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radio-frequency ablation

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https://www.readbyqxmd.com/read/29772927/design-and-simulation-of-novel-laparoscopic-renal-denervation-system-a-feasibility-study
#1
Eunbi Ye, Jinhwan Baik, Seunghyun Lee, Seon Young Ryu, Sunchoel Yang, Eue-Keun Choi, Won Hoon Song, Hyeong Dong Yuk, Chang Wook Jeong, Sung-Min Park
PURPOSE: In this study, we propose a novel laparoscopy-based renal denervation (RDN) system for treating patients with resistant hypertension. In this feasibility study, we investigated whether our proposed surgical instrument can ablate renal nerves from outside of the renal artery safely and effectively and can overcome the depth-related limitations of the previous catheter-based system with less damage to the arterial walls. METHOD: We designed a looped bipolar electrosurgical instrument to be used with laparoscopy-based RDN system...
May 18, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29696193/a-prospective-development-study-of-software-guided-radio-frequency-ablation-of-primary-and-secondary-liver-tumors-clinical-intervention-modelling-planning-and-proof-for-ablation-cancer-treatment-clinicimppact
#2
Martin Reinhardt, Philipp Brandmaier, Daniel Seider, Marina Kolesnik, Sjoerd Jenniskens, Roberto Blanco Sequeiros, Martin Eibisberger, Philip Voglreiter, Ronan Flanagan, Panchatcharam Mariappan, Harald Busse, Michael Moche
Introduction: Radio-frequency ablation (RFA) is a promising minimal-invasive treatment option for early liver cancer, however monitoring or predicting the size of the resulting tissue necrosis during the RFA-procedure is a challenging task, potentially resulting in a significant rate of under- or over treatments. Currently there is no reliable lesion size prediction method commercially available. Objectives: ClinicIMPPACT is designed as multicenter-, prospective-, non-randomized clinical trial to evaluate the accuracy and efficiency of innovative planning and simulation software...
December 2017: Contemporary Clinical Trials Communications
https://www.readbyqxmd.com/read/29684251/image-guided-chemical-and-thermal-ablations-for-thyroid-disease-review-of-efficacy-and-complications
#3
REVIEW
Iain J Nixon, Peter Angelos, Ashok R Shaha, Alessandra Rinaldo, Michelle D Williams, Alfio Ferlito
Image-guided ablation of thyroid disease is increasingly being commonly reported. Techniques including ethanol injection and thermal ablation using radio-frequency, laser, and microwave devices have been described. Minimally invasive approaches to the management of benign cystic, solid, and functional thyroid nodules as well as both primary and recurrent thyroid malignancy have been reported. The purpose of this article is to review the current evidence relating to image-guided ablation of thyroid disease with a focus on clinical outcomes and complication rates for patients treated with this minimally invasive approach...
April 23, 2018: Head & Neck
https://www.readbyqxmd.com/read/29663460/treatment-of-atrophic-acne-scarring-with-fractional-micro-plasma-radio-frequency-in-chinese-patients-a-prospective-study
#4
Ting Lan, Yan Xiao, Li Tang, Michael R Hamblin, Rui Yin
BACKGROUND: Acne scarring is a common disfiguring sequela of acne vulgaris which can lead to serious psychosocial problems and have a negative effect on patients' quality of life. Although a variety of approaches can be used to treat atrophic acne scars, disadvantages such as long-healing time, dyspigmentation, infections, and prolonged erythema make these treatments unsatisfactory especially for Asians. Fractional micro-plasma radio-frequency is a novel technology that produces minor ablation to the epidermis to promote rapid re-epithelialization, while the radio-frequency evoked thermal effect can stimulate regeneration and remodeling of dermal fibroblasts...
April 16, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29652390/integrated-catheter-for-simultaneous-radio-frequency-ablation-and-optoacoustic-monitoring-of-lesion-progression
#5
Johannes Rebling, Francisco Javier Oyaga Landa, Xosé Luís Deán-Ben, Alexandre Douplik, Daniel Razansky
Radio frequency (RF) catheter ablation is commonly used to eliminate dysfunctional cardiac tissue by heating via an alternating current. Clinical outcomes are highly dependent on careful anatomical guidance, electrophysiological mapping, and careful RF power titration during the procedure. Yet, current treatments rely mainly on the expertise of the surgeon to assess lesion formation, causing large variabilities in the success rate. We present an integrated catheter design suitable for simultaneous RF ablation and real-time optoacoustic monitoring of the forming lesion...
April 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29619610/ultrasound-thermal-monitoring-with-an-external-ultrasound-source-for-customized-bipolar-rf-ablation-shapes
#6
Younsu Kim, Chloé Audigier, Jens Ziegle, Michael Friebe, Emad M Boctor
PURPOSE: Thermotherapy is a clinical procedure which delivers thermal energy to a target, and it has been applied for various medical treatments. Temperature monitoring during thermotherapy is important to achieve precise and reproducible results. Medical ultrasound can be used for thermal monitoring and is an attractive medical imaging modality due to its advantages including non-ionizing radiation, cost-effectiveness and portability. We propose an ultrasound thermal monitoring method using a speed-of-sound tomographic approach coupled with a biophysical heat diffusion model...
April 4, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29506339/new-techniques-for-wound-management-a-systematic-review-of-their-role-in-the-management-of-chronic-wounds
#7
REVIEW
Farid Bekara, Julian Vitse, Sergiu Fluieraru, Raphael Masson, Antoine De Runz, Vera Georgescu, Guillaume Bressy, Jean Louis Labbé, Benoit Chaput, Christian Herlin
Debridement is a crucial component of wound management. Recent technologies such as hydrosurgery (Versajet), ultrasound therapy (the MIST therapy device), or plasma-mediated bipolar radio-frequency ablation therapy (Coblation) seem to represent interesting alternatives for wound debridement. The purpose of this systematic review was to describe, evaluate, and compare these three recently developed methods for the management of chronic wounds. In January 2016, an electronic database search was conducted of MEDLINE, PubMed Central, and Embase for articles concerning these three innovative methods for the management of chronic wounds...
March 2018: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/29491653/standard-guidelines-of-care-performing-procedures-in-patients-on-or-recently-administered-with-isotretinoin
#8
Venkataram Mysore, Omprakash H Mahadevappa, Shyamanta Barua, Imran Majid, Vishalakshi Viswanath, Ramesh M Bhat, Suresh Talwar, Salim Thurakkal, Sanjeev J Aurangabadkar, Manas Chatterjee, Anil Ganjoo
Background: Currently, the standard protocol regarding the performance of procedures on patients receiving or having recently received isotretinoin (13- cis -retinoic acid) states that the procedures should not be performed. The recommendations in standard books and drug insert require discontinuation of isotretinoin for 6 months before performing cosmetic procedures, including waxing, dermabrasion, chemical peels, laser procedures, or incisional and excisional cold-steel surgery. These recommendations have been followed for over two decades despite little evidence for the stated increased risk of scarring...
October 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/29372343/radio-frequency-ablation-and-pulsed-radiofrequency-for-treating-peripheral-neuralgias
#9
REVIEW
Alaa Abd-Elsayed, Antonioius Anis, Alan David Kaye
PURPOSE OF REVIEW: Peripheral nerve pain is common among patients with typical management including the use of pain medications, neuropathic agents, steroid injections, and nerve blocks. Additionally, the use of pulsed radiofrequency (PRF) and radiofrequency ablation (RFA) can be used in the management of chronic peripheral nerve pain. Previous studies investigating the effectiveness of RFA and PRF, typically case reports, have demonstrated that peripheral nerve RFA and PRF have the potential to provide relief of chronic pain for long duration...
January 25, 2018: Current Pain and Headache Reports
https://www.readbyqxmd.com/read/29343999/targeted-treatment-with-radio-frequency-ablation-for-lingual-tonsil
#10
Suvi Renkonen, Antti A Mäkitie, Leif Bäck
Objectives: Benign enlargement of the lingual tonsils due to various causes may cause symptoms that warrant treatment. Conventional lingual tonsillectomy remains a challenging procedure, and there is no established standard procedure. We aimed to review the patients receiving different methods of lingual tonsil surgery for various indications at our institute. Methods: Retrospective clinical data on all patients with an ablative operation of the tongue base during the 8-year period between 2007 and 2014 at the Helsinki University Hospital, Helsinki, Finland, were reviewed...
2018: Clinical Medicine Insights. Ear, Nose and Throat
https://www.readbyqxmd.com/read/29283343/cardiac-lesion-mapping-in-vivo-using-intracardiac-myocardial-elastography
#11
Ethan Bunting, Clement Papadacci, Elaine Wan, Vincent Sayseng, Julien Grondin, Elisa E Konofagou
Radio frequency (RF) ablation of the myocardium is used to treat various cardiac arrhythmias. The size, spacing, and transmurality of lesions have been shown to affect the success of the ablation procedure; however, there is currently no method to directly image the size and formation of ablation lesions in real time. Intracardiac myocardial elastography (ME) has been previously used to image the decrease in cardiac strain during systole in the ablated region as a result of the lesion formation. However, the feasibility of imaging multiple lesions and identifying the presence of gaps between lesions has not yet been investigated...
January 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29168402/liquid-metal-bath-as-conformable-soft-electrodes-for-target-tissue-ablation-in-radio-frequency-ablation-therapy
#12
Xuyang Sun, Zhi-Zhu He, Zhong-Shan Deng, Yi-Xin Zhou, Jing Liu
BACKGROUND: Radio-frequency ablation has been an important physical method for tumor hyperthermia therapy. The conventional rigid electrode boards are often uncomfortable and inconvenient for performing surgery on irregular tumors, especially for those tumors near the joints, such as ankles, knee-joints or other facets like finger joints. MATERIAL AND METHODS: We proposed and demonstrated a highly conformable tumor ablation strategy through introducing liquid metal bath as conformable soft electrodes...
November 23, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29128759/a-conduction-velocity-adapted-eikonal-model-for-electrophysiology-problems-with-re-excitability-evaluation
#13
Cesare Corrado, Nejib Zemzemi
Computational models of heart electrophysiology achieved a considerable interest in the medical community as they represent a novel framework for the study of the mechanisms underpinning heart pathologies. The high demand of computational resources and the long computational time required to evaluate the model solution hamper the use of detailed computational models in clinical applications. In this paper, we present a multi-front eikonal algorithm that adapts the conduction velocity (CV) to the activation frequency of the tissue substrate...
January 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29107175/entrapment-of-focal-atrial-tachycardia-using-cryoballoon-ablation-sinus-rhythm-in-the-left-atrium-and-ongoing-atrial-tachycardia-in-the-left-atrial-appendage
#14
Hikmet Yorgun, Uğur Canpolat, Banu Evranos, Kudret Aytemir
Left atrial appendage (LAA) is a well-known source of focal atrial tachycardias (AT). Although radio-frequency (RF) energy is the most commonly used technique in such cases, there was an option other than epicardial approach when RF technique fails. Cryoballoon technology is primarily developed to be used for pulmonary vein isolation (PVI). Also, there was no report regarding the isolation of LAA by using cryo-balloon in patients with focal AT. In this case, for the first time in the literature, we successfully isolated the LAA because of failed attempts of RF ablation for focal AT in whom the surface electrogram showed a sinus rhythm while arrhythmia continues inside the LAA...
November 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/28982836/randomised-clinical-trial-of-cryoballoon-versus-irrigated-radio-frequency-catheter-ablation-for-atrial-fibrillation-the-effect-of-double-short-versus-standard-exposure-cryoablation-duration-during-pulmonary-vein-isolation-circa-dose-methods-and-rationale
#15
Jason G Andrade, Marc W Deyell, Mariano Badra, Jean Champagne, Marc Dubuc, Peter Leong-Sit, Laurent Macle, Paul Novak, Jean-Francois Roux, John Sapp, Anthony Tang, Atul Verma, George A Wells, Paul Khairy
INTRODUCTION: Pulmonary vein isolation (PVI) is an effective therapy for paroxysmal atrial fibrillation (AF), but it has limitations. The two most significant recent advances have centred on the integration of real-time quantitative assessment of catheter contact force into focal radio frequency (RF) ablation catheters and the development of dedicated ablation tools capable of achieving PVI with a single ablation lesion (Arctic Front cryoballoon, Medtronic, Minneapolis, MN, USA). Although each of these holds promise for improving the clinical success of catheter ablation of AF, there has not been a rigorous comparison of these advanced ablation technologies...
October 5, 2017: BMJ Open
https://www.readbyqxmd.com/read/28976307/three-dimensional-noninvasive-imaging-of-ventricular-arrhythmias-in-patients-with-premature-ventricular-contractions
#16
Long Yu, Qi Jin, Zhaoye Zhou, Liqun Wu, Bin He
OBJECTIVE: Noninvasive imaging of cardiac electrical activity promises to provide important information regarding the underlying arrhythmic substrates for successful ablation intervention and further understanding of the mechanism of such lethal disease. The aim of this study is to evaluate the performance of a novel three-dimensional (3D) cardiac activation imaging technique to noninvasively localize and image origins of focal ventricular arrhythmias in patients undergoing radio frequency ablation...
October 2, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28966928/techniques-for-epicardial-mapping-and-ablation-with-a-miniature-robotic-walker
#17
Dwight A Meglan, Wener Lv, Richard J Cohen, Cameron N Riviere
BACKGROUND: Present treatments for ventricular tachycardia have significant drawbacks. To ameliorate these drawbacks, it may be advantageous to employ an epicardial robotic walker that performs mapping and ablation with precise control of needle insertion depth. This paper examines the feasibility of such a system. METHODS: This paper describes techniques for epicardial mapping and depth-controlled ablation with the robotic walker. The mapping technique developed for the current form of the system uses a single equivalent moving dipole model combined with the navigation capability of the walker...
2017: Robotic Surgery: Research and Reviews
https://www.readbyqxmd.com/read/28888800/percutaneous-lung-ablation-of-pulmonary-recurrence-may-improve-survival-in-selected-patients-undergoing-cytoreductive-surgery-for-colorectal-cancer-with-peritoneal-carcinomatosis
#18
T A Bin Traiki, O M Fisher, S J Valle, R N Parikh, M A Kozman, D Glenn, M Power, W Liauw, N A Alzahrani, D L Morris
PURPOSE: To analyze the outcomes of patients developing pulmonary metastases (PM) following cytoreductive surgery (CRS) and perioperative intra-peritoneal chemotherapy (IPC) for colorectal cancer (CRC) with peritoneal carcinomatosis. PATIENTS AND METHODS: A retrospective analysis of patients undergoing CRS/IPC for CRC from 1996 to 2016 was performed. Lung-specific disease-free and patient overall survival was analyzed. Patients undergoing percutaneous lung ablative therapy (PLAT) for PM were compared to patients receiving systemic chemotherapy alone...
October 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28809739/waiting-time-and-quality-of-care-deserved-to-patients-with-early-stage-hepatocellular-carcinoma-undergoing-rfa-treatment
#19
COMMENT
Maurizio Soresi, Anna Licata, Lydia Giannitrapani, Giuseppe Montalto
No abstract text is available yet for this article.
September 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28809734/wait-time-for-curative-intent-radio-frequency-ablation-is-associated-with-increased-mortality-in-patients-with-early-stage-hepatocellular-carcinoma
#20
Mayur Brahmania, Osman Ahmed, Melissa Kelley, David Wong, Matthew Kowgier, Korosh Khalili, Rob Beecroft, Eberhard L Renner, Hemant Shah, Jordan Feld, Harry L A Janssen, Morris Sherman
INTRODUCTION: Radiofrequency ablation (RFA) is a recommended curative intent treatment option for patients with early stage hepatocellular carcinoma (HCC). We investigated if wait times for RFA were associated with residual tumor, tumor recurrence, need for liver transplantation, or death. MATERIAL AND METHODS: We conducted a retrospective study of patients diagnosed with HCC between January 2010 and December 2013 presenting to University Health Network (UHN) in Toronto, Canada...
September 2017: Annals of Hepatology
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