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Monopolar radiofrequency

Alessandro Giamberti, Francesca R Pluchinotta, Massimo Chessa, Alessandro Varrica, Raffaele Vitale, Alessandro Frigiola, Carlo Pappone, Marco Ranucci
AIMS: Supraventricular arrhythmias are a major cause of morbidity and mortality in adult patients with congenital heart disease (CHD). Intraoperative ablation offers an alternative for patients who failed ablation procedures or are requiring concomitant surgical intervention. We present our long-term results with the surgical treatment of arrhythmias in adults with CHD (ACHD) undergoing elective cardiac surgery and the clinical predictors for arrhythmia recurrence. METHODS AND RESULTS: Between 2002 and 2013, 80 consecutive patients with CHD, mean age of 39 years, underwent intraoperative ablation with monopolar irrigated radiofrequency during cardiac surgery procedures...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Michaela Huber, Markus Loibl, Christoph Eder, Richard Kujat, Michael Nerlich, Sebastian Gehmert
PURPOSE: This cadaver study investigated the temperature profile in the wrist joint and distal radioulnar joint (DRUJ) during radiofrequency energy (RFE) application for triangular fibrocartilage complex resection. METHODS: An arthroscopic partial resection of the triangular fibrocartilage complex using monopolar and bipolar RFE was simulated in 14 cadaver limbs. The temperature was recorded simultaneously in the DRUJ and at 6 other anatomic locations of the wrist during RFE application...
September 20, 2016: Journal of Hand Surgery
Su Joa Ahn, Jeong Min Lee, Dong Ho Lee, Sang Min Lee, Jung-Hwan Yoon, Yoon Jun Kim, Jeong-Hoon Lee, Su Jong Yu, Joon Koo Han
BACKGROUND AND AIMS: Although ultrasonography (US) guided radiofrequency ablation (RFA) is a commonly used treatment option for early hepatocellular carcinoma (HCC), inconspicuous tumors on US limits its feasibility. Thus, we prospectively determined whether real-time US-CT/MR fusion imaging can improve the technical feasibility of RFA compared with B mode US, and help predict local tumor progression (LTP) after RFA in patients with HCC. METHODS: A total of 216 patients with 243 HCCs ⩽ 5 cm referred for RFA were prospectively enrolled...
September 17, 2016: Journal of Hepatology
Li Zhang, Xin-Li Ding, Xu-Li Zhao, Jun-Nan Wang, Yan-Ping Li, Ming Tian
BACKGROUND: The efficacy of percutaneous intradiscal radiofrequency thermocoagulation (PIRFT) for the treatment of discogenic low back pain (LBP) remains controversial. However, all the PIRFT studies utilized monopolar radiofrequency thermocoagulation (RFTC). The aim of this study was to investigate the safety and efficacy of bipolar RFTC for the treatment of discogenic LBP. METHODS: A total of 23 patients with discogenic LBP were treated with single-level bipolar RFTC...
2016: Chinese Medical Journal
Rita Quesada, Ignasi Poves, Enrique Berjano, Carles Vilaplana, Anna Andaluz, Xavier Moll, Dimitri Dorcaratto, Luis Grande, Fernando Burdio
PURPOSE: To evaluate the impact of using monopolar thermal coagulation based on radiofrequency (RF) currents on intraoperative blood loss during liver resection. MATERIALS AND METHODS: A prospective randomised controlled trial was planned. Patients undergoing hepatectomy were randomised into two groups. In the control group (n = 10), hemostasis was obtained with a combination of stitches, vessel-sealing bipolar RF systems, sutures or clips. In the monopolar radiofrequency coagulation (MRFC) group (n = 18), hemostasis was mainly obtained using an internally cooled monopolar RF electrode...
October 5, 2016: International Journal of Hyperthermia
Gustavo Leibaschoff, Pablo Gonzalez Izasa, Jose Luis Cardona, John R Miklos, Robert D Moore
OBJECTIVE: The aim of this study was to evaluate the effects of non-ablative, monopolar transcutaneous temperature controlled radiofrequency (TTCRF) technology in the treatment of postmenopausal women suffering from genuine stress urinary incontinence (SUI) related to menopause and to evaluate histological changes vaginally associated with the treatment. MATERIALS AND METHODS: Subjective and objective symptoms of SUI were assessed in study subjects before and after TTCRF, (1 treatment every 30 days, for 3 months; n=10) and compared with the effects of a placebo treatment on a control group of demographically similar women (n =10)...
September 10, 2016: Surgical Technology International
Julia Dendle, Douglas C Wu, Sabrina G Fabi, Diana Melo, Mitchel P Goldman
BACKGROUND: Subsurface monopolar radiofrequency (SMRF) has emerged as a new method for reducing skin laxity via the controlled delivery of thermal energy below the skin using a radiofrequency probe. OBJECTIVE: To evaluate the overall efficacy of the treatment and satisfaction ratings of subjects who underwent a single SMRF treatment to the face, neck, or jawline (or some combination). MATERIALS AND METHODS: A retrospective, single-center study was conducted in which data were obtained via subject follow-ups at 90 and 180 days posttreatment...
August 31, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
Jin Woo Choi, Jeong Min Lee, Dong Ho Lee, Jeong-Hee Yoon, Kyung-Suk Suh, Jung-Hwan Yoon, Yoon Jun Kim, Jeong-Hoon Lee, Su Jong Yu, Joon Koo Han
OBJECTIVE: This study was conducted to evaluate the outcomes of multi-channel switching RFA using a separable cluster electrode in patients with HCC. METHODS: From November 2011 to July 2013, 79 patients with 98 HCCs < 5 cm were enrolled and treated with RFA using a multi-channel switching radiofrequency system and a separable cluster electrode under the guidance of a real-time fusion imaging system. The primary and secondary endpoints were the 3-year local tumor progression (LTP) rate and recurrence-free survival (RFS) rate, respectively...
2016: PloS One
Douglas C Wu, Anamarie Liolios, Leysin Mahoney, Isabella Guiha, Mitchel P Goldman
BACKGROUND: Subsurface thermistor-controlled monopolar radiofrequency (SMRF) is an emerging technology designed to offer a minimally invasive option for tightening of lax skin. The versatility of this technique allows it to be applied to virtually any body site. OBJECTIVE: The purpose of this study is to evaluate the safety and efficacy of SMRF for tightening of posterior upper arm skin laxity. PATIENTS: This is a prospective, open-label clinical trial involving 12 subjects aged 18 to 65 with moderate-to-severe skin laxity in the posterior upper arms...
September 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
Masashi Hirooka, Hironori Ochi, Atsushi Hiraoka, Yohei Koizumi, Yoshio Tokumoto, Masanori Abe, Kojiro Michitaka, Kouji Joko, Yoichi Hiasa
AIM: This study aimed to compare multipolar radiofrequency ablation (RFA) with monopolar RFA as the major treatment for nodules of hepatocellular carcinoma in the caudate lobe. METHODS: This retrospective study was approved by the institutional review board. Data were reviewed from 101 patients who met the Milan criteria and were treated by multipolar RFA (n = 22) or monopolar RFA (n = 79). After propensity score matching, complications and local tumor progression were compared between the two groups...
August 10, 2016: Hepatology Research: the Official Journal of the Japan Society of Hepatology
Sabrina Guillen Fabi, Ane B M Niwa Massaki, Mitchel P Goldman
The objective of this study was to demonstrate the efficacy and safety of a monopolar radiofrequency treatment for facial and neck laxity in men. Twelve men received one treatment of the face and upper portion of the neck using an RF system with comfort pulsed technology. Standardized photographs were taken at baseline and at 1, 3, and 6 months of follow-up. Study investigators evaluated facial and neck laxity at baseline and all follow-up visits using the Fasil Laxity Scale. Patents and investigators assessed skin texture and overall appearance using the Quartile Improvement Scale...
2016: Skinmed
Ilja L Kruglikov
Electrically layered tissue structure significantly modifies distribution of radiofrequency (RF) current in the dermis and in the subcutaneous adipose tissue comparing to that in a homogeneous medium. On the basis of the simple model of RF current distribution in a two-layer skin containing dermis and subcutis, we assess the influence of the dermal thickness on the current density in different skin layers. Under other equal conditions, current density in the dermis is higher for the skin having thinner dermis...
2016: BioMed Research International
Wafaa Karaki, Ali Akyildiz, Suvranu De, Diana-Andra Borca Tasciuc
This paper explores energy dissipation in ex-vivo liver tissue during radiofrequency current excitation with application in electrosurgery. Tissue surface temperature for monopolar electrode configuration is measured using infrared thermometry. The experimental results are fitted to a finite element model for transient heat transfer taking into account energy storage and conduction in order to extract information about "apparent" specific heat, which encompasses storage and phase change. The average apparent specific heat determined for low temperatures is in agreement with published data...
July 27, 2016: IEEE Transactions on Bio-medical Engineering
A Avantaggiato, G Bertuzzi, T Addonisio, G Iannucci, U Vitiello, F Carinci
Among non-ablative procedures in aesthetic medicine, the radiofrequency (RF) is one of the most popular for the treatment of face and body skin laxity. It can be classified as a physical bio-stimulation that produces a temperature increase on biological structures, using electromagnetic waves. The term encompasses devices having substantial differences in energy, wavelengths, handpieces dimension and structure. Moreover, for some of these, the protocols are only partially defined. The aim of this short review is to clarify some aspecst of the RF therapy starting from the physics, passing through the mechanism of action and finally, with the most suitable protocols...
April 2016: Journal of Biological Regulators and Homeostatic Agents
Arnaud Hocquelet, Christophe Aubé, Agnès Rode, Victoire Cartier, Olivier Sutter, Anne Frederique Manichon, Jérome Boursier, Gisèle N'kontchou, Philippe Merle, Jean-Frédéric Blanc, Hervé Trillaud, Olivier Seror
BACKGROUND & AIMS: The primary aim of this study was to compare the rate of global radiofrequency ablation (RFA) failure between monopolar RFA (MonoRFA) versus NoTouch MultiBipolar RFA (NTmbpRFA) for small hepatocellular carcinoma (HCC) ⩽5cm in cirrhotic patients. METHODS: A total of 362 cirrhotic patients were included retrospectively across 4 French centres (181 per treatment group). Global RFA failure (primary RFA failure or local tumor progression) was analysed using the Kaplan Meier method after coarsened exact matching...
July 12, 2016: Journal of Hepatology
Ji-Hye Park, Jung-In Kim, Hee Jin Park, Won-Serk Kim
Recently, a number of modalities have been used for noninvasive fat reduction. Radiofrequency (RF) technology is a promising tool for noninvasive body and face contouring. The aim of this study is to evaluate the efficacy and safety of novel noninvasive RF technology for the reduction of submental fat with 6 months of follow-up. Twenty-one subjects with submental fat accumulation were treated twice at 1-month intervals with monopolar RF, which could also be used to monitor real-time temperature. The submental fat thickness and the circumference were evaluated with ultrasonography and a tape measure, respectively, at baseline followed by 1 and 6 months after the last treatment (0, 2, and 7 months)...
July 12, 2016: Lasers in Medical Science
Eun Jin Kim, Hyoung Il Kwon, Un Cheol Yeo, Joo Yeon Ko
As demand for a youthful appearance has increased, various techniques for face lifting and contouring have been used to reduce excess fat deposition and improve skin laxity. Recently, radiofrequency (RF)-assisted lipolysis and liposuction (RFAL) has been introduced for body and face contouring. This study aimed to evaluate the clinical improvement and safety of a new RFAL device for face lifting and contouring. A prospective study was conducted in 20 Korean patients who underwent an internal real-time thermosensing monopolar RFAL procedure...
September 2016: Lasers in Medical Science
Cheng-Fu Wan, Yan Liu, Dao-Song Dong, Lin Zhao, Qi Xi, Xue Yu, Wen-Yao Cui, Qiu-Shi Wang, Tao Song
BACKGROUND: Postherpetic neuralgia (PHN) is often refractory to existing treatments. Treatment of the dorsal root ganglion (DRG) using monopolar pulsed radiofrequency (PRF), which is a non- or minimally neurodestructive technique, is not efficacious in all patients. OBJECTIVES: This study aimed to determine the safety and clinical efficacy of bipolar high-voltage, long-duration PRF on the DRG in PHN patients. STUDY DESIGN: Self before-after controlled clinical trial...
July 2016: Pain Physician
Hasan Emre Koçak, Bengül Altaş, Salih Aydın, Ümit Taşkın, Mehmet Faruk Oktay, Mustafa Suphi Elbistanlı, Ayşe Pelin Yiğider
OBJECTIVE: The aim of this study is to compare the early results of monopolar (MP) and bipolar (BP) radiofrequency (RF) used in inferior turbinate hypertrophy treatment concerning aspects of patient and surgeon comfort. STUDY DESIGN: Prospective randomized single-blind study. MATERIALS AND METHODS: The study included 71 patients with inferior turbinate hypertrophy resistant to medical treatment. BP RF was applied to 36 patients. MP RF was applied to 35 patients...
May 24, 2016: Otolaryngologia Polska. the Polish Otolaryngology
Zhenhua Zeng, Min Yan, Yi Dai, Weidong Qiu, Shuo Deng, Xinzhu Gu
Lumbar disc herniation is usually managed with conservative treatment or surgery. However, conservative therapy seldom yields good results, and surgery is associated with multiple complications. This study aimed to assess bipolar radiofrequency thermocoagulation for the treatment of lumbar disc herniation. A total of 168 patients with lumbar disc herniation suitable for radiofrequency thermocoagulation were enrolled and randomized to monopolar radiofrequency thermocoagulation (control group, n=84) or bipolar radiofrequency thermocoagulation (experimental group, n=84) treatment groups...
August 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
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