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https://www.readbyqxmd.com/read/27925468/the-prediction-of-radiofrequency-ablation-zone-volume-using-vascular-indices-of-3-dimensional-volumetric-color-doppler-ultrasound-in-an-in-vitro-blood-perfused-bovine-liver-model
#1
Samuel Chang, Anthony C Lanctot, Martin D McCarter, Katherine M Roberts, Deborah H Glueck, Gerald D Dodd
OBJECTIVE: To determine the most reliable predictor of radiofrequency (RF) ablation zone volume among 3D volumetric color Doppler vascular indices in in-vitro blood-perfused bovine liver model. METHODS: 3D color Doppler volume data of the local hepatic parenchyma were acquired from 37 areas of 13 bovine livers connected to in-vitro oxygenated blood perfusion system. Doppler vascular indices of vascularization index (VI), flow index (FI), and vascularization-flow index (VFI) were obtained from the volume data using a 3D volume analysis software...
December 7, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27924066/assessment-of-atrial-electromechanical-interval-using-echocardiography-after-catheter-ablation-in-patients-with-persistent-atrial-fibrillation
#2
Xiaodong Chen, Minglong Chen, Yingying Wang, Bing Yang, Weizhu Ju, Fengxiang Zhang, Kejiang Cao
We sought to investigate variation of atrial electromechanical interval after catheter ablation procedure in patients with persistent atrial fibrillation using pulse Doppler (PW) and pulse tissue Doppler imaging (PW-TDI). A total of 25 consecutive in-patients with persistent atrial fibrillation, who restored sinus rhythm after ablation procedure, were recruited in our cardiac center. Echocardiography was performed on each patient at 2 hours, 1 day, 5 days, 1 month and 3 months after the ablation therapy, and atrial electromechanical delay was measured simultaneously by PW and PW-TDI...
November 2016: Journal of Biomedical Research
https://www.readbyqxmd.com/read/27922849/renal-denervation-for-uncontrolled-hypertension-critical-review-of-the-evidence
#3
Chongjia Chen, Ashish Upadhyay
PURPOSE OF REVIEW: Hypertension (HTN) is a major global public health problem. Endovascular catheter-based radiofrequency ablation of renal sympathetic nerve endings (renal denervation) is a novel treatment option for uncontrolled HTN. RECENT FINDINGS: Early clinical studies primarily in Australia and Europe established renal denervation as a well tolerated and feasible procedure that resulted in a sustained reduction in blood pressure among individuals with severe resistant HTN...
December 2, 2016: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27922814/iatrogenic-pneumopericardium-after-pericardiocentesis
#4
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Bharatraj Banavalikar, Arun Gopalakrishnan, Srinivasa Prasad, Ajitkumar Valaparambil, Jaganmohan Tharakan
A 65-year-old patient underwent pericardiocentesis for cardiac tamponade after radiofrequency ablation for ventricular tachycardia. Subsequent to stabilization, the patient developed pneumopericardium, which was detected in the catheterization laboratory and managed successfully by pericardial aspiration.
December 2016: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27921028/two-year-results-after-convective-radiofrequency-water-vapor-thermal-therapy-of-symptomatic-benign-prostatic-hyperplasia
#5
Christopher M Dixon, Edwin Rijo Cedano, Dalibor Pacik, Vítězslav Vit, Gabriel Varga, Lennart Wagrell, Thayne R Larson, Lance A Mynderse
OBJECTIVE: The objective of this study was to assess the effectiveness and safety of convective radiofrequency (RF) water vapor thermal therapy in men with lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH); a pilot study design with 2-year follow-up evaluations. PATIENTS AND METHODS: Men aged ≥45 years with an International Prostate Symptom Score ≥13, a maximum urinary flow rate (Qmax) ≤15 mL/s, and prostate volume 20-120 cc were enrolled in a prospective, open-label pilot study using convective RF water vapor energy with the Rezūm System...
2016: Research and Reports in Urology
https://www.readbyqxmd.com/read/27920861/colon-cancer-metastasis-to-the-sternum-palliative-treatment-with-radiofrequency-ablation-and-cement-injection
#6
Bryan E Wessel, Douglas Coldwell
Colon cancer metastasis to bone is extremely rare and has devastating consequences on patients' quality of life. Furthermore, radiofrequency ablation in conjunction with cementoplasty to nonweight bearing, flat bones has not been widely reported as palliative treatment for pain as a result of bone metastasis. Here, we present a case of a 47-year-old man who developed a sternal metastasis from an invasive adenocarcinoma of the colon originally diagnosed several years prior. The pain from the metastasis was originally treated with external beam radiation therapy, but after 6 weeks of continuous pain, it was retreated using radiofrequency ablation in conjunction with cementoplasty...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920857/aortic-air-embolus-following-pulmonary-tumor-radiofrequency-ablation
#7
Roger Stimpson, Suhag Patel, Rohan Shah, Junjian Huang, Sumit Chhadia, Vivek Yedavalli, Mark Saker
Aortic air embolism following a computed tomography (CT) guided percutaneous transthoracic procedure is a rare occurrence, but one that can have dire consequences. We present a case of a 48-year old female diagnosed with aortic air embolism during percutaneous radiofrequency ablation of a pulmonary mass. A large amount of intra-aortic air can be seen on the CT images just before the patient suffered acute cardiac arrest. Although this is a rare occurrence, recognition and management of this complication is important for physicians who perform any percutaneous transthoracic procedures...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920837/temporal-sinus-node-modification-by-high-dose-continuous-intravenous-administration-of-landiolol-in-a-patient-with-persistent-inappropriate-sinus-tachycardia
#8
Yuichi Hori, Shiro Nakahara, Naofumi Anjo, Yoshihiko Sakai, Isao Taguchi
A 20-year-old woman underwent an electrophysiological study for drug-resistant persistent inappropriate sinus tachycardia (IST). Use of a high-dose continuous intravenous administration of landiolol, a short-acting beta-adrenoreceptor blocker, made the patient׳s heart rate suddenly drop with a slight change in the P-wave morphology. Three-dimensional right atrial (RA) activation mapping revealed that the earliest activation site moved 8 mm to a lower anterior site around the high lateral RA. Radiofrequency energy applied to the earliest activation site during tachycardia was successful...
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27920830/impact-of-catheter-ablation-of-ventricular-tachycardia-in-patients-with-prior-myocardial-infarctions
#9
Masato Fukunaga, Masahiko Goya, Kenichi Hiroshima, Kentaro Hayashi, Masatsugu Ohe, Yu Makihara, Michio Nagashima, Yoshimori An, Shinichi Shirai, Kenji Ando, Hiroyoshi Yokoi, Masashi Iwabuchi
BACKGROUND: Catheter ablation can reduce episodes of ventricular tachycardia (VT) after myocardial infarction (MI). However, the optimal endpoint of the ablation procedure remains unclear. METHODS: Fifty-one consecutive patients who received catheter ablation for VT after MI were included. The procedures targeted the isthmus of all the induced, sustained VTs. When the patients with induced VTs were hemodynamically stable, radiofrequency energy was delivered at the mid-diastolic potential recording site during VT...
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27920582/surgeons-early-experience-with-the-acessa%C3%A2-procedure-gaining-proficiency-with-new-technology
#10
Kelli M Braun, Mark Sheridan, Erin Z Latif, Lexy Regush, Anet Maksymowicz, Laura Weins, Mohamed A Bedaiwy, Nerissa Tyson, Marilyn J Davidson, Barry H Sanders
PURPOSE: Successful adoption of a new surgical procedure varies among practicing surgeons, and skill acquisition depends on the surgeon's innate ability, the complexity of the technique, and training. We report intraoperative and near-term postoperative outcomes from the Acessa procedure conducted by minimally invasive gynecologic surgeons new to Acessa, and report the surgeons' experiences during the training period. PATIENTS AND METHODS: The study was designed as a postmarket, prospective, single-arm, multicenter analysis of operative and early postoperative outcomes after proctored surgical training with the Acessa device and procedure (laparoscopic ultrasound-guided radiofrequency volumetric thermal ablation of symptomatic fibroids) in premenopausal, menstruating women as conducted in community and university hospitals in the USA and Canada...
2016: International Journal of Women's Health
https://www.readbyqxmd.com/read/27919856/postoperative-day-one-serum-alanine-aminotransferase-does-not-predict-patient-morbidity-and-mortality-after-elective-liver-resection-in-non-cirrhotic-patients
#11
Ricky Harminder Bhogal, Amit Nair, Davide Papis, Zaed Hamady, Jawad Ahmad, For Tai Lam, Saboor Khan, Gabriele Marangoni
Serum aminotransferases have been used as surrogate markers for liver ischemia-reperfusion injury that follows liver surgery. Some studies have suggested that rises in serum alanine aminotransferase (ALT) correlate with patient outcome after liver resection. We assessed whether postoperative day 1 (POD 1) ALT could be used to predict patient morbidity and mortality following liver resection. We reviewed our prospectively held database and included consecutive adult patients undergoing elective liver resection in our institution between January 2013 and December 2014...
December 2016: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/27919123/-clinical-study-of-percutaneous-radiofrequency-ablation-for-small-renal-tumor
#12
Ryo Fujiwara, Hiroto Yamashita, Katsuji Imoto, Michio Yamazaki, Chul Jang Kim
Percutaneous radiofrequency ablation (PRFA) has been applied as an option of minimally invasive treatment for small renal tumor. We retrospectively evaluated 5 patients with small renal tumor for whom PRFA was performed at our hospital. The average age was 69.6 years (range 45-86), average tumor diameter 20.0 mm (8-34), average preoperative glomerular filtration rate (eGFR) 66.8 ml/min/1.73m2 (42. 1-93.2), and follow-up period was 23.4 months (8-34). There were two minor complications (grade 1), including perirenal hematoma and pain at the probe insertion site in each patient...
October 2016: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/27918772/energy-based-facial-rejuvenation-advances-in-diagnosis-and-treatment
#13
Christopher J Britt, Benjamin Marcus
Importance: The market for nonsurgical, energy-based facial rejuvenation techniques has increased exponentially since lasers were first used for skin rejuvenation in 1983. Advances in this area have led to a wide range of products that require the modern facial plastic surgeon to have a large repertoire of knowledge. Objective: To serve as a guide for current trends in the development of technology, applications, and outcomes of laser and laser-related technology over the past 5 years...
December 1, 2016: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/27918004/what-devices-to-use-or-not-use-in-skin-of-color
#14
Murad Alam
Lasers and light sources, as well as other energy devices, including radiofrequency, ultrasound, and cold-based therapies, can be used for treatment of aging, dyschromic, or texturally uneven skin. In patients with ethnic skin (ie, skin of color), energy devices are used more cautiously to avoid adverse events. The most common and concerning adverse event is postinflammatory hyperpigmentation. Lower fluence, longer pulse durations, and careful device selection can mitigate the risk of scarring and pigmentary abnormality...
December 2016: Seminars in Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/27917310/radiofrequency-ablation-of-uterine-fibroids-a-review
#15
REVIEW
Bruce B Lee, Steve P Yu
Laparoscopic, ultrasound-guided radiofrequency ablation (RFA) is a new, FDA-cleared uterine sparing, outpatient procedure for uterine fibroids. The procedure utilizes recent technological advancements in instrumentation and imaging, allowing surgeons to treat numerous fibroids of varying size and location in a minimally invasive fashion. Early and mid-term data from multi-center clinical trials have demonstrated safety and efficacy, with resolution or improvement of symptoms and significant volume reduction...
2016: Current Obstetrics and Gynecology Reports
https://www.readbyqxmd.com/read/27917099/radiofrequency-ablation-for-dysplastic-and-nondysplastic-barrett-esophagus
#16
George Triadafilopoulos
No abstract text is available yet for this article.
September 2016: Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27916915/evaluation-of-a-tracking-system-for-patients-and-mixed-intravenous-medication-based-on-rfid-technology
#17
María Martínez Pérez, Guillermo Vázquez González, Carlos Dafonte
At present, one of the primary concerns of healthcare professionals is how to increase the safety and quality of the care that patients receive during their stay in hospital. This is particularly important in the administration of expensive and high-risk medicines with which it is fundamental to minimize the possibility of adverse events in the process of prescription-validation-preparation/dosage-dispensation-administration of intravenous mixes. This work is a detailed analysis of the evaluation, carried out by the health personnel involved in the Radiofrequency Identification (RFID) system developed in the Day Hospital and Pharmacy services of the Complejo Hospitalario Universitario A Coruña (CHUAC)...
November 30, 2016: Sensors
https://www.readbyqxmd.com/read/27916745/transcatheter-non-contact-microwave-ablation-may-enable-circumferential-renal-artery-denervation-while-sparing-the-vessel-intima-and-media
#18
Pierre C Qian, Michael A Barry, Sara Al-Raisi, Pramesh Kovoor, Jim Pouliopoulos, Chrishan Nalliah, Abhishek Bhaskaran, William Chik, Rahul Kurup, Virginia James, Winny Varikatt, Alistair McEwan, Aravinda Thiagalingam, Stuart P Thomas
AIMS: Trials of transcatheter renal artery denervation (RDN) have failed to show consistent antihypertensive efficacy. Procedural factors and limitations of radiofrequency ablation can lead to incomplete denervation. We hypothesized that non-contact microwave catheter ablation could produce deep circumferential perivascular heating while avoiding the renal artery intima and media injury. METHOD AND RESULTS: A novel microwave catheter was designed and tested in a renal artery model consisting layers of phantom materials embedded with a thermochromic liquid crystal sheet, colour range 50-78°C...
December 6, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27916509/singlet-order-conversion-and-parahydrogen-induced-hyperpolarization-of-13-c-nuclei-in-near-equivalent-spin-systems
#19
James Eills, Gabriele Stevanato, Christian Bengs, Stefan Glöggler, Stuart J Elliott, Javier Alonso-Valdesueiro, Giuseppe Pileio, Malcolm H Levitt
We have demonstrated two radiofrequency pulse methods which convert the nuclear singlet order of proton spin pairs into the magnetisation of nearby (13)C nuclei. These irradiation schemes work well in the near-equivalence regime of the three-spin system, which applies when the difference in the two (1)H-(13)C couplings is much smaller than the (1)H-(1)H coupling. We use pulse sequences to generate thermally polarized singlet states in a reproducible manner, and study the singlet-to-magnetisation transfer step...
December 1, 2016: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/27916360/combined-resection-and-rfa-in-colorectal-liver-metastases-stratification-of-long-term-outcomes
#20
Kazunari Sasaki, Georgios A Margonis, Nikolaos Andreatos, Yuhree Kim, Ana Wilson, Faiz Gani, Neda Amini, Timothy M Pawlik
BACKGROUND: Combined hepatic resection and radiofrequency ablation (resection-RFA) is a widely accepted multidisciplinary treatment for unresectable colorectal cancer liver metastases. Worse prognosis after resection-RFA is correlated to tumor morphology, although unfavorable morphology is inherent to this patient cohort. This study aimed to select patients who may or may not benefit from resection-RFA with the aid of tumor biology. METHOD: Data from 485 patients who underwent curative hepatectomy with or without concurrent RFA were retrospectively collected and analyzed...
November 2016: Journal of Surgical Research
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