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https://www.readbyqxmd.com/read/28226508/temperature-monitoring-during-radiofrequency-ablation-of-liver-in-vivo-trials
#1
P Saccomandi, G Frauenfelder, C Massaroni, M A Caponera, A Polimadei, F Taffoni, F M Di Matteo, G Costamagna, F Giurazza, E Schena, P Saccomandi, G Frauenfelder, C Massaroni, M A Caponera, A Polimadei, F Taffoni, F M Di Matteo, G Costamagna, F Giurazza, E Schena, F Taffoni, F M Di Matteo, F Giurazza, E Schena, G Costamagna, A Polimadei, G Frauenfelder, P Saccomandi, C Massaroni
Radiofrequency ablation (RFA) is a minimally invasive procedure used to treat tumors by means of hyperthermia, mostly through percutaneous approach. The tissue temperature plays a pivotal role in the achievement of the target volume heating, while sparing the surrounding healthy tissue from thermal damage. Several techniques for thermometry during RFA are investigated, most of them based on the use of single-point measurement system (e.g., thermocouples). The measurement of temperature map is crucial for the real-time control and fine adjustment of the treatment settings, to optimize the shape and size of the ablated volume...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225913/ultrasound-as-a-safe-and-reliable-guidance-for-subarachnoid-puncture-in-rabbits
#2
Ivan Dias Fernandes Pereira, Roberto Bezerra Vital, Ronaldo Silva, Felipe Gilberto Valerini, Vania Maria de Vasconcelos Machado, Mariangela Esrher Marques, Helio Miot, Lais Helena Navarro, Eliana Marisa Ganem
Purpose: To evaluate a model for studying the toxicity in nervous tissue and meninges using ultrasound to guide needle insertion into the subarachnoid space of rabbits, with the objective of avoiding injuries triggered by the puncture and by intraneural injection of solutions. Methods: Forty-five adult female rabbits were divided into 3 groups (G): G1 underwent subarachnoid puncture, G2 underwent subarachnoid injection of saline solution and G3 underwent subarachnoid injection of 0...
January 2017: Acta Cir├║rgica Brasileira
https://www.readbyqxmd.com/read/28216973/endoscopic-ultrasound-guided-gallbladder-drainage-for-acute-cholecystitis-long-term-outcomes-after-removal-of-a-self-expandable-metal-stent
#3
Ken Kamata, Mamoru Takenaka, Masayuki Kitano, Shunsuke Omoto, Takeshi Miyata, Kosuke Minaga, Kentaro Yamao, Hajime Imai, Toshiharu Sakurai, Tomohiro Watanabe, Naoshi Nishida, Masatoshi Kudo
AIM: To assess the long-term outcomes of this procedure after removal of self-expandable metal stent (SEMS). The efficacy and safety of endoscopic ultrasound-guided gallbladder drainage (EUS-GBD) with SEMS were also assessed. METHODS: Between January 2010 and April 2015, 12 patients with acute calculous cholecystitis, who were deemed unsuitable for cholecystectomy, underwent EUS-GBD with a SEMS. EUS-GBD was performed under the guidance of EUS and fluoroscopy, by puncturing the gallbladder with a needle, inserting a guidewire, dilating the puncture hole, and placing a SEMS...
January 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28205397/pancreatic-involvement-by-metastasizing-neoplasms-as-determined-by-endoscopic-ultrasound-guided-fine-needle-aspiration-a-clinicopathologic-characterization
#4
Miroslav Sekulic, Khalid Amin, Tetyana Mettler, Lizette K Miller, Shawn Mallery, Jimmie Stewart
BACKGROUND: Pancreatic tumors often represent primary neoplasms, however organ involvement with metastatic disease can occur. The use of endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) to determine the underlying pathology provides guidance of clinical management. METHODS: 25 cases were identified in a retrospective review of our institution's records from 2006 to 2016. Clinical parameters and prognosis are described. RESULTS: Metastatic lesions to the pancreas diagnosed by EUS-FNA accounted for 4...
February 16, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28183582/use-of-ultrasound-for-spinal-anesthesia-in-a-super-morbidly-obese-patient
#5
Yasuhiro Morimoto, Yoichiro Ihara, Yoko Shimamoto, Hiroko Shiramoto
We report the application of ultrasound prescans for spinal anesthesia to morbid obesity patient. A 38-year-old woman with a body mass index (BMI) of 50 (weight: 110 kg; height: 148 cm) was scheduled to undergo pilonidal cyst resection at the bottom of the tailbone. Spinal anesthesia was selected for the procedure, because the patient's position during the surgery was prone and the patient had morbid obesity. To determine the spinal needle insertion point and the distance between the skin and dura, we planned to use ultrasound...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28178092/a-randomized-comparison-between-ultrasound-and-fluoroscopy-guided-sacral-lateral-branch-blocks
#6
Roderick J Finlayson, John-Paul B Etheridge, Maria Francisca Elgueta, Atikun Thonnagith, Frederick De Villiers, Bill Nelems, De Q Tran
BACKGROUND AND OBJECTIVES: This randomized trial compared ultrasound (US)- and fluoroscopy-guided sacral lateral branch (SLB) blocks. We hypothesized that US would require a shorter performance time. METHODS: Forty patients who required unilateral sacral lateral branch blocks for chronic low back pain were randomized to US or fluoroscopy guidance. Before the performance of the assigned block, an investigator who was not involved in patient care carried out baseline analgesic testing...
February 6, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28171697/eus-guided-tumor-ablation
#7
REVIEW
Sundeep Lakhtakia, Dong-Wan Seo
Real-time guidance of needle advancement has transformed Endoscopic Ultrasound from a diagnostic to an interventional procedure. EUS guided fine needle puncture has application in various interventional procedures (drainage of pseudocyst, biliary intervention, and injection of drugs). Celiac plexus or ganglion neurolysis for pain control is the major current EUS-guided fine-needle injection procedure. Feasibility and safety to accurately position needle devices and/or inject under real time EUS imaging with precise delivery of interventional agent have expanded the use of EUS to ablate tumor...
February 7, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28170030/toward-optical-guidance-during-endoscopic-ultrasound-guided-fine-needle-aspirations-of-pancreatic-masses-using-single-fiber-reflectance-spectroscopy-a-feasibility-study
#8
Paulien L Stegehuis, Leonora S F Boogerd, Akin Inderson, Roeland A Veenendaal, P van Gerven, Bert A Bonsing, J Sven Mieog, Arjen Amelink, Maud Veselic, Hans Morreau, Cornelis J H van de Velde, Boudewijn P F Lelieveldt, Jouke Dijkstra, Dominic J Robinson, Alexander L Vahrmeijer
No abstract text is available yet for this article.
February 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28168447/how-to-achieve-ultrasound-guided-femoral-venous-access-the-new-standard-of-care-in-the-electrophysiology-laboratory
#9
REVIEW
Benedict M Wiles, Nicholas Child, Paul R Roberts
PURPOSE: Bedside vascular ultrasound machines are increasingly available. They are used to facilitate safer vascular access across a number of different specialties. In the electrophysiology laboratory however, where patients are frequently anticoagulated and require the insertion of multiple venous sheaths, anatomical landmark techniques predominate. Despite the high number of vascular complications associated with electrophysiological procedures and the increasing evidence to support its use in electrophysiology, ultrasound remains underutilised...
February 7, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28163865/evaluation-of-the-success-rate-of-ultrasound-guided-transjugular-liver-biopsy-tjlb-and-the-associated-complications
#10
Masoud Pezeshki Rad, Hamidreza Sima, Reza Khazaeeian, Mahyar Mohammadifard
INTRODUCTION: Transjugular liver biopsy (TJLB) is a diagnostic radiological intervention, applied to patients with contraindications to percutaneous or laparoscopic liver biopsy. The aim of this study was to determine the safety, effectiveness, complications, and pathological impact of TJLB. METHODS: This cross-sectional study was conducted on 24 consecutive patients, undergoing TJLB at Imam Reza Hospital, affiliated to Mashhad University of Medical Sciences, from April 2010 to March 2011...
December 2016: Electronic Physician
https://www.readbyqxmd.com/read/28153573/development-and-assessment-of-a-novel-task-trainer-and-targeting-tasks-for-ultrasound-guided-invasive-procedures
#11
Joshua F Nitsche, Kristina M Shumard, Brian C Brost
RATIONALE AND OBJECTIVES: The American Institute of Ultrasound in Medicine (AIUM) recommends that all providers performing ultrasound-guided invasive procedures be competent in a core set of guidance skills common to all ultrasound-guided procedures, including in-plane and out-of-plane needle guidance and needle imaging optimization techniques such as probe translation, rotation, and heel-toe standoff. To allow for the practice and assessment of these core skills, we have created a novel task trainer and set of targeting tasks, and sought to obtain validity evidence in the content and response process domains for this training and assessment system according to the Standards for Educational and Psychological Testing...
January 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28152572/safety-and-efficacy-of-transhepatic-and-transsplenic-access-for-endovascular-management-of-portal-vein-complications-after-liver-transplantation-1
#12
Joon-Young Ohm, Gi-Young Ko, Kyu-Bo Sung, Dong-Il Gwon, Heung-Gyu Koh
OBJECTIVE: To evaluate and compare the safety and efficacy of endovascular management of the portal vein (PV) via percutaneous transsplenic access versus percutaneous transhepatic access in liver transplant recipients. METHODS: Eighteen patients who underwent endovascular management of PV via percutaneous transhepatic (n = 8) and transsplenic (n = 10) access were enrolled. Transsplenic access was chosen if the spleen was located in a normal position, the splenic vein was preserved, and the target lesion did not involve confluence of the superior mesenteric and splenic veins...
February 2, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28133613/contrast-enhanced-ultrasound-guided-biopsy-of-undetermined-abdominal-lesions-a-multidisciplinary-decision-making-approach
#13
Feng Mao, Yi Dong, Zhengbiao Ji, Jiaying Cao, Wen-Ping Wang
Aim. To investigate the value of contrast-enhanced ultrasound (CEUS) guided biopsy of undetermined abdominal lesions in multidisciplinary treatment (MDT) decision-making approach. Methods. Between Jan 2012 and Dec 2015, 60 consecutive patients (male, 37; female, 23; mean age, 51.3 years ┬▒ 14.6) who presented with undetermined abdominal lesions were included. CEUS and core needle percutaneous biopsy was performed under real-time CEUS guidance in all lesions. Data were recorded and compared with conventional ultrasound (US) guidance group (n = 75)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28127632/the-injection-jet-sign-an-innovative-method-of-needle-position-confirmation-during-ultrasound-guided-injections
#14
Judah Goldschmiedt, Chaitanya Shilagani, Himanshu Patel
Ultrasound (US)-guided therapeutic and diagnostic injections play an important role in day-to-day clinical practice for many radiologists. When compared with fluoroscopic or computed tomographic (CT) methods of localization, US offers the benefit of real-time confirmation of instrument position without exposing the patient to any ionizing radiation. Target delivery is usually confirmed by direct needle tip visualization and with real-time demonstration of capsular or bursal distention. While often more technically difficult in deeper anatomic spaces, larger patients and smaller delivery needles, US should still be considered the preferred method of image guidance because of these outlined benefits...
April 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28118951/brachyview-combining-ldr-seed-positions-with-transrectal-ultrasound-imaging-in-a-prostate-gel-phantom
#15
S Alnaghy, D L Cutajar, J A Bucci, K Enari, M Safavi-Naeini, M Favoino, M Tartaglia, F Carriero, J Jakubek, S Pospisil, M Lerch, A B Rosenfeld, M Petasecca
PURPOSE: BrachyView is a novel in-body imaging system which aims to provide LDR brachytherapy seeds position reconstruction within the prostate in real-time. The first prototype is presented in this study: the probe consists of a gamma camera featuring three single cone pinhole collimators embedded in a tungsten tube, above three, high resolution pixelated detectors (Timepix). METHODS: The prostate was imaged with a TRUS system using a sagittal crystal with a 2...
January 21, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28111644/3d-ultrasonic-needle-tracking-with-a-1-5d-transducer-array-for-guidance-of-fetal-interventions
#16
Wenfeng Xia, Simeon J West, Jean-Martial Mari, Sebastien Ourselin, Anna L David, Adrien E Desjardins
Ultrasound image guidance is widely used in minimally invasive procedures, including fetal surgery. In this context, maintaining visibility of medical devices is a significant challenge. Needles and catheters can readily deviate from the ultrasound imaging plane as they are inserted. When the medical device tips are not visible, they can damage critical structures, with potentially profound consequences including loss of pregnancy. In this study, we performed 3D ultrasonic tracking of a needle using a novel probe with a 1...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28111492/adaptive-kinematic-control-of-a-robotic-venipuncture-device-based-on-stereo-vision-ultrasound-and-force-guidance
#17
Max L Balter, Alvin I Chen, Timothy J Maguire, Martin L Yarmush
Robotic systems have slowly entered the realm of modern medicine; however, outside the operating room, medical robotics has yet to be translated to more routine interventions such as blood sampling or intravenous fluid delivery. In this paper, we present a medical robot that safely and rapidly cannulates peripheral blood vessels-a procedure commonly known as venipuncture. The device uses near-infrared and ultrasound imaging to scan and select suitable injection sites, and a 9-DOF robot to insert the needle into the center of the vessel based on image and force guidance...
February 2017: IEEE Transactions on Industrial Electronics
https://www.readbyqxmd.com/read/28104978/maximizing-the-endosonography-the-role-of-contrast-harmonics-elastography-and-confocal-endomicroscopy
#18
REVIEW
Andrada Seicean, Ofelia Mosteanu, Radu Seicean
New technologies in endoscopic ultrasound (EUS) evaluation have been developed because of the need to improve the EUS and EUS-fine needle aspiration (EUS-FNA) diagnostic rate. This paper reviews the principle, indications, main literature results, limitations and future expectations for each of the methods presented. Contrast-enhanced harmonic EUS uses a low mechanical index and highlights slow-flow vascularization. This technique is useful for differentiating solid and cystic pancreatic lesions and assessing biliary neoplasms, submucosal neoplasms and lymph nodes...
January 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28100998/a-man-with-pancreatic-head-mass-lesion-on-endoscopic-ultrasound-and-granuloma-on-cytopathology
#19
Neda Rad, Arash Heidarnezhad, Setareh Soheili, Amir Houshang Mohammad-Alizadeh, Arash Nikmanesh
Primary pancreatic lymphoma is an unlikely malignancy accounting for less than 0.5% of pancreatic tumors. Clinical presentation is often nonspecific and may be clinically misdiagnosed as pancreatic adenocarcinoma. Here we present an Iranian case of primary pancreatic lymphoma in a 47-year-old male suffering from jaundice and 20% weight loss. Endoscopic ultrasound revealed a mixed echoic mass lesion at the head of pancreas. The patient underwent endoscopic ultrasound-guided fine needle aspiration of solid pancreatic mass and histopathologic diagnosis revealed granuloma...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/28094482/real-time-ultrasound-guided-spinal-anesthesia-in-patients-with-predicted-difficult-anatomy
#20
Hesham Elsharkawy, Ankit Maheshwari, Rovnat Babazade, Anahi Perlas, Sherif Zaky, Loran M Soliman
BACKGROUND: There are limited reports of lumbar neuraxial blocks using real-time ultrasound in patients with predicted difficulties. We compared the number of attempts to perform spinal anesthesia using real time ultrasound guidance versus landmark technique in patients meeting predefined criteria for difficult spinal anesthesia. We also compared procedure time, block success, patient satisfaction and difficulty scores between groups. METHODS: Following institutional review board approval patients scheduled for total hip or knee arthroplasty with expected difficulty to perform spinal anesthesia were included...
January 17, 2017: Minerva Anestesiologica
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