High-powered gas-cooled microwave ablation: shaft cooling creates an effective stick function without altering the ablation zone.

AJR. American Journal of Roentgenology
Erica M KnavelChristopher L Brace

Abstract

The purpose of our study was to validate the ability of a new gas-cooled microwave device to secure antennas into tissue before ablation via shaft cooling and to verify that such cooling does not compromise the intended ablation. The force required to extract several types of applicators from ex vivo bovine liver before and after ablation was measured. Six groups were compared: cooled needle and multitined radiofrequency electrodes, secured and unsecured cryoprobes, and gas-cooled microwave antennas (n = 6 each). Ablations were next created in in vivo porcine livers for 2 and 10 minutes (n = 6 each) using the gas-cooled microwave system at 140 W. Extraction force was again measured before and after ablation and compared between groups using analysis of variance with post hoc Student t tests. Histologic analysis of the ablation zone was performed to evaluate cellular necrosis along the antenna shaft. Ex vivo, the secured cryoprobe and microwave antenna required significantly more force to remove than unsecured radiofrequency, cryoprobe, and microwave applicators (p < 0.05, all comparisons). The multitined radiofrequency electrode and cooled radiofrequency electrode required significantly more force to remove after ablation than ...Continue Reading

References

Jan 3, 2001·AJR. American Journal of Roentgenology·T de BaereA Roche
Sep 7, 2002·Urology·John C SalikenJohn C Rewcastle
Aug 31, 2004·AJR. American Journal of Roentgenology·Karin SteinkeDavid L Morris
Dec 15, 2007·IEEE Transactions on Microwave Theory and Techniques·Christopher L BraceFred T Lee
Jan 31, 2009·Current Problems in Diagnostic Radiology·Christopher L Brace
Mar 21, 2009·Current Problems in Diagnostic Radiology·Christopher L Brace

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Citations

Sep 11, 2014·Radiographics : a Review Publication of the Radiological Society of North America, Inc·J Louis HinshawChristopher L Brace
Mar 4, 2014·Journal of Vascular and Interventional Radiology : JVIR·Jeremy C HornAaron M Fischman
Nov 19, 2013·Techniques in Vascular and Interventional Radiology·Erica M Knavel, Christopher L Brace
Apr 16, 2014·IEEE Transactions on Bio-medical Engineering·J F BaiL X Xu
Nov 15, 2014·Cardiovascular and Interventional Radiology·Anna J MorelandChristopher L Brace
Dec 18, 2016·Cardiovascular and Interventional Radiology·Miltiadis E KrokidisAndy Adam
Aug 6, 2016·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Thomas P Ryan, Christopher L Brace
Dec 14, 2016·World Journal of Gastroenterology : WJG·Mirko D'OnofrioClaudio Bassi
Jun 9, 2015·World Journal of Hepatology·Loukia S PoulouLoukas Thanos
Nov 12, 2015·World Journal of Hepatology·Guido PoggiChiara Picchi
May 12, 2018·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Sergio SartoriClaudio Maurizio Pacella
Mar 29, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Hangming HuangBing Zhang

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