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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"radiofrequency ablation"”.
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Modeling of carbonization and stalling during radiofrequency ablation and electrosurgery
Radiofrequency (RF) thermal therapies, including RF ablation and electrosurgery, function by delivering alternating currents in the 100 kHz-1 MHz range to biological tissues. These currents generate electric fields that drive ionic oscillations in intracellular and extracellular fluids, producing …
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Radiofrequency ablation versus cryoablation in the treatment of atrioventricular nodal reentrant tachycardia
… cases per year in the United States. Catheter ablation of AV node tissue has become the first-line definitive treatment for AVNRT, owing to its high efficacy, tolerability, and safety. Two modalities of ablation, radiofrequency (RF) and cryoablation are commonly utilized in clinical practice …
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Real Time Frequency Analysis of Signals From Lasso Catheter For Radiofrequency Ablation During Atrial Fibrillation
… signals obtained through lasso catheter during radiofrequency ablation of pulmonary vein was performed to determine the channel with dominant frequency. Threshold algorithm was used for signals which could be classified as type I and type II AF. Type III AF Signals which were highly fractionated …
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Harnessing the Immunomodulatory Potential of Radiofrequency Ablation to Improve Therapeutic Outcomes in Pancreatic Ductal Adenocarcinoma
… modify the TME is endoscopic ultrasound-guided radiofrequency ablation (EUS-RFA). However, there is still minimal understanding around its wider impact on stromal remodeling and immunological activation. This study investigates the immunomodulatory effects of RFA combined with neoadjuvant …
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A 3-Dimensional In Silico Test Bed for Radiofrequency Ablation Catheter Design Evaluation and Optimization
… treatment for AF is percutaneous catheter ablation to isolate arrhythmogenic areas from the rest of the atrium. The standard <em>in vitro</em> evaluation of ablation catheters through lesion studies is a resource intensive effort due to tissue variability and visual measurement methods, …
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Minimally invasive CT-guiding excision of benign bone tumours
… guided intralesional excision and percutaneous radiofrequency ablation. We aim to evaluate the outcomes of patients treated with computerised tomography (CT guided) intralesional excision and bone grafting of small benign lesions of bone. Method: A retrospective folder review of patients treated …
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Advances in the endoscopic management of esophageal neoplasia using ultrahigh speed endoscopic optical coherence tomography
… BE. 3) Laboratory studies using OCT to monitor radiofrequency ablation (RFA) dynamics with concurrent OCT imaging in ex vivo swine specimens. The scope of this thesis includes the design and development of novel imaging devices, laboratory imaging studies with both ex vivo and in vivo animal …
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Thermal Ablation Alters The Tumor Microenvironment Activating A Robust Immune Response.
<p>THERMAL ABLATION ALTERS THE TUMOR MICROENVIRONMENT ACTIVATING A ROBUST IMMUNE RESPONSE.</p> <p>Matthew T Campbell, M.D.</p> <p>Advisor Professor: Padmanee Sharma, M.D Ph.D</p> <p>Ablation techniques including radiofrequency ablation (RFA) and cryoablation have been shown to influence the immune …
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Nanoparticle preconditioning for enhanced thermal therapies in cancer.
… preconditioning was tested in combination with radiofrequency ablation and cryosurgery in a translational model of rabbit kidney tumors. The current work builds on our understanding of the mechanisms of nanoparticle preconditioning for enhancement of thermal therapy which could lead to the …
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Volumetric Acoustic Radiation Force Impulse Imaging Using Intracardiac Echocardiography
… of clinical purposes including monitoring of ablation lesion formation and myocardial substrate characterization. However, 2-D field-of-view ICE catheters currently in use in the clinic have difficulties imaging face-on regions of myocardial tissue, requiring meticulous and time-consuming …
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Mapping Myocardial Elasticity with Intracardiac Acoustic Radiation Force Impulse Methods
… and heart failure, as well as for guidance of ablation therapy for the treatment of arrhythmias. This thesis tests the hypothesis that with appropriately designed imaging sequences, intracardiac acoustic radiation force impulse (ARFI) imaging and shear wave elasticity imaging (SWEI) are viable …
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Improving the safety and efficacy of bimodal electric tissue ablation.
Introduction: Bimodal electric tissue ablation (BETA) is a new method of ablation, which combines the process of electrolysis with radiofrequency ablation (RFA) to increase the size of tissue ablations. The cathode of the electrolytic circuit is connected to the radiofrequency (RF) electrode to …
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Revisione critica dei risultati e nuovi algoritmi decisionali sulla chirurgia dell'OSAS
… include septoplasty, turbinectomy, and radiofrequency ablation (RF) of the turbinates. Surgical procedures to reduce soft palate redundancy include uvulopalatopharyngoplasty with or without tonsillectomy, uvulopalatal flap, laser-assisted uvulopalatoplasty, and RF of the soft palate. …
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Interventional Approaches and Diagnosis of Malignancies of the Hepatobiliary System /// Интервенционални подходи и диагностика при злокачествени заболявания на хепато-билиарната система
Интервенционална радиология (IR), известна също като съдова и несъдова радиология или хирургична радиология, осигурява минимално инвазивни образни методи за лечение на заболявания на всяка система и органи. Въпреки че процедурите, извършвани от интервенционални рентгенолози са много, като …
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Approximate Thermal Modeling of Radiofrequency Cardiac Ablation
… thesis is to increase the efficacy and safety of radiofrequency catheter ablation (RFCA) of cardiac tissue. The purpose of RFCA is to carefully heat selected locations in the heart. The resulting thermal injury creates lesions which prevent the generation or propagation of arrhythmias. The ability …