CN211584834U - Double-balloon catheter - Google Patents

Abstract

The utility model provides a two sacculus pipes has following beneficial effect: (1) the application avoids the dependence on the drug coating, can be suitable for various drug solutions, including pure drug solutions, drug solutions containing polymer carriers, and the concentration of the drug solutions is not limited. (2) The application is that local administration and release medicine are to the vascular wall, and controllable high concentration medicine promotes the blood vessel to absorb more medicine. (3) The application adopts the double-saccule combined drug controlled release to solve the problem of dependence on a drug coating, can control the drug dosage acting on local parts, avoids redundant drugs from flowing to a far end, does not have a falling coating, and reduces thrombosis.

Description

Double-balloon catheter

Technical Field

The present application relates to a double-balloon catheter, and more particularly to a controlled drug release double-balloon catheter for treating vascular disease.

Background

In recent years, with the rapid development of neurosmagraphy, catheter technology and materials, computers and other sciences, intravascular interventional techniques are becoming mature in the aspect of treating vascular diseases, and are determined by doctors and patients on the basis of the characteristics of minimal invasion, safety, effectiveness and the like, so that the intravascular interventional techniques are one of the important methods for treating vascular diseases at present.

In the interventional therapy mode, a balloon catheter is needed, the balloon catheter is a tool for intravascular angioplasty, the balloon is sent to an atherosclerotic and stenotic part through a guide wire and a guide catheter, the balloon is expanded by pressure, plaques are cracked, blood vessels are expanded, and blood flow is improved, so that the method is a novel effective technology for treating cardiovascular diseases in recent years. However, 30-40% of patients after angioplasty have restenosis due to vascular endothelial injury, smooth muscle cell hyperproliferation, and lack of support by dilated vessels. On the basis, the technology of the intravascular stent treatment is developed. This technique is to install a metal mesh stent on the outside of a balloon, deliver the stent tube to the lesion site through a balloon catheter, and permanently insert the stent into the intima of the coronary artery of a patient after the balloon is expanded, but there is still about 10-20% of patients' blood vessels that undergo stent restenosis after stent expansion due to smooth muscle proliferation caused by immune reaction of the human body. Since the stent is permanently embedded in the intima of the coronary artery of the patient, it is not possible to remove the implanted stent and perform a second stent implantation. In order to solve the problem of blood vessel stenosis caused by stent implantation, a drug-loaded stent is rapidly a main means of cardiovascular stent implantation treatment technology in recent years. Because the surface of the metal stent is coated with a layer of medicine for inhibiting the growth of smooth muscle, the restenosis rate of a patient after operation can be reduced to below 5 percent. However, compared to the conventional bare stent without drug loading, the drug-loaded stent is very expensive and some patients may develop thrombus to cause serious adverse reactions due to the influence of the polymer material on the drug-loaded coating.

To solve the above problems, balloon catheters with drug coatings have been developed. The balloon catheter is characterized in that a medicine with a therapeutic effect is coated on the outer surface of a balloon, namely a medicine coating is formed on the outer wall of the balloon. When the saccule reaches the pathological change part in the blood vessel, the saccule expands to make the medicine coating on the surface contact with the inner wall of the blood vessel. The medicine is released and acts on the pathological change part, thereby achieving the purpose of treating and preventing the restenosis in the blood vessel. Even if the blood vessel of the patient is narrowed and blocked, the drug-carrying balloon catheter can be used for secondary treatment again.

Although drug-coated balloon catheters have a positive therapeutic effect, users find in practice: in the process that the saccule with the medicine sprayed on the surface enters the blood vessel, the medicine on the surface of the saccule can fall off due to friction with the inner wall of the blood vessel, so that the medicine cannot be completely delivered to a diseased part by the medicine saccule. How to coat the medicine on the outer surface of the balloon as much as possible and how to keep the medicine from being washed and lost by blood in a blood vessel in the process of conveying the balloon to a lesion part through a catheter become the technical problem, and no better solution is provided at present.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will be solved provides a two sacculus pipes.

In order to solve the technical problem, the application provides a double-balloon catheter, which comprises an inner tube, an outer tube, a feeding tube, a proximal balloon, a distal balloon, a medicine feeding catheter seat and a balloon pressure charging and discharging catheter seat, wherein the outer tube is positioned in the feeding tube, the distal end of the outer tube extends out of the distal end of the feeding tube, the proximal end of the outer tube is connected to the balloon pressure charging and discharging catheter seat, a pressure charging and discharging port of the balloon pressure charging and discharging catheter seat is communicated with an inner cavity of the outer tube, the proximal end of the feeding tube is connected to the medicine feeding catheter seat, and a medicine feeding port of the medicine feeding catheter seat is communicated with a gap between the feeding tube and the outer tube; the inner tube is positioned in the outer tube, the far end of the inner tube extends out of the far end of the outer tube, the near end of the inner tube penetrates through the side walls of the outer tube and the feeding tube to form an RX port communicated with the outside, the RX port is used for a guide wire to pass through, the near end and the far end of the near end balloon are connected to the outer wall of the feeding tube, a gap between the inner tube and the outer tube is communicated with the inner cavity of the near end balloon through a near end balloon inflation and decompression hole, the near end of the far end balloon is connected with the far end of the outer tube, the far end of the far end balloon is connected to the outer wall of the inner tube, a liquid medicine feeding hole is formed in the tube wall of the feeding tube, and the liquid medicine feeding hole is positioned between the near end balloon and the far end balloon.

Preferably, the inner tube is provided with a first developing ring and a second developing ring, the first developing ring is positioned in the far-end saccule, and the second developing ring is positioned in the near-end saccule.

Preferably, the distal end of the inner tube is provided with a tip.

Preferably, the distal end of the feeding tube is attached to the outer wall of the outer tube.

Preferably, the distal end of the feeding tube is connected with the outer wall of the outer tube by welding or adhesive bonding.

Preferably, the outer tube and the feeding tube are connected at the proximal balloon inflation and deflation hole through welding or gluing.

Preferably, the inner tube, the outer tube and the feeding tube are connected at the RX port by welding or gluing.

The utility model provides a two sacculus pipes has following beneficial effect:

(1) the application avoids the dependence on the drug coating, can be suitable for various drug solutions, including pure drug solutions, drug solutions containing polymer carriers, and the concentration of the drug solutions is not limited.

(2) The application is that local administration and release medicine are to the vascular wall, and controllable high concentration medicine promotes the blood vessel to absorb more medicine.

(3) The application adopts the double-saccule combined drug controlled release to solve the problem of dependence on a drug coating, can control the drug dosage acting on local parts, avoids redundant drugs from flowing to a far end, does not have a falling coating, and reduces thrombosis.

Drawings

FIG. 1 is a schematic view of the structure of a double balloon catheter of the present application.

Wherein: 1. a tip; 2. a first developing ring; 3. a distal balloon; 4. a liquid medicine feed hole; 5. A proximal balloon; 6. a pressure charging and releasing hole; 7. a second developing ring; 8. an RX port; 9. a medicine inlet catheter seat; 10. the balloon is filled with a pressure relief catheter seat; 11. a feed tube; 12. an outer tube; 13. an inner tube; 14. A first bond; 15. and a second bond.

Detailed Description

The present application is further described below in conjunction with the following figures and specific examples to enable those skilled in the art to better understand the present application and to practice it, but the examples are not intended to limit the present application.

As shown in fig. 1, a double-balloon catheter of the present application comprises an inner tube 13, an outer tube 12, a feeding tube 11, a proximal balloon 5, a distal balloon 3, a drug feeding catheter holder 9 and a balloon pressure-charging and-discharging catheter holder 10, wherein the outer tube 12 is located inside the feeding tube 11, the distal end of the outer tube 12 extends out from the distal end of the feeding tube 11, the proximal end of the outer tube 12 is connected to the balloon pressure-charging and-discharging catheter holder 10, a pressure-charging and-discharging port of the balloon pressure-charging and-discharging catheter holder 10 is communicated with an inner cavity of the outer tube 12, the proximal end of the feeding tube 11 is connected to the drug feeding catheter holder 9, and a drug feeding port of the drug feeding catheter holder 9 is communicated with a gap between the feeding tube 11 and the outer tube 12; the inner tube 13 is positioned inside the outer tube 12, the distal end of the inner tube 13 extends from the distal end of the outer tube 12, the proximal end of the inner tube 13 passes through the side walls of the outer tube 12 and the feeding tube 11 to form an RX port 8 communicating with the outside, the RX port 8 is used for leading a guide wire to pass through, the proximal end and the distal end of the proximal balloon 5 are connected on the outer wall of the feeding tube 11, the gap between the inner tube 13 and the outer tube 12 is communicated with the inner cavity of the near-end saccule 5 through a near-end saccule 5 inflation and decompression hole 6, the proximal end of the distal balloon 3 is connected with the distal end of the outer tube 12, the distal end of the distal balloon 3 is connected with the outer wall of the inner tube 13, the tube wall of the feeding tube 11 is provided with a liquid medicine feeding hole 4, and the liquid medicine feeding hole 4 is positioned between the near-end balloon 5 and the far-end balloon 3. Inner tube 13 on be equipped with first developing ring 2 and second developing ring 7, first developing ring 2 be located distal end sacculus 3 in, second developing ring 7 be located proximal end sacculus 5 in. The distal end of the inner tube 13 is provided with a tip 1. The distal end of the feeding tube 11 is connected to the outer wall of the outer tube 12.

The preparation method of the double-balloon catheter comprises the following steps:

the distal end of the feeding tube 11 is punched to form a liquid medicine feeding hole 4; the distal end of the feeding tube 11 is connected with the outer tube 12 through welding or gluing, and the feeding tube 11 and the outer tube 12 are cut, welded or glued to form a proximal balloon 5 inflation and decompression hole 6; the outer tube 12 is connected with the near end of the far end balloon 3 by welding or gluing, and the feeding tube 11 is connected with the two ends of the near end balloon 5; pressing a mark developing ring on the outer surface of the inner pipe 13 to prepare a first developing ring 2 and a second developing ring 7; the inner tube 13 with the mark developing ring which is molded is connected with the far end of the far end saccule 3 by welding or gluing; cutting and preparing an RX port 8 by welding or gluing; preparing a catheter tip 1 by welding; the catheter hub and the feed tube 11, the catheter hub and the outer tube 12 are connected by welding or gluing, forming a first bond 14, a second bond 15.

The application relates to a double-balloon catheter, which comprises the following use steps:

after the stenotic blood vessel is pretreated by a balloon, a guide wire passes through the tip end 1 of the catheter and an RX port 8, and the catheter enters the blood vessel through the guide wire; under the X-ray, the lesion position is accurately reached according to the development of the first developing ring 2 and the second developing ring 7, and the lesion position is between the first developing ring 2 and the second developing ring 7; injecting contrast agent or normal saline into the balloon through the balloon inflating and decompressing catheter seat 10, and plugging the proximal end and the distal end of the blood vessel at the lesion position after the balloon is inflated; the medicine solution is injected through the medicine inlet catheter base 9, the medicine liquid is injected into the blood vessel at the pathological change position through the medicine liquid feeding hole 4, and the blood vessel absorbs the medicine; before withdrawing the catheter, the redundant liquid medicine in the blood vessel is firstly sucked, then the saccule is decompressed, and finally the catheter is withdrawn along the guide wire.

The above-described embodiments are merely preferred embodiments for fully illustrating the present application, and the scope of the present application is not limited thereto. The equivalent substitution or change made by the person skilled in the art on the basis of the present application is within the protection scope of the present application. The protection scope of this application is subject to the claims.

Claims (7)

1. A double-balloon catheter is characterized by comprising an inner tube, an outer tube, a feeding tube, a near-end balloon, a far-end balloon, a medicine feeding catheter seat and a balloon pressure charging and releasing catheter seat,

the outer tube is positioned in the feeding tube, the distal end of the outer tube extends out of the distal end of the feeding tube,

the near end of the outer tube is connected to the balloon pressure charging and discharging catheter base, a pressure charging and discharging port of the balloon pressure charging and discharging catheter base is communicated with the inner cavity of the outer tube,

the proximal end of the feeding tube is connected to the medicine inlet catheter base, and the medicine inlet of the medicine inlet catheter base is communicated with the gap between the feeding tube and the outer tube;

the inner tube is positioned in the outer tube, the distal end of the inner tube extends out of the distal end of the outer tube, the proximal end of the inner tube penetrates through the side walls of the outer tube and the feeding tube to form an RX port communicated with the outside, the RX port is used for leading a guide wire to pass through,

the near end and the far end of the near end saccule are connected on the outer wall of the feeding tube, the gap between the inner tube and the outer tube is communicated with the inner cavity of the near end saccule through a near end saccule pressure charging and discharging hole,

the proximal end of the distal balloon is connected with the distal end of the outer tube, the distal end of the distal balloon is connected with the outer wall of the inner tube,

the tube wall of the feeding tube is provided with a liquid medicine feeding hole which is positioned between the near-end balloon and the far-end balloon.

2. A double-balloon catheter as in claim 1 wherein the inner tube has a first visualization ring and a second visualization ring, the first visualization ring being located within the distal balloon and the second visualization ring being located within the proximal balloon.

3. A double-balloon catheter as in claim 1 wherein the distal end of the inner tube is provided with a tip.

4. A double balloon catheter as in claim 1, wherein the distal end of the feeding tube is attached to the outer wall of the outer tube.

5. A double balloon catheter according to claim 4, wherein the distal end of the feeding tube is connected to the outer wall of the outer tube by welding or adhesive bonding.

6. A double-balloon catheter as in claim 1, wherein said outer tube and said feeding tube are welded or adhesively attached at said proximal balloon inflation/deflation port.

7. A double balloon catheter as in claim 1 wherein said inner tube, outer tube and feed tube are joined at said RX port by welding or adhesive.

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