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Ultrasound radial

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https://www.readbyqxmd.com/read/29148586/a-dynamic-ultrasound-simulation-of-a-pulsating-three-layered-cca-for-validation-of-2d-wall-motion-and-blood-velocity-estimation-algorithms
#1
Xiao Hu, Yufeng Zhang, Guanghui Cai, Kexin Zhang, Li Deng, Lian Gao, Suya Han, Jianhua Chen
PURPOSE: A dynamic ultrasound simulation model for the common carotid artery (CCA) with three arterial layers for validation of 2D wall motion and blood velocity estimation algorithms is proposed in present study. This model describes layers with not only characteristics of echo distributions conforming to clinical ones, but also varying thicknesses, axial and radial displacements with pulsatile blood pressure during a cardiac cycle. METHODS: The modeling process is as follows: first, a geometrical model according with the clinical structure size of a CCA is built based on the preset layer thicknesses and the diameter of lumen...
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29148009/preoperative-ultrasound-for-runoff-venous-decompression-of-peripheral-nerves-for-arteriovenous-access-related-pain-in-the-upper-limb
#2
Hiroaki Matsuda, Yoshinari Oka, Ryuichi Yoshida, Yuki Katsura, Hidemi Takeuchi, Yasuo Fujimoto, Shigeko Takatsu, Masashi Miyazaki
INTRODUCTION: Arteriovenous access (AVA)-related pain treated successfully with runoff-venous decompression of the causative nerve, following ultrasound (US)-assisted preoperative evaluation, has never been reported. CASE PRESENTATION: A 57-year-old man suffering from constant exhausting pains along the outflow cephalic vein of the radiocephalic arteriovenous fistula at the wrist and the antecubital fossa, was treated surgically after the diagnosis of AVA-related pain derived from cephalic vein compression on two peripheral cutaneous nerves, the superficial radial nerve (SRN) and the lateral antebrachial cutaneous nerve (LACN)...
November 9, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/29139101/-endobronchial-ultrasound-ebus-an-update-2017
#3
K Darwiche, F Özkan, C Wolters, S Eisenmann
Endobronchial Ultrasound (EBUS) with the two modalities curved and radial EBUS significantly improved the diagnostics in several pulmonary diseases. The examination and staging of mediastinal and hilar lymph nodes in patients with known or suspected lung malignancy as well as the evaluation of unknown pulmonary or mediastinal lesions can be achieved with minimal invasive means when using EBUS. More invasive surgical procedures for diagnostic purposes can be omitted. The diagnostic yield also increases when EBUS is applied in sarcoidosis or mediastinal lymph node tuberculosis but only to some extend in case of lymphoma...
November 2017: Pneumologie
https://www.readbyqxmd.com/read/29136193/early-first-trimester-uteroplacental-flow-and-the-progressive-disintegration-of-spiral-artery-plugs-new-insights-from-contrast-enhanced-ultrasound-and-tissue-histopathology
#4
V H J Roberts, T K Morgan, P Bednarek, M Morita, G J Burton, J O Lo, A E Frias
STUDY QUESTION: Does the use of a vascular contrast agent facilitate earlier detection of maternal flow to the placental intervillous space (IVS) in the first trimester of pregnancy? SUMMARY ANSWER: Microvascular filling of the IVS was demonstrated by contrast-enhanced ultrasound from 6 weeks of gestation onwards, earlier than previously believed. WHAT IS KNOWN ALREADY: During placental establishment and remodeling of maternal spiral arteries, endovascular trophoblast cells invade and accumulate in the lumen of these vessels to form 'trophoblast plugs'...
November 10, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29135593/ultrasound-guided-dynamic-needle-tip-positioning-technique-versus-palpation-technique-for-radial-arterial-cannulation-in-adult-surgical-patients-a-randomized-controlled-trial
#5
Roy K Kiberenge, Kenichi Ueda, Brett Rosauer
BACKGROUND: Radial arterial cannulation is most commonly done using palpation, but the use of ultrasound has increased the cannulation success rate. This improvement, albeit significant, has not led to a very high success rate especially in trainees. A modified ultrasound technique for vascular cannulation (dynamic needle tip positioning) has been described for peripheral venous cannulation. We therefore assessed the success rate of this technique compared to the palpation technique for radial artery cannulation in adult surgical patients...
November 10, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29131513/role-of-vascular-ultrasound-scanning-in-repeated-trans-radial-coronary-artery-intervention-prospective-randomized-study
#6
Mahmoud Farouk Elmahdy, Mohamed Hassan, Ahmed Elguindy
OBJECTIVES: We aimed to detect if pre-procedure vascular ultrasound scanning (VUS) of radial arteries (RAs) can increase the radial access success (RAS) rate and/or reduce the vascular access time (VAT), by guiding the choice of the proper access site for repeated trans-radial interventions (TRIs). BACKGROUND: Currently, repeated-TRIs are encountered more frequently in most of the cath. labs. However, structural changes of the RAs after TRA may hinder it is usage for repeated-TRI...
November 13, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29122375/blunt-traumatic-axillary-artery-truncation-in-the-absence-of-associated-fracture
#7
Emily Bokser, William Caputo, Barry Hahn, Josh Greenstein
BACKGROUND: Axillary artery injuries can be associated with both proximal humeral fractures (Naouli et al., 2016; Ng et al., 2016) [1,2] as well as shoulder dislocations (Leclerc et al., 2017; Karnes et al., 2016) [3,4]. We report a rare case of an isolated axillary artery truncation following blunt trauma without any associated fracture or dislocation. CASE REPORT: A 58-year-old male presented to the emergency department for evaluation after falling on his outstretched right arm...
October 7, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29054959/honeycomb-and-necklace-signs-in-liver-abscesses-secondary-to-melioidosis
#8
Sidney Ching Liang Ong, Mina Mustafa Mahmood Alemam, Nor Aniza Zakaria, Nur Azidawati Abdul Halim
Melioidosis is endemic in Southeast Asia and tropical Australia with varying clinical features from benign skin lesions to fatal septicaemia. Imaging plays an important role in evaluation of the melioid liver abscesses. A 45-year-old man with underlying diabetes presented with fever and lethargy for 2 weeks and abdominal pain for 2 days. His liver was enlarged on examination. Blood investigations revealed mild leucocytosis and raised liver enzymes. Ultrasound showed multiple multiloculated hypoechoic lesions throughout the liver and spleen...
October 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29053103/ultrasound-functional-imaging-in-an-i-ex-vivo-i-beating-porcine-heart-platform
#9
Niels J Petterson, Louis S Fixsen, Marcel C M Rutten, Nico H J Pijls, Frans N van de Vosse, Richard G P Lopata
In recent years, novel ultrasound functional imaging (UFI) techniques have been introduced to assess cardiac function by measuring, e.g., cardiac output (CO) and/or myocardial strain. Verification and reproducibility assessment in a realistic setting remain major issues. Simulations and phantoms are often unrealistic, whereas in vivo measurements often lack crucial hemodynamic parameters or ground truth data, or suffer from the large physiological and clinical variation between patients when attempting clinical validation...
October 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29041924/the-value-of-repeat-radial-probe-endobronchial-ultrasound-guided-transbronchial-biopsy-after-initial-non-diagnostic-results-in-patients-with-peripheral-pulmonary-lesions
#10
Chun-Ta Huang, Yi-Ju Tsai, Chao-Chi Ho, Chong-Jen Yu
BACKGROUND: Radial-probe endobronchial ultrasound (rEBUS)-guided transbronchial biopsy (TBB) is invaluable in the diagnosis of peripheral pulmonary lesions (PPLs); however, in certain instances, the procedure has to be repeated because of initial non-diagnostic procedure(s). Little if any literature has been published on this issue. Therefore, the aim of this study was to investigate the utility of repeat rEBUS-guided TBB in achieving a definitive diagnosis of PPLs. METHODS: All patients who underwent rEBUS-guided TBB of PPLs at National Taiwan University Hospital between 2011 and 2015 and had a repeat procedure after non-diagnostic initial procedures were identified as the study subjects...
October 17, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29035844/comparison-of-radial-access-guided-femoral-access-and-non-guided-femoral-access-among-women-undergoing-percutaneous-coronary-intervention
#11
Linda M Koshy, Laura H Aberle, Mitchell W Krucoff, Connie N Hess, Ernest Mazzaferri, Sanjit S Jolly, Alice Jacobs, C Michael Gibson, Roxana Mehran, Ian C Gilchrist, Sunil V Rao
OBJECTIVES: This study was conducted to determine the association between radial access, guided femoral access, and non-guided femoral access on postprocedural bleeding and vascular complications after percutaneous coronary intervention (PCI). BACKGROUND: Bleeding events and major vascular complications after PCI are associated with increased morbidity, mortality, and cost. While the radial approach has been shown to be superior to the femoral approach in reducing bleeding and vascular complications, whether the use of micropuncture, fluoroscopy, or ultrasound mitigates these differences is unknown...
October 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28989555/noninvasive-evaluation-of-varying-pulse-pressures-in-vivo-using-brachial-sphymomanometry-applanation-tonometry-and-pulse-wave-ultrasound-manometry
#12
Ronny X Li, Ada Ip, Elena Sanz-Miralles, Elisa E Konofagou
The routine assessment and monitoring of hypertension may benefit from the evaluation of arterial pulse pressure (PP) at more central locations (e.g. the aorta) rather solely at the brachial artery. Pulse Wave Ultrasound Manometry (PWUM) was previously developed by our group to provide direct, noninvasive aortic PP measurements using ultrasound elasticity imaging. Using PWUM, radial applanation tonometry, and brachial sphygmomanometry, this study investigated the feasibility of noninvasively obtaining direct PP measurements at multiple arterial locations in normotensive, pre-hypertensive, and hypertensive human subjects...
June 2017: Artery Research
https://www.readbyqxmd.com/read/28981150/nerve-ultrasound-reliability-of-upper-limbs-effects-of-examiner-training
#13
Rocio C Garcia-Santibanez, Alexander R Dietz, Robert C Bucelli, Craig M Zaidman
INTRODUCTION: Duration of training to reliably measure nerve cross-sectional area (CSA) using ultrasound is unknown. METHODS: A retrospective review was performed of ultrasound data acquired and recorded by two examiners. - an expert and a trainee with two (novice) or twelve (experienced) months of experience. Data on median, ulnar, and radial nerves was reviewed for 42 patients. RESULTS: Inter-rater reliability was good and varied most with nerve site but little with experience...
October 5, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28970996/ultrasound-assisted-posteromedial-portal-placement-of-the-elbow-joint-to-prevent-ulnar-nerve-injury
#14
Hiroshi Ohuchi, Rolando Junior L Torres, Kotaro Shinga, Ken Ichikawa, Yuki Kato, Soichi Hattori, Shin Yamada
Direct posterior and posterolateral portals are the standard portals used in posterior elbow arthroscopy. A posteromedial portal in the elbow is not recommended because of its proximity to the ulnar nerve. However, iatrogenic injuries to the ulnar nerve have been reported after elbow arthroscopy using the standard posterior portals, especially in posteromedial elbow joint pathologies. We present a surgical technique applicable to posteromedial elbow pathology by using ultrasound-assisted posteromedial portal placement of the elbow joint...
August 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28953488/iatrogenic-transection-of-an-arterial-cannula-and-the-successful-use-of-ultrasound-to-locate-the-retained-intraarterial-fragment-a-case-report
#15
Andrew C Leatherbarrow, Alina Bucata
We report a rare case of iatrogenic arterial cannula transection during a dressing change and migration of the distal fragment within the radial artery. The retained intraarterial fragment was successfully located using ultrasound, enabling swift surgical removal. We discuss the risk factors associated with arterial cannula transection and the efficacy of imaging modalities in locating the intraarterial fragment.
September 26, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28942118/carpal-tunnel-syndrome-effectiveness-of-physical-therapy-and-electrophysical-modalities-an-updated-systematic-review-of-randomized-controlled-trials
#16
REVIEW
Bionka M A Huisstede, Peter Hoogvliet, Thierry P C Franke, Manon S Randsdorp, Bart W Koes
OBJECTIVE: To review scientific literature studying the effectiveness of physical therapy and electrophysical modalities for carpal tunnel syndrome (CTS). DATA SOURCES: The Cochrane Library, PubMed, EMBASE, CINAHL, and PEDro. STUDY SELECTION: Two reviewers independently applied the inclusion criteria to select potential eligible studies. DATA EXTRACTION: Two reviewers independently extracted the data and assessed the methodological quality using the Cochrane Risk of Bias Tool...
September 20, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28934784/sonographic-guidance-for-supraclavicular-brachial-plexus-blocks-single-vs-double-injection-cluster-approach
#17
Jung Ju Choi, Hyun Jeong Kwak, Wol Seon Jung, Seung Hyun Chung, Mi Geum Lee
BACKGROUND: The cluster approach for supraclavicular brachial plexus block (SC-BPB) can be easily performed but may result in asymmetric local anesthetic (LA) spread. The authors hypothesized that the use of a cluster approach in each of the 2 planes would achieve better 3-dimensional LA distribution than the traditional single cluster approach. OBJECTIVES: The purpose of the present study was to compare a double injection (DI) in 2 planes (one injection in each plane) with the traditional single injection (SI) cluster approach for ultrasound-guided SC-BPB...
September 2017: Pain Physician
https://www.readbyqxmd.com/read/28923695/the-effect-of-pre-procedure-sublingual-nitroglycerin-on-radial-artery-diameter-and-allen-s-test-outcome-relevance-to-transradial-catheterization
#18
Aun-Yeong Chong, Ted Lo, Sudhakar George, Karim Ratib, Mamas Mamas, James Nolan
BACKGROUND: The radial artery is increasingly used for cardiac procedures, but is a relatively small vessel that is prone to spasm when instrumented. Intra-arterial nitroglycerine has been shown to reduce radial spasm but first requires arterial access. We investigated the effect of pre-procedure sublingual nitroglycerin (NTG) on the diameter of the radial artery in a large cohort of patients. METHODS: 305 subjects underwent ultrasound measurement of their radial and ulnar arteries in both arms before and after the administration of 800μg of sublingual NTG...
July 29, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28912005/proximal-radial-artery-arteriovenous-fistula-for-hemodialysis-vascular-access
#19
William C Jennings, Alexandros Mallios, Nasir Mushtaq
OBJECTIVE: This study reviewed our experience with proximal radial artery-based arteriovenous fistulas (PRA-AVFs) for hemodialysis vascular access, evaluating characteristics of the patients, functional patency, risk of steal syndrome, survival of the patient, and technical considerations. METHODS: We retrospectively analyzed our database of consecutive patients, identifying those individuals with a PRA-AVF created during a 12-year period. In addition to physical examination, all patients underwent ultrasound vessel mapping by the operating surgeon, identifying the PRA-AVF configuration and outflow target most likely to succeed...
September 11, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28910426/optical-coherence-tomography-angiography-features-of-iris-racemose-hemangioma-in-4-cases
#20
Jason L Chien, Kareem Sioufi, Sandor Ferenczy, Emil Anthony T Say, Carol L Shields
Importance: Optical coherence tomography angiography (OCTA) allows visualization of iris racemose hemangioma course and its relation to the normal iris microvasculature. Objective: To describe OCTA features of iris racemose hemangioma. Design, Setting, and Participants: Descriptive, noncomparative case series at a tertiary referral center (Ocular Oncology Service of Wills Eye Hospital). Patients diagnosed with unilateral iris racemose hemangioma were included in the study...
October 1, 2017: JAMA Ophthalmology
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