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Radiofrequency lesioning

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https://www.readbyqxmd.com/read/28230011/changes-of-cd4-t-cell-subsets-after-radiofrequency-ablation-in-lung-cancer-and-its-significance
#1
Wang Shaobin, Xiong Yu, Lin Jiatian, Chen Zaizhong, Dai Luping, Chen Junhui
AIMS: To analyze the changes of CD4+ T-cell subsets following radiofrequency ablation (RFA) in lung cancer and the impact of RFA on the antitumor immunity. SUBJECTS AND METHODS: Flow cytometry was employed to detect CD4+ T-cell subsets in the peripheral blood from 45 healthy controls and 45 lung cancer patients before and after RFA. The correlation between CD4+ T-cell subsets and the clinical characteristics was discussed by comparing the results between different groups...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28230009/effect-of-heat-sink-on-the-recurrence-of-small-malignant-hepatic-tumors-after-radiofrequency-ablation
#2
Zheng-Yu Lin, Guo-Lin Li, Jin Chen, Zhong-Wu Chen, Yi-Ping Chen, Sun-Zhi Lin
AIMS: The aim of this study was to investigate the effect of heat sink on the recurrence of hepatic malignant tumors <3 cm after percutaneous radiofrequency ablation (RFA). SUBJECTS AND METHODS: This study included 564 hepatic malignant tumors <3 cm in 381 patients. Preoperative images were used to determine whether these tumors were adjacent to vessels, and the diameter of adjacent vessels was measured. RFA was performed computed tomography (CT), magnetic resonance imaging (MRI) and ultrasound (US) guidance, and postoperative imaging follow-up was then conducted...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28230007/laparoscopic-combined-with-percutaneous-ablation-for-hepatocellular-carcinoma-under-liver-capsule-a-single-chinese-center-experience-of-thirty-patients
#3
Zhe Tang, Yi Zhu, Kezhong Tang, Linping Dong, Bin Yang, Heqin Fang, Yulian Wu, Bo Zhang
AIM OF STUDY: For the tumor lesions close to capsule of the liver, traditional percutaneous radiofrequency ablation (PRFA) is limited due to high incidence of postoperative complications. The aim of the present study is to whether laparoscopic combined with PRFA (LCPR) could effectively ablate the tumor lesions close to capsule of the liver. METHODS: A total of 119 patients with subcapsular hepatocellular carcinoma (HCC) were divided into two groups: PRFA group (89 patients) and LCPR group (30 patients)...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28226542/towards-patient-specific-modelling-of-lesion-formation-during-radiofrequency-catheter-ablation-for-atrial-fibrillation
#4
Navjeevan Soor, Ross Morgan, Marta Varela, Oleg V Aslanidi, Navjeevan Soor, Ross Morgan, Marta Varela, Oleg V Aslanidi, Marta Varela, Navjeevan Soor, Ross Morgan, Oleg V Aslanidi
Radiofrequency catheter ablation procedures are a first-line method of clinical treatment for atrial fibrillation. However, they suffer from suboptimal success rates and are also prone to potentially serious adverse effects. These limitations can be at least partially attributed to the inter- and intra-patient variations in atrial wall thickness, and could be mitigated by patient-specific approaches to the procedure. In this study, a modelling approach to optimising ablation procedures in subject-specific 3D atrial geometries was applied...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28217225/immediate-discontinuation-of-ablation-during-pulmonary-vein-isolation-remarkably-decreases-the-incidence-of-esophageal-thermal-lesions-even-when-using-steerable-sheaths
#5
Norikazu Watanabe, Yuta Chiba, Yoshimi Onishi, Shiro Kawasaki, Yumi Munetsugu, Yoshimasa Onuma, Hiroyuki Itou, Tatsuya Onuki, Yoshino Minoura, Taro Adachi, Mitsuharu Kawamura, Taku Asano, Kaoru Tanno, Yutarou Kubota, Kazuo Konishi, Youichi Kobayashi
BACKGROUND: Left atrial-esophageal fistulas (LAEFs) are serious complications with high mortality after atrial fibrillation radiofrequency ablation (AFRA). Decreasing the incidence of esophageal thermal lesions (EsoTLs) that may lead to LAEFs is important. The aim of this study was to suppress EsoTL development and determine the appropriate alarm setting for a temperature-monitoring probe by using steerable sheath (STS) methods. METHODS: We enrolled 82 consecutive patients (mean, 61...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217048/radiofrequency-ablation-of-hepatocellular-carcinomas-a-new-spectrum-of-anesthetic-experience-at-a-tertiary-care-hospital-in-pakistan
#6
Faisal Shamim, Ali Asghar, Saman Tauheed, Muhammad Yahya
BACKGROUND: Radiofrequency ablation (RFA) is a minimally invasive technique of tumor destruction for patients with hepatic cancer who are not candidates for conventional therapy. The therapy required general anesthesia (GA) or sedation to ensure patient safety and comfort. The study is aimed to report and evaluate factors that influenced the periprocedural anesthetic management, drugs used, and complications during and immediately after RFA procedure for hepatocellular carcinoma. METHODS: For this retrospective study, we included 46 patients who underwent percutaneous RFA under GA or conscious sedation from January 2010 to June 2013 in Aga Khan University Hospital, Pakistan...
January 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28210742/clinics-in-diagnostic-imaging-174-l5-vertebral-superior-facet-osteoblastoma-ob
#7
Manickam Subramanian, Hong Chou, Kabilan Chokkappan, Wilfred Cg Peh
A 25-year-old man presented with chronic low back pain and occasional radiation to the right lower limb. Magnetic resonance imaging and computed tomography (CT) of the lumbar spine showed an osteolytic expansile lesion with a central sclerotic nidus in the right superior facet of the L5 vertebra and surrounding marrow oedema. The diagnosis of osteoblastoma was made based on imaging findings and confirmed after CT-guided biopsy. Radiofrequency ablation of the lesion was successfully performed. The patient tolerated the procedure well and showed symptomatic relief...
February 2017: Singapore Medical Journal
https://www.readbyqxmd.com/read/28209581/postoperative-mri-evaluation-of-a-radiofrequency-cordotomy-lesion-for-intractable-cancer-pain
#8
A Vedantam, P Hou, T L Chi, K R Hess, P M Dougherty, E Bruera, A Viswanathan
BACKGROUND AND PURPOSE: There are limited data on the use of postoperative imaging to evaluate the cordotomy lesion. We aimed to describe the cordotomy lesion by using postoperative MR imaging in patients after percutaneous cordotomy for intractable cancer pain. MATERIALS AND METHODS: Postoperative MR imaging and clinical outcomes were prospectively obtained for 10 patients after percutaneous cordotomy for intractable cancer pain. Area, signal intensity, and location of the lesion were recorded...
February 16, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28196771/liver-metastases-from-breast-cancer-what-role-for-surgery-indications-and-results
#9
REVIEW
Nicolas Golse, René Adam
Liver metastases from breast cancer (LMBC) have long been considered as a systemic disease because of the hematological route of dissemination, requiring noncurative management. In fact, despite recent advances in drug therapies personalized to tumor phenotype, the chances of a cure are nil and there is little hope of long-term survivors after nonsurgical management alone. By contrast, there is a growing evidence in the literature for satisfactory long-term results after a combination of chemotherapy and liver resection, with 5-year survival reaching >40% in some series...
January 9, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28194514/a-prospective-comparison-between-auto-registration-and-manual-registration-of-real-time-ultrasound-with-mr-images-for-percutaneous-ablation-or-biopsy-of-hepatic-lesions
#10
Dong Ik Cha, Min Woo Lee, Kyoung Doo Song, Young-Taek Oh, Ja-Yeon Jeong, Jung-Woo Chang, Jiwon Ryu, Kyong Joon Lee, Jaeil Kim, Won-Chul Bang, Dong Kuk Shin, Sung Jin Choi, Dalkwon Koh, Bong Koo Seo, Kyunga Kim
PURPOSE: To compare the accuracy and required time for image fusion of real-time ultrasound (US) with pre-procedural magnetic resonance (MR) images between positioning auto-registration and manual registration for percutaneous radiofrequency ablation or biopsy of hepatic lesions. METHODS: This prospective study was approved by the institutional review board, and all patients gave written informed consent. Twenty-two patients (male/female, n = 18/n = 4; age, 61...
February 13, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28191713/tissue-characterization-and-phenotype-classification-in-patients-presenting-with-acute-myocardial-infarction-insights-from-the-iwonder-study
#11
Cristiano F Souza, Akiko Maehara, Gary S Mintz, Mitsuaki Matsumura, Claudia M R Alves, Antonio Carlos Carvalho, Adriano Caixeta
OBJECTIVES: We sought to assess a new modality of radiofrequency intravascular ultrasound (IVUS) called iMAP-IVUS (Boston Scientific, Santa Clara, California) during the evaluation of patients presenting with high-risk acute coronary syndromes. BACKGROUND: There are limited data on plaque tissue characterization and phenotype classification using iMAP-IVUS. METHODS: In the iWonder study patients presenting with ST-elevation myocardial infarction (STEMI) or non-STEMI underwent three-vessel grayscale IVUS and iMAP-IVUS tissue characterization prior to percutaneous intervention...
February 13, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28185360/effect-of-environmental-impedance-surrounding-a-radiofrequency-ablation-catheter-electrode-on-lesion-characteristics
#12
Duy T Nguyen, Kianna Nguyen, Lijun Zheng, Joseph Schuller, Matthew Zipse, Wendy S Tzou, William H Sauer
INTRODUCTION: The electrical conductivity of the environment surrounding a catheter electrode may affect radiofrequency (RF) current. A higher impedance environment enveloping a catheter tip can be insulating and thus direct RF preferentially into targeted cardiac tissue. We sought to evaluate whether different environmental impedances will affect RF lesions. METHODS: An ex vivo model using bovine myocardium, load cell, and 4 mm ablation catheter was tested using a circulating bath of normal (0...
February 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28184002/renal-cell-carcinoma-metastasis-involving-vertebral-hemangioma-dual-percutaneous-treatment-by-navigational-bipolar-radiofrequency-ablation-and-high-viscosity-cement-vertebroplasty
#13
Jean-Baptiste Zerlauth, Reto Meuli, Vincent Dunet
The case of a 70-year-old woman with progressive renal cell carcinoma (RCC) metastatic invasion of a L3 vertebral hemangioma treated by dual percutaneous radiofrequency ablation (RFA) and vertebroplasty is reported. The patient was surgically treated for RCC in 2001. Chemotherapy and immunotherapy were introduced in 2013 for ovarian, bladder and cerebral metastatic disease. An asymptomatic L3 benign hemangioma was noticed at this time. One-year CT and MRI follow-up studies demonstrated a nodular isolated soft tissue lesion involving the anterior edge of the hemangioma...
February 9, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28183835/benign-spine-lesions-advances-in-techniques-for-minimally-invasive-percutaneous-treatment
#14
REVIEW
A Tomasian, A N Wallace, J W Jennings
Minimally invasive percutaneous imaging-guided techniques have been shown to be safe and effective for the treatment of benign tumors of the spine. Techniques available include a variety of tumor ablation technologies, including radiofrequency ablation, cryoablation, microwave ablation, alcohol ablation, and laser photocoagulation. Vertebral augmentation may be performed after ablation as part of the same procedure for fracture stabilization or prevention. Typically, the treatment goal in benign spine lesions is definitive cure...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28181822/oncogenic-osteomalacia-role-of-ga-68-dotanoc-pet-ct-scan-in-identifying-the-culprit-lesion-and-its-management
#15
Deepa Singh, Mudalsha Ravina, Narvesh Kumar, Veeresh Dube, Utham Kumar K, Manish Dixit, Sanjay Gambhir
OBJECTIVES: The aim of this study was to evaluate role of (68)Ga-DOTANOC PET/CT scan in localization of culprit lesion for biopsy and required intervention (surgical excision/radiofrequency ablation) in patients with long standing oncogenic osteomalacia (OOM)/tumor induced osteomalacia (TIO). METHODS: 17 patients (08 male & 09 female) underwent (68)Ga-DOTANOC PET/CT scan. The patients referred with clinical and biochemical evidence of hypophosphatemia and raised Fibroblast Growth Factor-23 (FGF-23)...
February 9, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28174170/does-additional-electrogram-guided-ablation-after-linear-ablation-reduce-recurrence-after-catheter-ablation-for-longstanding-persistent-atrial-fibrillation-a-prospective-randomized-study
#16
Tae-Hoon Kim, Jae-Sun Uhm, Jong-Youn Kim, Boyoung Joung, Moon-Hyoung Lee, Hui-Nam Pak
BACKGROUND: Although circumferential pulmonary vein isolation (CPVI) catheter ablation may not be sufficient for long-standing persistent atrial fibrillation (L-PeAF), it is not clear which ablation strategy is beneficial in addition to CPVI. We sought to investigate whether additional complex fractionated atrial electrogram (CFAE)-guided ablation improves clinical outcomes in L-PeAF patients who exhibit continuous atrial fibrillation (AF) after CPVI and linear ablation (Line). METHODS AND RESULTS: This study enrolled 137 L-PeAF patients (71...
February 7, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28163454/comparative-study-to-evaluate-the-efficacy-of-radiofrequency-ablation-versus-trichloroacetic-acid-in-the-treatment-of-xanthelasma-palpebrarum
#17
Praveen Kumar Shanmugam Reddy, Sumathy Tharayil Kunneth, Shyam Prasad Arakali Lakshminarayana, Suparna Madivalara Yallappa, Ranganathan Chandrashekara, Shivaswamy Kanakapura Nanjundaswamy
BACKGROUND: Xanthelasma palpebrarum (XP) is a metabolic disorder involving the eyelids. Radiofrequency(RF) surgery and trichloroacetic acid (TCA) applications have been listed among the procedures for XP, but comparative studies are not available. AIM: To compare the efficacy of radiofrequency surgery versus trichloroacetic acid application in the treatment of XP. SETTINGS AND DESIGN: 20 consecutive cases of XP attending dermatology, medicine and endocrinology out-patient departments of M...
October 2016: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28160105/endoscopic-radiofrequency-ablation-of-the-pancreas
#18
REVIEW
Tarun Rustagi, Ankit Chhoda
Radiofrequency ablation (RFA) is a well-established technique to ablate dysplastic and neoplastic tissue via local thermal coagulative necrosis. Despite the widespread use in management of several cancers, the application of RFA in pancreas has been limited due to the increased risks of complications from the increased sensitivity of pancreatic tissue to thermal injury and proximity to vascular and biliary structures. RFA has been successfully used during laparotomy for locally advanced pancreatic carcinoma but requires an invasive approach...
February 3, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28158168/ultrasound-guided-radiofrequency-lesioning-of-the-articular-branches-of-the-femoral-nerve-for-the-treatment-of-chronic-post-arthroplasty-hip-pain
#19
David J Kim, Shiqian Shen, George M Hanna
BACKGROUND: Total hip arthroplasty (THA) is a common surgical treatment for several conditions of the hip. While the majority of patients obtain satisfactory results, many develop chronic post-arthroplasty hip pain that can be difficult to treat. OBJECTIVE: We evaluate the effectiveness of cooled (60°C) radiofrequency lesioning of the articular branches of the femoral nerve (ABFN) as a minimally invasive treatment for patients suffering from chronic post-arthroplasty hip pain...
February 2017: Pain Physician
https://www.readbyqxmd.com/read/28155684/the-comparison-of-lesion-outline-and-temperature-field-determined-by-different-ways-in-atrial-radiofrequency-ablation
#20
Zhen Tian, Qun Nan, Xiaohui Nie, Tong Dong, Ruirui Wang
BACKGROUND: The aim of this study is to research the lesion outline and temperature field in different ways in atrial radiofrequency ablation by using finite element method. METHODS: This study used the method which considered the thermal dosage to determine the boundary between viable and dead tissue, and compared to the 50 °C isotherm results in analyzing lesion outline. Besides, we used Hyperbolic equation which considered the relaxation time to calculate the temperature field and contrasted it with Pennes' bioheat transfer equation...
December 28, 2016: Biomedical Engineering Online
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