Double-balloon precise quantitative drug injection catheter

Abstract

The invention discloses a double-balloon precise quantitative drug injection catheter. The catheter comprises a guide wire, a main catheter body and a balloon, the balloon is composed of an inner balloon body and an outer balloon body, the main catheter body is arranged in the middle of the outer balloon body and the inner balloon body, the guide wire is arranged in the main catheter body, the guide wire penetrates through a guide wire inlet formed in the main catheter body and penetrates out from a guide wire outlet, the main catheter body is internally provided with a pressure catheter bodyand a drug injection catheter body, the outlet end of the drug injection catheter body penetrates through the catheter and placed in a gap between the inner balloon body and the outer balloon body, the other end of the drug injection catheter body is connected with a drug injection pump, ad a control valve is arranged on the drug injection catheter body. The outlet end of the pressure catheter body penetrates through the main catheter body to be communicated with the inner balloon body, and the other end of the pressure catheter body is connected with a pressure pump. Accordingly, precise control over the dosage of applied drugs can be achieved, the drug injection amount and pressure size are controlled through a drug injection pipe and a pressure pipe respectively, drugs are injected intothe endovascular wall, dosing is uniform, the drugs are not wasted, the drugs can be fully utilized, drug injection can be conducted repeatedly, and the type of drug injection can be changed.

Description

technical field [0001] The invention belongs to medical devices, in particular to a catheter for double-balloon precise and quantitative drug injection. Background technique [0002] In-stent restenosis (ISR) is a major problem in the PCI era of coronary heart disease today. In the current ISR treatment plan, there are many risk factors and contraindications for coronary artery bypass grafting, and re-implantation of stents may cause Re-ISR and other multiple stent implantation risks, drug-eluting balloon (DCB) treatment avoids foreign body implantation, and preserves the opportunity for follow-up treatment if necessary. Drug balloons currently on the market can release drugs to the local blood vessel wall, reduce the time and intensity of antiplatelet therapy, and avoid implanting foreign bodies in the body, and are used to treat ISR. Patients with high bleeding risk, patients who are taking oral anticoagulants or have undergone recent surgery, patients with a history of s...

AI Technical Summary

Problems solved by technology

Drug balloons currently on the market can release drugs to the local blood vessel wall, reduce the time and intensity of antiplatelet therapy, and avoid implanting foreign bodies in the body, and are used to treat ISR. Patients with high bleeding risk, patients who are taking oral anticoagulants or have undergone recent surgery, patients with a history of subacute stent thrombosis, and patients who refuse to implant foreign bodies in the body, the surface of the balloon is coated with fixed drugs, but the coating Drugs such as paclitaxel or rapamycin are mostly anti-proliferative drugs for smooth muscle cells, which play an important role in the field of interventional therapy for coronary heart disease by achieving local treatment of plaque and prevention of ISR. However, there are still some problems with drug-coated balloons. : 1. The types of drug-coated balloons on the market are limited; 2. Uniform and precise drug administration cannot be achieved; 3. Repeated drug administration is not possible; 4. Expensive

Injection balloons are currently only used in animal experiments, (1) Clearway, with very little output and limited varieties, cannot be transformed into clinical applications, and the injection volume cannot be precisely controlled; (2) Middle segment perfusion with blocking balloons at both ends The balloon can only inject the drug into the blood vessel lumen without any effect on the blood vessel wall

Images