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Shah IA, Seol HY, Cho Y, Ji W, Seo J, Lee C, Chon MK, Shin D, Kim JH, Choo KS, Park J, Kim J, Yoo H, Kim JH. Conversion of the bronchial tree into a conforming electrode to ablate the lung nodule in a porcine model. COMMUNICATIONS MEDICINE 2023; 3:129. [PMID: 37775526 PMCID: PMC10541426 DOI: 10.1038/s43856-023-00362-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 09/15/2023] [Indexed: 10/01/2023] Open
Abstract
BACKGROUND Radiofrequency ablation (RFA) is one of the treatment options for lung nodules. However, the need for exact delivery of the rigid metal electrode into the center of the target mass often leads to complications or suboptimal results. To overcome these limitations, a concept of conforming electrodes using a flexible material has been tested in this study. METHODS A bronchoscopy-guided RFA (CAROL) under a temperature-controlled mode was tested in in-vivo and ex-vivo porcine lungs. Gallium-based liquid metal was used for turning the bronchial tree into temporary RF electrodes. A customized bronchoscopy-guided balloon-tipped guiding catheter (CAROL catheter) was used to make the procedure feasible under fluoroscopy imaging guidance. The computer simulation was also performed to gain further insight into the ablation results. Safety was also assessed including the liquid metal remaining in the body. RESULTS The bronchial electrode injected from the CAROL catheter was able to turn the target site bronchial air pipe into a temporally multi-tined RF electrode. The mean volume of Gallium for each effective CAROL was 0.46 ± 0.47 ml. The ablation results showed highly efficacious and consistent results, especially in the peripheral lung. Most bronchial electrodes were also retrieved by either bronchoscopic suction immediately after the procedure or by natural expectoration thereafter. The liquid metal used in these experiments did not have any significant safety issues. Computer simulation also supports these results. CONCLUSION The CAROL ablation was very effective and safe in porcine lungs showing encouraging potential to overcome the conventional approaches.
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Affiliation(s)
- Izaz Ali Shah
- Department of Electronic Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Hee Yun Seol
- Department of Internal Medicine, School of Medicine, Pusan National University, Pusan National University Yangsan Hospital, Research Institute for Convergence of Biomedical Science and Technology, Yangsan, Republic of Korea
| | - Youngdae Cho
- Department of Electronic Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Wonjun Ji
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jaeyoung Seo
- Department of R&D Center, Tau Medical Inc, Busan, Republic of Korea
| | - Cheolmin Lee
- Department of R&D Center, Tau Medical Inc, Busan, Republic of Korea
| | - Min-Ku Chon
- Department of Cardiology, School of Medicine & Cardiovascular center, Pusan National University & Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Donghoon Shin
- Department of Pathology, School of Medicine, Pusan National University & Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Justin H Kim
- Department of R&D Center, Tau Medical Inc, Busan, Republic of Korea
| | - Ki-Seok Choo
- Department of Radiology, School of Medicine & Medical Research Institute, Pusan National University & Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Junhui Park
- Major of Human Bioconvergence, College of Information Technology and Convergence, Pukyong National University, Busan, Republic of Korea
| | - Juhyung Kim
- Department of Physiology, University of Toronto, Toronto, Canada
| | - Hyoungsuk Yoo
- Department of Electronic Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
| | - June-Hong Kim
- Department of Cardiology, School of Medicine & Cardiovascular center, Pusan National University & Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
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Li N, Huber TC. Radiofrequency Ablation for Benign Thyroid Nodules: Radiology In Training. Radiology 2023; 306:54-63. [PMID: 36066365 DOI: 10.1148/radiol.220116] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two patients, one with benign nonfunctioning nodules and one with functioning thyroid nodules, both of whom underwent radiofrequency ablation, are presented. Preprocedural evaluation, procedural considerations, and follow-up care of thyroid radiofrequency ablation, as well as published evidence on the topic, are discussed.
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Affiliation(s)
- Ningcheng Li
- From the Dotter Department of Interventional Radiology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239
| | - Timothy C Huber
- From the Dotter Department of Interventional Radiology, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239
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Smolock AR, Gogineni V, Koch K, Bradley C, Tutton SM, White SB. Vertebral Body Bone Ablation with and without a Saline-Infused System in a Porcine Model. J Vasc Interv Radiol 2022; 34:619-622.e1. [PMID: 36596322 DOI: 10.1016/j.jvir.2022.12.475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 12/20/2022] [Accepted: 12/25/2022] [Indexed: 01/01/2023] Open
Abstract
The purpose of this study was to evaluate the effect of bone radiofrequency (RF) ablation in the spine with and without controlled saline infusion. RF ablation with and without controlled saline infusion was performed in the vertebral bodies of 2 swine with real-time temperature and impedance recordings. Histology and magnetic resonance (MR) imaging results were reviewed to evaluate the ablation zone size, breach of spinal canal, and damage to the spinal cord and nerves. There was no difference in maximum and mean temperatures between controlled saline and noninfusion groups. The impedance and power output were not significantly different between the groups. MR imaging and histopathology demonstrated ablation zones confined within the vertebral bodies. Ablation zone size correlated on MR imaging and histopathology by groups. No ablation effect, breach of posterior cortex, spinal cord injury, or nerve or ganglion injury was observed at any level using MR imaging or histology. Controlled saline infusion does not appear to impact bone RF ablation and, specifically, does not increase the ablation zone size.
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Affiliation(s)
- Amanda R Smolock
- Division of Vascular and Interventional Radiology, Department of Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin.
| | | | - Kevin Koch
- Department of Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Charles Bradley
- Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, Pennsylvania
| | - Sean M Tutton
- Division of Vascular and Interventional Radiology, Department of Radiology, University of California San Diego, La Jolla, California
| | - Sarah B White
- Division of Vascular and Interventional Radiology, Department of Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin
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Ashikbayeva Z, Aitkulov A, Atabaev TS, Blanc W, Inglezakis VJ, Tosi D. Green-Synthesized Silver Nanoparticle-Assisted Radiofrequency Ablation for Improved Thermal Treatment Distribution. NANOMATERIALS 2022; 12:nano12030426. [PMID: 35159771 PMCID: PMC8840672 DOI: 10.3390/nano12030426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 12/21/2022]
Abstract
Thermal ablation therapy is known as an advantageous alternative to surgery allowing the treatment of multiple tumors located in hard-to-reach locations or treating patients with medical conditions that are not compatible with surgery. Appropriate heat propagation and precise control over the heat propagation is considered a weak point of thermal ablation therapy. In this work, silver nanoparticles (AgNPs) are used to improve the heat propagation properties during the thermal ablation procedure. Green-synthesized silver nanoparticles offer several attractive features, such as excellent thermal conductivity, biocompatibility, and antimicrobial activity. A distributed multiplexed fiber optic sensing system is used to monitor precisely the temperature change during nanoparticle-assisted radiofrequency ablation. An array of six MgO-based nanoparticles doped optical fibers spliced to single-mode fibers allowed us to obtain the two-dimensional thermal maps in a real time employing optical backscattering reflectometry at 2 mm resolution and 120 sensing points. The silver nanoparticles at 5, 10, and 20 mg/mL were employed to investigate their heating effects at several positions on the tissue regarding the active electrode. In addition, the pristine tissue and tissue treated with agarose solution were also tested for reference purposes. The results demonstrated that silver nanoparticles could increase the temperature during thermal therapies by propagating the heat. The highest temperature increase was obtained for 5 mg/mL silver nanoparticles introduced to the area close to the electrode with a 102% increase of the ablated area compared to the pristine tissue.
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Affiliation(s)
- Zhannat Ashikbayeva
- School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Ave., Nur-Sultan 010000, Kazakhstan;
- Correspondence:
| | - Arman Aitkulov
- Department of Information Engineering, University of Padova, Via Gardenigo 6/A, 35131 Padova, Italy;
| | - Timur Sh. Atabaev
- Department of Chemistry, Nazarbayev University, 53 Kabanbay Batyr Ave., Nur-Sultan 010000, Kazakhstan;
| | - Wilfried Blanc
- Université Côte d’Azur, INPHYNI, UMR7010, CNRS, Parc Valrose, 06108 Nice, France;
| | - Vassilis J. Inglezakis
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose St., Glasgow G1 1XJ, UK;
| | - Daniele Tosi
- School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Ave., Nur-Sultan 010000, Kazakhstan;
- National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave., Nur-Sultan 010000, Kazakhstan
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