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https://www.readbyqxmd.com/read/28227677/multipoint-temperature-monitoring-in-liver-undergoing-computed-tomography-guided-radiofrequency-ablation-with-fiber-bragg-grating-probes
#1
P Saccomandi, E Schena, M Diana, F M Di Matteo, G Costamagna, J Marescaux, P Saccomandi, E Schena, M Diana, F M Di Matteo, G Costamagna, J Marescaux, F M Di Matteo, J Marescaux, E Schena, M Diana, G Costamagna, P Saccomandi
In this work, we investigated the temperature increment experienced by biological tissue during radiofrequency ablation (RFA). The measurements were performed by using two custom-made thermal probes based on fiber optic sensors (fiber Bragg gratings, FBGs). The two probes embed a total of 9 FBGs. Experiments were performed during RFA of an ex vivo healthy porcine liver. The RFA heating module was equipped with 5 thermocouples. Results show that the temperature increment close to the applicator (i.e., 0.6 cm-0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226508/temperature-monitoring-during-radiofrequency-ablation-of-liver-in-vivo-trials
#2
P Saccomandi, G Frauenfelder, C Massaroni, M A Caponera, A Polimadei, F Taffoni, F M Di Matteo, G Costamagna, F Giurazza, E Schena, P Saccomandi, G Frauenfelder, C Massaroni, M A Caponera, A Polimadei, F Taffoni, F M Di Matteo, G Costamagna, F Giurazza, E Schena, F Taffoni, F M Di Matteo, F Giurazza, E Schena, G Costamagna, A Polimadei, G Frauenfelder, P Saccomandi, C Massaroni
Radiofrequency ablation (RFA) is a minimally invasive procedure used to treat tumors by means of hyperthermia, mostly through percutaneous approach. The tissue temperature plays a pivotal role in the achievement of the target volume heating, while sparing the surrounding healthy tissue from thermal damage. Several techniques for thermometry during RFA are investigated, most of them based on the use of single-point measurement system (e.g., thermocouples). The measurement of temperature map is crucial for the real-time control and fine adjustment of the treatment settings, to optimize the shape and size of the ablated volume...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226000/efficacy-and-safety-of-a-single-radiofrequency-ablation-of-solid-benign-non-functioning-thyroid-nodules
#3
Roberto Cesareo, Andrea Palermo, Valerio Pasqualini, Carla Simeoni, Alessandro Casini, Giuseppe Pelle, Silvia Manfrini, Giuseppe Campagna, Roberto Cianni
Objective: The objective of our study is to evaluate the clinical outcomes and safety of radiofrequency thermal ablation (RFA) for benign thyroid nodules (BTNs) over a 1-year follow-up. Subjects and methods: This is a monocentric retrospective study. Forty-eight patients with solid, non-functioning BTNs were treated by RFA using a 17G internally cooled electrode. We categorized thyroid nodules as small (≤ 12 mL), medium (12 to 30 mL), or large (over 30 mL). BTNs volume reduction, thyroid function, cosmetic and compressive score changes and side effect evaluation at 6 and 12 months were evaluated...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28223839/ultrasound-guided-alcohol-neurolysis-and-radiofrequency-ablation-of-painful-stump-neuroma-effective-treatments-for-post-amputation-pain
#4
Xin Zhang, Yongming Xu, Jin Zhou, Shaofeng Pu, Yingying Lv, Yueping Chen, Dongping Du
BACKGROUND: Post-amputation pain (PAP) is highly prevalent after limb amputation, and stump neuromas play a key role in the generation of the pain. Presently, PAP refractory to medical management is frequently treated with minimally invasive procedures guided by ultrasound, such as alcohol neurolysis and radiofrequency ablation (RFA). OBJECTIVE: To record the immediate and long-term efficacy of alcohol neurolysis and RFA. We first used alcohol neurolysis and then, when necessary, we performed RFA on PAP patients...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28218866/improvement-in-the-initial-isq-through-use-of-a-modified-surgical-technique
#5
Rosa-Maria Diaz-Sanchez, Jose-Maria Delgado-Muñoz, Pilar Hita-Iglesias, Kyle T Pullen, Maria-Angeles Serrera-Figallo, Daniel Torres-Lagares
To ensure that similar primary implant stability measured by resonance frequency analysis (RFA) could be obtained in different jawbone densities by using a specific surgical drilling protocol and, to correlate those RFA measurements with factors related to the implant design, width and length, we are performed a one-year prospective clinical study was carried out using 27 subjects. A total of 67 hydrophilic titanium implants were placed using a standard two-stage implant placement protocol. The bone type at each implant site was determined by evaluation of a preoperative, high-resolution cone beam computed tomography (CBCT) scan...
February 20, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28217989/comparison-of-endovenous-radiofrequency-ablation-laser-ablation-foam-sclerotherapy-and-surgical-stripping-for-great-saphenous-varicose-veins-extended-5-year-follow-up-of-a-rct
#6
Martin Lawaetz, Julie Serup, Birgit Lawaetz, Lars Bjoern, Allan Blemings, Bo Eklof, Lars Rasmussen
BACKGROUND: This study compares the outcome 5 years after treatment of varicose veins with endovenous radiofrequency ablation (RFA), endovenous laser ablation (EVLA), ultrasound guided foam sclerotherapy (UGFS) or high ligation and stripping (HL/S) by assessing technical efficacy, clinical recurrence and the rate of reoperations. METHODS: Five hundred patients (580 legs) with Great Saphenous Vein (GSV) reflux and varicose veins were randomized to one of the 4 treatments...
February 17, 2017: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/28217048/radiofrequency-ablation-of-hepatocellular-carcinomas-a-new-spectrum-of-anesthetic-experience-at-a-tertiary-care-hospital-in-pakistan
#7
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/28216849/assessment-of-implant-stability-during-various-stages-of-healing-placed-immediately-following-extraction-in-an-overdenture-situation
#8
Ashwin Thomas Koshy, T Aby Mathew, Nicholas Mathew, Angel Mary Joseph
To assess the implant stability during different stages of healing in an immediate loaded implant soon after extraction. A 73-year-old female came with a chief complaint of bad smell and irritation in her lower front gum region. On examination, she was found to be completely edentulous in the maxillary arch and partially edentulous in the mandibular arch with only the canines present bilaterally. The posterior mandibular ridge was severely resorbed and hence could not be treated with a conventional mandibular complete denture...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28215670/therapeutic-efficacy-of-combined-pegylated-liposomal-doxorubicin-and-radiofrequency-ablation-comparing-single-and-combined-therapy-in-young-and-old-mice
#9
Alexander V Andriyanov, Emma Portnoy, Erez Koren, Sara Eyal, S Nahum Goldberg, Yechezkel Barenholz
Antitumor therapy in the elderly is particularly challenging due to multiple, often chronic diseases, poly-therapy, and age-related physiological changes that affect drug efficacy and safety. Furthermore, tumors may become more aggressive and drug-resistant with advanced age, leading to poor patient prognosis. In this study, we evaluated in mice bearing medulloblastoma xenografts the effect of age on tumor progression and tumor therapy. We focused on therapeutic efficacy of two treatment modalities alone radiofrequency ablation therapy (RFA), PEGylated liposomal doxorubicin (PLD) equivalent to Doxil, and their combination...
February 16, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28215455/lung-ablation-best-practice-results-response-assessment-role-alongside-other-ablative-therapies
#10
REVIEW
T de Baere, L Tselikas, G Gravel, F Deschamps
Today, in addition to surgery, other local therapies are available for patients with small-size non-small-cell lung cancer (NSCLC) and oligometastatic disease from various cancers. Local therapies include stereotactic ablation radiotherapy (SABR) and thermal ablative therapies through percutaneously inserted applicators. Although radiofrequency ablation (RFA) has been explored in series with several hundreds of patients with pulmonary tumours, investigation of the potential of other ablation technologies including microwave ablation, cryoablation, and irreversible electroporation is ongoing...
February 16, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28214487/radiofrequency-ablation-with-concomitant-stab-phlebectomy-increases-risk-of-endovenous-heat-induced-thrombosis
#11
Caitlin W Hicks, Sandra R DiBrito, J Trent Magruder, M Libby Weaver, Cathy Barenski, Jennifer A Heller
OBJECTIVE: Endovenous heat-induced thrombosis (EHIT) is a well-documented phenomenon that follows endovenous ablation, but the treatment, surveillance, and risk factors for EHIT have yet to be comprehensively elucidated. We sought to identify characteristics that may put patients at higher risk for development of EHIT after radiofrequency ablation (RFA) for the treatment of symptomatic superficial venous insufficiency. METHODS: A retrospective review was performed of all consecutive patients undergoing treatment with RFA to the great saphenous vein by a single surgeon from July 2013 through October 2015...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28203089/impact-of-tumor-volume-doubling-time-on-post-metastatic-survival-in-bone-or-soft-tissue-sarcoma-patients-treated-with-metastasectomy-and-or-radiofrequency-ablation-of-the-lung
#12
Tomoki Nakamura, Akihiko Matsumine, Motoshi Takao, Atsuhiro Nakatsuka, Takao Matsubara, Kunihiro Asanuma, Akihiro Sudo
Metastasectomy represents the standard treatment for improving survival in patients with lung metastases (LMs) from bone (BS) or soft-tissue sarcoma (STS). Recently, radiofrequency ablation (RFA) of the LMs has been proved to be a useful option which can promise the similar effect to metastasectomy. The aim of this study was to determine prognostic factors, including tumor volume doubling time (TVDT), for post-metastatic survival in BS and STS patients treated with metastasectomy and/or RFA of the lung. Forty-eight patients with LMs were retrospectively reviewed...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28195178/recurrence-of-barrett-s-esophagus-is-rare-following-endoscopic-eradication-therapy-coupled-with-effective-reflux-control
#13
Srinadh Komanduri, Peter J Kahrilas, Kumar Krishnan, Tim McGorisk, Kiran Bidari, David Grande, Laurie Keefer, John Pandolfino
OBJECTIVES: Recent data suggest that effective control of gastroesophageal reflux improves outcomes associated with endoscopic eradication therapy (EET) for Barrett's esophagus (BE). However, the impact of reflux control on preventing recurrent intestinal metaplasia and/or dysplasia is unclear. The aims of the study were: (a) to determine the effectiveness and durability of EET under a structured reflux management protocol and (b) to determine the impact of optimizing anti-reflux therapy on achieving complete eradication of intestinal metaplasia (CE-IM)...
February 14, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28193132/finding-optimal-ablation-parameters-for-multipolar-radiofrequency-ablation
#14
Franz G M Poch, Christian Rieder, Hanne Ballhausen, Verena Knappe, Jörg Peter Ritz, Ole Gemeinhardt, Martin E Kreis, Kai S Lehmann
PURPOSE: Radiofrequency ablation (RFA) for primary liver tumors and liver metastases is restricted by a limited ablation size. Multipolar RFA is a technical advancement of RFA, which is able to achieve larger ablations. The aim of this ex vivo study was to determine optimal ablation parameters for multipolar RFA depending on applicator distance and energy input. METHODS: RFA was carried out ex vivo in porcine livers with three internally cooled, bipolar applicators in multipolar ablation mode...
February 1, 2017: Surgical Innovation
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
#15
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/28182306/effect-of-a-hypoxic-microenvironment-after-radiofrequency-ablation-on-residual-hepatocellular-cell-migration-and-invasion
#16
Yuyang Tong, Haiyun Yang, Xiaolin Xu, Jingliang Ruan, Ming Liang, Jiayi Wu, Baoming Luo
Clinical observations have shown that the boundary of tumor ablation is often less than safe border and that the use of radiofrequency ablation (RFA) in the treatment of hepatocellular carcinoma (HCC) may probably accelerate its recurrence and metastasis. RFA can cause the formation of a transition zone between normal liver tissues and necrotic coagulation, where blood stagnation and thrombosis expose residual cancer cells to a hypoxic microenvironment. As the blocked vessels are slowly reperfused, the oxygen supply is gradually restored...
February 9, 2017: Cancer Science
https://www.readbyqxmd.com/read/28181704/evaluation-of-the-safety-of-endoscopic-radiofrequency-ablation-for-malignant-biliary-stricture-using-a-digital-peroral-cholangioscope-with-videos
#17
Takeshi Ogura, Saori Onda, Tastsushi Sano, Wataru Takagi, Astushi Okuda, Akira Miyano, Nobu Nishioka, Miyuki Imanishi, Mio Amano, Daisuke Masuda, Kazuhide Higuchi
OBJECTIVES: The clinical impact of catheter based radiofrequency ablation (RFA) under ERCP guidance has been recently reported, however severe adverse events have also been noted. If tumor is not present in the biliary tract, severe adverse events such as perforation or bleeding due to vessel injury around the biliary tract may occur. In addition, the effectiveness of RFA may not be sufficient based solely on radiographic guidance. The aim of this study was to evaluate the actual feasibility of intraductal RFA by peroral cholangioscope (POCS) evaluation before/after RFA...
February 9, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28176952/needle-track-seeding-after-radiofrequency-ablation-for-hepatocellular-carcinoma-prevalence-impact-and-management-challenge
#18
REVIEW
Giampiero Francica
Neoplastic seeding may arise after radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC). A low risk of seeding after RFA (0-1.1%) has been reported, which may rise up to 2.5% if ablation followed diagnostic biopsy. Needle track seeding presents with one or multiple rounded nodules along the needle track located within the peritoneum, along the abdominal muscles, which were penetrated by the needle, pleural surface, or in the subcutaneous and cutaneous tissues. The most widely used method for the assessment of seeding nodules is ultrasound (US), which usually displays hypoechoic nodules with intralesional vascularization...
2017: Journal of Hepatocellular Carcinoma
https://www.readbyqxmd.com/read/28176349/early-detection-and-curative-treatment-of-hepatocellular-carcinoma-a-cost-effectiveness-analysis-in-france-and-in-the-united-states
#19
Benjamin Cadier, Julie Bulsei, Pierre Nahon, Olivier Seror, Alexis Laurent, Isabelle Rosa, Richard Layese, Charlotte Costentin, Carole Cagnot, Isabelle Durand-Zaleski, Karine Chevreul
: Hepatocellular carcinoma (HCC) is the leading cause of death in patients with cirrhosis. Patients outside clinical trials seldom benefit from evidence-based monitoring. The objective of this study was to estimate the cost-effectiveness of complying with HCC screening guidelines. The economic evaluation compared surveillance of patients with cirrhosis as recommended by the guidelines ("gold-standard monitoring") to "real-life monitoring" from the health care system perspective. A Markov model described the history of the disease and treatment course including current first-line curative treatment: liver resection, radiofrequency ablation (RFA), and liver transplantation...
February 8, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28176266/effects-on-the-torsional-vibration-behavior-in-the-investigation-of-dental-implant-osseointegration-using-resonance-frequency-analysis-a-numerical-approach
#20
Min Zhai, Bing Li, Dehua Li
Resonance frequency analysis (RFA) methods are widely used to assess implant stability, particularly the Osstell(®) device. The potential effects associated with this method have been discussed in the literature. Torsional RFA (T-RFA), mentioned in our previous study, could represent a new measurement method. The purpose of this study was to simulate T-shaped and Osstell(®) transducer-implant-bone system models; compare their vibration modes and corresponding resonance frequencies; and investigate the effects of their parameters, such as the effective implant length (EIL), bone quality, and osseointegration level, on the torsional resonance frequency (TRF) and bending resonance frequency (BRF) using three-dimensional finite element analysis...
February 7, 2017: Medical & Biological Engineering & Computing
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