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Monopolar radiofrequency

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https://www.readbyqxmd.com/read/28721494/a-comprehensive-characterization-of-parameters-affecting-high-frequency-irreversible-electroporation-lesions
#1
Tyler Miklovic, Eduardo L Latouche, Matthew R DeWitt, Rafael V Davalos, Michael B Sano
Several focal therapies are being investigated clinically to treat tumors in which surgery is contraindicated. Many of these ablation techniques, such as radiofrequency ablation and microwave ablation, rely on thermal damage mechanisms which can put critical nerves or vasculature at risk. Irreversible electroporation (IRE) is a minimally invasive, non-thermal technique to destroy tumors. A series of short electric pulses create nanoscale defects in the cell membrane, eventually leading to cell death. Typical IRE protocols deliver a series of 50-100 µs monopolar pulses...
July 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28714203/posterior-cordotomy-in-bilateral-vocal-cord-paralysis-using-monopolar-microelectrodes-and-radiofrequency-in-18-patients
#2
J Basterra, Y Castillo-Lopez, R Reboll, E Zapater, C Olavarria, F Krause, R Hernandez, M Torres, F Tocornal
Posterior cordotomy is an option in the surgical treatment of bilateral vocal cord paralysis in adduction. We present results obtained in 18 patients with bilateral vocal cord paralysis in adduction treated using microelectrodes terminal with tips in several angles, and a radiofrequency generator from 2008 to 2013. The functional outcome was evaluated using postoperative spirometry, the decannulation time, and swallowing. All patients except one were successfully decannulated and showed an increase in mid-inspiratory flow rates...
July 17, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28678582/efficacy-of-monopolar-dielectric-transmission-radiofrequency-in-panniculus-adiposus-and-cellulite-reduction
#3
Manuel Albornoz-Cabello, Alfonso Javier Ibáñez Vera, Blanca De la Cruz-Torres
INTRODUCTION: Despite its high incidence rate, there are few studies regarding cellulite treatment. Most of them present non-validated evaluation tools. Radio frequency is a focused treatment very used in aesthetics to reduce it. OBJECTIVES: To know the efficacy of Monopolar Dielectric Radiofrequency (MDR) treatment in dynamic application to reduce cellulite, panniculus adiposus and gluteal and posterior thigh regions. METHODS: Experimental study consisting of inferior members of nine women...
July 5, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28670170/re-should-we-use-a-monopolar-or-bipolar-mode-for-performing-no-touch-radiofrequency-ablation-of-liver-tumors-clinical-practice-might-have-already-resolved-the-matter-once-and-for-all
#4
Olivier Seror, Olivier Sutter
No abstract text is available yet for this article.
July 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28665165/use-of-a-controlled-subdermal-radiofrequency-thermistor-for-treating-the-aging-neck-consensus-recommendations
#5
Anneke Andriessen, Brian M Kinney, Barry E DiBernardo, Jason Bloom, Dennis F Branson, Richard D Gentile, David J Goldberg, Paul Z Lorenc, Mark Nestor, Douglas Wu
INTRODUCTION: A new temperature-controlled device has been used as a percutaneous radiofrequency probe to treat lax submental and other facial areas. It has significant advantages over other aesthetic devices as it provides the dual benefit of fat lipolysis and skin tightening. Our goal here is to present consensus recommendations for treating the aging neck. METHODS: A panel of 11 expert physicians convened in Dallas, Texas on October 15, 2016 to arrive at a consensus on the best current practice for submental skin tightening and contour improvement...
June 30, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28556393/evaluation-of-the-safety-and-efficacy-of-a-monopolar-nonablative-radiofrequency-device-for-the-improvement-of-vulvo-vaginal-laxity-and-urinary-incontinence
#6
Shelena Lalji, Paula Lozanova
BACKGROUND AND OBJECTIVE: Vaginal childbirth, natural process of aging, congenital factors, and surgical interventions are considered the main causes of vulvo-vaginal laxity driven by changes in collagen and elastin fibers. This causes a loss of strength and flexibility within the vaginal wall. As a result, women may experience lack of sensation and stress urinary incontinence (SUI)-the condition of involuntary loss of urine associated with activities that cause an increase in intra-abdominal pressure (eg, sneezing, coughing, and lifting)...
May 29, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28485289/comparative-assessment-of-monopolar-and-bipolar-radiofrequency-surgery-of-inferior-turbinate
#7
RANDOMIZED CONTROLLED TRIAL
Hasan Emre Koçak, Bengül Altaş, Salih Aydın, Ümit Taşkın, Mehmet Faruk Oktay, Mustafa Suphi Elbistanlı, Ayşe Pelin Yiğider
OBJECTIVE: The aim of this study was to compare early outcomes of monopolar (MP) and bipolar (BP) radiofrequency (RF) treatment of inferior turbinate hypertrophy from the perspective of both the patient and the surgeon. STUDY DESIGN: Prospective, randomized, single-blind study. MATERIALS AND METHODS: Seventy-one patients with inferior turbinate hypertrophy resistant to medical treatment. BP RF was used in 36 patients and MP RF in 35 patients, respectively...
July 10, 2016: Otolaryngologia Polska
https://www.readbyqxmd.com/read/28474275/comparison-of-mono-and-bipolar-radiofrequency-ablation-in-benign-thyroid-disease
#8
Yücel Korkusuz, Alexander Mader, Daniel Gröner, Shadi Ahmad, Oscar Maximilian Mader, Frank Grünwald, Christian Happel
PURPOSE: Radiofrequency ablation (RFA) is an approved minimal invasive method for the treatment of benign thyroid nodules. Several experimental, mainly ex vivo animal studies have compared the effectiveness of different RFA procedures in liver tissue. The aim of this retrospective clinical study was to evaluate the difference between monopolar and bipolar RFA in thyroid tissue considering thyroid volume reduction, patient discomfort and ultrasound evaluation. METHODS: Eighteen patients with symptomatic complex benign thyroid nodules were treated in a single RFA session...
May 4, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28474219/impact-of-radiofrequency-energy-on-intraoperative-outcomes-of-laparoscopic-colectomy-for-cancer-in-obese-patients
#9
Diletta Cassini, Michelangelo Miccini, Matteo Gregori, Farshad Manoochehri, Gianandrea Baldazzi
Nowadays laparoscopic approach is accepted as a valid alternative to open surgery for the treatment of colorectal cancer. Several studies consider this approach to be safe and feasible also in obese patients, even if dissection in these patients may require a longer operative time and involve higher blood loss. To facilitate laparoscopic approach, more difficult in these patients, several energy sources for laparoscopic dissection and sealing, has been adopted recently. The aim of this study is to investigate the possible intraoperative advantages of radiofrequency energy in terms of blood loss and operative time in obese patients undergoing laparoscopic resection for cancer...
May 4, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28445542/no-touch-radiofrequency-ablation-using-multiple-electrodes-an-in-vivo-comparison-study-of-switching-monopolar-versus-switching-bipolar-modes-in-porcine-livers
#10
Won Chang, Jeong Min Lee, Jeong Hee Yoon, Dong Ho Lee, Sang Min Lee, Kyoung Bun Lee, Bo Ram Kim, Tae-Hyung Kim, Seunghyun Lee, Joon Koo Han
OBJECTIVE: To evaluate the in vivo technical feasibility, efficiency, and safety of switching bipolar (SB) and switching monopolar (SM) radiofrequency ablation (RFA) as a no-touch ablation technique in the porcine liver. MATERIALS AND METHODS: The animal care and use committee approved this animal study and 16 pigs were used in two independent experiments. In the first experiment, RFA was performed on 2-cm tumor mimickers in the liver using a no-touch technique in the SM mode (2 groups, SM1: 10 minutes, n = 10; SM2: 15 minutes, n = 10) and SB-mode (1 group, SB: 10 minutes, n = 10)...
2017: PloS One
https://www.readbyqxmd.com/read/28440238/thermal-ablation-of-pancreatic-cyst-with-a-prototype-endoscopic-ultrasound-capable-radiofrequency-needle-device-a-pilot-feasibility-study
#11
Maria Moris, Mustafa Atar, Abdurrahman Kadayifci, Murli Krishna, Ariston Librero, Eugene Richie, William Brugge, Michael B Wallace
BACKGROUND AND OBJECTIVES: Pancreatic cysts are evaluated by endoscopic ultrasound and fine needle aspiration (EUS). The only accepted treatment is pancreatectomy, which is associated with morbidity and mortality. This study evaluated the optimal thermal dosimetry of a novel radiofrequency ablation device using a standard electrosurgical unit in ex vivo cyst models. METHODS: A modified EUS 22-gauge monopolar needle prototype with a tip electrode connected to a standard electrosurgical unit (Erbe USA, Marietta, GA, USA) was used to induce a subboiling point temperature...
March 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28403104/effect-of-bipolar-pulsed-radiofrequency-on-refractory-chronic-cervical-radicular-pain-a-report-of-two-cases
#12
Min Cheol Chang
RATIONALE: Despite undergoing transforaminal epidural steroid injection (TFESI), many patients complain of persisting cervical radicular pain. For the management of chronic cervical radicular pain, clinicians are widely applying pulsed radiofrequency (PRF) stimulation to dorsal root ganglions (DRGs). To enhance the effect of PRF stimulation, we conducted bipolar PRF stimulation in 2 patients with chronic cervical radicular pain that was refractory to monopolar PRF and repeated TFESIs...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28248888/comparison-between-bipolar-pulsed-radiofrequency-and-monopolar-pulsed-radiofrequency-in-chronic-lumbosacral-radicular-pain-a-randomized-controlled-trial
#13
RANDOMIZED CONTROLLED TRIAL
Min Cheol Chang, Yun Woo Cho, Sang Ho Ahn
BACKGROUND: Chronic lumbosacral radicular pain is a challenging medical problem with respect to therapeutic management. Many patients with lumbosacral radicular pain complain of persistent leg pain after transforaminal epidural steroid injection. Nowadays, pulsed radiofrequency (PRF) stimulation on the dorsal root ganglion (DRG) is widely used for controlling lumbosacral radicular pain. METHODS: We evaluated the effect of bipolar PRF on the DRG for the management of lumbosacral radicular pain...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28246508/no-touch-radiofrequency-ablation-a-comparison-of-switching-bipolar-and-switching-monopolar-ablation-in-ex-vivo-bovine-liver
#14
Won Chang, Jeong Min Lee, Sang Min Lee, Joon Koo Han
OBJECTIVE: To evaluate the feasibility, efficiency, and safety of no-touch switching bipolar (SB) and switching monopolar (SM) radiofrequency ablation (RFA) using ex vivo bovine livers. MATERIALS AND METHODS: A pork loin cube was inserted as a tumor mimicker in the bovine liver block; RFA was performed using the no-touch technique in the SM (group A1; 10 minutes, n = 10, group A2; 15 minutes, n = 10) and SB (group B; 10 minutes, n = 10) modes. The groups were compared based on the creation of confluent necrosis with sufficient safety margins, the dimensions, and distance between the electrode and ablation zone margin (DEM)...
March 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28191716/clinical-efficacy-and-safety-evaluation-of-a-novel-fractional-unipolar-radiofrequency-device-on-facial-tightening-a-preliminary-report
#15
Dong Hye Suh, Eun Jung Byun, Sang Jun Lee, Kye Yong Song, Hei Sung Kim
BACKGROUND: Previous studies have shown that radiofrequency (RF) energy is safe and effective for improving skin laxity. Unlike monopolar and bipolar devices, little has been studied with the unipolar hand piece. OBJECTIVES: We sought to evaluate the safety and efficacy of a novel fractional unipolar RF device on facial tightening. PATIENTS AND METHODS: This was a retrospective, single-center study of 14 subjects with age-related facial laxity who underwent five sessions of fractional unipolar RF at an interval of 2 weeks, and then followed-up for 3 months...
February 13, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28161079/effect-of-single-treatment-surface-cooled-radiofrequency-therapy-on-vaginal-laxity-and-female-sexual-function-the-viveve-i-randomized-controlled-trial
#16
RANDOMIZED CONTROLLED TRIAL
Michael Krychman, Christopher G Rowan, Bruce B Allan, Leonard DeRogatis, Scott Durbin, Ashley Yacoubian, Deborah Wilkerson
INTRODUCTION: Vaginal laxity is a highly prevalent and undertreated medical condition. AIM: To evaluate the efficacy and safety of surface-cooled, monopolar radiofrequency (RFc) therapy for the treatment of vaginal laxity in the VIVEVE I trial. METHODS: The VIVEVE I trial was a prospective, randomized, single-blinded, and sham-controlled study. Nine study centers in Canada, Italy, Spain, and Japan participated. Women presenting with vaginal laxity were screened and informed consent was obtained...
February 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28128685/scar-remodeling-with-the-association-of-monopolar-capacitive-radiofrequency-electric-stimulation-and-negative-pressure
#17
Giovanni Nicoletti, Paola Perugini, Sara Bellino, Priscilla Capra, Alberto Malovini, Omar Jaber, Marco Tresoldi, Angela Faga
OBJECTIVE: A study was established to objectively assess the effects of low-intensity electromagnetic and electric stimulation plus negative pressure on mature scars. BACKGROUND: Radiofrequency plus negative pressure therapy demonstrated a favorable reorganization and regeneration of the collagen and elastic fibers and was proposed for the treatment of cellulitis and skin stretch marks. METHODS: Twenty-six mature scars in 20 Caucasian patients (15 females and 5 males) were enrolled in the study...
May 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28095539/a-proposed-method-for-upper-eyelid-and-infrabrow-tightening-using-a-transcutaneous-temperature-controlled-radiofrequency-device-with-opaque-plastic-eye-shields
#18
Douglas J Key, Lauren Boudreaux
BACKGROUND: Laxity of the eyelid and periorbital area, a common manifestation of aging, is usually addressed via blepharoplasty and/ or fat transfer. Given the trend toward safer, less invasive treatments preferred by those patients reticent to undergo more invasive procedures, viable alternatives have been sought. Transcutaneous temperature controlled radiofrequency (TTCRF) integrates non- invasive super cial RF treatment with automatic temperature feedback control of energy deposition, as a stimulator of overall collagen remodeling; however, the globe of the eye is particularly sensitive to RF energy...
November 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/27862748/potential-of-a-no-touch-pincer-ablation-procedure-that-uses-a-multipolar-radiofrequency-ablation-system-to-prevent-intrasubsegmental-recurrence-of-small-and-single-hepatocellular-carcinomas
#19
Yusuke Kawamura, Kenji Ikeda, Shunichiro Fujiyama, Tetsuya Hosaka, Masahiro Kobayashi, Satoshi Saitoh, Hitomi Sezaki, Norio Akuta, Fumitaka Suzuki, Yoshiyuki Suzuki, Yasuji Arase, Hiromitsu Kumada
OBJECTIVE: The aim of this study was to clarify the usefulness of a no-touch pincer ablation procedure that uses bipolar electrodes to prevent intrasubsegmental tumor recurrence after radiofrequency ablation (RFA) for patients with hepatocellular carcinoma (HCC). METHODS: We studied 303 consecutive patients with HCC (single nodule and tumor diameter ≤30 mm) who received RFA between January 2005 and April 2015; 268 patients received touch ablation using a monopolar or bipolar RFA device, and 35 received no-touch ablation using a bipolar RFA device...
November 15, 2016: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/27782774/effect-of-change-in-portal-vein-flow-rates-on-hepatic-ablations-created-with-a-bipolar-radiofrequency-ablation-device
#20
Gerald D Dodd, Anthony C Lanctot, Kimberly E Lind
Purpose To investigate the effect of change in portal vein flow rates on the size and shape of ablations created by a bipolar radiofrequency (RF) ablation device. Materials and Methods This study was exempt from institutional animal care and use committee review. An in vitro bovine liver model perfused with autologous blood via the portal vein at three flow rates (60, 80, 100 mL/min per 100 g of liver) was used. Four ablations, two bipolar and two monopolar (control probe), were made in each of five livers perfused at each flow rate...
May 2017: Radiology
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