1,635 results match your criteria radiofrequency needle

Towards quantitative and intuitive percutaneous tumor puncture via augmented virtual reality.

Comput Med Imaging Graph 2021 Mar 31;90:101905. Epub 2021 Mar 31.

Department of Computer Science and Engineering, Chinese University of Hong Kong, Hong Kong SAR, China.

In recent years, the radiofrequency ablation (RFA) therapy has become a widely accepted minimal invasive treatment for liver tumor patients. However, it is challenging for doctors to precisely and efficiently perform the percutaneous tumor punctures under free-breathing conditions. This is because the traditional RFA is based on the 2D CT Image information, the missing spatial and dynamic information is dependent on surgeons' experience. Read More

View Article and Full-Text PDF

Intercostal Nerve Block Using an Innovative Intraneedle Ultrasound Transducer: A Proof-of-Concept study.

Ultrasound Med Biol 2021 Apr 6. Epub 2021 Apr 6.

Institute of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, ROC. Electronic address:

Intercostal nerve block is a widely used and effective approach to providing regional anesthesia in the thoracic region for pain relief. However, during ultrasound-guided intercostal nerve block, inaccurate identification of the anatomic structures or suboptimal positioning of the needle tip may result in complications and blockade failure. In this study, we designed an intraneedle ultrasound (INUS) system and validated its efficacy in identifying anatomic structures relevant to thoracic region anesthesia. Read More

View Article and Full-Text PDF

Stereotactic Radiofrequency Ablation of Breast Cancer Liver Metastases: Short- and Long-Term Results with Predicting Factors for Survival.

Cardiovasc Intervent Radiol 2021 Apr 6. Epub 2021 Apr 6.

Department of Radiology, Section of Interventional Oncology - Microinvasive Therapy (SIP), Medical University of Innsbruck, Anichstr. 35, Innsbruck, 6020, Austria.

Purpose: To evaluate safety, local oncological control, long-term outcome and potential prognostic factors of stereotactic RFA (SRFA) for the treatment of BCLMs.

Methods: Between July 2003 and December 2019, 42 consecutive female patients with median age 54.0 years were treated with SRFA at our institution for 110 BCLMs in 48 ablation sessions. Read More

View Article and Full-Text PDF

Electrochemical treatment of ex vivo human abdominal skin and potential use in scar management: A pilot study.

Scars Burn Heal 2021 Jan-Dec;7:2059513120988532. Epub 2021 Mar 16.

Beckman Laser Institute & Medical Clinic, University of California - Irvine, Irvine, CA, USA.

Introduction: Scar treatments aim to address pathologic collagen deposition; however, they can be expensive or difficult to control. Electrochemical therapy (ECT) offers a simple alternative treatment. The purpose of this study is to examine the acid-base and histological changes in ex vivo human abdominal skin following ECT. Read More

View Article and Full-Text PDF

Discontinuous moving shot technique for conformal thermal ablation in an ex vivo porcine liver model.

Diagn Interv Radiol 2021 Mar 26. Epub 2021 Mar 26.

Department of Breast Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, China;Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing, China.

Purpose: We aimed to determine the ablation characteristics of discontinuous moving shot technique (DMST) in microwave ablation (MWA), radiofrequency ablation (RFA) and laser ablation (LA), and analyze the differences compared with fixed electrode technique (FET) in an ex vivo porcine liver model.

Methods: FET was defined as the ablation needle remaining fixed during ablation. In DMST, ablation needle moved backward for a fixed distance twice along the long axis during ablation. Read More

View Article and Full-Text PDF

Elastin-specific MRI of extracellular matrix-remodelling following hepatic radiofrequency-ablation in a VX2 liver tumor model.

Sci Rep 2021 Mar 25;11(1):6814. Epub 2021 Mar 25.

Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Charitéplatz 1, 10117, Berlin, Germany.

Hepatic radiofrequency ablation (RFA) induces a drastic alteration of the biomechanical environment in the peritumoral liver tissue. The resulting increase in matrix stiffness has been shown to significantly influence carcinogenesis and cancer progression after focal RF ablation. To investigate the potential of an elastin-specific MR agent (ESMA) for the assessment of extracellular matrix (ECM) remodeling in the periablational rim following RFA in a VX2 rabbit liver tumor-model, twelve New-Zealand-White-rabbits were implanted in the left liver lobe with VX2 tumor chunks from donor animals. Read More

View Article and Full-Text PDF

Imaging-guided radiofrequency ablation of osteoid osteoma in typical and atypical sites: Long term follow up.

PLoS One 2021 18;16(3):e0248589. Epub 2021 Mar 18.

Radiologia Interventistica, Istituto Nazionale Tumori IRCCS "Fondazione G. Pascale", Napoli (IT), Naples, Italy.

Purpose: To assess efficacy and safety of imaging-guided radiofrequency ablation (RFA) of Osteoid Osteoma (OO) in both typical and atypical sites.

Methods And Materials: Between January 2014 and March 2019, 102 consecutive percutaneous RFA were performed and retrospectively reviewed. The procedures were performed using a RFA bipolar ablation system (Covidien, exposed tip of 0. Read More

View Article and Full-Text PDF

A case of primary hepatic extranodal marginal zone B-cell mucosa-associated lymphoid tissue (MALT) lymphoma treated by radiofrequency ablation (RFA), and a literature review.

J Int Med Res 2021 Mar;49(3):300060521999539

First Department of Hepatobiliary and Pancreatic Surgery, The Second Hospital of Dalian Medical University, Dalian, China.

Primary hepatic mucosa-associated lymphoid tissue (MALT) lymphoma is an extremely rare liver malignancy that usually lacks characteristic imaging findings and which is often misdiagnosed. We report a 63-year-old woman diagnosed with primary hepatic extranodal marginal zone B-cell lymphoma, MALT type. The patient underwent needle biopsy and radiofrequency ablation (RFA), and showed no signs of relapse during the 12-month postoperative follow-up. Read More

View Article and Full-Text PDF

Short-term outcomes of radiofrequency ablation for hepatocellular carcinoma using cone-beam computed tomography for planning and image guidance.

World J Clin Cases 2021 Mar;9(7):1580-1591

Department of Interventional Therapy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.

Background: Percutaneous radiofrequency ablation (RFA) is an effective treatment for unresectable hepatocellular carcinoma (HCC) and a minimally invasive alternative to hepatectomy for treating tumour recurrence. RFA is often performed using contrast-enhanced computed tomography (CECT) and/or ultrasonography. In recent years, angiographic systems with flat panel image detectors and advanced image reconstruction algorithms have broadened the clinical applications of cone-beam computed tomography (CBCT), including RFA. Read More

View Article and Full-Text PDF

Diaphragmatic Hernia after Radiofrequency Ablation.

Diagnostics (Basel) 2021 Feb 14;11(2). Epub 2021 Feb 14.

Department of Gastroenterology and Neurology, Kagawa University Faculty of Medicine, 1750-1 Ikenobe Miki-cho, Kita-gun, Kagawa 761-0793, Japan.

Diaphragmatic hernia (DH) is a defect, which can be congenital or can develop later in life. Moreover, chromosomal and genetic abnormalities, environmental exposures, and nutritional deficiencies may be related to the development of congenital DH. In contrast, the risk factors of acquired DH include traumas, such as blunt injuries due to traffic accidents and surgical procedures. Read More

View Article and Full-Text PDF
February 2021

Ultrasonographic characteristics of thyroid nodule rupture after microwave ablation: Three case reports.

Medicine (Baltimore) 2021 Mar;100(9):e25070

Department of Ultrasonic.

Rationale: Thyroid nodule rupture is a rare complication after microwave ablation (MWA). The ultrasonographic characteristics, clinical course, treatment, or prognosis of thyroid nodule rupture after ablation have not been systematically summarized. Three cases with thyroid nodule rupture after MWA were reported in this study, including the characteristic ultrasound images before ablation and after rupture. Read More

View Article and Full-Text PDF

Needle Tract Ablation in Liver Tissue Using a Cryoprobe Combined with an Electrosurgical Device: Influence of ex vivo and in vivo Animal Models.

Acta Med Okayama 2021 Feb;75(1):9-14

Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences.

To assess the feasibility of needle tract ablation in liver tissue in ex vivo and in vivo animal models using a cryo-probe and electrosurgical device. The experimental device is made by inserting a cryoprobe through an intro-ducer sheath for insulation, with 2-cm of probe tip projecting out. A beagle liver was punctured by the device, and electric current was applied at 30-W with the electrosurgical knife touching the non-insulated device base. Read More

View Article and Full-Text PDF
February 2021

Influence of the heat irrigating effect of radiofrequency ablation on regional liver tissue in Bama miniature pigs.

World J Gastrointest Oncol 2021 Feb;13(2):109-118

Department of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing 100853, China.

Background: The results of the heat irrigating effect of radiofrequency ablation (RFA) are uncertain, and the accurate impact of the heat irrigating effect on regional liver tissue is unknown due to a lack of control experiments.

Aim: The aim of this study was to determine the influence of the heat irrigating effect of RFA on regional liver tissue in Bama miniature pigs.

Methods: Eight Bama miniature pigs were randomly divided into the observation group (group A) and the control group (group B), with 4 pigs/group. Read More

View Article and Full-Text PDF
February 2021

Bipolar radiofrequency ablation treatment of liver cancer employing monopolar needles: A comprehensive investigation on the efficacy of time-based switching.

Comput Biol Med 2021 Apr 16;131:104273. Epub 2021 Feb 16.

School of Engineering and Information Technology, Faculty of Science and Technology, Federation University, VIC, 3350, Australia.

Radiofrequency ablation (RFA) is a thermal ablative treatment method that is commonly used to treat liver cancer. However, the thermal coagulation zone generated using the conventional RFA system can only successfully treat tumours up to 3 cm in diameter. Switching bipolar RFA has been proposed as a way to increase the thermal coagulation zone. Read More

View Article and Full-Text PDF

A novel internal cold circulation radiofrequency-assisted device for liver transection.

Int J Hyperthermia 2021 ;38(1):308-315

Department of Hepatopancreatobiliary Surgery, The Affiliated Tumor Hospital of Zhengzhou University, Henan, People's Republic of China.

Purpose: To evaluate the safety and efficacy of a new internal cold circulation bipolar radiofrequency compared with Habib-4X bipolar radiofrequency device in the resection of liver tumors.

Methods: A total of 85 patients with hepatocellular carcinoma who received radiofrequency-assisted liver resection from February 2017 to January 2020 were retrospectively enrolled in our study, in which 45 patients received the new internal cold circulation bipolar radiofrequency (New-RF) and 40 patients received Habib-4X bipolar radiofrequency (Habib-4X). Primary outcome measures were the speed of liver transection, the width of coagulation tissue, hemorrhage volume, blood transfusion rate, and operation time. Read More

View Article and Full-Text PDF
January 2021

Recurrent medullary thyroid carcinoma treated with percutaneous ultrasound-guided radiofrequency ablation: A case report.

World J Clin Cases 2021 Feb;9(4):864-870

Department of Ultrasound, First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China.

Background: Treatment for neck lymph node metastases after adequate initial surgery in medullary thyroid carcinoma (MTC) has been controversial. Ultrasound (US)-guided radiofrequency ablation (RFA) has been widely used in recurrent well-differentiated thyroid carcinoma. Here, we report for the first time the use of RFA in a patient with recurrent MTC. Read More

View Article and Full-Text PDF
February 2021

Diagnostic block and radiofrequency ablation of the acromial branches of the lateral pectoral and suprascapular nerves for shoulder pain: a 3D cadaveric study.

Reg Anesth Pain Med 2021 Apr 11;46(4):305-312. Epub 2021 Feb 11.

Physical Medicine and Rehabilitation, University Health Network, Toronto, Canada.

Background And Objectives: Acromial branches of the lateral pectoral and suprascapular nerves have been proposed as targets for diagnostic block and radiofrequency ablation to treat superior shoulder pain; however, the nerve capture rates of these procedures have not been investigated. The objectives of this study were to use dissection and 3D modeling technology to determine the course of these acromial branches, relative to anatomical landmarks, and to evaluate nerve capture rates using ultrasound-guided dye injection and lesion simulation.

Methods: Ultrasound-guided dye injections, targeting the superior surface of coracoid process and floor of supraspinous fossa, were performed (n=5). Read More

View Article and Full-Text PDF

General versus local anesthesia for percutaneous radiofrequency ablation of hepatocellular carcinoma at unusual regions.

J Cancer Res Ther 2020 ;16(7):1686-1690

Department of Interventional Radiology, The First Medical Centre of Chinese PLA General Hospital, Beijing, China.

Aims: The aim of this study is to compare the efficacy and safety of percutaneous radiofrequency ablation (RFA) under general anesthesia or local anesthesia plus intraoperative analgesia in the treatment of hepatocellular carcinoma (HCC) at unusual regions.

Subjects And Methods: From July 2012 to October 2019, 83 consecutive patients with 107 HCC lesions were treated with interventional radiology therapy. The lesions were located at some unusual regions such as diaphragmatic surface, hepatic hilum, hepatic subcapsular region, tissues near inferior vena cava, and tissues near the colon. Read More

View Article and Full-Text PDF
January 2020

A retrospective study of CT-guided percutaneous irreversible electroporation (IRE) ablation: clinical efficacy and safety.

BMC Cancer 2021 Feb 5;21(1):124. Epub 2021 Feb 5.

Department of Radiology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, 197#, Rui Jin Er Road, Shanghai, 200025, People's Republic of China.

Background: To evaluate the clinical efficacy and safety of ablating renal cell carcinoma (RCC) by irreversible electroporation (IRE).

Methods: Fifteen patients (19 lesions) with RCC who underwent IRE were retrospectively reviewed. Seven patients had solitary kidneys. Read More

View Article and Full-Text PDF
February 2021

[Ablative therapies of pancreatic neoplasms.]

Recenti Prog Med 2021 Jan;112(1):75-80

The interest for pancreatic neoplasm ablation under endoscopic ultrasound (EUS) guidance has increased during the last decade because of technology advancement and availability of dedicated devices for thermal ablation. The most commonly used technique is radiofrequency ablation (RFA). Currently, three needle-electrodes and one "through-the-needle" probe are available. Read More

View Article and Full-Text PDF
January 2021

Residual tumor and central lymph node metastasis after thermal ablation of papillary thyroid carcinoma: A case report and review of literature.

World J Clin Cases 2021 Jan;9(1):252-261

Department of General Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Discipline Construction Research Center of China Hospital Development Institute, Shanghai Jiao Tong University, Shanghai 200011, China.

Background: Debate exists regarding the use of thermal ablation (TA) to treat papillary thyroid carcinoma (PTC). Some studies have recommended TA as a new, efficient and safe technology for PTC. In this article, we report one case of a residual tumor and central lymph node metastasis (CLNM) after TA for PTC. Read More

View Article and Full-Text PDF
January 2021

Endovascular In Situ Fenestration Technique of Aortic Arch Pathology: A Systematic Review and Meta Analysis.

Ann Vasc Surg 2021 Jan 25. Epub 2021 Jan 25.

Department of Cardio-Vascular Surgery, Air Force Medical Center of People's Liberation Army, Beijing, China. Electronic address:

Objective: The aim of this study was to evaluate the safety, applicability and outcomes of the endovascular in situ fenestration (ISF) technique for patients with aortic arch pathologies by performing a systematic review.

Methods: We conducted a systematic search using the PubMed, Embase, and Cochrane databases to identify English language articles between January 2004 and March 2019 on the management of aortic arch pathologies using an in situ fenestration technique. Two independent observers selected studies for inclusion in the study, assessed the methodological quality of the included studies, and extracted the data. Read More

View Article and Full-Text PDF
January 2021

VersaCross radiofrequency system reduces time to left atrial access versus conventional mechanical needle.

J Interv Card Electrophysiol 2021 Jan 22. Epub 2021 Jan 22.

Division of Cardiology, Vancouver General Hospital, University of British Columbia, 2775 Laurel Street, Level 9, Vancouver, BC, V5Z1M9, Canada.

Background: Despite maturing experience, transseptal puncture (TSP) remains a challenging part of percutaneous left atrial appendage closure (LAAC) and has inherent risks and safety concerns in accessing the left atrium (LA). The VersaCross radiofrequency (RF) system (Baylis Medical), a new RF-tipped pigtail wire-based TSP system, may facilitate LA access by serving as an exchange support wire once access is achieved.

Methods: We retrospectively compared TSP safety and procedural efficiency in 10 consecutive LAAC cases using the VersaCross RF system to 10 cases using the conventional BRK1-XS mechanical needle (Abbott Vascular). Read More

View Article and Full-Text PDF
January 2021

Risk factors for local tumor progression after RFA of pulmonary metastases: a matched case-control study.

Eur Radiol 2021 Jan 20. Epub 2021 Jan 20.

Institut Gustave Roussy, 114 Rue Edouard Vaillant, 94800, Villejuif, France.

Objectives: Curative treatment of oligometastatic pulmonary disease aims at eradication of all metastases. Radiofrequency ablation (RFA) has been shown to be an efficient method and the frequency of local tumor progression (LTP) should be minimized. The objective of this study was to determine the morphological and treatment-related risk factors for LTP after RFA of pulmonary metastases. Read More

View Article and Full-Text PDF
January 2021

[A Resected Case for Needle-Tract Implantation after Radiofrequency Ablation to the Hepatocellular Carcinoma].

Gan To Kagaku Ryoho 2020 Dec;47(13):2110-2112

Dept. of Hepato-Biliary-Pancreatic Surgery, Osaka City General Hospital.

A 82-year-old female had received radiofrequency ablation for hepatocellular carcinoma(HCC)in segment 2 30 months before surgery. One month before surgery, enhanced CT showed enhanced lesion about 20 mm in diameter in the abdominal wall along the needle-tract. There was no other recurrent lesion including liver. Read More

View Article and Full-Text PDF
December 2020

Microneedling for the Treatment of Scars: An Update for Clinicians.

Clin Cosmet Investig Dermatol 2020 22;13:997-1003. Epub 2020 Dec 22.

University of California, Department of Dermatology, Irvine, CA, USA.

Background: Microneedling (MN) is used for the treatment of scars, amongst other indications. Although used in Asia and the Middle East for decades, related to the supposed lack of post-procedure pigmentary alterations even in darker skin types, MN only recently gained attention in the United States as an effective, well-tolerated aesthetic treatment.

Materials And Methods: A systematic review of the Medline database was completed using search terms "microneedle" or "microneedling" or "micro needle" or "micro needling" and "scar". Read More

View Article and Full-Text PDF
December 2020

A Simple Method to Avoid Bile Duct Injury during Percutaneous Radiofrequency Ablation Therapy for Hepatocellular Carcinoma.

Case Rep Oncol 2020 Sep-Dec;13(3):1337-1342. Epub 2020 Nov 16.

Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan.

Hepatocellular carcinoma represents a major global health burden. Its treatment is often complicated by the anatomical location of tumors, which can lead to adverse outcomes. Radiofrequency ablation has recently gained attention as a safe method for treating hepatocellular carcinoma, but only in tumors that are not adjacent to bile ducts. Read More

View Article and Full-Text PDF
November 2020