CN211301686U - A double-balloon precise quantitative drug injection catheter - Google Patents

Abstract

The utility model discloses an accurate quantification injection pipe of two saccules, including seal wire, main duct and sacculus, the sacculus comprises interior sacculus and outer sacculus, outer sacculus and interior sacculus intermediate part are arranged in to the main duct, in the main duct was arranged in to the seal wire, the seal wire penetrated from the seal wire exit by the seal wire entry that sets up on the main duct and worn out, was equipped with pressurization pipe and injection pipe in the main duct, the exit end of injection pipe passes the pipe and arranges the clearance department between interior sacculus and the outer sacculus in, and the other end and the injection pump of injection pipe are connected, are equipped with the control valve on the injection pipe. The outlet end of the pressurizing conduit passes through the main conduit to be communicated with the inner balloon, and the other end of the pressurizing conduit is connected with the pressurizing pump. The utility model discloses can realize controlling the accurate control of using the medicine dosage respectively through injection pipe and forcing pipe and annotate the medicine volume and pressurize the size, in the medicine pours into the vascular intimal wall into, the medicine is even, makes medicine can the full play effect to can annotate the medicine repeatedly, still can change the injection kind.

Description

A double-balloon precise quantitative drug injection catheter

technical field

The utility model belongs to medical equipment, in particular to a double-balloon precise and quantitative drug injection catheter.

Background technique

In-stent restenosis (ISR) is a major problem in the era of PCI for coronary heart disease. In the current ISR treatment plan, there are many risk factors and contraindications for coronary artery bypass grafting. With the risk of repeat ISR and other multiple stent placements, drug-eluting balloon (DCB) therapy avoids foreign body plants and preserves the patient the opportunity for follow-up treatment if necessary. The currently available drug balloons on the market can release the drug to the local blood vessel wall, reduce the time and intensity of antiplatelet therapy, and avoid the insertion of foreign bodies in the body for the treatment of ISR. Patients at high risk of bleeding, patients undergoing oral anticoagulants or undergoing recent surgery, patients with a history of subacute stent thrombosis, patients who refuse to insert foreign bodies in the body, the surface of the balloon is coated with fixed drugs, but the coating Most of the drugs used are anti-smooth muscle cell proliferation drugs such as paclitaxel or rapamycin, which play an important role in the field of coronary heart disease interventional therapy by achieving local treatment of plaque and prevention and treatment of ISR. Nevertheless, there are still some problems with drug-coated balloons. : 1. There are limited types of drug-coated balloons on the market; 2. Uniform and precise administration cannot be achieved; 3. Repeated administration is not possible; 4. The cost is expensive. In view of the above shortcomings, we will focus on the injection balloon. The drug injection balloon is currently only used in animal experiments, (1) clearway, the output is very small, the variety is limited, it cannot be transformed into clinical application, and the injection volume cannot be accurately controlled; (2) the middle segment perfusion with blocking balloons at both ends The balloon can only inject the drug into the lumen of the blood vessel and has no effect on the blood vessel wall.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and to provide a simple and reasonable structure, the mastoid with a uniform surface of the balloon protrudes into the intima of the blood vessel wall under the action of high pressure and injects medicine into it, and the same patient has multiple diseased blood vessels. It can be used and injected repeatedly, the dose can be precisely controlled, the type of injection can be easily changed, the cost of use can be reduced, and the economic burden of patients and their families can be reduced.

The utility model is achieved through the following technical solutions:

A double-balloon precise quantitative drug injection catheter, comprising a guide wire, a main catheter and a balloon, the balloon is composed of an inner balloon and an outer balloon, the outer balloon is wrapped outside the inner balloon, and the main catheter is placed In the middle part of the outer balloon and the inner balloon, the guide wire is placed in the main catheter, the guide wire is threaded through the guide wire inlet set on the main catheter and passed out from the guide wire outlet, and the main catheter is provided with a pressurized catheter And the drug injection catheter, the outlet end of the drug injection catheter is placed in the gap between the inner balloon and the outer balloon through the catheter, the other end of the drug injection catheter is connected with the drug injection pump, and the drug injection catheter is provided with There is a control valve; the outlet end of the pressurizing catheter is communicated with the inner balloon through the main catheter, and the other end of the pressurizing catheter is connected with the pressurizing pump; A medicine outlet hole is provided on the protrusion.

The outlet end of the pressurizing catheter is provided with at least one outlet in communication with the inner balloon.

The advantages of the utility model are: the double-balloon precise quantification drug injection catheter of the utility model patent can realize the precise control of the dose of the drug used, the drug is injected into the intima of the blood vessel, and the drug is administered evenly, and the drug is not wasted, so that the drug can be fully Play a role. It can be injected repeatedly, and the type of injection can be changed. The injection volume and pressure are controlled by the injection tube and the pressure tube, respectively. The medicine in the medicine bag is discharged from the mastoid on the outer balloon under the pressure of the inner balloon, and the medicine is fully contacted with the blood vessels. achieve better therapeutic effect.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

Detailed ways

Implementation: As shown in the figure, the double-balloon precise quantitative drug injection catheter includes a guide wire 8, a main catheter 1 and a balloon. The balloon is composed of an inner balloon 7 and an outer balloon 5. According to the characteristics of the balloon, The inner balloon 7 is compliant, the outer balloon 5 is non-compliant, the outer balloon 5 is wrapped outside the inner balloon 7, and the outer wall of the outer balloon 5 is provided with a number of evenly distributed papillae 4. , the mastoid 4 is provided with a drug outlet hole 6 . The main catheter 1 is placed in the middle of the outer balloon 5 and the inner balloon 7, the guide wire 8 is placed in the main catheter 1, and the guide wire 8 is inserted through the guide wire inlet 10 provided on the main catheter 1 from the guide wire The outlet 13 goes out, the main conduit 1 is provided with a pressurizing conduit 3 and a medicine injection conduit 2, and the outlet end of the medicine injection conduit 2 passes through the conduit and is placed between the inner balloon 7 and the outer balloon 5. At the gap, the other end of the drug injection conduit 2 is connected to the drug injection pump 11 , and a control valve 9 is provided on the drug injection conduit 2 outside the main conduit 1 . The outlet end of the pressurizing catheter 3 communicates with the inner balloon 7 through the main catheter 1, the outlet end of the pressurizing catheter 3 is at least one outlet and communicates with the inner balloon 7, and the other end of the pressurizing catheter 3 is connected with the pressurizing pump. 12 (syringe with pressure gauge) connection.

When in use, open the control valve 9, and the drug is injected into the space between the inner balloon 7 and the outer balloon 5 through the drug injection pump 11 and the drug injection catheter 2. After the drug reaches a certain dose, close the control valve 9 and the drug injection pump. 11. Then, the contrast agent in the compression pump 12 is injected into the inner balloon 7 through the pressure pump 12 to expand the inner balloon 7. As the volume of the inner balloon 7 continues to expand and increase, the inner balloon 7 becomes The medicine between the inner balloon 7 and the outer balloon 5 will be squeezed. During the continuous compression process, the mastoid 4 on the outer balloon 5 will pierce the intima wall of the blood vessel, and the medicine will be squeezed after being squeezed. It will be discharged from the drug outlet hole 6 on the mastoid 4 on the outer wall of the outer balloon 5, so that the drug enters the intima wall of the blood vessel. The drug discharge hole 6 on the protrusion 4 can be evenly attached to the lesion in the intimal wall of the blood vessel after being discharged, and the drug can last for a long time in the intimal wall, and a better therapeutic effect can be achieved on the lesion. Because this product can accurately control the dose of the drug, inject the drug into the intima of the blood vessel, and has a good local effect, it also reduces the cost of the drug, and reduces the economic burden on patients and their families.

Claims (2)

1. a double-balloon precise quantification drug injection catheter, comprising a guide wire, a main catheter and a balloon, the balloon is made up of an inner balloon and an outer balloon, and the outer balloon is wrapped outside the inner balloon, and the main The tube is placed in the middle part of the outer balloon and the inner balloon, the guide wire is placed in the main catheter, and the guide wire is threaded through the guide wire inlet set on the main catheter and threaded out from the guide wire outlet. A pressurized catheter and a drug injection catheter are arranged in the tube, the outlet end of the drug injection catheter is placed in the gap between the inner balloon and the outer balloon through the catheter, and the other end of the drug injection catheter is connected with the drug injection pump, and A control valve is provided on the drug injection catheter; the outlet end of the pressurizing catheter is communicated with the inner balloon through the main catheter, and the other end of the pressurizing catheter is connected with the pressurizing pump; the outer wall of the outer balloon is provided with There are several mastoids, and there are drug outlet holes on the mastoids. 2 . The double-balloon precise quantitative drug injection catheter according to claim 1 , wherein the outlet end of the pressurizing catheter is provided with at least one outlet that communicates with the inner balloon. 3 .

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