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https://www.readbyqxmd.com/read/28211310/morphologic-and-doppler-findings-from-hepatic-ultrasonography-of-normal-cynomolgus-monkeys-macaca-fascicularis
#1
Kyo Won Lee Chan Woo Cho Ji Eun Lee Hyojun Park Gyu-Seong Choi Woo Kyoung Jeong Jae Berm Park And Sungjoo Kim
The present study evaluated the anatomic and ultrasonographic features of the liver in normal cynomolgus monkeys (Macacafascicularis). Healthy, male, cynomolgus monkeys from Cambodia (n = 25; mean age, 58.1 mo) were sedated with ketamine (7mg/kg) and examined by using 2D and Doppler ultrasonography. We measured the diameters of the vascular structures and bile duct, determined the velocities of the hepatic artery and portal vein, and calculated the resistance index of the hepatic artery. Vessel diameters were: proper hepatic artery, 1...
February 16, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28202441/effect-of-hypohydration-on-postsynaptic-cutaneous-vasodilation-and-sweating-in-healthy-men
#2
Matthew A Tucker, Ashley Six, Nicole E Moyen, Alf Z Satterfield, Matthew S Ganio
: Hypohydration decreases cutaneous vasodilation and sweating during heat stress, but it is unknown if these decrements are from postsynaptic (i.e. sweat gland/blood vessel) alterations. PURPOSE: To determine if hypohydration affects postsynaptic cutaneous vasodilation and sweating responses. METHODS: 12 healthy men participated in euhydrated (EU) and hypohydrated (HY) trials, with hypohydration induced via fluid restriction and passive heat-stress...
February 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28162211/-breast-conserving-surgery-with-immediate-partial-breast-reconstruction-using-pedicled-thoracodorsal-artery-perforator-flap-a-clinical-analysis-of-33-patients
#3
X Wang, Y J He, J F Li, Y T Xie, T F Wang, Z Q Fan, L Huo, T Ouyang
Objective: To explore the application value of pedicled thoracodorsal artery perforator flap in immediate partial breast reconstruction for breast cancer. Methods: This study is a prospective case series studies. Totally 128 cases of primary breast cancer patients who prepared to receive the breast-conserving surgery combine with immediate partial breast reconstruction of pedicled thoracodorsalartery perforator flap were enrolled in Breast Cancer Prevention and Treatment Center of Peking University Cancer Hospital from June 2013 to March 2016...
February 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28157745/diagnosis-and-management-of-transient-ischemic-attack
#4
Shelagh B Coutts
PURPOSE OF REVIEW: This article reviews the diagnosis, investigation, and recommended management after a transient ischemic attack (TIA) and discusses how to make an accurate diagnosis, including the diagnosis of mimics of TIAs. RECENT FINDINGS: Up to a 10% risk of recurrent stroke exists after a TIA, and up to 80% of this risk is preventable with urgent assessment and treatment. Imaging of the brain and intracranial and extracranial blood vessels using CT, CT angiography, carotid Doppler ultrasound, and MRI is an important part of the diagnostic assessment...
February 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28150225/altered-oscillation-of-doppler-derived-renal-and-renal-interlobar-venous-flow-velocities-in-hypertensive-and-diabetic-patients
#5
Yusuke Kudo, Taisei Mikami, Mutsumi Nishida, Kazunori Okada, Sanae Kaga, Nobuo Masauzi, Satomi Omotehara, Hitoshi Shibuya, Kaoru Kahata, Chikara Shimizu
BACKGROUND AND PURPOSE: Flow velocity oscillation rate (FVOR) of the renal interlobar vein has been reported to be decreased in patients with urinary obstruction or diabetic nephropathy, and increased in those with hypertension during pregnancy. To clarify the clinical role of the renal interlobar venous FVOR, we investigated the flow velocity patterns of the renal vessels in patients with hypertension (HT) and/or diabetes (DM). METHODS AND RESULTS: Pulsed-wave Doppler sonography was performed in 34 patients: 15 with HT, 10 with DM, and nine with both HT and DM (HT-DM)...
February 1, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28121624/destructive-effect-of-hifu-on-rabbit-embedded-endometrial-carcinoma-tissues-and-their-vascularities
#6
Liming Guan, Gang Xu
OBJECTIVES: To evaluate damage effect of High-intensity focused ultrasound on early stage endometrial cancer tissues and their vascularities. MATERIALS AND METHODS: Rabbit endometrial cancer models were established via tumor blocks implantation for a prospective control study. Ultrasonic ablation efficacy was evaluated by pathologic and imaging changes. The target lesions of experimental rabbits before and after ultrasonic ablation were observed after autopsy. The slides were used for hematoxylin-eosin staining, elastic fiber staining and endothelial cell staining; the slides were observed by optical microscopy...
January 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/28119289/synovial-features-of-patients-with-rheumatoid-arthritis-and-psoriatic-arthritis-in-clinical-and-ultrasound-remission-differ-under-anti-tnf-therapy-a-clue-to-interpret-different-chances-of-relapse-after-clinical-remission
#7
Stefano Alivernini, Barbara Tolusso, Luca Petricca, Laura Bui, Gabriele Di Sante, Giusy Peluso, Roberta Benvenuto, Anna Laura Fedele, Franco Federico, Gianfranco Ferraccioli, Elisa Gremese
OBJECTIVE: To define the synovial characteristics of patients with rheumatoid arthritis (RA) and psoriatic arthritis (PsA) in clinical and ultrasound remission achieved by combination therapy with methotrexate (MTX) and tumour necrosis factor (TNF) blockers. METHODS: Patients with RA in remission (n=25) (disease activity score (DAS)<1.6 for at least 6 months), patients with RA in low disease activity (LDA) (n=10) (1.6<DAS<2.4 for at least 6 months) and patients with PsA in remission (n=18) (DAS<1...
January 24, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28114163/doppler-ultrasonography-of-the-central-retinal-vessels-in-children-with-brain-death
#8
Becky J Riggs, Joanna S Cohen, Bhavana Shivakumar, Carmelina Trimboli-Heidler, Jason T Patregnani, Marijean M Miller, Michael C Spaeder, Nathan P Dean
OBJECTIVE: The purpose of this observational study is to explore if bedside Doppler ultrasonography of the central retinal vessels has the potential to become an ancillary study to support the timely diagnosis of brain death in children. DESIGN: Seventeen-month prospective observational cohort. SETTING: Forty-four bed pediatric medical and surgical ICU in an academic teaching hospital. PATIENTS: All children 0-18 years old who were clinically evaluated for brain death at Children's National Health Systems were enrolled and followed until discharge or death...
January 20, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28113622/investigation-of-crossbeam-multi-receiver-configurations-for-accurate-3d-vector-doppler-velocity-estimation
#9
Bushra Hussain, Billy Yiu, Alfred C H Yu, James C Lacefield, Tamie L Poepping
Accurate estimation of low blood velocities whose Doppler shifts span the wall filter cut-off, such as near the wall in recirculation or disturbed flow regions, is important for accurate mapping of velocities to achieve improved estimations of wall shear stress and turbulence, which are known risk factors for atherosclerosis and stroke. This study presents the comparative benefit of increasing the number of receiver beams above three for improved estimation of low 3D velocities. The 3D-crossbeam vector Doppler ultrasound configurations were studied in terms of the number of receiver beams, inter-beam angle, and beamselection method (criterion for discriminating between tissue and blood Doppler signals) for a range of velocity orientations, which may prove useful in the design of a future 2D array for vascular imaging...
August 24, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28111994/application-of-superb-micro-vascular-imaging-smi-in-obstetrics
#10
Junichi Hasegawa, Hikari Yamada, Eiko Kawasaki, Tomohiro Matsumoto, Shinobu Takahashi, Nao Suzuki
Superb Micro-vascular Imaging (SMI; Toshiba Medical Systems, Tokyo) is a new blood flow imaging technique that employs a unique algorithm to minimize motion artifacts by eliminating signals based on analysis of tissue movement. Compared to conventional blood flow imaging such as color and power Doppler imaging, SMI significantly reduces motion artifacts and can visualize low-velocity blood flow in small vessels. In the present report, the clinical value and future potential of SMI in obstetrics have been demonstrated for the first time...
January 23, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28109009/using-flow-characteristics-in-three-dimensional-power-doppler-ultrasound-imaging-to-predict-complete-responses-in-patients-undergoing-neoadjuvant-chemotherapy
#11
Wei-Chung Shia, Yu-Len Huang, Hwa-Koon Wu, Dar-Ren Chen
OBJECTIVES: Strategies are needed for the identification of a poor response to treatment and determination of appropriate chemotherapy strategies for patients in the early stages of neoadjuvant chemotherapy for breast cancer. We hypothesize that power Doppler ultrasound imaging can provide useful information on predicting response to neoadjuvant chemotherapy. METHODS: The solid directional flow of vessels in breast tumors was used as a marker of pathologic complete responses (pCR) in patients undergoing neoadjuvant chemotherapy...
January 21, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28104922/volumetric-doppler-angle-correction-for-ultrahigh-resolution-optical-coherence-doppler-tomography
#12
Jiang You, Ang Li, Congwu Du, Yingtian Pan
Ultrahigh-resolution optical coherence Doppler tomography (μODT) demonstrates great potential for quantitative blood flow imaging owing to its large field of view and capillary resolution. However, μODT only detects the axial flow velocity and requires Doppler angle correction to retrieve the absolute velocity. Although methods for Doppler angle tracking of single or few large vessels have been reported, a method that enables angle correction of the entire 3D microvascular networks remains a challenge. Here, we present a method based on eigenvalue analysis of 3D Hessian matrix to retrieve the orientation of each tubular vessel...
January 2, 2017: Applied Physics Letters
https://www.readbyqxmd.com/read/28090635/sonographic-features-and-diagnosis-of-peripheral-schwannomas
#13
Fan Yang, Xian-Xiang Chen, Huo-Lin Wu, Ji-Fa Zhu, Yuan Chen, Ling-Fang Yu, Xiao-Juan Huang
BACKGROUND: To determine the sonographic features of peripheral schwannomas. METHODS: This retrospective study included 54 cases of schwannoma in 51 patients. Ultrasonography (US) and MRI were performed in all patients. The US features of each tumor were analyzed and compared with pathologic findings. The US target sign was compared with the MRI findings. RESULTS: On US, 53 of the 54 schwannomas had a regular shape and clear margins, and one had an irregular shape...
January 16, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/28078826/the-impact-of-ph-inhomogeneities-on-cho-cell-physiology-and-fed-batch-process-performance-two-compartment-scale-down-modelling-and-intracellular-ph-excursion
#14
Matthias Brunner, Philipp Braun, Philipp Doppler, Christoph Posch, Dirk Behrens, Christoph Herwig, Jens Fricke
Due to high mixing times and base addition from top of the vessel, pH inhomogeneities are most likely to occur during large-scale mammalian processes. The goal of this study was to set-up a scale-down model of a 10-12 m(3) stirred tank bioreactor and to investigate the effect of pH perturbations on CHO cell physiology and process performance. Short-term changes in extracellular pH were hypothesized to affect intracellular pH and thus cell physiology. Therefore, batch fermentations, including pH shifts to 9...
January 12, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28076877/ultrasound-imaging-for-ovarian-and-deep-infiltrating-endometriosis
#15
Caterina Exacoustos, Errico Zupi, Emilio Piccione
The main challenges of imaging for endometriosis are the detection of nonovarian disease and the evaluation of the extension of the disease into pelvic structures. Transvaginal ultrasonography (TVS) has been proposed as the first-line imaging technique because it allows extensive exploration of the pelvis. The "typical" endometrioma is a unilocular cyst with homogeneous low-level echogenicity (ground glass echogenicity) of the cyst fluid. The use of color Doppler helps avoid classifying malignancies as endometriomas, defining the presence of vascular flow in papillations...
January 2017: Seminars in Reproductive Medicine
https://www.readbyqxmd.com/read/28050448/accuracy-of-pelvic-mass-score-in-pre-operative-determination-of-malignancy-in-adnexal-masses
#16
Lakshmi Mohan, Arun Rao, Sonali Ullal, Gowtham Krishna
INTRODUCTION: Suspicious adnexal masses are common clinical problems in gynaecological practice. A reliable diagnostic tool for the early detection of the ovarian malignancy is essential. AIM: To validate a new scoring system -Pelvic Mass Score (PMS) in predicting the nature of the adnexal mass pre-operatively. MATERIALS AND METHODS: A prospective observational study was carried out in 100 consenting women with an undiagnosed adnexal mass requiring operative intervention...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28043350/evaluation-of-changes-in-doppler-ultrasonography-indices-and-levels-of-maternal-serum-angiogenic-factors-throughout-pregnancy-in-ewes
#17
Özge Turna Yilmaz, Mehmet Can Gündüz, Gamze Evkuran Dal, Melih Uçmak, Zeynep Günay Uçmak, Esra Karaçam, Güven Kaşikçi, Mehmet Ragip Kiliçarslan
We evaluated the changes in the pulsatility index (PI) and resistance index (RI) of fetal and maternal vessels and maternal serum angiogenic factors throughout pregnancy in 20 Kivircik ewes. They were examined for pregnancy detection on Day 30 after mating. The PI and RI during the pregnancies were followed using Doppler ultrasonography (USG) of the uterine artery, umbilical artery, fetal aorta, and fetal vena cava. Doppler USG was performed every 15 days beginning from the 40th day after mating. Blood samples were collected every 15 days starting from the day of mating...
February 2017: Theriogenology
https://www.readbyqxmd.com/read/28038789/totally-implantable-wireless-ultrasonic-doppler-blood-flowmeters-toward-accurate-miniaturized-chronic-monitors
#18
REVIEW
Michael A Rothfuss, Jignesh V Unadkat, Michael L Gimbel, Marlin H Mickle, Ervin Sejdić
Totally implantable wireless ultrasonic blood flowmeters provide direct-access chronic vessel monitoring in hard-to-reach places without using wired bedside monitors or imaging equipment. Although wireless implantable Doppler devices are accurate for most applications, device size and implant lifetime remain vastly underdeveloped. We review past and current approaches to miniaturization and implant lifetime extension for wireless implantable Doppler devices and propose approaches to reduce device size and maximize implant lifetime for the next generation of devices...
December 27, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28032907/multiparametric-sonography-of-hematologic-malignancies-of-the-testis-grayscale-color-doppler-and-contrast-enhanced-ultrasound-and-strain-elastographic-appearances-with-histologic-correlation
#19
Carolina Kachramanoglou, Vasileios Rafailidis, Marianna Philippidou, Michele Bertolotto, Dean Y Huang, Annamaria Deganello, Maria E Sellars, Paul S Sidhu
Primary testicular lymphoma is rare and appears with nonspecific findings on grayscale and color Doppler sonography. We present 8 patients further examined with contrast-enhanced sonography, strain elastography, and histologic analysis after orchiectomy. Seven of 8 patients had a diagnosis of large B-cell lymphoma, and 1 of 8 had a diagnosis of granulocytic sarcoma, with solitary lesions (2 of 8), multiple lesions (3 of 8), or entire testicular involvement (3 of 8). Lesions appeared hypoechoic (7 of 8) or isoechoic (1 of 8), all with increased vascularity on color Doppler sonography and a nonbranching linear pattern of intratumoral vessels (7 of 8)...
December 29, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28031354/intra-arterial-nitroglycerin-as-directed-acute-treatment-in-experimental-ischemic-stroke
#20
Michael E Maniskas, Jill M Roberts, Rebecca Trueman, Annastazia E Learoyd, Amanda Gorman, Justin F Fraser, Gregory J Bix
BACKGROUND: Nitroglycerin (also known as glyceryl trinitrate (GTN)), a vasodilator best known for treatment of ischemic heart disease, has also been investigated for its potential therapeutic benefit in ischemic stroke. The completed Efficacy of Nitric Oxide in Stroke trial suggested that GTN has therapeutic benefit with acute (within 6 hours) transdermal systemic sustained release therapy. OBJECTIVE: To examine an alternative use of GTN as an acute therapy for ischemic stroke following successful recanalization...
December 28, 2016: Journal of Neurointerventional Surgery
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