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Plasma device and method for ablation of atherosclerotic plaque

A plasma and atherosclerotic technology, applied in the parts of surgical instruments, medical science, surgery, etc., can solve problems such as limited energy and application limitations, and achieve improved blood supply to the distal extremities, reasonable structure settings, and improved blood flow. Effect

Active Publication Date: 2018-09-04
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Crack atherosclerotic plaques and ablate thrombus through the mechanical vibration and cavitation effect of low-frequency high-energy ultrasound, so as to achieve the purpose of blood vessel recanalization, but because of its limited energy, its clinical application is still greatly limited

Method used

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  • Plasma device and method for ablation of atherosclerotic plaque
  • Plasma device and method for ablation of atherosclerotic plaque
  • Plasma device and method for ablation of atherosclerotic plaque

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 , the atmospheric pressure-cooled plasma jet device for ablation of atherosclerotic plaque disclosed by the present invention includes a columnar quartz glass tube 1, a hole is opened on the top of the columnar quartz glass tube 1, and a high-voltage needle electrode 2 (a tungsten needle) It is inserted into the columnar quartz glass tube 1 through the hole, and the tube wall of the columnar quartz glass tube 1 is provided with an air inlet 3, and at a distance of 3 to 4 cm from the bottom of the columnar quartz tube 1, there is a tube that can wrap the columnar quartz glass circumferentially. The ring-shaped ground electrode 4 of the tube 1 is insulated with polyvinyl fluoride on the outside; the bottom of the columnar quartz glass tube 1 is a tapered neck structure, and a plastic conduit 5 is connected to the neck, and the plasma 6 is sprayed through the end of the conduit 5. The length of the ejected plasma can reach 1-2cm.

Embodiment 2

[0031] see figure 2 , on the basis of Example 1, a layer of quartz glass sleeve 7 is coated outside the high-voltage needle-shaped electrode (central tungsten needle), which can form the plasma generated by the dielectric barrier discharge mode.

Embodiment 3

[0033] see image 3 , on the basis of Example 1, the air inlet is set on the top of the columnar quartz glass tube 1, and at the same time, it is improved to a double-ring ground electrode structure, and the distance between the two ground electrodes is 3-5cm. The upper end of the quartz tube is fed with basic and auxiliary gases such as argon, and when a sinusoidal high pressure is connected externally, a plasma jet can be generated in the tube.

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Abstract

The invention discloses a plasma device used for ablating atherosclerotic plaques and a generation method, and belongs to the technical field of biological medical equipment. The plasma device comprises a columnar quartz glass tube, a hole is formed in the top of the columnar quartz glass tube, a high-voltage needle electrode is inserted into the columnar quartz glass tube through the hole, an air inlet is formed in the wall of the columnar quartz glass tube, and an annular ground electrode is arranged at the bottom of the columnar quartz glass tube, wherein the columnar quartz glass tube is wrapped with the annular ground electrode in the circumferential direction. The bottom of the columnar quartz glass tube is of a conical necking structure, a guide tube is connected to the necking portion, and plasmas are ejected through the tail end of the guide tube. The device is reasonable in structural design and easy to operate; through the device, plasma jet flows for ablating the atherosclerotic plaques can be effectively generated; the generation method for the plasma jet flows is simple, easy to implement and high in controllability in the process.

Description

technical field [0001] The invention belongs to the technical field of biomedical equipment, and relates to a plasma device and a generation method for ablation of atherosclerotic plaque. Background technique [0002] Atherosclerosis is an inflammatory disease involving large and medium arteries. Stimulated by various risk factors, the arterial intima thickens, foam cells form, atherosclerotic plaques form, and plaques protrude into the lumen to form stenosis , plaque rupture under acute stress, inducing acute clinical events. Cardiovascular system diseases are the number one killer of deaths in most developed countries, and the most common of them is coronary atherosclerotic heart disease. The morbidity and mortality of coronary atherosclerotic heart disease in my country are on the rise, and it has become one of the top three causes of death together with cancer. At present, the treatment of coronary heart disease is mainly drug and surgical treatment. Surgical treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B18/18
Inventor 许德晖孔刚玉杨延洁陈海兰
Owner XI AN JIAOTONG UNIV
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