Needle electrode for radiofrequency ablation

Abstract

The invention discloses a needle electrode for radiofrequency ablation. The needle electrode comprises a handle, an electrode working end, a power line, a front sleeve, a rear sleeve and a spring, thetwo ends of the handle are connected to the front sleeve and the rear sleeve respectively, the spring is located in the front sleeve, the front end of the rear sleeve is located in the front sleeve,and the rear sleeve can move along the inner wall of the front sleeve; a front chuck is arranged at the front end of the front sleeve, and a tail chuck and a rear chuck are arranged at the front end and the rear end of the rear sleeve respectively; a protective hose and a conductive wire are arranged in the electrode working end, a gap is formed between the electrode working end and the protectivehose, the conductive wire is located in the protective hose, the front ends of the protective hose and the conductive wire are connected to an electrode tool bit, the rear end of the conductive wireis connected to the power line, and the electrode tool bit extends out of the front end of the electrode working end; and the front chuck and the tail chuck are fixedly connected to the electrode working end. The needle electrode has the advantages that the electrode tool bit is bendable, controllable in locking, flushable, large in ablation range, and accurate and controllable in a treatment area.

Description

technical field [0001] The invention relates to a medical instrument for spinal surgery, in particular to a needle-shaped electrode for radiofrequency ablation. Background technique [0002] Lumbar disc herniation is a common and frequently-occurring disease in clinical spine surgery. The diagnosis can be confirmed after the spine surgeon’s clinical examination and imaging examination. There are many methods for the treatment of lumbar disc herniation, among which minimally invasive low-temperature plasma radiofrequency ablation Surgery is one of the new technologies for the treatment of lumbar disc herniation in the world. The principle of low-temperature plasma radiofrequency ablation is: apply radiofrequency energy to the interior of the intervertebral disc through the plasma knife, vaporize and ablate part of the nucleus pulposus tissue of the intervertebral disc, and then use precise thermal shrinkage technology to heat the nucleus pulposus tissue in contact with the kn...

AI Technical Summary

Problems solved by technology

[0003] The electrode blades of radiofrequency ablation needles currently used cannot be bent. When entering the intervertebral disc for ablation, they can only ablate within a limited range. The treatment range is relatively small and cannot be precisely controlled, so the surgical effect is not ideal.

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