CN106725696B - A double balloon catheter for blocking the blood flow of the common iliac artery - Google Patents

Abstract

The present invention is a double balloon catheter for blocking the blood flow of the common iliac artery, comprising: a catheter body, a distal balloon, a proximal balloon, a developing ring, a catheter reinforcement and a catheter seat. The tube and the outer tube are composed, the tip is connected with the distal end of the inner tube, the inner tube is located inside the outer tube, the guide wire channel is formed inside the inner tube, the area between the inner tube and the outer tube forms the liquid injection channel, and the distal end of the liquid injection channel is connected to the outer tube. The distal balloon communicates with the proximal balloon through the liquid injection hole. The distal balloon and the proximal balloon are spaced apart along the length of the catheter body, and the catheter body passes through the distal balloon and the proximal balloon. The proximal ends of the inner tube and the outer tube pass through the middle of the catheter reinforcement and are connected with the catheter seat; the main joint at the end of the catheter seat is communicated with the guide wire channel, and the auxiliary connector at the end of the catheter seat is communicated with the liquid injection channel. The invention can guide into the human body's common iliac artery without using a guide wire, simplifies the process of the common iliac artery occlusion operation, and reduces the difficulty of the operation.

Description

A double balloon catheter for blocking the blood flow of the common iliac artery

technical field

The invention relates to the field of medical devices, in particular to a double balloon catheter for blocking the blood flow of the common iliac artery.

Background technique

In sacrococcygeal malignancy or placenta previa surgery, blood flow to the common iliac artery is often blocked. At present, the commonly used clinical practice is to deliver a balloon catheter to the abdominal aorta through interventional surgery and dilate, thereby blocking the blood flow of the abdominal aorta and the common iliac artery. However, the diameter of the balloon used in this method is large, and a sheath with a large outer diameter must be used, so the damage to the human body is also large. In addition, because the abdominal aorta is connected to the renal artery, when using a balloon catheter to block the blood flow of the abdominal aorta, it is necessary to always pay attention to avoid affecting the renal artery, which increases the difficulty and risk of the operation.

For the above reasons, direct occlusion of the common iliac artery with a balloon catheter is more acceptable to clinicians than occlusion of the abdominal aorta. However, because the common iliac artery is divided into two branches, the conventional balloon catheter is not suitable for blocking the blood flow of the left and right common iliac arteries at the same time. Good workaround.

In addition, compared with other blood vessels, the interventional path of the common iliac artery is shorter, and the steps of the occlusion operation are relatively simple. Therefore, how to further simplify the operation process of the common iliac artery occlusion is also a question worthy of study.

Patent document CN102698354B provides a double-balloon catheter for thrombolysis, including a connecting device, a stress diffusion tube, a push rod, a balloon, a catheter tip section, an inner tube and a guide wire. The push rod is a hollow structure, the inner tube penetrates the inner cavity of the push rod and the inner cavity of the balloon, and the distal end of the inner tube is fixed with the top section of the catheter, and the connecting device has a first interface and a second interface. The balloon is a double-balloon structure, and includes a first balloon, a second balloon, and a connecting catheter segment that communicates the first balloon and the second balloon with each other, and the balloon has an empty space to pass through the second balloon. When the medicinal liquid is introduced into the interface, the first balloon and the second balloon can be inflated to form a closed treatment space between the first balloon and the second balloon, and the medicinal liquid can enter the closed treatment space through the micropore. The double-balloon catheter for thrombolysis in this patent document can improve the drug delivery efficiency. However, the double balloon catheter in this patent document is not suitable for blood flow occlusion of the common iliac artery.

Patent document CN105726179A provides a special side branch double balloon stent system for the interventional treatment of bifurcation lesions. The double-balloon stent system in this patent document includes a side branch main balloon body, a special-shaped balloon with a flared tail end that fits the opening of the blood vessel after the inner tail end of the side branch main balloon body is expanded, and the side branch ball The head end of the balloon catheter runs through the main balloon body and the special type balloon. The double-balloon stent system in this patent document can make the stent positioned accurately, adhere well to the wall, easy to operate, and has a good clinical application effect. However, the double-balloon stent system in this patent document is not suitable for blood flow occlusion of the common iliac artery.

Patent document CN203090200U provides a novel double balloon catheter. The double-balloon catheter in this patent document includes a hollow catheter body, a balloon I and a balloon II. The inner wall of the hollow catheter body is provided with two pipes for injecting the inflatable medium into the balloon I and the balloon II respectively. There is an opening B on the hollow catheter body between the balloon I and the balloon II. The double-balloon catheter in this patent document is used for interventional diagnosis and treatment of microvascular liver tumors. The contrast agent is injected into the balloon to determine the location of the lesion, block the blood flow in the blood vessel, and seal the catheter. The drug injected into the catheter can only be injected from the opening. When B flows out, it can enter the target small blood vessels in a targeted manner without entering other areas of the liver, so as to realize the diagnosis and treatment of microvascular liver tumors, and minimize the damage to healthy liver tissue. However, the double balloon catheter in this patent document is not suitable for blood flow occlusion of the common iliac artery.

Patent document CN203971148U provides a double-balloon vascular blocking catheter, which includes an elastic balloon, a catheter, a polymer block, and a blocking valve. The catheter is provided with a guide wire cavity and a liquid guide cavity. The end is connected with a polymer block, the catheter is bifurcated in the polymer block, the guide wire cavity is communicated with the wire feed tube, the liquid guide cavity is communicated with the liquid feed tube, and the catheter is sequentially connected with a first elastic balloon, a second elastic balloon, and the first elastic balloon. An elastic balloon is close to the top of the catheter, the catheter between the second elastic balloon and the end of the catheter is provided with a guide hole connecting the surface of the catheter and the guide wire cavity, the inlet pipe is provided with a blocking valve, and the catheter cavity is provided with a blocking valve. It communicates with the first balloon through the first side hole, the catheterization cavity communicates with the second balloon through the second side hole, the catheterization cavity communicates with the second balloon through the second side hole, and the diameter of the first side hole communicates with the second balloon. The side holes have different diameters. The double-balloon vascular blocking catheter in this patent document has a simple double-lumen control structure, no blood accumulation on the surface of the balloon, and better blocking effect. The liquid inlet pipe is provided with a blocking valve to effectively maintain the pressure of the balloon. However, the double-balloon vascular occlusion catheter in this patent document still uses conventional interventional methods, which cannot simplify the procedure of occlusion of the common iliac artery.

Patent document CN203989422U provides a triple-lumen double-balloon dilation catheter, comprising: a triple-lumen joint tube seat, a guide wire catheter, a first balloon inflation tube, a second balloon inflation tube, a first balloon and a second balloon ; the guide wire catheter passes through the first balloon and the second balloon, one end of the first balloon filling tube is communicated with the first balloon, and the second filling tube is communicated with the second balloon; the guide wire catheter, the first balloon The other end of the filling tube and the other end of the filling tube of the second balloon are respectively connected with an interface of the three-cavity joint socket; the volume of the first balloon is larger than that of the second balloon, and the first balloon is connected to the three-cavity joint. The distance of the tube seat is smaller than the distance between the second balloon and the tube seat of the three-lumen joint. The three-chamber double-balloon dilation catheter in the patent literature is first used to expand and dilate the lesion site by the second balloon, and then the lesion site is fully pre-expanded by the second balloon to achieve the desired effect. The stent implantation provides good conditions and can also bring better therapeutic effects to patients. However, the triple-lumen double-balloon dilatation catheter in this patent document still uses conventional interventional methods, which cannot simplify the procedure of common iliac artery occlusion surgery.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a double-balloon catheter for blocking the blood flow of the common iliac artery. This double-balloon catheter can be guided into the human common iliac artery without using a guide wire, which simplifies the operation of blocking the common iliac artery. process, reducing the difficulty of surgery.

In order to achieve the above objects, the present invention adopts the following technical solutions.

A double balloon catheter for blocking the blood flow of the common iliac artery, comprising: a catheter body, a distal balloon, a proximal balloon, a developing ring, a catheter reinforcement and a catheter seat.

The catheter body is composed of a tip, an inner tube and an outer tube, the tip is connected with the distal end of the inner tube, the inner tube is located inside the outer tube, a guide wire channel is formed inside the inner tube, and the area between the inner tube and the outer tube forms a liquid injection A channel, the distal end of the liquid injection channel communicates with the distal balloon, and communicates with the proximal balloon through the liquid injection hole, and is used for injecting the liquid for expanding the distal balloon and the proximal balloon.

The distal balloon and the proximal balloon are arranged at intervals along the length direction of the catheter body, and the catheter body passes through the distal balloon and the proximal balloon; the distal end of the distal balloon is connected to the inner tube, and the distal end The proximal end of the balloon is connected with the outer tube, and the two ends of the proximal balloon are connected with the outer tube.

The proximal ends of the inner tube and the outer tube pass through the middle of the catheter reinforcement and are connected with the catheter base, and the catheter reinforcement is connected with the catheter base; the main joint at the end of the catheter base is communicated with the guide wire channel, and the catheter base end The auxiliary joint of the part is communicated with the liquid injection channel, and the auxiliary joint can be connected to the pressure pump.

Further, the inner tube is in a "J" shape near the tip, so that the tip and the catheter body form a certain angle, and the angle range is 90-180 ^° ; the material of the tip is polyurethane or block polyetheramide elastomer.

Further, the inner tube has a three-layer structure, wherein the inner layer and the outer layer are polymer layers, the material of the inner layer is nylon, high-density polyethylene or polytetrafluoroethylene, and the material of the outer layer is polyurethane or block. Polyetheramide elastomer, the middle layer is a wire wound or braided structure, and the middle layer is made of 304V stainless steel, 316L stainless steel or nickel-titanium alloy.

Further, the outer tube has a single-layer structure and is made of polyurethane or block polyetheramide elastomer.

Further, the effective length of the catheter body is 50-150 cm.

Further, the material of the distal balloon and the proximal balloon is silicone rubber, polyurethane or block polyetheramide elastomer.

Further, the expanded diameter of the distal balloon is 5-10 mm, and the expanded length is 10-30 mm.

Further, the expanded diameter of the proximal balloon 3 is 5-10 mm, and the expanded length is 10-30 mm.

Further, the distance between the distal balloon and the proximal balloon is 4-10 cm.

Further, the inner tubes in the distal balloon and the proximal balloon are provided with four imaging rings, wherein the distal balloon imaging ring is located on the inner tube in the distal balloon, and the proximal balloon is visualized. The ring is located on the inner tube in the proximal balloon; the imaging ring is made of platinum-iridium or platinum-tungsten alloy.

Further, the material of the conduit reinforcement is nylon, polyurethane, high-density polyethylene or block polyetheramide elastomer.

Further, the material of the catheter holder is polycarbonate.

Beneficial effects of the present invention.

The double balloon catheter of the present invention can directly pass through the bifurcation of the common iliac artery without a guide wire in the common iliac artery occlusion operation, which simplifies the process of the common iliac artery occlusion operation. The double-balloon catheter of the present invention also retains the guide wire channel to deal with the special situation that cannot directly pass through the bifurcation of the common iliac artery. In addition, by using the pressure pump to inject the liquid containing the contrast agent into the liquid injection channel from the auxiliary joint, the distal balloon and the proximal balloon can be expanded at the same time, and the purpose of blocking the blood flow of the target blood vessel is achieved.

Description of drawings

FIG. 1 is a schematic structural diagram of a double balloon catheter for blocking the blood flow of the common iliac artery provided by the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 .

FIG. 3 is a schematic diagram of the use of a double balloon catheter for blocking the blood flow of the common iliac artery provided by the present invention during an operation.

Marked in the figure: 1 is the catheter body, 2 is the distal balloon, 3 is the proximal balloon, 4 is the developing ring, 5 is the catheter reinforcement, 6 is the catheter seat, 11 is the tip, 12 is the inner tube, and 13 is the inner tube. Outer tube, 14 is the guide wire channel, 15 is the injection channel, 16 is the injection hole, 41, 42 are the distal balloon developing ring, 43, 44 are the proximal balloon developing ring, 61 is the main connector, 62 is the For the auxiliary joint, 121 is the inner layer, 122 is the middle layer, and 123 is the outer layer.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1.

As shown in FIGS. 1 and 2 , a double-balloon catheter for blocking the blood flow of the common iliac artery in this embodiment includes a catheter body 1 , a distal balloon 2 , a proximal balloon 3 , and a developing ring 4 , conduit reinforcement 5 and conduit seat 6 .

The catheter body 1 is composed of a tip 11, an inner tube 12 and an outer tube 13. The tip 11 is connected to the distal end of the inner tube 12, the inner tube 12 is located inside the outer tube 13, and a guide wire channel 14 is formed inside the inner tube 12. The area between 12 and the outer tube 13 forms an injection channel 15, the distal end of the injection channel 15 communicates with the distal balloon 2, and communicates with the proximal balloon 3 through the injection hole 16, for injecting the distal balloon balloon 2 and proximal balloon 3 inflated fluid.

The distal balloon 2 and the proximal balloon 3 are arranged at intervals along the length direction of the catheter body 1, and the catheter body 1 passes through the distal balloon 2 and the proximal balloon 3; the distal end of the distal balloon 2 Connected to the inner tube 12 , the proximal end of the distal balloon 2 is connected to the outer tube 13 , and the two ends of the proximal balloon 3 are connected to the outer tube 13 .

The proximal ends of the inner tube 12 and the outer tube 13 pass through the middle of the catheter reinforcement 5 and are connected to the catheter holder 6, and the catheter reinforcement 5 is connected to the catheter holder 6; the main joint 61 at the end of the catheter holder 6 is connected to the The guide wire channel 14 communicates with each other, and the auxiliary joint 62 at the end of the catheter holder 6 communicates with the liquid injection channel 15 , and the auxiliary joint 62 can be connected to a pressure pump.

The described inner tube 12 is in a "J" shape near the tip 11, so that the tip 11 and the catheter body 1 form a certain angle α, and the angle α is preferably 90 ^° ; the material of the tip 11 is preferably polyurethane, and the tip 11 has a certain elasticity and softness In the process of interventional surgery, the double-balloon catheter can smoothly pass through the vascular lesions, and the damage of the double-balloon catheter to human blood vessels can be reduced.

The inner tube 12 has a three-layer structure, wherein the inner layer 121 and the outer layer 123 are polymer layers, the material of the inner layer 121 is preferably nylon, the material of the outer layer 123 is preferably polyurethane, and the middle layer 122 is preferably a wire winding. Structure, the material of the middle layer 122 is preferably 304V stainless steel. The outer tube 13 has a single-layer structure, and the material is preferably polyurethane. The effective length of the catheter body 1 is preferably 50 cm.

The material of the distal balloon 2 and the proximal balloon 3 is preferably silicon rubber. The diameter of the distal balloon 2 after expansion is preferably 5 mm, and the length after expansion is preferably 10 mm. The expanded diameter of the proximal balloon 3 is preferably 5 mm, and the expanded length is preferably 10 mm. The distance between the distal balloon 2 and the proximal balloon 3 is preferably 10 cm.

The inner tubes 12 in the distal balloon 2 and the proximal balloon 3 are provided with four imaging rings 4 , wherein the distal balloon imaging rings 41 and 42 are located on the inner tubes 12 in the distal balloon 2 , the proximal balloon developing rings 43 and 44 are located on the inner tube 12 in the proximal balloon 3; the material of the developing ring 4 is preferably platinum-iridium alloy.

The material of the conduit reinforcement 5 is preferably nylon. The material of the catheter holder 6 is polycarbonate.

Example two.

As shown in FIGS. 1 and 2 , a double-balloon catheter for blocking the blood flow of the common iliac artery in this embodiment includes a catheter body 1 , a distal balloon 2 , a proximal balloon 3 , and a developing ring 4 , conduit reinforcement 5 and conduit seat 6 .

The catheter body 1 is composed of a tip 11 , an inner tube 12 and an outer tube 13 , and the tip 11 is connected to the distal end of the inner tube 12 . The inner tube 12 is located inside the outer tube 13, a guide wire channel 14 is formed inside the inner tube 12, an injection channel 15 is formed in the area between the inner tube 12 and the outer tube 13, and the distal end of the injection channel 15 communicates with the distal balloon 2 , communicates with the proximal balloon 3 through the liquid injection hole 16 , and is used for injecting the liquid for expanding the distal balloon 2 and the proximal balloon 3 .

The distal balloon 2 and the proximal balloon 3 are arranged at intervals along the length direction of the catheter body 1, and the catheter body 1 passes through the distal balloon 2 and the proximal balloon 3; the distal end of the distal balloon 2 Connected to the inner tube 12 , the proximal end of the distal balloon 2 is connected to the outer tube 13 , and the two ends of the proximal balloon 3 are connected to the outer tube 13 .

The proximal ends of the inner tube 12 and the outer tube 13 pass through the middle of the catheter reinforcement 5 and are connected to the catheter holder 6, and the catheter reinforcement 5 is connected to the catheter holder 6; the main joint 61 at the end of the catheter holder 6 is connected to the The guide wire channel 14 communicates with each other, and the auxiliary joint 62 at the end of the catheter holder 6 communicates with the liquid injection channel 15 , and the auxiliary joint 62 can be connected to a pressure pump.

The described inner tube 12 is in a "J" shape near the tip 11, so that the tip 11 and the catheter body 1 form a certain angle α, and the angle α is preferably 120 ^° ; the material of the tip 11 is preferably a block polyetheramide elastomer, and the tip 11 has certain elasticity and flexibility, which can make the double balloon catheter pass through the vascular lesions smoothly during the interventional operation, and reduce the damage of the double balloon catheter to the human blood vessels.

The inner tube 12 has a three-layer structure, wherein the inner layer 121 and the outer layer 123 are polymer layers, the material of the inner layer 121 is preferably high-density polyethylene, and the material of the outer layer 123 is preferably a block polyetheramide elastomer , the middle layer 122 is preferably a braided structure of metal wires, and the material of the middle layer is preferably 316L stainless steel. The outer tube 13 has a single-layer structure, and the material is preferably a block polyetheramide elastomer. The effective length of the catheter body 1 is preferably 100 cm.

The material of the distal balloon 2 and the proximal balloon 3 is preferably polyurethane. The diameter of the distal balloon 2 after expansion is preferably 8 mm, and the length after expansion is preferably 20 mm. The expanded diameter of the proximal balloon 3 is preferably 8 mm, and the expanded length is preferably 20 mm. The distance between the distal balloon 2 and the proximal balloon 3 is preferably 6 cm.

The inner tubes 12 in the distal balloon 2 and the proximal balloon 3 are provided with four imaging rings 4 , wherein the distal balloon imaging rings 41 and 42 are located on the inner tubes 12 in the distal balloon 2 , the proximal balloon developing rings 43 and 44 are located on the inner tube 12 in the proximal balloon 3; the material of the developing ring 4 is preferably platinum-tungsten alloy.

The material of the conduit reinforcement 5 is preferably polyurethane. The material of the catheter holder 6 is polycarbonate.

Example three.

As shown in FIGS. 1 and 2 , a double-balloon catheter for blocking the blood flow of the common iliac artery in this embodiment includes a catheter body 1 , a distal balloon 2 , a proximal balloon 3 , and a developing ring 4 , conduit reinforcement 5 and conduit seat 6 .

The catheter body 1 is composed of a tip 11 , an inner tube 12 and an outer tube 13 , and the tip 11 is connected to the distal end of the inner tube 12 . The inner tube 12 is located inside the outer tube 13, a guide wire channel 14 is formed inside the inner tube 12, an injection channel 15 is formed in the area between the inner tube 12 and the outer tube 13, and the distal end of the injection channel 15 communicates with the distal balloon 2 , communicates with the proximal balloon 3 through the liquid injection hole 16 , and is used for injecting the liquid for expanding the distal balloon 2 and the proximal balloon 3 .

The distal balloon 2 and the proximal balloon 3 are arranged at intervals along the length direction of the catheter body 1, and the catheter body 1 passes through the distal balloon 2 and the proximal balloon 3; the distal end of the distal balloon 2 Connected to the inner tube 12 , the proximal end of the distal balloon 2 is connected to the outer tube 13 , and the two ends of the proximal balloon 3 are connected to the outer tube 13 .

The proximal ends of the inner tube 12 and the outer tube 13 pass through the middle of the catheter reinforcement 5 and are connected to the catheter holder 6, and the catheter reinforcement 5 is connected to the catheter holder 6; the main joint 61 at the end of the catheter holder 6 is connected to the The guide wire channel 14 communicates with each other, and the auxiliary joint 62 at the end of the catheter holder 6 communicates with the liquid injection channel 15 , and the auxiliary joint 62 can be connected to a pressure pump.

The described inner tube 12 is in the shape of "J" near the tip 11, so that the tip 11 and the catheter body 1 form a certain angle α, and the angle α is preferably 180 ^° ; the material of the tip 11 is preferably polyurethane, and the tip 11 has a certain elasticity and softness. In the process of interventional surgery, the double-balloon catheter can smoothly pass through the vascular lesions, and the damage of the double-balloon catheter to human blood vessels can be reduced.

The inner tube 12 has a three-layer structure, wherein the inner layer 121 and the outer layer 123 are polymer layers, the material of the inner layer 121 is preferably polytetrafluoroethylene, the material of the outer layer 123 is preferably polyurethane, and the middle layer 122 is preferably metal. For the braided structure of the wire, the material of the middle layer is preferably a nickel-titanium alloy. The outer tube 13 has a single-layer structure, and the material is preferably a block polyetheramide elastomer. The effective length of the catheter body 1 is preferably 150 cm.

The material of the distal balloon 2 and the proximal balloon 3 is preferably a block polyetheramide elastomer. The expanded diameter of the distal balloon 2 is preferably 10 mm, and the expanded length is preferably 30 mm. The expanded diameter of the proximal balloon 3 is preferably 10 mm, and the expanded length is preferably 30 mm. The distance between the distal balloon 2 and the proximal balloon 3 is preferably 4 cm.

The inner tubes 12 in the distal balloon 2 and the proximal balloon 3 are provided with four imaging rings 4 , wherein the distal balloon imaging rings 41 and 42 are located on the inner tubes 12 in the distal balloon 2 , the proximal balloon developing rings 43 and 44 are located on the inner tube 12 in the proximal balloon 3; the material of the developing ring 4 is preferably platinum-iridium alloy.

The material of the conduit reinforcement 5 is preferably high-density polyethylene. The material of the catheter holder 6 is polycarbonate.

The double-balloon catheter described in the above embodiment can directly pass through the bifurcation of the common iliac artery without a guide wire in the common iliac artery occlusion operation, which simplifies the process of the common iliac artery occlusion operation, as shown in Figure 3 . The double-balloon catheter described in the above-mentioned embodiment also retains the guide wire channel 14 to deal with the special situation where the bifurcation of the common iliac artery cannot be directly passed. In addition, by using a pressure pump to inject liquid containing a contrast agent into the liquid injection channel 15 from the auxiliary joint 62, the distal balloon 2 and the proximal balloon 3 can be expanded simultaneously, thereby achieving the purpose of blocking the blood flow of the target blood vessel.

It can be understood that the distal end mentioned in the text refers to the end that is farther from the operator or the staff, and the proximal end refers to the end that is closer to the operator or the staff.

Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an example, the protection scope of the present invention is defined by the appended claims, and those skilled in the art will not deviate from the Under the premise of the principle and essence of the present invention, changes or modifications may be made to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims (9)

1. A double-balloon catheter for blocking the blood flow of the common iliac artery, characterized in that: the double-balloon catheter comprises: a catheter body (1), a distal balloon (2), a proximal balloon (3), a developing ring (4), a catheter reinforcement (5) and a catheter holder (6); the catheter body (1) is composed of a tip (11), an inner tube (12) and an outer tube (13), The tip (11) is connected with the distal end of the inner tube (12), the inner tube (12) is located inside the outer tube (13), a guide wire channel (14) is formed inside the inner tube (12), and the inner tube (12) and the outer tube ( The area between 13) forms a liquid injection channel (15), the distal end of the liquid injection channel (15) communicates with the distal balloon (2), and communicates with the proximal balloon (3) through the liquid injection hole (16), For injecting the liquid for expanding the distal balloon (2) and the proximal balloon (3); the distal balloon (2) and the proximal balloon (3) are along the length direction of the catheter body (1) are arranged at intervals, and the catheter body (1) passes through the distal balloon (2) and the proximal balloon (3); the distal end of the distal balloon (2) is connected with the inner tube (12), and the distal balloon ( 2) The proximal end is connected with the outer tube (13), and both ends of the proximal balloon (3) are connected with the outer tube (13); the proximal ends of the inner tube (12) and the outer tube (13) are connected from the catheter The middle of the reinforcing member (5) passes through and is connected with the catheter holder (6), the catheter reinforcing member (5) is connected with the catheter holder (6); the main joint (61) at the end of the catheter holder (6) is connected with the guide wire channel (14) are in communication, the auxiliary joint (62) at the end of the catheter holder (6) is in communication with the liquid injection channel (15), and the auxiliary joint (62) can be connected to the pressure pump; the inner tube (12) near the tip is "J" shape, so that the tip (11) and the catheter body (1) form a certain angle, and the angle range is 90-180 ^° ; the material of the tip (11) is polyurethane or block polyetheramide elastomer. 2. A double balloon catheter for blocking the blood flow of the common iliac artery according to claim 1, characterized in that: the inner tube (12) is a three-layer structure, wherein the inner layer (121) and the outer layer (123) is a polymer layer, the inner layer (121) is made of nylon, high-density polyethylene or polytetrafluoroethylene, the outer layer (123) is made of polyurethane or block polyetheramide elastomer, and the middle layer (122) is a winding or braided structure of metal wires, and the material of the middle layer (122) is 304V stainless steel, 316L stainless steel or nickel-titanium alloy. 3. A double balloon catheter for blocking the blood flow of the common iliac artery according to claim 1, characterized in that: the outer tube (13) is a single-layer structure, and the material is polyurethane or block Polyetheramide elastomer. The double balloon catheter for blocking the blood flow of the common iliac artery according to claim 1, characterized in that: the effective length of the catheter body (1) is 50-150 cm. 5. A double-balloon catheter for blocking the blood flow of the common iliac artery according to claim 1, characterized in that: the distal balloon (2) and the proximal balloon (3) have The material is silicone rubber, polyurethane or block polyetheramide elastomer. 6 . The double-balloon catheter for blocking the blood flow of the common iliac artery according to claim 1 , wherein the diameter of the distal balloon (2) after expansion is 5-10 mm, 6 . The expanded length is 10-30 mm; the expanded diameter of the proximal balloon (3) is 5-10 mm, and the expanded length is 10-30 mm; the distal balloon (2) and the proximal end The balloons (3) are separated by a distance of 4-10 cm. 7. A double-balloon catheter for blocking the blood flow of the common iliac artery according to claim 1, characterized in that: in the distal balloon (2) and the proximal balloon (3) Four developing rings (4) are arranged on the inner tube of the s 43, 44) are located on the inner tube (12) in the proximal balloon (3); the material of the developing ring (4) is platinum-iridium alloy or platinum-tungsten alloy. 8. The double-balloon catheter for blocking the blood flow of the common iliac artery according to claim 1, characterized in that: the catheter reinforcement (5) is made of nylon, polyurethane, high-density polyethylene Ethylene or block polyetheramide elastomers. 9 . The double balloon catheter for blocking the blood flow of the common iliac artery according to claim 1 , wherein the material of the catheter seat ( 6 ) is polycarbonate. 10 .