Double-ball-cage electrode catheter device for ablation of tissue in human body cavity

Abstract

The invention relates to a double-ball-cage electrode catheter device for ablation of tissue in a human body cavity. The device comprises a control handle, a tube body, an electric wire, a pulse electrode, a core tube and front and rear ball cage electrodes arranged in pairs, wherein the control handle is matched with a palm of an operator, and the tube body is arranged in the control handle and extends out of a working end of the control handle; the electric wire is arranged in the tube body; the pulse electrode is arranged in the control handle and is used for generating electric pulses for ablating pathological tissues; the core tube is arranged in the tube body, and the core tube freely moves in the tube body in the axial direction; and the front and rear ball cage electrodes are arranged in pairs. The device has the advantages that the structural design is reasonable, the device can effectively aim at a portal vein targeting area, the ablation pertinence is good, the ablation is thorough, and the side effect is small.

Description

technical field [0001] The invention relates to a medical device, which belongs to the field of pulse ablation technology and operation, in particular to a double-ball cage electrode catheter device used for tissue ablation in human cavity. Background technique [0002] In diseases such as cancer and tumor, lesions often occur in disease-related or surrounding cavities. This lesion, different from the tumor itself, often spreads around the wall of the lumen (especially blood vessels), resulting in narrow lumen and spread of diseased tissue. For example, portal vein tumor thrombus (PVTT) is a common complication in the progression of primary liver cancer, which has a special biological behavior of spreading against the portal vein blood flow to the main trunk. The emergence of PVTT will inevitably aggravate portal hypertension, cause a series of symptoms of portal hypertension, affect the quality of life of patients, and threaten the lives of patients. [0003] Radiofrequen...

AI Technical Summary

Problems solved by technology

The technical solution of this invention application is to use the speculum and measuring electrodes to locate the tumor, and then use the inflatable balloon to clamp the tumor for ablation. The disadvantages are: 1. The structure of double balloons + double elastic metal claw cage electrodes is relatively complicated , increasing the radial diameter of the catheter; 2. When the balloon is inflated, the annular distribution of the elastic claw cage is extremely uneven, resulting in dead angles in the ablation, incomplete and irregular ablation, and the field strength distribution of the pulse electric field is irregular; 3. After tumor ablation, after the balloon collapses, it is difficult for the elastic claw cage to return from bending to natural straightening smoothly, and there is a risk that it cannot be withdrawn from the blood vessel smoothly, and it is easy to damage the blood vessel

It also cannot form an effective support for the vessel. This patent application is aimed at a large-area ablation situation. If it is applied to the portal vein vessel, it will not produce a good ablation effect. This technology has the following disadvantages: 1. Ring-shaped electrodes The length is too short, and the electrode width of the entire working part is too large, so it is difficult to play a role in a cavity such as the portal vein

As a result of this design, a large voltage cannot be applied, and the ablation depth in the radial direction is also small

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