Portal vein tumor thrombus microwave ablation catheter and device

Abstract

The portal vein tumor thrombus microwave ablation catheter is composed of a flexible catheter body, a coaxial cable and a guide wire guide tube, the coaxial cable and the guide wire guide tube are axially parallel and arranged in the flexible catheter body, and the coaxial cable is composed of a coaxial cable inner conductor, a coaxial cable insulating layer and a coaxial cable outer conductor from inside to outside; the far end of the coaxial cable is connected with a microwave radiation head. The catheter is small in diameter, can meet the requirement of passing through the interior of the vein, accurately reaches the portal vein tumor thrombus part through the guide wire for ablation, and can effectively open the portal vein.

Description

Technical field [0001] The present invention relates to the field of medical devices, and in particular, to a portal orthosis and microwave ablation catheter and device. Background technique [0002] Hepatocellular carcinoma (HCC) is one of the most common malignant tumors worldwide, and about 35-50% of patients with liver cancer (PVTT), due to the increase in tumor spread to the blood, leading to serious negative prognosis Factors and high recurrence risks. The current study regards PVTT as a complicated anatomical and clinical condition, including complications, patients caused by tumor biological invasiveness, and patient's clinical characteristics, patient clinical features, patients with complications, patients with complications, patients with tumor biological invasiveness, peripheral high pressure, with different prognosis and new therapy A wide range of patients and tolerance to tumor treatment. [0003] According to reports, in the absence of treatment, the median surviv...

AI Technical Summary

Problems solved by technology

However, microwave coagulation therapy (MCT) uses rigid straight-rod microwaves to ablate portal vein tumor thrombi from the outside of the portal vein, which cannot open up the portal vein.

However, the radiofrequency ablation (RFA) method needs to place the return electrode on the back of the patient, and the doctor cannot control the high-frequency current to flow along the portal vein tumor thrombus area to be ablated for effective ablation.

Although the currently available HAB I B radiofrequency ablation catheter can be used for conformal ablation, its indications are for intraluminal use in the biliary tract and digestive tract, and radiofrequency ablation is greatly affected by heat sinking effects, so it is not suitable for intravascular ablation.

Images