Medical high-voltage narrow pulse generating device

Abstract

The invention relates to a medical high-voltage narrow pulse generating device used in the field of medical instruments. An existing high-voltage pulse generating device for PEF ablation has the problems that preheating is needed, heating in operation is severe, and the size is large. The medical high-voltage narrow pulse generating device comprises a circuit formed by connecting a grounded high-voltage power source, a current-limiting resistor, an electrode needle positive electrode contact and an electrode needle negative electrode contact in series; the circuit further comprises an air switch, a first coaxial cable and a second coaxial cable; the air switch comprises two conductors with tips; the distance between the two tips is adjustable; center copper wires of the two coaxial cablesare connected in series; the other ends of the center copper wires of the two coaxial cables are connected with an output circuit of the current-limiting resistor and one conductor respectively; two ends of a net-shaped conductive layer of the first coaxial cable are connected with a negative electrode of the high-voltage power supply and the electrode needle negative electrode contact; and two ends of a net-shaped conductive layer of the second coaxial cable are connected with the electrode needle positive electrode contact and the other conductor. According to the invention, the pulse amplitude can be accurately adjusted, preheating is not needed, the working temperature is low, and the size is small.

Description

technical field [0001] The invention relates to a high-voltage pulse generator in the field of medical equipment, in particular to a medical high-voltage narrow pulse generator. Background technique [0002] Atrial fibrillation is the most common arrhythmia, which can lead to stroke, and the morbidity rate, recurrence rate, disability rate and mortality rate are high, while the cure rate is low. The treatment of atrial fibrillation is mainly to restore the sinus rhythm of the heart itself. At present, pulmonary vein isolation through catheter radiofrequency ablation (RFA) is considered to be the mainstream method for the treatment of atrial fibrillation. However, due to the ablation mechanism of the thermal effect of radiofrequency current, this There are many problems in this type of ablation: 1) Long ablation time 2) High recurrence rate of atrial fibrillation after surgery 3) There is a risk of thrombus formation on the intima surface after ablation 4) The transmural prop...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved and the technical task proposed by the present invention are to overcome that the existing high-voltage pulse generating device used in PEF ablation needs long-term warm-up before it can be used, and the heat generated during work requires special insulating oil to dissipate heat, which leads to complex structure and increased volume. To solve such problems, the present invention provides a medical high-voltage narrow pulse generating device, which can precisely adjust the pulse amplitude within a fixed pulse width, and can work without preparing for a long time for warm-up, and The working temperature of the device can also be kept at room temperature, without insulating oil heat dissipation treatment, effectively reducing the size of the device

Images