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https://www.readbyqxmd.com/read/29045733/effect-of-first-cannulation-time-and-dialysis-machine-blood-flows-on-survival-of-arteriovenous-fistulas
#1
Teun Wilmink, Sarah Powers, Lee Hollingworth, Tamasin Stevenson
Background: To study the effect of cannulation time on arteriovenous fistula (AVF) survival. Methods: Analysis of two prospective databases of access operations and dialysis sessions from 12 January 2002 through 4 January 2015 with follow-up until 4 January 2016. First cannulation time (FCT), defined from operation to first cannulation, was categorized as <2 weeks, 2-4 weeks, 4-8 weeks, 8-16 weeks and ≥16 weeks. Early cannulation was defined as FCT within 4 weeks...
October 16, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29044931/a-novel-technique-for-simultaneous-hemostasis-of-ipsilateral-radial-and-ulnar-artery-access-sites
#2
Jonathan S Roberts, Jianli Niu
With the increased use of transradial artery access (TRA) for diagnostic and coronary interventional procedures, crossover to the ipsilateral ulnar artery after TRA failure is being reported more frequently. A major challenge with ipsilateral transradial and ulnar artery access is achieving efficient patent hemostasis of both the radial and ulnar arteries at the completion of the procedure. In this report, we describe two cases of failed TRA with subsequent ipsilateral ulnar artery access. A novel and practical technique of simultaneous patent hemostasis of both the ipsilateral radial and ulnar artery access sites is described, using a QuikClot(®) Radial(®) hemostasis pad and a TR Band(®) ...
October 17, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29035844/comparison-of-radial-access-guided-femoral-access-and-non-guided-femoral-access-among-women-undergoing-percutaneous-coronary-intervention
#3
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/29034783/cerebral-and-limb-tissue-oxygenation-during-peripheral-venoarterial-extracorporeal-life-support
#4
Nousjka P A Vranken, Anouk A M A Lindelauf, Antoine P Simons, Marcel J H Ariës, Jos G Maessen, Patrick W Weerwind
Femoral access in extracorporeal life support (ECLS) has been associated with regional variations in arterial oxygen saturation, potentially predisposing the patient to ischemic tissue damage. Current monitoring techniques, however, are limited to intermittent bedside evaluation of capillary refill among other factors. The aim of this study was to assess whether cerebral and limb regional tissue oxygen saturation (rSO2) values reflect changes in various patient-related parameters during venoarterial ECLS (VA-ECLS)...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29016632/radial-artery-neointimal-hyperplasia-after-transradial-pci-serial-optical-coherence-tomography-volumetric-study
#5
Petr Kala, Jan Kanovsky, Tereza Novakova, Roman Miklik, Otakar Bocek, Martin Poloczek, Petr Jerabek, Lenka Prymkova, Tomas Ondrus, Jiri Jarkovsky, Milan Blaha, Gary S Mintz
AIMS: Transradial catheterization (TRC) is a dominant access site for coronary catheterization and percutaneous coronary interventions (PCI) in many centers. Previous studies reported higher intimal thickness of the radial artery (RA) wall in patients with a previous history of TRC. In this investigation the aim was to assess the intimal changes of RA using the optical coherence tomography (OCT) intravascular imaging in a serial manner. METHODS AND RESULTS: 100 patients with the diagnosis of non-ST-elevation myocardial infarction (nSTEMI) treated by PCI were enrolled (6 patients were excluded from this analysis because of occluded RA at follow-up [2 patients] and insufficient quality of OCT images [4 patients])...
2017: PloS One
https://www.readbyqxmd.com/read/28990722/disruption-of-calcineurin-catalytic-subunit-cnaa-in-epichlo%C3%A3-festucae-induces-symbiotic-defects-and-intrahyphal-hyphae-formation
#6
Milena Mitic, Daniel Berry, Emma Brasell, Kimberly Green, Carolyn A Young, Sanjay Saikia, Jasna Rakonjac, Barry Scott
Calcineurin is a conserved calcium/calmodulin-dependent protein phosphatase, consisting of a catalytic subunit A and a regulatory subunit B, which is involved in calcium-dependent signalling and regulation of various important cellular processes. In this study we functionally characterised the catalytic subunit A (CnaA) of the endophytic fungus Epichloë festucae that forms a symbiotic association with the grass host Lolium perenne. We deleted the CnaA-encoding gene cnaA in E. festucae and examined its role in hyphal growth, cell wall integrity and symbiosis...
October 9, 2017: Molecular Plant Pathology
https://www.readbyqxmd.com/read/28984768/the-safety-and-feasibility-of-guidezilla-catheter-in-complex-coronary-interventions-and-an-observational-study
#7
Jianying Ma, Lei Hou, Juying Qian, Lei Ge, Feng Zhang, Shufu Chang, Rende Xu, Qing Qin, Junbo Ge
The monorail Guidezilla guide extension catheter was designed to provide additional backup and facilitate device delivery in percutaneous coronary intervention (PCI) for complex coronary anatomy such as chronic total occlusion (CTO), extreme vessel tortuosity, diseased bypass grafts, and anomalous coronary arteries, among others.The present retrospective, single-center study included 188 consecutive patients who underwent PCI using the Guidezilla catheter from March 2015 to August 2016. Study outcomes were rates of target lesion crossing success, procedural success, and complications...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28966445/urinary-metabolites-in-patients-undergoing-coronary-catheterization-via-the-radial-versus-femoral-artery-approach
#8
Anupama Vasudevan, Jeffrey M Schussler, Jane I Won, Paula Ashcraft, Ivy Bolanos, Matthew Williams, Teodoro Bottiglieri, Carlos E Velasco, Peter A McCullough
The transradial approach (TRA) for coronary angiography and percutaneous coronary intervention is associated with lower rates of vascular complications and acute kidney injury when compared to the transfemoral approach (TFA). Urine metabolites and proteins may be useful in identifying the dynamic changes at the vascular endothelial cell level. We attempted to explore the changes in the measurable signals of endothelial and nephron injury within 60 to 90 minutes after catheterization among those with the TRA and TFA approaches...
October 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28963366/transradial-access-lessons-learned-from-cardiology
#9
REVIEW
Brian M Snelling, Samir Sur, Sumedh Subodh Shah, Megan M Marlow, Mauricio G Cohen, Eric C Peterson
Innovations in interventional cardiology historically predate those in neuro-intervention. As such, studying trends in interventional cardiology can be useful in exploring avenues to optimise neuro-interventional techniques. One such cardiology innovation has been the steady conversion of arterial puncture sites from transfemoral access (TFA) to transradial access (TRA), a paradigm shift supported by safety benefits for patients. While neuro-intervention has unique anatomical challenges, the access itself is identical...
September 29, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28956515/endovascular-treatment-for-acute-basilar-thrombosis-via-a-transradial-approach-initial-experience-and-future-considerations
#10
M Oselkin, S R Satti, S H Sundararajan, D Kung, R W Hurst, B A Pukenas
Acute basilar artery occlusion (BAO) secondary to emergent large vessel occlusion (ELVO) has an extremely poor natural history, with a reported mortality rate up to 95%. Mechanical thrombectomy in the setting of ELVO is generally performed via a transfemoral approach. However, radial access is increasingly being utilized as an alternative. We report our initial multi-institutional experience using primary radial access in the treatment of acute BAO in nine consecutive cases. Technical success defined as a TICI score of 2B or 3 was achieved in 89% of cases...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28942869/mortality-and-operator-experience-with-vascular-access-for-percutaneous-coronary-intervention-in-patients-with-acute-coronary-syndromes-a-pairwise-and-network-meta-analysis-of-randomized-controlled-trials
#11
Rahman Shah, Reza Askari, Showkat A Haji, Abdul Rashid
BACKGROUND: Recently, several meta-analyses of randomized controlled trials (RCTs) have shown that transradial access (TRA) reduces mortality compared to transfemoral access (TFA). However, a critical appraisal of these RCTs suggests that the findings could have resulted from a greater incidence of adverse events in the TFA groups rather than a beneficial effect of TRA. METHODS: Scientific databases and websites were searched for RCTs. Patients were divided into groups based on access type and whether the operator was a radial expert (RE) or non-radial expert (NRE)...
December 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28942063/in-vivo-magnetic-resonance-imaging-mri-of-laminae-in-the-human-cortex
#12
REVIEW
Robert Trampel, Pierre-Louis Bazin, Kerrin Pine, Nikolaus Weiskopf
The human neocortex is organized radially into six layers which differ in their myelination and the density and arrangement of neuronal cells. This cortical cyto- and myeloarchitecture plays a central role in the anatomical and functional neuroanatomy but is primarily accessible through invasive histology only. To overcome this limitation, several non-invasive MRI approaches have been, and are being, developed to resolve the anatomical cortical layers. As a result, recent studies on large populations and structure-function relationships at the laminar level became possible...
September 20, 2017: NeuroImage
https://www.readbyqxmd.com/read/28939956/radial-access-protects-from-contrast-media-induced-nephropathy-after-cardiac-catheterization-procedures
#13
Thorsten Feldkamp, Maya Luedemann, Martina E Spehlmann, Sandra Freitag-Wolf, Julia Gaensbacher, Kevin Schulte, Amer Bajrovic, Dieter Hinzmann, Hans-Joerg Hippe, Ulrich Kunzendorf, Norbert Frey, Mark Luedde
OBJECTIVES: To assess, whether cardiac catheterization via radial access prevents contrast-induced nephropathy. BACKGROUND: Contrast-induced nephropathy (CIN) is a major clinical problem which accounts for more than 10% of acute kidney injury cases in hospitalized patients. Protective measures such as the infusion of isotonic saline solution or acetylcysteine have not consistently been proven to prevent acute kidney injury (AKI). However, there is growing evidence that radial access for coronary angiography and coronary intervention is associated with a lower incidence of AKI compared to femoral access...
September 22, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28931471/endovascular-treatment-of-iliac-and-common-femoral-arteries-disease-by-the-transradial-access-a-prospective-feasibility-study
#14
Roberto Lorenzoni, Cristiano Lisi, Giulia Lorenzoni, Laura Tessandori, Francesco Bovenzi
AIM: To report feasibility and safety of endovascular interventions on iliac and common femoral arteries, using the transradial access (TRA). METHODS: 100 consecutive patients (19 women; mean age 71, range 37-90years) with critical limb ischemia (30%) or claudication, and TASC A-D lesions in iliac or common femoral arteries, were prospectively enrolled, from January 2013 to June 2015, to be treated via the TRA. Exclusion criteria included no palpable radial arteries (RA) and the presence of a fistula for hemodialysis...
August 18, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
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
#15
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
#16
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/28900715/radial-versus-femoral-access-site-for-percutaneous-coronary-intervention-in-patients-suffering-acute-myocardial-infarction-a%C3%A2-randomized-prospective-multicenter-trial
#17
Christiana Schernthaner, Matthias Hammerer, Stefan Harb, Matthias Heigert, Kurt Hoellinger, Elisabeth Lassnig, Edwin Maurer, Jochen Schuler, Peter Siostrzonek, Hanno Ulmer, Andreas Winter, Johann Altenberger
BACKGROUND: Transradial access (TRA) in percutaneous coronary intervention (PCI) is a widely used standard technique with lower complication rates compared to transfemoral access (TFA). The aim of this study was to evaluate the impact of TRA versus TFA for PCI on clinically significant vascular access complications in the setting of acute myocardial infarction (AMI). METHODS: This multicenter study randomly assigned 250 patients in a 1:1 fashion (TRA vs. TFA) admitted with or without ST-segment elevation AMI undergoing immediate PCI...
September 12, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28864317/feasibility-and-safety-of-early-repeat-transradial-access-within-30-days-of-previous-coronary-angiography-and-intervention
#18
Alberto E Barria Perez, Olivier Costerousse, Tomas Cieza, Gérald Barbeau, Jean-Pierre Déry, Frédéric Maes, Goran Rimac, Guillaume Plourde, Yann Poirier, Marc-Antoine Carrier, Olivier F Bertrand
Transradial approach (TRA) is the default access site for diagnostic angiography and intervention in many centers. Repeat ipsilateral radial artery access late after index procedure has been associated with failures. It is unknown whether early (≤30 days) and very early (<24 hours) repeat radial access is technically feasible and safe. Study population consisted of consecutive patients undergoing repeat (≥2) procedures within 30 days in a high-volume TRA center. Transradial access failure and resulting femoral approach was categorized as primary (no repeat attempt) or secondary (crossover)...
October 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28863659/taylor-couette-flow-with-radial-fluid-injection
#19
Nikolas Wilkinson, Cari S Dutcher
Taylor-Couette cells have been shown to improve a number of industrial processes due to the wide variety of hydrodynamic flow states accessible. Traditional designs, however, limit the ability to introduce new fluids into the annulus during device operation due to geometric confinement and complexity. In this paper, a co- and counter-rotating Taylor-Couette cell with radial fluid injection has been constructed. The incorporation of 16 ports in the inner cylinder enables radial fluid injection during rotation of both cylinders...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28858356/2d-reentrant-auxetic-structures-of-graphene-cnt-networks-for-omnidirectionally-stretchable-supercapacitors
#20
Byoung Soo Kim, Kangsuk Lee, Seulki Kang, Soyeon Lee, Jun Beom Pyo, In Suk Choi, Kookheon Char, Jong Hyuk Park, Sang-Soo Lee, Jonghwi Lee, Jeong Gon Son
Stretchable energy storage systems are essential for the realization of implantable and epidermal electronics. However, high-performance stretchable supercapacitors have received less attention because currently available processing techniques and material structures are too limited to overcome the trade-off relationship among electrical conductivity, ion-accessible surface area, and stretchability of electrodes. Herein, we introduce novel 2D reentrant cellular structures of porous graphene/CNT networks for omnidirectionally stretchable supercapacitor electrodes...
September 14, 2017: Nanoscale
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