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https://www.readbyqxmd.com/read/28324997/assessing-the-development-of-fetal-myocardial-function-by-a-novel-doppler-myocardial-performance-index
#1
Ahsan H Khandoker, F Marzbanrad, Y Kimura, Saeed Al Nuaimi, M Palaniswami
Doppler-derived myocardial performance index are used to assess aspects of systolic and diastolic function in adult as well as fetal heart. The Tei Index (TI) is a useful and non-invasive tool. The aim of this study was to determine normal values of fetal left ventricular (LV) TI in early (16-32 weeks) and late trimester (35-41 weeks) fetuses and to develop a new myocardial performance index (K-index; KI) which focuses on fetal diastolic interval when oxygenated blood from the placenta filled in the LV. Simultaneous recordings of Doppler Ultrasound Signal (DUS) of the LV outflow tracts and fetal electrocardiogram signals were obtained in 55 early- and late-trimester fetuses...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324903/instrumental-assessment-of-pediatric-dysphagia
#2
Joan C Arvedson, Maureen A Lefton-Greif
Speech-language pathologists (SLPs) have fulfilled primary roles in the evaluation and management of children with feeding/swallowing disorders for more than five decades. The increased incidence and prevalence of newborns, infants, and children with feeding and swallowing disorders has resulted in increased use of instrumental swallowing evaluations. The videofluoroscopic swallow study and fiberoptic endoscopic evaluation of swallowing are the two most commonly used swallowing assessments by SLPs, with ultrasound used less frequently...
April 2017: Seminars in Speech and Language
https://www.readbyqxmd.com/read/28323667/central-venous-access-in-children-indications-devices-and-risks
#3
Guillermo Ares, Catherine J Hunter
PURPOSE OF REVIEW: Central venous catheters (CVCs) have a prominent role in the diagnostic and therapy of neonates and children. Herein, we describe the multiple indications for CVC use and the different devices available for central venous access. Given the prevalent use of CVCs, healthcare systems are focused on reducing complications from their use, particularly central line-associated bloodstream infections (CLABSIs). The most up-to-date information available sheds light on best practices and future areas of investigation...
March 18, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28323638/fast-lesion-mapping-during-hifu-treatment-using-harmonic-motion-imaging-guided-focused-ultrasound-hmigfus-in-vitro-and-in-vivo
#4
Yang Han, Shutao Wang, Thomas Payen, Elisa Konofagou
The successful clinical application of high intensity focused ultrasound (HIFU) ablation depends on reliable monitoring of the lesion formation. Harmonic motion imaging guided focused ultrasound (HMIgFUS) is an ultrasound-based elasticity imaging technique, which monitors HIFU ablation based on the stiffness change of the tissue instead of the echo intensity change in conventional B-mode monitoring, rendering it potentially more sensitive to lesion development. Our group has shown that predicting the lesion location based on the radiation force-excited region is feasible during HMIgFUS...
March 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28319427/new-horizons-in-the-imaging-of-perianal-crohn-s-disease-transperineal-ultrasonography
#5
Cristina Bezzio, Robert V Bryant, Gianpiero Manes, Giovanni Maconi, Simone Saibeni
Perianal disease, most commonly manifest as fistula or abscess formation, affects up to 40% of patients with Crohn's disease. Perianal Crohn's disease is disabling, associated with poor outcomes, and represents a therapeutic challenge for physicians. Correct diagnosis and classification of perianal disease is the first crucial step for appropriate multidisciplinary management. Areas covered: A literature search was performed of the PubMed database using the terms "transperineal ultrasonography", "transperineal ultrasound", "perianal disease", "perianal fistula", "perianal abscess", "magnetic resonance", "endoanal ultrasonography", "endoscopic ultrasound" in combination with "Crohn's disease"...
March 20, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28318887/multi-focus-beamforming-for-thermal-strain-imaging-using-a-single-ultrasound-linear-array-transducer
#6
Man M Nguyen, Xuan Ding, Steven A Leers, Kang Kim
Ultrasound-induced thermal strain imaging (TSI) has been used successfully to identify lipid- and water-based tissues in atherosclerotic plaques in some research settings. However, TSI faces several challenges to be realized in clinics. These challenges include motion artifacts and displacement tracking accuracy, as well as limited heating capability, which contributes to low thermal strain signal-to-noise ratio, and a limited field of view. Our goal was to address the challenge in heating tissue in TSI. Current TSI systems use separate heating and imaging transducers, which require physical alignment of the heating and imaging beams and result in a bulky setup that limits in vivo operation...
March 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28317249/getting-back-to-the-dissecting-room-an-evaluation-of-an-innovative-course-in-musculoskeletal-anatomy-for-uk-based-rheumatology-training
#7
Tim Blake, Debbi Marais, Andrew B Hassell, Kay Stevenson, Zoe Paskins
BACKGROUND: The rheumatologist relies heavily on clinical skills to diagnose diverse conditions, something that is correlated with one's knowledge of clinical anatomy. More recently, rheumatology has offered further career flexibility with opportunities to develop skills such as joint injection and musculoskeletal (MSK) ultrasound, both of which require a sound understanding of anatomy. Currently, there are no formal strategies to support competency-based anatomy learning in rheumatology in the UK...
March 20, 2017: Musculoskeletal Care
https://www.readbyqxmd.com/read/28317208/current-status-of-interventional-endoscopic-ultrasound
#8
REVIEW
Shomei Ryozawa, Naotaka Fujita, Atsushi Irisawa, Yoshiki Hirooka, Tetsuya Mine
Endoscopic ultrasound (EUS) is being used increasingly in the management of pancreatic fluid collection, biliary and pancreatic duct drainage in cases of failed endoscopic retrograde cholangiopancreatography, drainage of the gallbladder, and other conditions. The role of interventional EUS is rapidly expanding and new interventions are continuously emerging. The development of devices could be a major breakthrough in the field of interventional EUS. New devices would enable the expansion of its role even further and prompt its widespread use in clinical practice...
March 20, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28317125/referenceless-magnetic-resonance-temperature-imaging-using-gaussian-process-modeling
#9
Joshua P Yung, David Fuentes, Christopher J MacLellan, Florian Maier, Yannis Liapis, John D Hazle, R Jason Stafford
PURPOSE: During magnetic resonance (MR)-guided thermal therapies, water proton resonance frequency shift (PRFS) based MR temperature imaging can quantitatively monitor tissue temperature changes. It is widely known that the PRFS technique is easily perturbed by tissue motion, tissue susceptibility changes, magnetic field drift, and modality-dependent applicator induced artifacts. Here a referenceless Gaussian process modeling (GPM) based estimation of the PRFS is investigated as a methodology to mitigate unwanted background field changes...
March 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28315030/endoscopic-management-of-pancreatic-cysts
#10
REVIEW
Michael J Bartel, Massimo Raimondo
Management of pancreatic cystic lesions relies on patients' clinical presentation, imaging, and endoscopic ultrasound. Current research in basic science, radiology, and endoscopy is evolving and making progress in this condition which is relatively common in the general population. This review focuses on the recent endoscopic ultrasound approaches to the diagnosis of these pancreatic disorders.
March 17, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28314431/fast-analysis-of-phthalates-in-freeze-dried-baby-foods-by-ultrasound-vortex-assisted-liquid-liquid-microextraction-coupled-with-gas-chromatography-ion-trap-mass-spectrometry
#11
Mario Vincenzo Russo, Pasquale Avino, Ivan Notardonato
This paper is focused on the determination of phthalates (PAEs), compounds "plausibly" endocrine disruptors, in baby food products by means of a method based on ultrasound-vortex-assisted liquid-liquid microextraction coupled with GC-IT/MS (UVALLME-GC-IT/MS). Particularly, the whole procedure allows the determination of six phthalates such as DMP, DEP, DBP, iBcEP, BBP and DEHP. After dissolution of 0.1g product sample and addition of anthracene as Internal Standard, 250μL of n-heptane are used as extraction solvent...
November 25, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28301716/prenatal-screening-it-is-not-just-about-down-syndrome
#12
Mary E Norton
Currently available prenatal genetic testing options include a bewildering array of tests from which patients, providers, insurers, and various health systems have to select. In many cases, patients or providers undergo or recommend multiple screening tests focused on the same conditions, for fear of missing something, even if the chance of that is very small. In the commentary in this issue of BJOG by Alfirevic and colleagues (Alfirevic Z, et al. BJOG In Press), the authors opine on the relationship between cell free DNA screening (cfDNA) and first trimester anatomy ultrasound...
March 16, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28301597/boiling-histotripsy-lesion-characterization-on-a-clinical-magnetic-resonance-imaging-guided-high-intensity-focused-ultrasound-system
#13
Avinash Eranki, Navid Farr, Ari Partanen, Karun V Sharma, Hong Chen, Christopher T Rossi, Satya V V N Kothapalli, Matthew Oetgen, AeRang Kim, Ayele H Negussie, David Woods, Bradford J Wood, Peter C W Kim, Pavel S Yarmolenko
PURPOSE: High intensity focused ultrasound (HIFU) is a non-invasive therapeutic technique that can thermally ablate tumors. Boiling histotripsy (BH) is a HIFU approach that can emulsify tissue in a few milliseconds. Lesion volume and temperature effects for different BH sonication parameters are currently not well characterized. In this work, lesion volume, temperature distribution, and area of lethal thermal dose were characterized for varying BH sonication parameters in tissue-mimicking phantoms (TMP) and demonstrated in ex vivo tissues...
2017: PloS One
https://www.readbyqxmd.com/read/28300033/-current-status-of-extracorporeal-shock-wave-lithotripsy-in-urinary-lithiasis
#14
Jose Gregorio Pereira-Arias, Mikel Gamarra-Quintanilla, Luis Felipe Urdaneta-Salegui, Jorge Alberto Mora-Christian, Andrea Sánchez-Vazquez, Ander Astobieta-Odriozola, Gaspar Ibarluzea-González
Over the last decade, urinary lithiasis' prevalence has dramatically increased due to diet and lifestyle changes, growing 10.6% and 7.1% in men and women respectively. Extracorporeal shock wave lithotripsy has lost relevance in current practice due to endoscopic device development and unpredictability of results. Instrument miniaturization is leading to an increase of the percutaneous approach of increasingly smaller stones, while most flexible ureteroscopes durability and digitalization has allowed urologists to address larger stones...
March 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28298940/image-guided-thermal-ablation-of-benign-thyroid-nodules
#15
Anna Pisani Mainini, Cristian Monaco, Lorenzo Carlo Pescatori, Chiara De Angelis, Francesco Sardanelli, Luca Maria Sconfienza, Giovanni Mauri
Benign thyroid nodules are a common disease in the general population. Most often, they are completely asymptomatic and discovered occasionally during routine ultrasound examinations, and do not require any treatment. When thyroid nodules become symptomatic, surgical excision is still considered standard treatment. In the last few years, several experiences in the treatment of benign thyroid nodules through image-guided percutaneous thermal ablation have been reported with encouraging results, so that currently, these treatments are often proposed as first-choice options for patients with symptomatic benign thyroid nodules...
March 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28298022/magnetic-resonance-guided-focused-ultrasound-thalamotomy-for-tremor-a-report-of-30-parkinson-s-disease-and-essential-tremor-cases
#16
Menashe Zaaroor, Alon Sinai, Dorith Goldsher, Ayelet Eran, Maria Nassar, Ilana Schlesinger
OBJECTIVE Thalamotomy of the ventral intermediate nucleus (VIM) is effective in alleviating medication-resistant tremor in patients with essential tremor (ET) and Parkinson's disease (PD). MR-guided focused ultrasound (MRgFUS) is an innovative technology that enables noninvasive thalamotomy via thermal ablation. METHODS Patients with severe medication-resistant tremor underwent unilateral VIM thalamotomy using MRgFUS. Effects on tremor were evaluated using the Clinical Rating Scale for Tremor (CRST) in patients with ET and by the motor part of the Unified Parkinson's Disease Rating Scale (UPDRS) in patients with PD and ET-PD (defined as patients with ET who developed PD many years later)...
February 24, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28297832/-effects-of-high-intensity-focused-ultrasound-on-apoptosis-associated-gene-expression-in-xenografts-with-human-pancreatic-cancer
#17
L L Hong, Z Guo, W G Xing, H P Yu, C F Liu, X L Yang, H L Wang
Objective: To identify the expression of apoptosis-associated genes of high- intensity focused ultrasound(HIFU) in xenograft with human pancreatic cancer. Methods: Mice implated with human pancreatic cancer cells (YY-1) were divided into HIFU group or control group. Tumor cell apoptosis was verified by TUNEL. The expression of the apoptosis-associated genes was analyzed by Agilent Human Gene Expression. Selected genes was validated by quantitative real-time PCR(RT-PCR)and Western blot. Results: The rate of tumor cell apoptosis in HIFU group was higher than that of control group at 7, 14 days after HIFU treatment ((63...
March 7, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28296143/targeting-the-safe-zone
#18
Andrea Mignatti, Patricia Friedmann, David Paul Slovut
OBJECTIVE: The aim of this study was to assess the effectiveness of a quality improvement (QI) program in reducing vascular complications during cardiac catheterization. BACKGROUND: Vascular access complications during cardiac catheterization are associated with higher morbidity and mortality. We implemented a QI program focused on using micropuncture techniques and targeting the "safe zone," an area below the inferior border of the inferior epigastric artery and above the inferior border of the femoral head, for femoral artery puncture...
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28293194/quantification-of-internal-stress-strain-fields-in-human-tendon-unraveling-the-mechanisms-that-underlie-regional-tendon-adaptations-and-mal-adaptations-to-mechanical-loading-and-the-effectiveness-of-therapeutic-eccentric-exercise
#19
REVIEW
Constantinos N Maganaris, Panagiotis Chatzistergos, Neil D Reeves, Marco V Narici
By virtue of their anatomical location between muscles and bones, tendons make it possible to transform contractile force to joint rotation and locomotion. However, tendons do not behave as rigid links, but exhibit viscoelastic tensile properties, thereby affecting the length and contractile force in the in-series muscle, but also storing and releasing elastic stain energy as some tendons are stretched and recoiled in a cyclic manner during locomotion. In the late 90s, advancements were made in the application of ultrasound scanning that allowed quantifying the tensile deformability and mechanical properties of human tendons in vivo...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28292493/patient-preferences-for-minimally-invasive-and-open-locoregional-treatment-for-early-stage-breast-cancer
#20
Floortje M Knuttel, Maurice A A J van den Bosch, Danny A Young-Afat, Marleen J Emaus, Desirée H J G van den Bongard, Arjen J Witkamp, Helena M Verkooijen
BACKGROUND: Noninvasive or minimally invasive treatments are being developed as alternatives to surgery for patients with early-stage breast cancer. Patients' preferences with regard to these new treatments have not been investigated. OBJECTIVES: To assess preferences of patients with breast cancer and of healthy women regarding these new techniques, compared with conventional surgical treatments. METHODS: Six hypothetical breast cancer treatment-outcome scenarios were developed: three standard surgical scenarios (mastectomy, mastectomy with immediate implant-based reconstruction, and breast-conserving therapy [BCT]) and three minimally invasive or noninvasive scenarios (radiofrequency ablation, magnetic resonance-guided high-intensity focused ultrasound ablation, and single-dose ablative radiotherapy)...
March 2017: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
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