• The Korean Journal of Pain
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• v.19 no.2
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• pp.282-284
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• 2006

Percutaneous radiofrequency thermocoagulation has been applied in patients with various forms of chronic pain, such as facet joint pain, cancer pain and trigeminal neuralgia. A major portion of the hip joint is innervated by the articular branches of the femoral and obturator nerves. Radiofrequency thermocoagulation of the articular branches of the obturator and femoral nerves can be a good alternative treatment for patients with hip joint pain, especially in those where surgery is not applicable. A patient suffering hip joint pain due to metastatic cancer underwent multiple radiofrequency lesioning of the femoral and obturator nerves at $80^{\circ}C$ for 120 seconds, using a Racz-Finch Kit. The patient experienced about a 50% reduction in the pain, without any numbness or other side effects.

• Journal of Dental Anesthesia and Pain Medicine
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• v.22 no.1
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• pp.67-70
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• 2022

Persistent idiopathic facial pain is a rare and difficult condition to treat. Several pharmacological, nonpharmacological, and invasive treatment options have been used, with varying results. We report the case of a patient with intractable persistent idiopathic facial pain who responded favorably to a combination of botulinum toxin injections and pulsed radiofrequency treatment of the infraorbital nerve.

• Journal of information and communication convergence engineering
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• v.14 no.3
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• pp.191-199
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• 2016

In this study, we investigate the safety requirements and test methods of a radiofrequency stimulator. The main test items include controls of a minimum output, accommodation range, and output parameters that have been known as the safety requirements in conformity with international standards. As the test criteria for controlling the minimum output, an increase or decrease in a unit of 1 mA or 1 V or less was applied to the output amplitude regulator for both continuous and discontinuous control, and the output at the minimum setting was manipulated to not exceed 2% of the maximum setting. For controlling the output parameters, one of the representative test criteria states that the current limit of 250 mA should be equal to or less than 1,500 Hz. Consequently, when applying the radiofrequency stimulator on the human body, we need to ensure that the safety requirements conform to the international standards.

• The Korean Journal of Pain
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• v.14 no.2
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• pp.261-265
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• 2001

Radiofrequency thermocoagulation of the gasserian ganglion is a safe procedure that can be controlled well and provides satisfactory pain relief from trigeminal neuralgia with low risk. Here the authors report a case of radiofrequency thermocoagulation performed on a recurred trigeminal neuralgia patient, with particular attention to the V3 area. The patient was treated with microvascular decompression 7 years previous, which lead to untolerable side effects from carbamazepine medication. Following the paresthesia and masseter muscle contracture test at 50 Hz-0.06 volt and 2 Hz-0.5 volt respectively, RF lesionings were performed for 60 sec at $60^{\circ}C$ and 70 sec at $70^{\circ}C$. One week after the procedure, the pain was reduced with a mild hypoesthesia in the V2 area. After 6 months, the pain recurred. Therefore, we performed the same procedure again. After 8-months of follow-up, there has been no pain or complications.

• The Korean Journal of Pain
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• v.27 no.1
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• pp.72-76
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• 2014

A 57-year-old male patient had myeloma. He had severe pain in the left clavicle that did not respond to radiotherapy; therefore, it was treated with radiofrequency thermal ablation (RFTA). Under fluoroscopic guidance, two RF needles at a distance of 1.5 cm from each other were inserted into the mass and conventional radiofrequency ($90^{\circ}C$ and 60 seconds) at two different depths (1 cm apart) was applied. Then, 2 ml of 0.5% ropivacaine along with triamcinolone 40 mg was injected in each needle. The visual analogue pain score (VAS from 0 to 10) was decreased from 8 to 0. In the next 3 months of follow-up, the patient was very satisfied with the procedure and the mass gradually became smaller. There were no complications. This study shows that RFTA could be a useful method for pain management in painful osteolytic myeloma lesions in the clavicle

• Journal of Korean Neurosurgical Society
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• v.40 no.2
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• pp.95-98
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• 2006

Objective : The aim of this study is to evaluate the feasibility, safety and effectiveness of radiofrequency neurotomy[RFN] for remnant pain after vertebroplasty for the treatment of severe compression fracture. Methods : 25 patients with remnant pain after vertebroplasty for one level severe compression fracture were treated by RFN. The severe compression fractures were defined to the vertebrae which less than 50% of their original heights have collapsed. Pain relief was evaluated at 2 weeks, 6 weeks and 3 months after the procedure using a visual analog scale[VAS]. Results : Successful outcome was determined if pain reduction exceeded 50% on the VAS at 6 weeks. Six of the 25 patients did not respond favorably to RFN [pain reduction less than 50%], and nineteen patients showed successful responses. Mean VAS score was decreased from 5.48 to 2.96 at 6 weeks. Conclusion : The radiofrequency neurotomy may be both feasible and useful treatment for the remnant pain after vertebroplasty. However long-term follow up is needed to confirm the effectiveness.

• Journal of Korean Neurosurgical Society
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• v.54 no.2
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• pp.136-138
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• 2013

A 65-year-old male presented with pain in his right medial calf. An imaging study revealed no acute lesions, and a diagnosis of saphenous neuralgia was made by a nerve conduction study. He received temporary pain relief with saphenous nerve blocks twice in a one-week interval. Pulsed radiofrequency neuromodulation reduced pain to 10% of the maximal pain intensity. At 6 months after the procedure, the pain intensity was not aggravated even without medication. Pulsed radiofrequency neuromodulation of the saphenous nerve may offer an effective and minimally invasive treatment for patients with saphenous neuralgia who are refractory to conservative management.

• The Korean Journal of Pain
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• v.19 no.2
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• pp.244-248
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• 2006

Radiofrequency lesioning is a valuable tool for third occipital headache. Relative to most neural targets, a radiofrequency lesion is very small. Reliable pre-operative diagnosis of the nociceptive source is critical, as inappropriately placed lesions will not modulate pain. Knowledge of the anatomical courses of nerves and extremely precise electrode placement are required for accurate lesioning. This report describes our experience with RF lesioning in the treatment of chronic pain in two patients who suffered from third occipital headaches. In one patient, satisfactory improvement of the pain was observed after 10 months of follow up.

• The Korean Journal of Pain
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• v.12 no.1
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• pp.128-131
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• 1999

Stellate ganglion block is a well established method for the management of certain pain syndromes (e.g., chronic regional pain syndrome, facial pain) in the cervicothoracic region and upper extremity. The stellate ganglion resides between the C7 transverse process and the head of the first rib. Anesthetic injections for the stellate ganglion block are typically made at the level of the transverse process of either the C6 or C7 vertebrae to avoid the pleura, vessels, and nerve roots. Method of positioning the needle tip directly at the ganglion has been described, but are problematic because of the risk of injury to or injection into adjacent structures. It is necessary to know the exact anatomic position of the stellate ganglion when permanent blockade is required by means of radiofrequency thermocoagulation. Whereas fluroscopy shows only bony feature, computerized tomography also images nerves, vessels, and lung, allowing accruate needle placement. We report a case of the percutaneous radiofrequency thermocoagulation of the stellate ganglion after computerized tomography-guided localization.

• The Korean Journal of Pain
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• v.12 no.1
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• pp.162-167
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• 1999

We have observed discitis developed after Intradiscal radiofrequency thermocoagulation in a patient with chronic discogenic low back pain. Recently, it is becoming more common that pain-managers perform disc-manipulation or, a nerve block after penetrating a disc, so postprocedural infection of disc can be a problem. To prevent discitis, very carefull attention must be given to ensure aseptic conditions during this procedure. However, if it occurs, it needs to be treated properly. In this case, a good result was obtained by treatment with absolute bed rest, pain management, and antibiotics.