CN201182828Y - A balloon dilation catheter for dilating a lumen - Google Patents

Abstract

The utility model relates to a balloon dilatation catheter for dilating a lumen, which comprises a two-way connector, a double-cavity rod and a balloon connected in sequence, an inner tube passes through the balloon, and the balloon and the double-cavity rod One cavity of the inner tube is connected to form a pressure cavity, the pressure cavity leads to one end of the two-way connector, one end of the inner tube communicates with the other cavity of the double-lumen rod to form a guide wire cavity, and the guide wire cavity leads to the other end of the two-way connector, The other end of the inner tube passes through the end of the balloon and is connected to the tip of the catheter, which is in the shape of a circular arc cone. The utility model increases the passability of the catheter, reduces the damage to the human body lumen during the operation, and improves the tracking and pushing properties of the catheter at the same time. It can ensure that the catheter does not damage the human body lumen when it moves in the lumen. The catheter can pass through more than 98% of the narrow areas smoothly.

Description

A balloon dilation catheter for dilating a lumen

technical field

The utility model relates to the technical field of medical devices, in particular to a balloon dilation catheter for dilating a lumen.

Background technique

Interventional medicine has been clinically applied for 30 years. It is an important treatment method in cardiovascular, cerebrovascular, peripheral vascular, tumor, or non-vascular fields. One of the diagnostic techniques. Under the guidance of imaging medicine (X-ray, ultrasound, CT), through percutaneous puncture or through the original channel of the human body, a special catheter or instrument is inserted into the lesion for imaging, diagnosis and treatment. In recent years, it has developed into tumor Complicated operations such as resection and organ transplantation also use minimally invasive interventional therapy.

At present, the most widely used are cardiac interventional therapy, neurological interventional therapy, cerebrovascular interventional therapy, tumor, peripheral blood vessel and non-vascular lumen interventional therapy. It mainly inserts the balloon dilation catheter into the stenosis of the lesion through the original lumen of the human body, and under the guidance and inspection of medical imaging equipment, the balloon is expanded to expand the stenosis and restore the original shape of the human lumen. functions, such as the smooth flow of blood vessels, urinary catheters, biliary tracts, lacrimal glands, fallopian tubes, trachea, and esophagus.

Due to the limitation of structure and material, the currently used balloon dilatation catheter has poor pushability, poor ability to pass through lesions, and large size, which causes a lot of inconvenience to the operation process, especially when passing through severe stenosis. The excellent passability of the catheter is the most important thing. When the disease is diverse and complicated, the various performances of the catheter appear to be worse.

Utility model content

The purpose of the utility model is to overcome the defects of the existing balloon dilation catheter, provide an improved balloon dilation catheter for expanding the lumen of the human body, increase the passage of the catheter, and reduce the impact on the lumen of the human body during the operation. The damage of the catheter can be improved, while the tracking and pushing performance of the catheter can be improved, and the damage and bending of the catheter before surgical application can be protected.

To achieve the above object, the present invention adopts the following technical solutions:

A balloon dilation catheter for dilating a lumen, the balloon dilation catheter includes: a two-way connector connected in sequence, a double-lumen rod, and a balloon, an inner tube passes through the balloon, and the balloon It communicates with one cavity of the double-lumen rod to form a pressure cavity, and the pressure cavity leads to one end of the two-way connector, and one end of the inner tube communicates with the other cavity of the double-lumen rod to form a guide wire Lumen, the guide wire lumen leads to the other end of the two-way connector, the other end of the inner tube passes through the end of the balloon and is connected to the tip of the catheter, the tip is in the shape of an arc cone.

Wherein, the two-way connector is a tube seat with two Luer connectors, and the two Luer connectors are respectively connected with the guide wire chamber and the pressure chamber, so that the guide wire chamber leads to the tip for operation During the procedure, the pressure chamber is led to the balloon through a guide wire or the pressure in the lumen is detected for applying inflation pressure of the balloon.

Wherein, the balloon dilatation catheter further includes a balloon protection sheath and a balloon protection wire, the balloon protection sheath is sheathed on the balloon, and the balloon protection wire is inserted into the guide wire lumen from the catheter tip.

Wherein, a diffusion stress tube is sheathed on the outer wall of the double-cavity rod close to the two-way connector.

Wherein, the length of the tip is 0.5mm-10mm.

Wherein, the tip is made of nylon material, which is thermally bonded to the inner tube, and the balloon is made of nylon material, which is thermally bonded to the double-lumen rod.

Wherein, the double cavity rod is made of nylon material.

Wherein, two developing marks are fixed at both ends of the inner tube, and the developing marks are made of platinum.

Wherein, the tube base is made of polymer material, which is glued to the double-chamber rod.

Wherein, the balloon protective sheath is made of polymer material, and the balloon protective wire is made of stainless steel material.

Because the tip of the balloon catheter is provided with an arc cone-shaped tip, the utility model can increase the passability of the catheter, reduce the damage to the human body lumen during the operation, and improve the tracking and pushing properties of the catheter . It can ensure that the catheter does not damage the human body's lumen when it moves in the lumen, so that the catheter can pass through more than 98% of narrow areas smoothly.

Description of drawings

Fig. 1 is the structure diagram of the balloon dilatation catheter used for dilating the lumen of the utility model;

Fig. 2 is the partial enlarged view of I among Fig. 1;

In the figure: 1. tip; 2. developing mark; 3. balloon; 4. inner tube; 5. double-lumen rod; 6. balloon protective sleeve; 7. balloon protective wire; 8. tube seat; 9. guide Silk cavity; 10, pressure cavity; 11, diffusion stress tube.

Detailed ways

The balloon dilatation catheter for lumen dilation proposed by the utility model is described as follows in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, it is a schematic structural diagram of a balloon dilation catheter for dilating a lumen of the present invention. This balloon dilation catheter includes: a two-way connector, a double-lumen rod, and a balloon connected in sequence. In the example, the two-way connector is a tube base 8 with two Luer connectors, wherein, there is an inner tube 4 inside the balloon 3 and passes through the far end of the balloon 3, and the far end of the inner tube 4 passes through the balloon 3 The distal end is connected to the tip 1 of the catheter, the tip 1 is in the shape of an arc cone, the proximal end of the inner tube 4 communicates with a cavity in the double-lumen rod 5 and forms a guide wire cavity 9 leading to the tip 1, the guide wire The wire cavity 9 leads to one end of the tube base 8, and the proximal end of the balloon 3 is connected to the other cavity of the double-lumen rod 5 to form a pressure cavity 10 for the balloon 3 to expand, and the pressure cavity 10 is connected to the other end of the tube base 8. At one end, the two luer connectors of the tube base 8 communicate with the guide wire chamber 9 and the pressure chamber 10 respectively, so that the guide wire chamber 9 leads to the tip 1, which is used to detect the pressure in the lumen or to pass through the luer during the operation. A guide wire leads the pressure chamber 10 to the balloon 3 for applying balloon inflation pressure.

All parts of the conduit in this embodiment are sealed connections. The so-called far and near ends refer to the tube base 8 with two Luer connectors for operation, the one close to the tube base 8 is the proximal end, and the relatively far end is the far end.

In this embodiment, two developing marks 2 are fixed at both ends of the inner tube 4, and the developing marks 2 are made of platinum.

In this embodiment, a diffusion stress tube 11 is sheathed on the outer wall of the double-cavity rod 5 close to the tube base 8 .

The balloon dilatation catheter in this embodiment also includes a balloon protection sheath 6 and a balloon protection wire 7, the balloon protection sheath 6 is made of polymer material, and the balloon protection sheath 6 is set on the balloon 3, so that the balloon Avoid damage by external force before use in surgery, and ensure that the balloon does not rupture when it is inflated under high pressure. The balloon protection wire 7 is made of stainless steel, and the balloon protection wire 7 is inserted into the guide wire lumen 9 from the catheter tip 1 to prevent the balloon from being folded and compressed by external force before operation.

In this embodiment, the tip 1 in the shape of an arc cone at the distal end of the balloon dilatation catheter can increase the penetrability of the catheter, reduce the damage caused by the catheter to the lumen of the human body during the operation, and enable the catheter to pass through the lumen smoothly Lesions and tortuous parts. The tip 1 is made of nylon material and is thermally bonded with the inner tube 4; its length is generally 0.5-10 mm, preferably 2-5 mm. Balloon 3 is made of nylon material, Pebax (a kind of nylon) or polyvinyl chloride (PVC) material, and its near-end is heat-sealed connected with double-chamber rod 5, and for making sealing effect better, far-end and inner tube 4 thermal bonding. Balloons made of nylon, Pebax or PVC, after a certain process, have excellent folding memory properties. After repeated expansion and contraction, they can still maintain the original number of folded flaps, so they have good memory properties.

In this embodiment, the tube base 8 and the double-lumen rod 5 are adhesively connected, respectively communicated with the balloon inflation pressure chamber 10 of the catheter and a guide wire chamber 9 leading to the catheter tip 1, and the guide wire chamber 9 is used for passing through the catheter during the operation. The guide wire enables the catheter to reach the lesion along the guide wire, and can also be used to detect the pressure in the human body lumen. This structure conforms to the operating sequence and habits of medical staff.

In this embodiment, the inner tube 4 of the balloon dilatation catheter is made of nylon material, so that the catheter has good pushing performance, and at the same time, its tracking and supporting performance are well balanced. When the catheter is inflated under high pressure, the inner tube 4 can well maintain its shape and avoid serious deformation of the balloon. The double-cavity rod 5 is made of nylon material, so that the catheter has a shape as small as possible, but also has good pushing performance, tracking and support. When the catheter is expanded under high pressure, the double-lumen rod 5 can well maintain its shape and avoid severe deformation of the catheter. At the same time, each part of the conduit can have good thermal bonding performance. Utilizing the balloon dilatation catheter of the present invention, it can be applied to dilate human body lumens including arteries and veins of the human body.

The above embodiments are only used to illustrate the utility model, but not to limit the utility model. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the utility model. , so all equivalent technical solutions also belong to the category of the utility model, and the patent protection scope of the utility model should be defined by the claims.

Claims (10)

1. A balloon dilation catheter for dilating a lumen, characterized in that the balloon dilation catheter includes: a two-way connector, a double-lumen rod, and a balloon connected in sequence, and the inner tube is inserted into the balloon. However, the balloon communicates with a chamber of the double-lumen rod to form a pressure chamber, the pressure chamber leads to one end of the two-way connector, and one end of the inner tube is connected to the other end of the double-lumen rod. One lumen communicates to form a guide wire lumen, the guide wire lumen leads to the other end of the two-way connector, the other end of the inner tube passes through the end of the balloon and is connected to the tip of the catheter, the tip is in the shape of an arc cone body shape. 2. The balloon dilatation catheter for lumen expansion according to claim 1, wherein the two-way connector is a tube socket with two Luer connectors, and the two Luer connectors are respectively It communicates with the guide wire lumen and the pressure lumen, so that the guide wire lumen leads to the tip, which is used to pass the guide wire or detect the pressure in the lumen during the operation, and makes the pressure lumen lead to the balloon, which is used to apply the balloon inflation pressure. 3. The balloon dilation catheter for dilating a lumen according to claim 1, characterized in that, the balloon dilation catheter further comprises a balloon protection sheath and a balloon protection wire, and the balloon sheath covers the balloon On the balloon, the balloon protection wire is inserted into the lumen of the guide wire from the tip of the catheter. 4. The balloon dilation catheter for dilating a lumen according to claim 1, wherein a diffusion stress tube is sheathed on the outer wall of the double-lumen rod close to the two-way connector. 5. The balloon dilation catheter for dilating a lumen according to claim 1, wherein the length of the tip is 0.5mm-10mm. 6. The balloon dilatation catheter for lumen expansion according to claim 1, characterized in that, the tip is made of nylon material, which is thermally bonded to the inner tube, and the balloon is made of nylon material into, which is thermally bonded to the double-chamber rod. 7. The balloon dilation catheter for dilating a lumen according to claim 1, wherein the double lumen rod is made of nylon material. 8. The balloon dilatation catheter for lumen expansion according to claim 1, characterized in that two visible markers are fixed at both ends of the inner tube, and the visible markers are made of platinum. 9. The balloon dilation catheter for dilating a lumen according to claim 2, wherein the tube base is made of polymer material, and is connected with the double-lumen rod by adhesive. 10. The balloon dilatation catheter for dilating a lumen according to claim 3, wherein the balloon protection sheath is made of polymer material, and the balloon protection wire is made of stainless steel material.

Images