Radiofrequency ablation devices 2017
Oct 2, 2017, 08:24
Background
Radiofrequency ablation (RFA) uses thermal energy to accomplish targeted tissue destruction. Within the GI tract, RFA was initially studied for the treatment of dysplastic Barrett’s esophagus (BE), and this continues to be a common application. Indications for RFA within the GI tract continue to evolve. It has been used in the treatment of esophageal squamous cell dysplasia, gastric antral vascular ectasia (GAVE), radiation proctopathy, cholangiocarcinoma, and pancreatic neoplasia, among other conditions.1, 2, 3, 4, 5, 6, 7, 8, 9 This report focuses on devices and techniques used to perform RFA in the GI tract.
Technology under review
RFA devices use an electrosurgical generator connected to bipolar electrode arrays to deliver thermal energy to tissue. Electricity travels through tissue between alternating positive and negative poles along the electrode arrays of the RFA device in the radiofrequency range of 450 to 500 kHz. This current generates thermal energy within tissue in direct contact with the radiofrequency (RF) electrode, resulting in coagulation necrosis of the targeted tissue. The spacing and geometry of the electrodes on the RFA device and the preset parameters (energy, power) within the RFA generator allow achievement of a consistent depth of ablation. For instance, in the treatment of mucosal pathologic conditions, the dosimetry is designed to yield an ablation depth to the muscularis mucosae (700-800 μm deep).10, 11
Title : Radiofrequency ablation devices 2017
URL :
Doi org link : http://dx.doi.org/10.1016/j.vgie.2017.06.002
Volume : VideoGIE October 2017 Volume 2, Issue 10, Pages 252–259
Select a choice : Keep
Content created : Sep 28, 2017, 23:00
ExternalPK :
File size :
Categories : - Ablation
- Lower GI
- Upper GI
PIIS2468448117301121