• Perinatology
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• 제29권4호
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• pp.180-184
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• 2018

In assisted reproductive techniques, monozygotic twinning is not influenced by the trial of reducing the number of embryos transferred. We present extremely rare case of monochorionic triamniotic triplet pregnancy following in vitro fertilization and two-embryo transfer. During the first trimester, the crucial ultrasound findings of monochorionic triamniotic triplet pregnancy are three distinct amniotic sacs forming a triangle or ipsilon zone within a single chorionic cavity. After prudential counseling about the potential risk of a monochorionic triamniotic triplet pregnancy with the patient, selective reduction of two fetuses via radiofrequency ablation was performed. We report a case of selective reduction for monochorionic triamniotic triplet pregnancy using radiofrequency ablation at 12 weeks' gestation and obstetric progression after radiofrequency ablation was uneventful until 20 weeks' gestation.

• Korean Journal of Radiology
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• 제19권6호
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• pp.1196-1197
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• 2018

• Journal of Chest Surgery
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• 제46권2호
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• pp.142-145
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• 2013

An increase in cardiac radiofrequency catheter ablation for treating refractory atrial fibrillation has resulted in an increased prevalence of complications. Among numerous complications of radiofrequency catheter ablation, atrio-esophageal fistula, although rare, is known to have fatal results. We report a case of successful management of an atrio-esophageal fistula as a complication of cardiac radiofrequency catheter ablation.

• 대한의용생체공학회:의공학회지
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• 제38권6호
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• pp.285-290
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• 2017

Radiofrequency catheter ablation is the interventional therapy that be employed to eliminate cardiac tissue caused by arrhythmias. During radiofrequency catheter ablation, The thrombus can occur at electrode tip if the temperature of tissue and electrode is excess $100^{\circ}C$. To prevent this phenomenon, we investigated numerical model of electrode for radiofrequency catheter ablation considering saline irrigation and temperature-controlled radiofrequency system. The numerical model is based on coupled electric-thermal-flow problem and solved by COMSOL Multiphysics software. The results of the models show that the dimensions of the thermal lesion are increased if the flow rate of the saline irrigation and the set temperature are increased. The surface width characterized to determine the thermal lesion isn't need to measure in temperature-controlled radiofrequency system due to convective heat transfer by saline irrigation at tissue-electrode interface.

• Korean Journal of Radiology
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• 제25권1호
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• pp.118-119
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• 2024

• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.5101-5106
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• 2015

Background: This systemic analysis was conducted to evaluate tumor recurrence rate and one-year survival rate for patients with liver metastases received radiofrequency ablation after transarterial chemoembolization and introduce a new method of radiofrequency ablation by puncture navigation technology for single liver metastases after transarterial chemoembolization. Materials and Methods: Clinical studies evaluating tumor recurrence rate and one-year survival rate. Appling the innova trackvision software to process one liver metastases received transarterial chemoembolization and using radiofrequency ablation by puncture navigation technology to treat the liver metastases. Results: 3 clinical studies which including 235 patients with liver metastases after transaeterial chemoembolization were considered eligible for inclusion. Systemic analysis suggested that tumor recurrence rate was 23% (54/235), one-year survival rate was 76% (178/235). The new procedure was performed successfully and the patient received a good prognosis. Conclusions: This systemic analysis suggests that radiofrequency ablation is a good method for liver metastases after transarterial chemoembolization and could receive a relatively good prognosis.

• 대한영상의학회지
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• 제84권5호
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• pp.999-1008
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• 2023

발생률이 높고, 예후는 좋지만 재발을 잘하는 경향이 있는 갑상선암에서도 전통적인 치료법은 수술이다. 하지만, 2000년대 초반부터, 간암, 폐암, 신장암에서와 마찬가지로 고주파 절제술이 원발 갑상선암 및 재발 갑상선암에 적용되기 시작했다. 원발암에서는 1 cm 이하 크기의 미세유두암 저위험군에서 수술 불가능한 경우에 대한 많은 연구가 이뤄져 왔고, 1 cm보다 더 크고 4 cm 이하의 다양한 군에 대해서도 일부 연구가 시행되었으며, 전반적으로 모두 양호한 결과를 보고하였다. 재발암에 대해서도 주로는 국소 경부 재발암에 고주파 절제술이 시행되었으며, 일부 폐, 뼈 등의 원격 전이에 대해서도 시도되었고, 전반적으로 양호한 결과가 보고되었다. 최근 들어, 한국, 미국, 유럽 등 각지에서 갑상선암의 고주파 절제술에 대해 옹호하는 움직임이 있다. 하지만, 미국 국립 종합 암 네트워크(National Comprehensive Cancer Network) 등의 중립적인 임상지침에는 고주파 절제술이 아직 인정되지는 않은 상태이다. 지금까지의 노력들과 미래의 연구를 바탕으로 향후 가까운 미래에 갑상선암의 치료에 있어 고주파 절제술이 적절한 자리매김을 할 것으로 전망한다.

• Journal of Chest Surgery
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• 제51권4호
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• pp.290-292
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• 2018

Radiofrequency ablation is an effective treatment for atrial fibrillation. Pulmonary vein stenosis/occlusion is one of its rare complications. Herein, the case of a 50-year-old man with hemoptysis and migratory pulmonary infiltrations after transcatheter radiofrequency ablation for atrial fibrillation is presented. Initially, pneumonia, interstitial pulmonary disease, or lung cancer was suspected, but wedge resection revealed hemorrhagic infiltrations. Chest computed tomography pulmonary angiography detected no left superior pulmonary vein due to its total occlusion, and left upper lobectomy was performed. Post-ablation pulmonary vein occlusion must be strongly suspected in cases of migratory pulmonary infiltrations and/or hemoptysis.

• 대한방사선협회지
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• 제30권1호
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• pp.58-62
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• 2004

The purpose of this study was to determine the factors influencing on the size of Radiofrequency ablation using an internally cooled needle electrodes in cattle liver. Ablation procedures involved the use of cool-tip RF system generator and internally coo

• The Korean Journal of Pain
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• 제27권1호
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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