ends. These guide cones facilitate the passage of the drug-eluting balloon catheter within the blood vessel.

[0037] In some preferred embodiments, the base tube 100 is a polyurethane base tube 100.

[0038] When the fluid is withdrawn from the sealing balloon 210 using the supply tube 220, the sealing balloon 210 shrinks, switching to its second state. The base tube 100 is then inserted into the patient's blood vessel until it reaches the lesion. Fluid is then introduced into the sealing balloon 210 using the supply tube 220, causing it to inflate and switch to its first state. This allows the sealing balloon to expand radially and press against the inner wall of the blood vessel, effectively sealing the area. Medication is then administered into the sealed area using the drug delivery catheter 310, thus treating the lesion. Because the sealed area is closed, the medication is not diluted by blood flow, achieving a more ideal therapeutic effect.

[0039] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A drug balloon catheter, characterized by, The application relates to a drug delivery device, comprising: a base pipe; a sealing assembly comprising two sealing balloons, the sealing balloons being sleeved on the outer wall of the base pipe, the sealing balloons having a first state of being radially expanded and pressing against the inner wall of a blood vessel, and a second state of being contracted and away from the inner wall of the blood vessel, and a sealing area being formed between the two sealing balloons; and a drug delivery assembly comprising a drug delivery conduit, the drug delivery conduit being sleeved in the base pipe and one end of the drug delivery conduit being communicated with the sealing area to guide the drug into the sealing area; the drug delivery assembly further comprises a drug outlet head, the drug outlet head being arranged on the outer wall of the base pipe and located between the two sealing balloons, the drug delivery conduit being communicated with the drug outlet head to guide the drug into the sealing area through the drug outlet head.

2. The drug balloon catheter of claim 1, wherein, The drug outlet head is annular, the drug outlet head being sleeved on the outer wall of the base pipe, and a plurality of spray holes being formed on the outer periphery of the drug outlet head.

3. The drug balloon catheter of claim 1, wherein, The drug delivery assembly further comprises a liquid outlet conduit, the liquid outlet conduit being sleeved in the base pipe and one end of the liquid outlet conduit being communicated with the sealing area.

4. The drug balloon catheter of claim 3, wherein, The liquid outlet conduit is communicated with one end of the sealing area, and the drug delivery conduit is communicated with the other end of the sealing area.

5. The drug balloon catheter of claim 1, wherein, The sealing assembly further comprises a liquid supply pipe, the liquid supply pipe being sleeved in the base pipe and communicated with the two sealing balloons, the liquid supply pipe guiding the liquid into or out of the sealing balloons to switch the sealing balloons between the first state and the second state.

6. The drug balloon catheter of claim 1, wherein, The sealing assembly further comprises a communication pipe, the communication pipe being sleeved in the base pipe and both ends of the communication pipe being communicated with the outer wall of the base pipe, and the two sealing balloons being located between the two ports of the communication pipe.

7. The drug balloon catheter of claim 6, wherein, The sealing assembly further comprises two connecting seats, the connecting seats being arranged on the outer wall of the base pipe, and the two ports of the communication pipe being respectively connected to the two connecting seats.

8. The drug balloon catheter of claim 1, wherein, Both ends of the sealing balloon are provided with a guide conical surface.

9. The drug balloon catheter of claim 1, wherein, The base pipe is a polyurethane base pipe.

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