CN206120922U - Pipe with annular sacculus - Google Patents

Abstract

The utility model relates to the technical field of medical devices, in particular to a catheter with a ring-shaped balloon, including a catheter body and a filling catheter. The filling catheter communicates with a filling channel, and the filling channel is arranged along the axial direction of the catheter body; The filling channel communicates with a support conduit, the support conduit is evenly distributed along the circumference of the conduit body, the support conduit is provided with a side hole, the two ends of the support conduit are connected to the conduit body, and the middle part of the support conduit maintains a distance from the conduit body; The support catheter is provided with balloons, and the balloons are connected to each other to form a ring structure and surround the outer periphery of the catheter body. The beneficial effect of the utility model is that the blood vessels, especially the aorta, can be evenly expanded in the circumferential direction, and at the same time, the continuous blood flow can be maintained, and the blood flow impact due to the filling and expansion of a specific area in the blood vessels can be reduced. force, which is more conducive to the fixation of the balloon expansion position.

Description

A catheter with an annular balloon

technical field

The utility model relates to the technical field of medical instruments, in particular to a catheter with an annular balloon.

Background technique

With the improvement of people's living standards and the aging population structure, the incidence of vascular system diseases and the disability and mortality rates are increasing year by year. Taking aortic dissection as an example, the traditional surgical treatment is thoracotomy and/or laparotomy, and replacement of the diseased aorta with artificial blood vessels often requires extracorporeal circulation, which involves large trauma, blood loss, and high complication rate and mortality.

At present, endovascular exclusion of aortic dilatational disease has been carried out, that is, a minimally invasive method is used to seal the dissection breach or isolate the aortic aneurysm by inserting an endovascular graft into the blood vessel cavity, so as to achieve the purpose of treatment. The said vascular endoluminal isolation graft is composed of a tubular wire stent and an artificial blood vessel sutured or bonded inside the stent, and the tubular wire stent is formed of a straight tube surrounded by an elastic metal wire folded in a Z shape. The artificial blood vessel is made of artificial blood vessel membrane material, and the artificial blood vessel membrane material is usually polyester (polyethylene terephthalate, English name polyethyleneterephthalate, referred to as PET). When in use, the intravascular isolation graft is compressed and loaded into the delivery device. The delivery device sends it to the aortic aneurysm through the distant femoral artery or iliac artery and then releases it. Due to the elastic force of the wire stent, it automatically returns to a straight line Tubular and close to the inner wall of the aorta, the lesion is isolated from the blood flow, thus achieving the purpose of treatment. This method does not require open surgery, is simple and minimally invasive, has definite curative effects, and has successfully treated a large number of patients. Due to the irregular anatomical shape of the patient's diseased blood vessels, there are often complex deformations such as distortion, angulation, stenosis, and calcification. After the stent is released, it is difficult to expand to the best shape by itself, and often cannot be completely attached to the arterial wall, and stent deployment may also occur. Incomplete, folded, and distorted phenomena can lead to complications such as endoleak and distal blood perfusion insufficiency. At this time, the expansion and shaping of the stent by the balloon catheter becomes a necessary step, which can keep the endoluminal graft in good shape in the vessel cavity and improve the therapeutic effect of endoluminal exclusion.

However, the existing balloons used to expand and shape the aortic endoluminal graft after release are mainly single-leaf compliant balloons, which will completely block the blood vessel while expanding and shaping the stent, resulting in interruption of distal blood flow. The occlusion also causes the pulsatile impact force of the blood flow to act directly on the balloon, causing the balloon to dislodge. Another existing three-lobe compliant balloon has a small contact surface with the arterial wall after expansion, requiring more than three repeated expansions. At the same time, blood flow can pass through the gap between the balloons after the balloon is expanded, but it can pass through the gap between the balloons. The flow rate is limited, and it still affects the distal blood perfusion and bears a large blood flow impact, especially in the ascending aorta and thoracic aorta. Therefore, it is necessary to develop a new balloon to solve this problem. A hollow straight tubular balloon can not only quickly and uniformly shape the graft, but also maintain the continuous blood flow at the distal end, and reduce the difficulty and risk of operation caused by the impact of pulsating blood flow.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a vascular catheter that maintains continuous blood flow while expanding and shaping the vascular lumen.

In order to achieve the above purpose, the utility model provides a catheter with an annular balloon, including a catheter body and a filling catheter, the filling catheter communicates with a filling channel, and the filling channel is arranged along the axial direction of the catheter body;

The filling channel communicates with a support conduit, the support conduit is evenly distributed along the circumference of the conduit body, the support conduit is provided with side holes, the two ends of the support conduit are connected to the conduit body, and the middle part of the support conduit maintains a distance from the conduit body;

The support catheter is provided with balloons, and the balloons are connected to each other to form a ring structure and surround the periphery of the catheter body. Each balloon communicates with the corresponding support catheter through a side hole. The balloon Keep away from the catheter body. The balloon is connected with the support catheter with a certain hardness by thermal pressing or light-curing material bonding. The length of the catheter main body is 100-140cm, the outer diameter is 8-12F, and the inner diameter is 0.035inch. During operation, the guide wire can pass through the vascular catheter. After the catheter body is pushed to the target site along the guide wire, gas or liquid can be filled from the inflation catheter. In the capsule, the purpose of expansion and shaping is achieved. At the same time, since the distance between the support catheter and the balloon and the catheter body is maintained, a space for continuous blood flow is formed. Therefore, the blood flow is not blocked during the expansion and shaping process. flow. The material of the balloon is nylon polymer, biomedical degradable polymer, natural fiber material or a mixture thereof. The outer surface of the balloon is coated with a hydrophilic coating, and the hydrophilic coating may have one or more of carboxylic acid groups, sulfonic acid groups, sulfuric acid groups, amino groups, quaternary amino groups and ether functional groups . Several balloons form a multi-leaf balloon structure, and the definition of the multi-leaf balloon is that an annular cavity is separated by a septum to form a "multi-leaf" shape. The support catheter communicates with the balloon through the side hole, and the straight tubular structure formed as a whole by the balloon is coaxial and parallel to the catheter body. During operation, the guide wire can pass through the vascular catheter. After the catheter body is pushed to the target site along the guide wire, gas or liquid can be filled from the inflation catheter. In the capsule, multiple balloons are expanded evenly at the same time. The length of the balloon after inflation is 20-60mm, the inner diameter is 10-30mm, and the thickness is 3-6mm.

Preferably, said inflation channel is provided in the wall of said catheter body. The support catheter is issued from the catheter body and connected with the filling channel in the catheter body.

Preferably, a developing marking point is provided on the catheter body close to the supporting catheter;

The connection between the support catheter and the balloon is also provided with developing marking points. The developing marking point can display the specific position of the balloon during the process of pushing the vascular catheter, so as to facilitate the accurate positioning of the balloon.

Preferably, the number of the support conduits is 3-6, and the number of side holes on each support conduit is 1-3.

The length of the support conduit is 30-70mm. The outer diameter of the support conduit after being inflated is 2.5-3.5F.

The beneficial effect of the utility model is that the blood vessels, especially the aorta, can be evenly expanded in the circumferential direction, and at the same time, the continuous blood flow can be maintained, and the blood flow impact due to the filling and expansion of a specific area in the blood vessels can be reduced. force, which is more conducive to the fixation of the balloon expansion position. Compared with the existing three-leaf balloon, the blood flow is larger, less affected by the impact of blood flow, and the contact surface is larger after expansion without multiple expansions.

Description of drawings

Fig. 1 is a sectional view of the utility model;

Fig. 2 is the right view of the utility model;

Fig. 3 is a structural schematic diagram of the utility model.

in:

1-Body 2-Inflation catheter 3-Inflation channel

4-support catheter 41-side hole 5-balloon

6-Development markers

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

Example 1:

A catheter with an annular balloon, comprising a catheter body 1 and an inflation catheter 2, the inflation catheter 2 communicates with an inflation channel 3, and the inflation channel 3 is arranged along the axial direction of the catheter body 1;

The filling channel 3 communicates with the support conduit 4, which is evenly distributed along the circumference of the conduit body 1, and the support conduit 4 is provided with side holes 41, and the two ends of the support conduit 4 are connected to the conduit body 1, supporting The middle part of the conduit 4 keeps a distance from the conduit body 1;

The support catheter 4 is provided with balloons 5, the balloons 5 are connected to each other to form a ring structure, and surround the outer periphery of the catheter body 1, each balloon 5 communicates with the support catheter 4 through a side hole 41, The balloon 5 is kept at a distance from the catheter body 1 .

The filling channel 3 is arranged in the wall of the catheter body 1 .

The catheter body 1 is provided with a developing marking point 6 near the supporting catheter 4;

A developing marking point 6 is also provided at the joint between the support catheter 4 and the balloon 5 .

The number of the support conduits 4 is 3-6, and the number of side holes 41 on each support conduit 4 is 1-3.

The length of the support conduit is 30-70mm.

When in use, according to the location of the target aorta and the corresponding inner diameter of the artery, select a vascular catheter of appropriate specifications. After the accurate positioning of the developing marker point, push it to the target site, and inject a certain pressure of gas or liquid (can be physiological saline mixed with contrast agent) into the filling catheter to make the balloon inflate and inflate evenly, so as to realize the aortic For the purpose of circumferential expansion and shaping.

The preferred embodiments of the utility model creation have been specifically described above, but the utility model creation is not limited to the described embodiments, and those skilled in the art can also make Various equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (5)

1. A catheter with an annular balloon, comprising a catheter body (1) and a filling catheter (2), characterized in that the filling catheter (2) communicates with a filling channel (3), and the filling channel (3) is set arranged along the axial direction of the catheter body (1); The filling channel (3) communicates with the support conduit (4), and the support conduit (4) is uniformly distributed along the circumference of the conduit body (1), and the support conduit (4) is provided with a side hole (41), and the support conduit (4) The two ends of (4) are connected to the conduit body (1), and the middle part of the support conduit (4) maintains a distance from the conduit body (1); The support catheter (4) is provided with balloons (5), and the balloons (5) are connected to each other to form a ring structure, and surround the outer periphery of the catheter body (1), each balloon (5) They are respectively communicated with corresponding support catheters (4) through side holes (41), and the balloon (5) is kept at a distance from the catheter body (1). 2. The catheter with annular balloon according to claim 1, characterized in that, the filling channel (3) is arranged in the wall of the catheter body (1). 3. The catheter with an annular balloon according to claim 1, characterized in that, the catheter body (1) is provided with a developing marking point (6) near the supporting catheter (4); A developing marking point (6) is also provided at the junction of the support catheter (4) and the balloon (5). 4. The catheter with annular balloon according to claim 1, characterized in that, the number of said supporting catheters (4) is 3-6, and the side hole (41) on each supporting catheter (4) ) is 1-3. 5. The catheter with annular balloon according to claim 1, characterized in that, the length of the supporting catheter (4) is 30-70 mm.