The Development of a Minimally Invasive Radiofrequency Ablation Coil Electrode
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The VIVARF system (STARmed; Korea) became available in Japan in 2015. This system has an internally cooled electrode in which we can change the length of the active tip from 0.5 cm to 3 cm. We therefore performed experimental and clinical tests. At first, the electrode tip appeared too hyperechogenic. After two improvements, however, the visibility of the electrode became comparable to a conventional internally cooled electrode. Its efficacy and safety seemed comparable to a conventional electrode in clinical cases. This new adjustable RF electrode is more cost-effective in some cases and may have more potential than fixed tip electrodes.
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Lumbar disc herniation is a common and frequently-occurring disease in clinical.Radiofrequency ablation in the past decade has developed rapidly and achieved good results.The first generation of the RF electrode is unipolar electrode of the solid metal.Carbonation around the electrode increases the impedance,which reduces the current to prevent the further destruction of the tissue,so increasing the electrode needle from bipolar electrode needle to two-electrode,and non-negative electrode plate,has occurred.During ablation the current flows from the positive electrode needle to the negative electrode needle,greatly reducing the negative electrode plate burns on the skin,which is a practical,minimally invasive,safe,reusable,promising new technology with no influence on lumbar stability.
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This chapter contains sections titled: Introduction Scientific basis for radiofrequency ablation Radiofrequency ablation in renal cell carcinoma Radiofrequency ablation of localized prostate adenocarcinoma Conclusion References
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Radiofrequency ablation (RFA) study is a powerful test to diagnose arrhythmias accurately and help treating them effectively.Unlike many diseases of the heart, arrhythmias are normally hidden or be dormant.They come out and strike only when conditions are favorable for them.Electrophysiology (EP) and RFA study uses advanced computed technology to bring the arrhythmia out of its dormancy and shows how to get rid of it.Radiofrequency ablation is often used in conjunction with implantable cardioverter-defibrillator (ICD) therapy in the presence of recurrent ventricular tachycardia (VT) episodes to reduce the frequency of required ICD therapies.It is something like charming a dangerous snake out of its hole and getting rid of it so that there is no chance of it doing harm at all.
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Ablative techniques have been sought in many circumstances as alternatives to surgical resection/incision. Besides being minimally invasive, potential benefits of ablation include greater speed and improved access to target tissue compared with other surgical techniques. There is a wide variety of ablation technologies currently in use for medical treatment. These include but are not limited to tissue heating by radiofrequency (RF) current, microwaves, laser, and high intensity ultrasound. RF is among the most heavily used because of its relatively low complexity and cost. Ablative techniques have proven to be viable alternatives to surgical resection/incision of tissue. Although there are other means of tissue heating besides RF, RF is the most commonly used technique in operating rooms because of the reliability of transmural lesions and the low complexity of the system. Optimal systems account for the heterogeneous nature of tissue and variations in tissue property through the ablation cycle. It is important to monitor and assure adequate energy delivery by selecting the appropriate configuration of devices. Energy delivery varies between the various generators and systems, some more responsive than others with relative to changes in tissue impedance that will affect the end results of the operation.
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