Drug delivery balloon dilatation catheter

Abstract

The utility model discloses a drug delivery balloon dilatation catheter, which belongs to the technical field of interventional medical instruments and comprises a catheter seat, a push rod, an outer tube, an inner tube, a drug delivery cavity, a balloon, a developing ring and a head end, the catheter seat comprises an inflation port and a drug delivery port, and the push rod is connected with the outer tube, the drug delivery cavity and the catheter seat to facilitate inflation and drug delivery of the balloon. The administration cavity is communicated with the administration opening of the catheter seat, the inner tube is welded in the outer tube and is used for bringing the product into a diseased region by a guide wire, the head end is connected with the balloon and the inner tube, and the soft head end cannot cause injury to blood vessels. The drug delivery balloon dilatation catheter provided by the utility model reaches a lesion site under the guidance of the guide wire, carries out inflation dilatation on the balloon, treats lesion stenosis and calcification, can inject drugs into a blood vessel and treats lesion, and the filled balloon can block the blood vessel and prevent rapid loss of the drugs; balloon dilatation can be guaranteed, and medicine treatment can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of interventional medical devices, in particular to a drug-delivery balloon dilatation catheter. Background Art

[0002] In recent years, with the rise of drug-eluting balloons and drug-eluting stents, the treatment of vascular hyperplasia and calcified stenosis lesions has entered the fast lane in cardiac intervention and peripheral intervention surgeries. In particular, drug-eluting balloons avoid the implantation of foreign bodies in the human body during treatment and can directly inhibit intimal hyperplasia to achieve a therapeutic effect.

[0003] The existing drug balloon dilatation catheter sprays the drug on the balloon surface, then folds the balloon, delivers the balloon to the lesion site through the guidewire catheter, and then inflates the balloon to expand. During the expansion period, the drug is released and adheres to the inner wall of the blood vessel to achieve the effect of dilating the blood vessel and treating stenosis. The existing drug balloon spraying and folding process is difficult to completely wrap and release the drug. Before it is delivered to the lesion site, part of the drug has dissolved in the blood, causing loss and affecting the drug treatment effect. In this way, the utilization rate of the drug coating will decrease and affect the drug delivery effect. The drug in the existing drug balloon is in irregular states such as flakes and particles. If it enters the human body and is not quickly dissolved and released, it will cause local vascular embolism and cause harm to the human body. Utility Model Content

[0004] The utility model aims to provide a drug-administering balloon dilatation catheter to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drug-delivery balloon dilatation catheter, comprising a catheter seat, a push rod, an outer tube, an inner tube, a drug-delivery cavity, a balloon, a developing ring and a head end, characterized in that a push rod is provided on one side of the catheter seat, an outer tube is provided on one side of the push rod, an inner tube is fixedly provided inside the outer tube, a drug-delivery cavity is provided at the bottom of the outer tube, a balloon is fixedly sleeved on the outer wall of one side of the inner tube, a developing ring is provided inside the inner tube, a head end is provided on one side of the inner tube, an inflation port is provided on the other side of the catheter seat, and the inflation port is connected to the interior of the catheter seat, and a drug-delivery port is provided at the bottom of the catheter seat, and the drug-delivery port is connected to the interior of the catheter seat.

[0006] As a further solution of the utility model: one end of the drug delivery cavity is connected to the drug delivery port, the other end of the drug delivery cavity is provided with a drug release hole, and the drug release hole is connected to the inside of the drug delivery cavity, and the drug delivery cavity is connected to the outer tube by fusion / bonding / welding.

[0007] As a further solution of the utility model: the material of the push rod is nickel-titanium alloy or stainless steel metal material, the surface of the push rod is coated with a lubricating coating, and the lubricating coating can be a polytetrafluoroethylene coating / polyethylene coating / polypropylene coating / polyurethane coating / polyamide coating.

[0008] As a further solution of the utility model: the outer tube, the inner tube and the balloon are connected by fusion / bonding / welding.

[0009] As a further solution of the utility model: a guide wire exchange port is provided on the inner tube.

[0010] As a further solution of the utility model: the head end is made of soft material.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model provides a drug-delivery balloon dilatation catheter, and the catheter seat includes an inflation port and a drug-delivery port. The push rod is connected with the outer tube, the drug-delivery cavity and the catheter seat, so as to facilitate balloon inflation and drug-delivery. The drug-delivery cavity is connected with the drug-delivery port on the catheter seat. An inner tube is welded inside the outer tube, and the guide wire is used to bring the product into the diseased part. The soft head end will not cause damage to the blood vessel. A developing ring is provided on the inner tube, and the required position of the balloon in the blood vessel can be confirmed under X-ray fluoroscopy. During use, the drug-delivery balloon dilatation catheter reaches the diseased part under the guidance of the guide wire, inflates and expands the balloon, and treats stenosis and calcification of the disease. At the same time, drugs can be injected into the blood vessel to treat the disease. The filled balloon can block the blood vessel and prevent the rapid loss of drugs. The balloon expansion can be ensured and drug treatment can be performed, thereby reducing the operation time and saving the patient's treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the partial structure of the inner tube and the drug delivery cavity of the utility model;

[0015] Figure 3 It is a side view schematic diagram of the partial structure of the utility model.

[0016] In the figure: 1. catheter seat; 1-1. inflation port; 1-2. drug delivery port; 2. push rod; 3. outer tube; 4. inner tube; 4-1. guide wire exchange port; 5. drug delivery cavity; 5-1. drug release hole; 6. balloon; 7. developing ring; 8. head end. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-3, the utility model provides an embodiment: a drug delivery balloon dilatation catheter, including a catheter seat 1, a push rod 2, an outer tube 3, an inner tube 4, a drug delivery cavity 5, a balloon 6, a developing ring 7 and a head end 8, an inflation port 1-1 is provided on the other side of the catheter seat 1, and the inflation port 1-1 is connected to the interior of the catheter seat 1, a drug delivery port 1-2 is provided at the bottom of the catheter seat 1, and the drug delivery port 1-2 is connected to the interior of the catheter seat 1, one end of the drug delivery cavity 5 is connected to the drug delivery port 1-2, and a drug release hole 5-1 is provided at the other end of the drug delivery cavity 5, and the drug release hole 5-1 is connected to the interior of the drug delivery cavity 5, the drug delivery cavity 5 is connected to the outer tube 3 by fusion / bonding / welding, a push rod 2 is provided on one side of the catheter seat 1, the push rod 2 is made of metal materials such as nickel-titanium alloy or stainless steel, the surface of the push rod 2 is coated with a lubricating coating, and the lubricating coating can be a polytetrafluoroethylene coating / polyethylene coating / polypropylene coating / polyurethane coating / polyamide coating;

[0023] Specifically, Figure 1 As shown, when in use, a catheter seat 1 is provided, and the material of the catheter seat 1 is a thermoplastic plastic material, and the material can be polyethylene / polypropylene / polycarbonate / polyurethane and the like. The material has the characteristics of low cost, good mechanical properties, corrosion resistance, sterility and harmlessness to the human body. It is bonded to the push rod 2 with medical glue, and the bonding is firm and not easy to fall off. A push rod 2 is provided, and the push rod 2 is preferably made of metal materials such as nickel-titanium alloy and stainless steel, has a certain elasticity, and can provide a good pushing force. The surface of the push rod 2 is coated with a lubricating coating, mainly using polytetrafluoroethylene or polyvinyl pyrrolidone, which is used to reduce the friction generated when the push rod 2 enters or withdraws from the human body.

[0024] An outer tube 3 is arranged on one side of the push rod 2, an inner tube 4 is fixedly arranged inside the outer tube 3, a guide wire exchange port 4-1 is opened on the inner tube 4, a drug delivery cavity 5 is arranged at the bottom of the outer tube 3, a balloon 6 is fixedly sleeved on the outer wall of one side of the inner tube 4, the outer tube 3, the inner tube 4 and the balloon 6 are connected by fusion / bonding / welding, a developing ring 7 is arranged inside the inner tube 4, a head end 8 is arranged on one side of the inner tube 4, and the head end 8 is made of soft material;

[0025] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when in use, the outer tube 3, the inner tube 4 and the balloon 6 are connected by melting / bonding / welding and other processes, the connection is firm and will not fall off, the balloon 6 can withstand the rated bursting pressure and will not cause harm to the human body. The developing ring 7 is provided, and the developing ring 7 is respectively fixed on the inner tube 4 and located at the two ends of the balloon 6. The position reached by the balloon 6 can be accurately located under X-rays.

[0026] Working principle: In the present application, the catheter seat 1 is bonded to the push rod 2 as a whole, and the drug delivery cavity 5 enters the drug delivery port 1-2 through the push rod 2. The drug delivery cavity 5 is attached to the outer tube 3 as a whole, and the drug delivery port 1-2 is left on the surface to facilitate the drug to enter the human blood vessel after injection. The developing ring 7 is fixed to the inner tube 4 by means of fusion / bonding / welding / riveting, etc. The guide wire exchange port 4-1 is used for the guide wire to quickly enter and guide the balloon 6 into the lesion position, and the developing ring 7 is used for precise positioning. During use, an inflation pressure pump is used to inflate the inflation port 1-1 in the catheter seat 1, and the balloon 6 is filled and expanded to expand the blood vessel, and then the drug delivery port 1-2 is used to inject the drug. During the drug injection process, the balloon 6 is filled and attached to the inner wall of the blood vessel, and the blood flow is temporarily blocked, which is beneficial to protect the drug from being quickly dispersed by the blood flow, and ensure the therapeutic effect of drug delivery. In actual use, the present embodiment has the functions of both expansion and drug delivery, and can deliver drugs to the same part or multiple parts once or multiple times, reducing time and surgical costs.

[0027] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0028] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above are only preferred implementation methods of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A drug delivery balloon dilatation catheter, comprising a catheter seat (1), a push rod (2), an outer tube (3), an inner tube (4), a drug delivery cavity (5), a balloon (6), a developing ring (7) and a tip (8), characterized in that: A push rod (2) is provided on one side of the catheter seat (1), an outer tube (3) is provided on one side of the push rod (2), an inner tube (4) is fixedly provided inside the outer tube (3), a drug delivery cavity (5) is provided at the bottom of the outer tube (3), a balloon (6) is fixedly sleeved on the outer wall of one side of the inner tube (4), a developing ring (7) is provided inside the inner tube (4), a head end (8) is provided on one side of the inner tube (4), an inflation port (1-1) is provided on the other side of the catheter seat (1), and the inflation port (1-1) is communicated with the inside of the catheter seat (1), and a drug delivery port (1-2) is provided at the bottom of the catheter seat (1), and the drug delivery port (1-2) is communicated with the inside of the catheter seat (1).

2. A drug delivery balloon dilatation catheter according to claim 1, characterized in that: One end of the drug delivery cavity (5) is connected to the drug delivery port (1-2), and the other end of the drug delivery cavity (5) is provided with a drug release hole (5-1), and the drug release hole (5-1) is connected to the interior of the drug delivery cavity (5), and the drug delivery cavity (5) is connected to the outer tube (3) by fusion / adhesion / welding.

3. The drug delivery balloon dilatation catheter according to claim 1, characterized in that: The push rod (2) is made of nickel-titanium alloy or stainless steel metal material, and the surface of the push rod (2) is coated with a lubricating coating, and the lubricating coating can be a polytetrafluoroethylene coating / polyethylene coating / polypropylene coating / polyurethane coating / polyamide coating.

4. The drug delivery balloon dilatation catheter according to claim 1, characterized in that: The outer tube (3), the inner tube (4) and the balloon (6) are connected by fusion / adhesion / welding.

5. The drug delivery balloon dilatation catheter according to claim 1, characterized in that: The inner tube (4) is provided with a guide wire exchange port (4-1).

6. The drug delivery balloon dilatation catheter according to claim 1, characterized in that: The head end (8) is made of soft material.

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