Thermometry during coblation and radiofrequency ablation of vertebral metastases: a cadaver study

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• 作者：Simon F. Groetz (1)
  Klaus Birnbaum (2)
  Carsten Meyer (1)
  Holger Strunk (1)
  Hans H. Schild (1)
  Kai E. Wilhelm (1)
  
• 关键词：Spine ; Metastases ; RFA ; Coblation
• 刊名：European Spine Journal
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：22
• 期：6
• 页码：1389-1393
• 全文大小：297KB
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• 作者单位：Simon F. Groetz (1)
  Klaus Birnbaum (2)
  Carsten Meyer (1)
  Holger Strunk (1)
  Hans H. Schild (1)
  Kai E. Wilhelm (1)
  
  1. Department of Radiology, University Hospital Bonn, Sigmund-Freud-Strasse 25, 53127, Bonn, Germany
  2. Orthopaedic Clinic Hennef, Adenauerplatz 1, 53773, Hennef, Germany
  
• ISSN：1432-0932

文摘

Purpose To evaluate safety of coblation of simulated lytic metastases in human cadaveric vertebral bodies by measuring heat distribution during thermal tissue ablation and comparing it to radiofrequency ablation (RFA). Materials and methods Three devices were compared: a 10?mm single-needle RFA electrode, a 20?mm array RFA electrode and the coblation device. To simulate bone metastases, a spinal tumor model was used stuffing a created lytic cavity with muscle tissue. Measuring of heat distribution was performed during thermal therapy within the vertebral body, in the epidural space and at the ipsilateral neural foramen. Eight vertebral bodies were used for each device. Results Temperatures at heat-sensitive neural structures during coblation were significantly lower than using RFA. Maximum temperatures measured at the end of the procedure at the neural foramen: 46.4?°C (±2.51; RFA 10?mm), 52.2?°C (±5.62; RFA 20?mm) and 42.5?°C (±2.88; coblation). Maximum temperatures in the epidural space: 46.8?°C (±4.7; RFA 10?mm), 49.5?°C (±6.48; RFA 20?mm) and 42.1?°C (±2.5; coblation). Maximum temperatures measured within the vertebral body: 50.6?°C (±10.48; RFA 10?mm), 61.9?°C (±15.39; RFA 20?mm) and 54.4?°C (±15.77; coblation). Conclusion In addition to RFA, the application of coblation is a safe method to ablate vertebral lesions with regards to heat distribution at heat-sensitive neural spots. The measured temperatures did not harbor danger of thermal damage to the spinal cord or the spinal nerves.