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Doppler ultrasound

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https://www.readbyqxmd.com/read/28731492/factors-causing-loss-of-normal-doppler-waveform-of-the-left-internal-jugular-vein-evaluation-on-chest-computed-tomography
#1
Min Cheol Ku, Myung Gyu Song, Tae-Seok Seo, Eun Young Kang, Hwan Seok Yong, Jae Wook Lee
PURPOSE: To evaluate the presence and causes of left brachiocephalic vein (LBCV) steno-occlusive lesions in patients with loss of normal waveform in Doppler ultrasound of the left internal jugular vein (LIJV). MATERIALS AND METHODS: We performed Doppler ultrasound of both internal jugular veins in 1912 patients who received an implantable venous access port from August 2013 to January 2016. Among them, 106 patients showed loss of normal Doppler waveforms of the LIJV (56 men and 50 women; mean age, 61...
July 19, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28730844/correlation-between-uterine-artery-doppler-indices-and-menstrual-irregularities-among-levonorgestrel-releasing-intrauterine-system-and-depot-medroxyprogesterone-acetate-users-a-prospective-observational-study
#2
Mohamed Rezk, Alaa Al-Halaby, Mohamed Emarh, Mohamed Shawky
OBJECTIVE: To ascertain whether menstrual irregularities among users of levonorgestrel releasing intrauterine system (LNG-IUS) and depot medroxyprogesterone acetate (DMPA), were associated with changes in uterine artery Doppler indices or not. METHODS: This three-year prospective observational study included 102 women using LNG-IUS and 104 women using DMPA for contraception. Participants were followed at regular intervals over three years with performance of transvaginal ultrasound to measure uterine artery pulsatility index (PI) and resistance index (RI) before starting the method and at six months, 12 months, two and three years thereafter...
July 21, 2017: European Journal of Contraception & Reproductive Health Care
https://www.readbyqxmd.com/read/28730176/thrombectomy-combined-with-indwelling-catheter-thrombolysis-is-more-effective-than-pure-thrombectomy-for-the-treatment-of-lower-extremity-deep-venous-thrombosis
#3
Wenli Wang, Yanfang Wu, Tao Fang, Dunyuan Xu
This study was a retrospective analysis of the efficacy of thrombectomy plus local catheter-directed thrombolysis (CDT) for the treatment of lower extremity deep venous thrombosis (LDVT). The experimental group underwent thrombectomy plus LCDT, whereas the control group underwent thrombectomy plus systemic thrombolysis via the dorsalis pedis vein. Venography and vascular color Doppler ultrasound were performed 7 days after surgery and at follow-up. The differences in the thigh and calf circumferences of normal and affected limbs were compared between groups...
2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/28729408/femoral-artery-atherosclerosis-is-associated-with-physical-function-across-the-spectrum-of-the-ankle-brachial-index-the-san-diego-population-study
#4
Christina L Wassel, Alicia M Ellis, Natalie C Suder, Emma Barinas-Mitchell, Dena E Rifkin, Nketi I Forbang, Julie O Denenberg, Antoinette M Marasco, Belinda J McQuaide, Nancy S Jenny, Matthew A Allison, Joachim H Ix, Michael H Criqui
BACKGROUND: The ankle-brachial index (ABI) is inadequate to detect early-stage atherosclerotic disease, when interventions to prevent functional decline may be the most effective. We determined associations of femoral artery atherosclerosis with physical functioning, across the spectrum of the ABI, and within the normal ABI range. METHODS AND RESULTS: In 2007-2011, 1103 multiethnic men and women participated in the San Diego Population Study, and completed all components of the summary performance score...
July 20, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28728785/operative-strategies-to-reduce-cerebral-embolic-events-during-on-and-off-pump-coronary-artery-bypass-surgery-a-stratified-prospective-randomized-trial
#5
Michael E Halkos, Aaron Anderson, Jose Nilo G Binongo, Anthony Stringer, Yi Lasanajak, Vinod H Thourani, Omar M Lattouf, Robert A Guyton, Kim T Baio, Eric Sarin, William B Keeling, N Renee Cook, Katherine Carssow, Alexis Neill, Kathryn E Glas, John D Puskas
OBJECTIVE: To determine the impact of different aortic clamping strategies on the incidence of cerebral embolic events during coronary artery bypass grafting (CABG). METHODS: Between 2012 and 2015, 142 patients with low-grade aortic disease (epiaortic ultrasound grade I/II) undergoing primary isolated CABG were studied. Those undergoing off-pump CABG were randomized to a partial clamp (n = 36) or clampless facilitating device (CFD; n = 36) strategy. Those undergoing on-pump CABG were randomized to a single-clamp (n = 34) or double-clamp (n = 36) strategy...
June 16, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28728567/settings-and-artefacts-relevant-for-doppler-ultrasound-in-large-vessel-vasculitis
#6
REVIEW
L Terslev, A P Diamantopoulos, U Møller Døhn, W A Schmidt, S Torp-Pedersen
Ultrasound is used increasingly for diagnosing large vessel vasculitis (LVV). The application of Doppler in LVV is very different from in arthritic conditions. This paper aims to explain the most important Doppler parameters, including spectral Doppler, and how the settings differ from those used in arthritic conditions and provide recommendations for optimal adjustments. This is addressed through relevant Doppler physics, focusing, for example, on the Doppler shift equation and how angle correction ensures correctly displayed blood velocity...
July 20, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28727542/single-session-high-intensity-focused-ultrasound-treatment-for-persistent-or-relapsed-graves-disease-preliminary-experience-in-a-prospective-study
#7
Brian Hung-Hin Lang, Yu-Cho Woo, Ian Yat-Hin Wong, Keith Wan-Hang Chiu
Purpose To evaluate the safety and efficacy of ultrasonography (US)-guided high-intensity focused ultrasound (HIFU) ablation as a treatment for medically refractory Graves disease (GD). Materials and Methods After ethics approval, a prospective trial (NCT02685514) was performed from November 2015 to February 2016. Thirty patients underwent ablation of the entire right and left thyroid lobes, with areas near the tracheal-esophageal groove and common carotid artery left unablated. Serum thyroid-stimulating hormone (TSH), free T4 (FT4), antithyroid autoantibodies, and TSH receptor (TSHR) antibody levels were evaluated afterward, and US color Doppler, US volumetry, and eye assessment were performed...
July 20, 2017: Radiology
https://www.readbyqxmd.com/read/28726586/application-of-ureterorenoscope-and-flexible-ureterorenoscope-lithotripsy-in-removing-calculus-from-extracorporeal-living-donor-renal-graft-a-single-center-experience
#8
Chun-Hua Lin, Zuo-Fu Zhang, Jiahui Wang, Lu-Xin Yu, Wen-Ting Wang, Lei Shi, Xiang-Nan Lin
Here, we reported our clinical application of ureterorenoscope (URS) and flexible URS lithotripsy in stone removal on 10 cases of excised living donor kidney graft. After the extraction of donor kidney by retroperitoneal laparoscopy, the donor graft was perfused with 4 °C HCA solution. Calculus between 2-4 mm were removed intact with lithotomy forceps under direct vision of URS. Larger calculi of >4 mm were fractured with flexible URS combining holmium laser lithotripsy. Fragments of the calculus were extracted with basket extractor and lithotomy forceps...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28725614/a-review-of-varicocele-repair-for-pain
#9
REVIEW
Ryan C Owen, Benjamin J McCormick, Bradley D Figler, Robert M Coward
A dilation of the pampiniform venous plexus in the scrotum above the testicle, called a varicocele, affects approximately 15% of the general male population. While the majority is asymptomatic, pain results in up to 10% of cases of varicoceles. The pain associated with varicoceles is typically mild and is described as heavy, achy, or dull-and is usually isolated to the testicle or spermatic cord. Guidelines clearly recommend varicocele repair in males with varicoceles, infertility, and an abnormal semen analysis...
May 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28725494/apixaban-for-treatment-of-confirmed-heparin-induced-thrombocytopenia-a-case-report-and-review-of-literature
#10
Daniel E Ezekwudo, Rebecca Chacko, Bolanle Gbadamosi, Syeda Batool, Sussana Gaikazian, Theodore E Warkentin, Jo-Ann I Sheppard, Ishmael Jaiyesimi
BACKGROUND: Heparin-induced thrombocytopenia (HIT) is a life and limb-threatening condition caused by the binding of platelet-activating antibodies (IgG) to multimolecular platelet factor 4 (PF4)/heparin complexes because of heparin exposure. The by-product of this interaction is thrombin formation which substantially increases the risk of venous and/or arterial thromboembolism. Currently, only one anticoagulant, argatroban, is United States Food and Drug Administration-approved for management of HIT; however, this agent is expensive and can only be given by intravenous infusion...
2017: Experimental Hematology & Oncology
https://www.readbyqxmd.com/read/28723938/gender-differences-in-cerebral-metabolism-for-color-processing-in-mice-a-pet-mri-study
#11
Philip C Njemanze, Mathias Kranz, Mario Amend, Jens Hauser, Hans Wehrl, Peter Brust
INTRODUCTION: Color processing is a central component of mammalian vision. Gender-related differences of color processing revealed by non-invasive functional transcranial Doppler ultrasound suggested right hemisphere pattern for blue/yellow chromatic opponency by men, and a left hemisphere pattern by women. MATERIALS AND METHODS: The present study measured the accumulation of [18F]fluorodeoxyglucose ([18F]FDG) in mouse brain using small animal positron emission tomography and magnetic resonance imaging (PET/MRI) with statistical parametric mapping (SPM) during light stimulation with blue and yellow filters compared to darkness condition...
2017: PloS One
https://www.readbyqxmd.com/read/28723807/can-patients-with-femoral-neck-fracture-benefit-from-preoperative-thromboprophylaxis-a-prospective-randomized-controlled-trial
#12
Qiangqiang Li, Bingyang Dai, Jiacheng Xu, Yao Yao, Kai Song, Haojun Zhang, Dongyang Chen, Qing Jiang
BACKGROUND: The effectiveness of preoperative thromboprophylaxis remains obscure in patients with femoral neck fracture. The purpose of the current study was to investigate whether these patients benefit from preoperative thromboprophylaxis. METHODS: In this prospective, randomized controlled trial, a total of 80 patients with femoral neck fracture were randomly assigned to receive either rivaroxaban or conservative treatment before surgery. For all patients, color Doppler ultrasound of both lower extremities was performed immediately after admission...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28721810/centralized-and-local-color-doppler-ultrasound-reading-agreement-for-diagnosis-of-the-chronic-cerebrospinal-venous-insufficiency-in-patients-with-multiple-sclerosis
#13
Maria Grazia Caprio, Karen Marr, Sirin Gandhi, Dejan Jakimovski, Jesper Hagemeier, Bianca Weinstock-Guttman, Robert Zivadinov, Marcello Mancini
BACKGROUND: An impaired cerebrospinal venous drainage was postulated to be a cofactor in the multifactorial pathogenesis of multiple sclerosis (MS). Chronic cerebrospinal venous insufficiency (CCSVI) is characterized by abnormalities of the main extracranial cerebrospinal venous outflow routes, which can be detected by color Doppler Ultrasound (CDUS) using 5 venous hemodynamic (VH) criteria. Discrepant results between different investigators were reported in the past, therefore the usefulness and applicability of the CCSVI CDUS-based diagnosis in clinical research and practice has been questioned...
July 17, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28721179/early-and-late-onset-complications-of-gynaecologic-surgery-a-multimodality-imaging-approach
#14
REVIEW
I De Blasis, V Vinci, M E Sergi, F Capozza, M Saldari, F Moro, M C Moruzzi, A C Testa, L Manganaro
The role of imaging after surgery is pivotal to drive clinical management of early and/or late onset complications. Most frequently used imaging technique after pelvic surgery is Ultrasound (US), Magnetic Resonance Imaging (MRI) and Computed Tomography (CT). While Ultrasound is a standard procedure, using grey scale and/or colour Doppler evaluation, MRI and CT scan protocols should be derived on the basis of the specific indication of the exam. Correct evaluation of female pelvis after gynaecologic surgery, having in mind the most frequent complications, is based on the correct use of the instruments and on the experience of the examiner, who should be aware of the history of the patient, type of surgery and clinical symptoms for which the exam is required; the clinician should be aware of the possibilities and limits of the different techniques, in order to choose the most appropriate imaging modality and promptly make a correct diagnosis...
March 2017: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/28719480/a-rare-pediatric-case-of-posttraumatic-pseudoaneurysm-case-report-and-literature-review
#15
Ada Gu, April J Kam
Posttraumatic pseudoaneurysms are extremely rare in pediatric populations. In many cases, pseudoaneurysms may be confused with abscesses, epidermoid cysts, arteriovenous fistula, foreign objects, and ganglion cysts, as well as tumors. They are associated with distinguishing findings of "pulsatile mass, a palpable thrill, and an audible to-and-fro murmur" (1), which can be confirmed by various imaging techniques. In this report, we describe the case of a 4-year-old boy who presented to the pediatric emergency department 3 weeks after falling and subsequently getting cut by glass...
July 17, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28718893/association-between-maternal-vascular-murmur-and-the-small-for-gestational-age-fetus-with-abnormal-umbilical-artery-doppler-flow
#16
Diana Riknagel, Richard Farlie, Morten Hedegaard, Peter Humaidan, Johannes J Struijk
OBJECTIVE: To investigate the association between maternal vascular murmurs (MVMs) and fetal growth restriction (defined as small-for-gestational-age [SGA] fetus) and abnormal Doppler pulsatility index (PI) of the uterine and/or umbilical arteries. METHODS: A cross-sectional study of women aged 18 years or older with a singleton pregnancy at 28-34 weeks was conducted at Regional Hospital Viborg, Denmark, between May 1 and August 1, 2013. Ultrasound fetal biometry was performed and the Doppler PI of the umbilical and uterine arteries was determined...
July 18, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28717580/photoacoustic-ultrasound-dual-imaging-of-human-thyroid-cancers-an-initial-clinical-study
#17
Meng Yang, Lingyi Zhao, Xujin He, Na Su, ChenYang Zhao, Hewen Tang, Tao Hong, Wenbo Li, Fang Yang, Lin Lin, Bing Zhang, Rui Zhang, Yuxin Jiang, Changhui Li
We reported an initial clinical study of in vivo human thyroid by a photoacoustic/ultrasound handheld probe. Our dual-modality system is based on a high-end clinical ultrasound machine. Both healthy and cancerous thyroids were imaged non-invasively, and we compared the photoacoustic imaging with color Doppler ultrasound. The results of photoacoustic thyroid imaging could reveal many blood vessels that were not sensitive for Doppler ultrasound. Our study demonstrated that photoacoustic imaging could provide important complementary information for traditional ultrasound thyroid examination, which has a great potential for clinical diagnosis...
July 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28717121/impact-of-doppler-ultrasound-on-diagnosis-and-therapy-control-of-lienalis-steal-syndrome-after-liver-transplantation
#18
Eva M Teegen, Timm Denecke, Rosa B Schmuck, Robert Öllinger, Dominik Geisel, Johann Pratschke, Sascha S Chopra
BACKGROUND Lienalis steal syndrome is a rare complication after orthotopic liver transplantation leading to severe complications. Routine duplex sonography allows early and safe detection of lienalis steal syndrome and secondarily helps to monitor the outcome by evaluating the hemodynamics. MATERIAL AND METHODS This analysis included eight patients who after orthotopic liver transplantation needed splenic artery embolization due to lienalis steal syndrome. Lienalis steal syndrome was assumed in case of elevated transaminases, bilirubinemia or persistent ascites, and the absence of further pathologies...
July 18, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28715896/use-of-abdominal-ultrasound-in-the-diagnosis-of-hepatic-sinusoidal-obstruction-syndrome-sos-in-a-patient-receiving-a-hematopoietic-cell-transplant
#19
Marta Abadía Barnó, Eva Marín Serrano, Gloria Ruiz Fernández
The sinusoidal obstruction syndrome (SOS) is an uncommon form of portal hypertension that occurs in hematopoietic-cell transplant recipients who receive intense conditioning treatments. The diagnosis is clinical and it is usually delayed, because in these patients there are many causes that can damage the liver and can delay its detection. We present the case of a 47-year-old man, whose diagnosis was made with clinical and analytical data supported by ultrasound signs that showed hepatic congestion. After treatment with defibrotide the patient improved clinically and analytically...
July 18, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28715144/international-endometrial-tumor-analysis-ieta-terminology-in-women-with-postmenopausal-bleeding-and-sonographic-endometrial-thickness-%C3%A2-4-5%C3%A2-mm-an-agreement-and-reliability-study
#20
Povilas Sladkevicius, Arnaud Installé, Thierry Van den Bosch, Dirk Timmerman, Beryl Benacerraf, Ligita Jokubkiene, Alessia di Legge, Angelo Votino, Letizia Zannoni, Bart De Moor, Bavo De Cock, Ben Van Calster, Lil Valentin
OBJECTIVES: To estimate intra- and inter-rater agreement and reliability with regard to describing ultrasound images of the endometrium using the International Endometrial Tumor Analysis (IETA) terminology. METHODS: Four expert and four non-expert raters assessed video clips of transvaginal ultrasound examinations of the endometrium from 99 women with postmenopausal bleeding and sonographic endometrial thickness ≥4.5 mm and no fluid in the uterine cavity. The following features were rated: endometrial echogenicity (nine categories), endometrial midline (four categories), bright edge (yes, no), endometrial-myometrial junction (four categories), color score (1 to 4), vascular pattern (seven categories), irregularly branching vessels (yes, no), color splashes (yes, no)...
July 17, 2017: Ultrasound in Obstetrics & Gynecology
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