نتایج جستجو برای: fractionated microneedle radiofrequency
تعداد نتایج: 28518 فیلتر نتایج به سال:
We have investigated the effect of increasing numbers of hyperthermia fractions given at 7-day intervals, with or without fractionated radiotherapy, on tumor cure, tumor growth, and cell survival after in vivo or in vitro heat. The murine RIF tumor was treated by capacitive radiofrequency hyperthermia at 44.0 degrees C for 20 min for one to five treatments at weekly intervals (1-5 wk D1). Singl...
BACKGROUND In patients with mechanical aortic and mitral valves and left ventricular tachycardia, catheter ablation may be prevented by limited access to the left ventricle. METHODS AND RESULTS In our series of 6 patients, 2 patients underwent direct surgical ablation and 4 underwent epicardial catheter ablation via a pericardial window. All patients had abnormal low voltage areas with fracti...
AIMS Although useful, percutaneous left atrial ablation for pulmonary vein isolation (PVI) does not eliminate atrial fibrillation (AF) in all patients. The ablation of complex fractionated atrial electrograms (CFAEs) has been proposed as an adjunctive strategy to improve the maintenance of sinus rhythm after PVI. Our objective was to analyse the efficacy of adjunctive CFAE ablation. METHODS A...
BACKGROUND Ablation of idiopathic ventricular arrhythmias (VAs) with epicardial or intramural origins is technically challenging. Herein, we have described the successful ablation of left VAs via the coronary venous system (CVS) in conjunction with endocardial map guided by three-dimensional electroanatomical map in six patients. METHODS Out of a total consecutive 84 patients with symptomatic...
A 54-year-old man was referred for ablation of symptomatic drug-refractory long-lasting persistent atrial fibrillation. His past medical history was negative for cardiac disease but included a diagnosis of esophageal achalasia. The patient underwent an ablation procedure, guided by barium esophagram, including isolation of the pulmonary veins, ablation of complex fractionated left atrial electr...
In this multi-center pilot study, the safety pro le of high intensity focused radiofrequency (RF) delivered to the dermis was evaluated for safety in the treatment of the aging neck and face. A newly designed insulated microneedle system delivers a signi cant coagulative thermal injury into the dermis while sparing the epidermis from RF injury. Thirty- ve healthy subjects from seven aesthetic p...
In this research, we have optimized a fabrication technique for manufacturing microneedle arrays in standard silicon wafer ((100) orientation) using potassium hydroxide (KOH) wet etching. The etch behaviour of silicon was simulated for different mask shapes and sizes using SIMODE software. In the context of the fabrication process, we demonstrate the influence of the mask design and the process...
Collection of sweat via pilocarpine iontophoresis is commonly used to diagnose cystic fibrosis (CF), with thousands of tests performed each day. The main source of resistance to the passage of pilocarpine ions to the sweat glands is the electrical resistance of the stratum corneum. It was hypothesized that pretreating the skin with 0·5 mm-long microneedles would significantly decrease this resi...
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