Korean Journal of Radiology

  • 제15권2호
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  • Pages.235-244
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  • 2014
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  • 1229-6929(pISSN)
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  • 2005-8330(eISSN)
대한영상의학회 (The Korean Society of Radiology)
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Monopolar Radiofrequency Ablation Using a Dual-Switching System and a Separable Clustered Electrode: Evaluation of the In Vivo Efficiency

  • Yoon, Jeong Hee (Department of Radiology, Seoul National University Hospital) ;
  • Lee, Jeong Min (Department of Radiology, Seoul National University Hospital) ;
  • Hwang, Eui Jin (Department of Radiology, Seoul National University Hospital) ;
  • Hwang, In Pyung (Department of Radiology, Seoul National University Hospital) ;
  • Baek, Jeehyun (Department of Radiology, Seoul National University Hospital) ;
  • Han, Joon Koo (Department of Radiology, Seoul National University Hospital) ;
  • Choi, Byung Ihn (Department of Radiology, Seoul National University Hospital)
  • 투고 : 2013.06.30
  • 심사 : 2014.01.11
  • 발행 : 2014.04.01
⟨ 이전 논문 다음 논문 ⟩

초록

Objective: To determine the in vivo efficiency of monopolar radiofrequency ablation (RFA) using a dual-switching (DS) system and a separable clustered (SC) electrode to create coagulation in swine liver. Materials and Methods: Thirty-three ablation zones were created in nine pigs using a DS system and an SC electrode in the switching monopolar mode. The pigs were divided into two groups for two experiments: 1) preliminary experiments (n = 3) to identify the optimal inter-electrode distances (IEDs) for dual-switching monopolar (DSM)-RFA, and 2) main experiments (n = 6) to compare the in vivo efficiency of DSM-RFA with that of a single-switching monopolar (SSM)-RFA. RF energy was alternatively applied to one of the three electrodes (SSM-RFA) or concurrently applied to a pair of electrodes (DSM-RFA) for 12 minutes in in vivo porcine livers. The delivered RFA energy and the shapes and dimensions of the coagulation areas were compared between the two groups. Results: No pig died during RFA. The ideal IEDs for creating round or oval coagulation area using the DSM-RFA were 2.0 and 2.5 cm. DSM-RFA allowed more efficient RF energy delivery than SSM-RFA at the given time ($23.0{\pm}4.0kcal$ vs. $16.92{\pm}2.0kcal$, respectively; p = 0.0005). DSM-RFA created a significantly larger coagulation volume than SSM-RFA ($40.4{\pm}16.4cm^3$ vs. $20.8{\pm}10.7cm^3$; p < 0.001). Both groups showed similar circularity of the ablation zones (p = 0.29). Conclusion: Dual-switching monopolar-radiofrequency ablation using an SC electrode is feasible and can create larger ablation zones than SSM-RFA as it allows more RF energy delivery at a given time.

키워드

과제정보

연구 과제 주관 기관 : STARmed Co., Ltd.

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