title: [Thermal protection of targeted air instillation in CT-guided radiofrequency ablation].
abstract: OBJECTIVE
  To evaluate targeted intraperitoneal air instillation for the protection of adjacent structures at high-risk liver metastasis sites.
  
  
  METHODS
  On the basis of an interdisciplinary indication for radiofrequency ablation (RFA), targeted air instillation (up to 200 cc) was performed in 6 patients with a total of 6 liver metastases over an anterior or right lateral access route with a 22 G Chiba needle for the distension of the structures as well as protection against thermal damage from RFA in the close relationship of liver lesions to the stomach or colon.
  
  
  RESULTS
  In 6 patients (mean age approximately 66.3 years, 4 males, 2 females) with a risky location of a colorectal metastasis (liver segment III or VI), the targeted air instillation was performed between the liver and stomach (4 / 6) and colon (2 / 6). Protection against thermal damage was able to be established in 6 / 6 liver metastases prior to RFA. All tumor sites were ablated completely without the occurrence of complications requiring treatment.
  
  
  CONCLUSIONS
  The additional instillation of air into the peritoneum for distension and thermal protection is a useful extension of the RFA technique, which allows successful ablation at high-risk liver tumor sites and also allows interventional radiologists to treat tumor manifestations closely related to the colon or stomach.
authors: Institut für Diagnostische und Interventionelle Radiologie/Neuroradiologie, Westküstenklinikum Heide. paipman@web.de
authors: P
authors: P
authors: Kamusella
authors: P
authors: P
authors: Wiggermann
authors: C
authors: C
authors: Wissgott
authors: R
authors: R
authors: Andresen
authors: C
authors: C
authors: Stroszczynski
mesh_terms: D000368:Aged; D000388:Air; D002056:Burns / Q000000981:diagnostic imaging / Q000517:prevention & control*; D017115:Catheter Ablation / Q000295:instrumentation*; D003106:Colon / Q000293:injuries*; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007431:Intraoperative Complications / Q000000981:diagnostic imaging / Q000517:prevention & control*; D008113:Liver Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010477:Perfusion / Q000295:instrumentation*; D013270:Stomach / Q000293:injuries*; D025321:Surgery, Computer-Assisted / Q000295:instrumentation*; D036542:Tomography, Spiral Computed / Q000295:instrumentation*