Geometry and temperature distribution during radiofrequency tissue ablation: an experimental ex vivo model.

Purpose: To investigate the temperature distribution and geometry of lesions created by radiofrequency (RF) tissue ablation.

Materials And Methods: We developed an ex-vivo thermal model based on the ability of egg whites to coagulate at 62 degrees to 65 degrees C. This property allows us to observe and record the formation of "lesions" created by different commercially available RF generators and probes.

Radiofrequency interstitial tissue ablation: wet electrode.

Minimally invasive methods for destroying tissue have been investigated for more than a decade, and growing interest has emerged in small probe or needle ablative techniques. Many energy sources that freeze or heat tissue have been studied. This paper discusses radiofrequency (RF) thermal therapy as delivered by the saline-augmented ("wet" or virtual) electrode.

Estimation of acute blood loss in the anticoagulated rabbit model using 3 modalities of radio frequency energy ablation.

Purpose: An anticoagulated animal model was tested to evaluate estimated acute blood loss (EABL) following tissue ablation with 3 modalities of radio frequency (RF) thermal energy.

Materials And Methods: Four groups of randomly divided rabbits were established. Group 1 (3 control and 3 anticoagulated rabbits) underwent sham treatment (noRF), group 2 (2 control and 7 anticoagulated) received single probe dry RF (dRF) (475 KHz and 5 W for 2 minutes), group 3 (2 control and 7 anticoagulated) received single probe wet RF (wRF) (475 KHz with 14.