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Radiofrequency lesioning

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https://www.readbyqxmd.com/read/28750317/advantages-of-cooled-fiber-for-monitoring-laser-tissue-ablation-through-temporal-and-spectral-analysis-of-rf-ultrasound-signal-a-case-study
#1
Simona Granchi, Enrico Vannacci, Luca Breschi, Elena Biagi
The promising minimally invasive laser thermal therapy technique may be improved if thermal lesions induced into the tissue can be carefully monitored in extension and morphology during the treatment. According to results obtained in several recent experimentations, solutions that avoid tissue carbonization during the treatment have been proposed, in order to allow deeper and longer lasting light penetration in treated tissue and to reduce failures of the applicator tip and fiber optic, dangerous for patients...
July 19, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28749166/ablative-safety-margin-depicted-by-fusion-imaging-with-post-treatment-contrast-enhanced-ultrasound-and-pre-treatment-cect-cemri-after-radiofrequency-ablation-for-liver-cancers
#2
Xiao-Wan Bo, Hui-Xiong Xu, Le-Hang Guo, Li-Ping Sun, Xiao-Long Li, Chong-Ke Zhao, Ya-Ping He, Bo-Ji Liu, Dan-Dan Li, Kun Zhang, Dan Wang
OBJECTIVES: To evaluate the value of fusion imaging with post-treatment contrast-enhanced ultrasound (CEUS) and pre-treatment contrast-enhanced computed tomography/magnetic resonance imaging (CECT/CEMRI) in evaluating ablative safety margin after percutaneous ultrasound (US)-guided radiofrequency ablation (RFA) for liver cancers. METHODS: 34 consecutive patients with 47 liver lesions who had undergone RFA were included. Fusion imaging with post-treatment CEUS and pre-treatment CECT/CEMRI was carried out to evaluate local treatment response and ablative safety margin within 1-3 days after RFA...
July 27, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28747272/efficacy-and-safety-of-radiofrequency-ablation-for-focal-hepatic-lesions-adjacent-to-gallbladder-reconfiguration-of-the-ablation-zone-through-probe-relocation-and-ablation-time-reduction
#3
In Young Choi, Pyo Nyun Kim, Sung Gu Lee, Hyung Jin Won, Yong Moon Shin
PURPOSE: To evaluate the safety and efficacy of radiofrequency (RF) ablation for treatment of focal hepatic lesions adjacent to the gallbladder with electrode relocation and ablation time reduction. MATERIALS AND METHODS: Thirty-nine patients who underwent RF ablation for focal hepatic lesions adjacent to the gallbladder (≤ 10 mm) were evaluated retrospectively from January 2011 to December 2014 (30 men and 9 women; age range, 51-85 y; mean age, 65 y). Of 36 patients with hepatocellular carcinoma, 3 had a second treatment for recurrence (mean tumor size, 15 mm ± 6)...
July 23, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28744082/ct-guided-percutaneous-radiofrequency-ablation-of-osteoid-osteoma-our-experience-in-87-patients
#4
Anurag Chahal, Prathiba Rajalakshmi, Shah A Khan, Shishir Rastogi, Deep N Srivastava, Shivanand Gamanagatti
PURPOSE: To evaluate the technical and clinical success of radiofrequency ablation of osteoid osteoma and analyze the factors responsible for clinical success. We also tried to investigate the role of follow-up computed tomography (CT) imaging. MATERIALS AND METHODS: This is a prospective study approved by the institute's ethics committee involving 87 patients with appendicular osteoid osteoma. CT-guided radio frequency ablation was performed using a bipolar ablation system...
April 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28744081/early-outcomes-of-radiofrequency-ablation-in-unresectable-metastatic-colorectal-cancer-from-a-tertiary-cancer-hospital-in-india
#5
Suyash Kulkarni, Nitin S Shetty, Ashwin M Polnaya, Sushil Patil, Kunal Gala, Rahul Chivate, Vikas Ostwal, Anant Ramaswamy, Shailesh V Shrikhande, Mahesh Goel, Shraddha Patkar, Manish Bhandare, Venkatesh Rangarajan, Purandare Nilendu
AIMS: The study was carried out to evaluate the early outcomes using Radiofrequency Ablation (RFA) for unresectable liver metastases in the management of metastatic colorectal cancer (mCRC) from an area of low endemicity. MATERIAL AND METHODS: 60 Patients with unresectable colorectal liver metastases had undergone 88 sessions of RFA from January 2007 till December 2013. The results were retrospectively analysed to evaluate the outcomes in terms of efficacy and survival rates...
April 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28741577/comparison-of-new-generation-renal-artery-denervation-systems-assessing-lesion-size-and-thermodynamics-using-a-thermochromic-liquid-crystal-phantom-model
#6
Sara I Al Raisi, Michael T Barry, Pierre Qian, Abhishek Bhaskaran, Jim Pouliopoulos, Pramesh Kovoor
AIM: To evaluate and compare lesion dimensions and thermodynamics of the new generation multi-electrode Symplicity Spyral and the new generation multi-electrode EnligHTN renal artery denervation systems, using a thermochromic liquid crystal phantom model. METHODS AND RESULTS: A previously described renal artery phantom model was used as a platform for radiofrequency ablation. A total of 32 radiofrequency ablations were performed using multi-electrode Symplicity Spyral (n=16) and new generation EnligHTN systems (n=16)...
July 25, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28733782/catheter-ablation-of-atrial-fibrillation-an-overview-for-clinicians
#7
REVIEW
Nebojša Mujović, Milan Marinković, Radoslaw Lenarczyk, Roland Tilz, Tatjana S Potpara
Catheter ablation (CA) of atrial fibrillation (AF) is currently one of the most commonly performed electrophysiology procedures. Ablation of paroxysmal AF is based on the elimination of triggers by pulmonary vein isolation (PVI), while different strategies for additional AF substrate modification on top of PVI have been proposed for ablation of persistent AF. Nowadays, various technologies for AF ablation are available. The radiofrequency point-by-point ablation navigated by electro-anatomical mapping system and cryo-balloon technology are comparable in terms of the efficacy and safety of the PVI procedure...
July 21, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28731366/chondromyxoid-fibroma-of-the-distal-fibula-treated-by-percutaneous-radiofrequency-ablation
#8
Tamar Berenstein-Weyel, Ehud Lebel, Daniela Katz, Yaakov Applbaum, Amos Peyser
BACKGROUND: Percutaneous radiofrequency ablation (RFA) has been shown to be an effective treatment for soft tissue lesions and also benign bone tumors, especially osteoid osteoma. There are limited data regarding this technique in other bone tumors, specifically larger and more aggressive ones. PURPOSES: To describe the use of RFA as a definitive treatment and an alternative to traditional open surgery for the treatment of chondromyxoid fibroma (CMF), a benign but locally aggressive bone tumor...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28730773/thermal-ablation-may-improve-outcomes-in-patients-with-colorectal-liver-metastasis-a-case-control-study
#9
Loukia S Poulou, Loukas Thanos, Panayiotis D Ziakas, Emmanouel Merikas, Apostolos Achimastos, Constantine Gennatas, Konstantinos N Syrigos
PURPOSE: Local thermal ablation may extend the scope of palliative therapy in patients with colorectal liver metastasis. We performed a retrospective, case-controlled study to compare patients with colorectal liver metastases that were treated with percutaneous radiofrequency (RF) or microwave (MW) thermal ablation, against the control group of chemotherapy alone. METHODS: We described baseline demographics, ablation sessions, procedure duration and related complications...
May 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28723304/the-quest-for-durable-lesions-in-catheter-ablation-of-atrial-fibrillation-technological-advances-in-radiofrequency-catheters-and-balloon-devices
#10
Tilman Maurer, Karl-Heinz Kuck
Atrial fibrillation is the most common cardiac arrhythmia and represents a growing clinical, social and economic challenge. Catheter ablation for symptomatic atrial fibrillation has evolved from an experimental procedure into a widespread therapy and offers a safe and effective treatment option. A prerequisite for durable PVI are transmural and contiguous circumferential lesions around the pulmonary veins. However, electrical reconnection of initially isolated pulmonary veins remains a primary concern and is a dominant factor for arrhythmia recurrence during long-term follow up...
July 19, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28722702/radiofrequency-ablation-of-hepatic-tumor-subjective-assessment-of-the-perilesional-vascular-network-on-contrast-enhanced-computed-tomography-before-and-after-ablation-can-reliably-predict-the-risk-of-local-recurrence
#11
Sireesha Yedururi, Silanath Terpenning, Sanjay Gupta, Patricia Fox, Sooyoung Shin Martin, Claudius Conrad, Evelyne M Loyer
OBJECTIVE: To determine whether simple, subjective analysis of the perilesional vascular network can predict the risk of local recurrence after radiofrequency ablation (RFA) of liver malignancies on contrast-enhanced computed tomography (CECT). METHODS: Contrast-enhanced computed tomography's 103 patients (59 men and 44 women; mean age, 63 years (range, 31-84 years) with 134 lesions who underwent RFA between 2000 and 2010 were retrospectively analyzed. The primary tumors include colorectal carcinoma (58 patients), hepatocellular carcinoma (n = 13), breast carcinoma (n = 8), neuroendocrine tumor (n = 5), and others (n = 19)...
July 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28721494/a-comprehensive-characterization-of-parameters-affecting-high-frequency-irreversible-electroporation-lesions
#12
Tyler Miklovic, Eduardo L Latouche, Matthew R DeWitt, Rafael V Davalos, Michael B Sano
Several focal therapies are being investigated clinically to treat tumors in which surgery is contraindicated. Many of these ablation techniques, such as radiofrequency ablation and microwave ablation, rely on thermal damage mechanisms which can put critical nerves or vasculature at risk. Irreversible electroporation (IRE) is a minimally invasive, non-thermal technique to destroy tumors. A series of short electric pulses create nanoscale defects in the cell membrane, eventually leading to cell death. Typical IRE protocols deliver a series of 50-100 µs monopolar pulses...
July 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28720474/nitrous-oxide-cryotherapy-for-treatment-of-esophageal-squamous-cell-neoplasia-initial-multicenter-international-experience-with-a-novel-portable-cryoballoon-ablation-system-with-video
#13
Marcia Irene Canto, Julian Abrams, Hannah Kunzli, Bas Weusten, Yoshihiro Komatsu, Blair Jobe, Charles J Lightdale
BACKGROUND AND AIMS: Early esophageal squamous cell neoplasia (ESCN) can be successfully treated by endoscopic mucosal resection (EMR), endoscopic submucosal dissection (ESD), or radiofrequency ablation (RFA). A new portable, battery-powered cryotherapy system using nitrous oxide (cryoballoon focal ablation system (CbFAS) has been used for Barrett's esophagus. It consists of a small hand-held device containing liquid nitrous oxide, which converts to gas within a low-pressure-compliant through-the-scope balloon and freezes targeted mucosa in contact with the balloon...
July 15, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28716699/bridge-to-success-a-better-method-of-cryoablation-for-atrioventricular-nodal-reentrant-tachycardia-in-children
#14
Charitha D Reddy, Scott R Ceresnak, Kara S Motonaga, Kishor Avasarala, Christine Feller, Anthony Trela, Debra Hanisch, Anne M Dubin
BACKGROUND: Cryoablation for AVNRT is associated with higher recurrence rates than radiofrequency ablation(RF). Junctional tachycardia marks procedural success with RF, but no such indicator exists for cryoablation. OBJECTIVE: To determine the impact of voltage mapping plus longer ablation lesions on mid-term success of cryoablation for children with AVNRT. METHODS: A single-center retrospective analysis was performed of pediatric patients with AVNRT who underwent cryoablation from 2011-2015...
July 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28710238/is-fch-pet-able-to-identify-foci-of-infection-superiorly-to-fdg-pet
#15
Liesel Elisabeth Hardy, Hannah Hessamodini, Michael Wallace, Roslyn Francis
We report a case of a brain abscess identified on fluorine-18 choline (FCH) positron emission tomography (PET) scan, which was not identified on fluorodeoxyglucose (FDG) PET scan. To our knowledge, there are no previous case reports of incidental brain abscess identified by FCH PET imaging. A 51-year-old man, with liver cirrhosis complicated by hepatocellular carcinoma (HCC) was enrolled in a research trial comparing HCC detection in FCH PET versus FDG PET. During the course of the trial, he underwent radiofrequency ablation (RFA) for HCC...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28706798/arthroscopic-excision-of-osteoid-osteoma-of-the-elbow
#16
Deepak N Bhatia
Osteoid osteoma has been reported infrequently around the elbow joint, and is usually treated with radiofrequency ablation or open excision. Elbow arthroscopy is useful for excision of accessible lesions, and the accompanying elbow stiffness can be treated concurrently. This report describes an arthroscopic excision of an osteoid osteoma located in the juxta-articular distal humeral bone. An initial adhesiolysis and capsulectomy is performed to gain access to the region above the capitellar articular margin...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28705474/rf-ablation-in-periventricular-heterotopia-related-epilepsy
#17
Massimo Cossu, Laura Mirandola, Laura Tassi
Drug-resistant focal epilepsy is a common occurrence in patients with gray matter nodular heterotopia (NH), and surgical treatment is often considered in these cases. NH-related epileptogenicity is sustained by complex networks, which may involve the nodules and extralesional cortex in various combinations. Therefore, invasive EEG is usually required to identify the structures involved in seizure generation. It has been reported that surgery may be effective in cases with unilateral lesions, whereas bilateral cases are not optimal candidates for surgical success...
July 3, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28702394/osteoid-osteoma-radiofrequency-ablation-treatment-guided-by-computed-tomography-a-case-series
#18
Rosana Raquel Endo, Natalia Fabris Gama, Suely Akiko Nakagawa, Chiang Jeng Tyng, Wu Tu Chung, Fábio Fernando Eloi Pinto
The osteoid osteoma is a benign primary bone tumor that affects mainly males in the second and third decades of life. Radiographic findings show a radiolucent nidus surrounded by reactive sclerotic bone, particularly in the long bones of the lower extremity. Clinically, it presents persistent pain, which is worse at night and improves with salicylates. It can be a self-limiting injury, with an average duration of three years, but because of pain intensity and intolerance to prolonged use of nonsteroidal anti-inflammatories, surgical treatment is an option...
May 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28701858/early-experience-in-starting-a-laparoscopic-liver-resection-program-in-greece
#19
Georgios C Sotiropoulos, Nikolaos Machairas, Ioannis D Kostakis, Paraskevas Stamopoulos, Petros Charalampoudis, Stylianos Kykalos, Gregory Kouraklis, Dimitrios Mantas
BACKGROUND AND OBJECTIVES: Laparoscopic liver resections (LLRs) have gained wider acceptance during the decade as safe and efficient procedures in the management of several benign and malignant diseases when performed by experienced surgeons. We report our initial institutional experience with LLRs performed by 1 certified hepatobiliary surgeon. METHODS: Patients undergoing LLRs by 1 senior hepatobiliary surgeon in our Institution during the period from January 2012 through January 2017 were prospectively sampled and retrospectively analyzed for the purposes of this study...
January 2017: JSLS: Journal of the Society of Laparoendoscopic Surgeons
https://www.readbyqxmd.com/read/28693252/clinical-outcomes-of-percutaneous-radiofrequency-ablation-for-small-renal-cancer
#20
Keiichi Ito, Shigeyoshi Soga, Kenji Seguchi, Yusuke Shinchi, Ayako Masunaga, Shinsuke Tasaki, Kenji Kuroda, Akinori Sato, Junichi Asakuma, Akio Horiguchi, Hiroshi Shinmoto, Tatsumi Kaji, Tomohiko Asano
Partial nephrectomy is the treatment of choice for small renal cell carcinoma (RCC) from the perspective of cancer management and renal function. However, when patients with RCC are of advanced age, exhibit severe comorbidities, including cardiovascular and pulmonary diseases, or have hereditary RCC, ablative therapies, including radiofrequency ablation (RFA) and cryoablation are useful treatment options. In the present study, the clinical outcomes of percutaneous RFA for treating small RCC were evaluated. Between December 2005 and March 2015, 40 patients (41 renal tumors in total) underwent RFA and a total of 50 sessions of RFA were performed...
July 2017: Oncology Letters
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