TCT-425 Rotterdam Radial Access Research: Radial Artery Access Evaluation After Coronary Procedures With Very High Resolution Ultrasound; The Puncture’s Footprint

2015 ◽  
Vol 66 (15) ◽  
pp. B173
Author(s):  
Jurgen Ligthart ◽  
Karen T. Witberg ◽  
Francesco Costa ◽  
Marco Valgimigli ◽  
Nicolas M. Van Mieghem
Keyword(s):  
High Resolution ◽  
Radial Artery ◽  
Radial Access ◽  
Coronary Procedures ◽  
Very High

Outcome off Primary Coronary Angioplasty by Radial Route: Study on 100 Cases

2018 ◽  
Vol 3 (06) ◽  
Author(s):  
Dr. Dilip Ratnani ◽  
Dr. Rekha Ratnani
Keyword(s):  
Hospital Stay ◽  
Radial Artery ◽  
Bleeding Complications ◽  
Access Site ◽  
Transfemoral Approach ◽  
Artery Cannulation ◽  
Catheterization Laboratory ◽  
Cardiac Catheterization Laboratory ◽  
Radial Access ◽  
Coronary Procedures

Recently radial artery is being used as a vascular access route for coronary procedures. Primary angioplasty with transfemoral procedure is associated with high access site bleeding complications due to use of potent antiplatelets and anticoagulants therefore radial access should be preferred if the operators are experienced and familiar with the technique. Methods: Total 100 pa‡…tients were included in the study in which procedure was performed by the trans radial route. All routine laboratory investigations were performed. Support of a temporary pacemaker was kept ready. All patients were prepared according to the Cardiac Catheterization Laboratory Standards. Radial artery cannulation was performed. Results: 100 patients were included in the study selected for radial route. Mean age of the patients who underwent primary CAI was 59±8.4. The most affected artery in the as shown angiography was Left anterior descending (58%) followed by Right coronary artery (41%). Least affected artery was left main (6%) and Ramus intermedius (6%). Mean of diseased vessels was 1.34 ± 1.25. Crossover from radial to femoral route was done on 5 patients of which 2 patients were having radial artery anomaly and in 3 patients arterial puncture was not successful. Mean hospital stay of the patients after procedure was 6.8 ± 2.1. Conclusion: transradial approach for coronary procedures is a safe technique and gives similar clinical results to transfemoral access. Complications at the radial access site are negligible. Length of hospital stay, time to mobilisation and cost all are reduced in the transfemoral approach.

scholarly journals Evaluation of radial artery occlusion in patients undergoing diagnostic and therapeutic coronary procedures via distal radial access. A retrospective observational study (RDISTAL DOR)

2021 ◽  
Vol 29 ◽  
pp. 1-7
Author(s):  
Marden Tebet ◽  
Mickael Ogama ◽  
Sergio Kreimer ◽  
Eduardo Santos ◽  
Pedro Andrade ◽  
...  
Keyword(s):  
Doppler Ultrasound ◽  
Radial Artery ◽  
Diagnostic Procedures ◽  
Artery Occlusion ◽  
Vascular Complication ◽  
Medical Community ◽  
Coronary Syndrome ◽  
Radial Access ◽  
Coronary Procedures ◽  
Radial Artery Occlusion

Background: The use of the distal radial access for invasive coronary procedures has been rapidly adopted by the medical community, but with no evaluation of efficacy and safety outcomes of this approach. The objective was to evaluate the rate of radial artery occlusion involved in this technique, using Doppler ultrasound. Methods: This was an observational, retrospective study involving patients undergoing invasive diagnostic or therapeutic coronary procedures via distal radial access, with assessment of the radial artery patency by Doppler ultrasound. The primary outcome analyzed was the rate of radial artery occlusion. Results: Between July and December 2020, 51 patients underwent procedures via distal radial access, with assessment of the radial artery patency, out of a total of 603 patients seen during this period. Patients were aged 58±10.8 years, 68.6% were male, 26.9% had diabetes mellitus, and 68.6% were diagnosed with acute coronary syndrome. Diagnostic procedures were performed in 68.2% of sample, and 23.5% of patients had undergone a previous use of the ipsilateral proximal radial access. Doppler ultrasound was performed over a mean period of 24 hours, and no occlusion of the radial artery was observed, with mean time for sheath insertion of 1.9 minutes. There was no major vascular complication. In two patients, pain was observed at the access point; another two had a small subcutaneous hematoma, and, one patient, presented with moderate spasm. Conclusion: The use of distal radial access was associated with a low rate of hemorrhagic complications in the access route, and absence of occlusion of the radial artery by Doppler ultrasound assessment.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

Three-dimensional fault geometry and kinematics of the 2008 M 7.1 Yutian earthquake revealed by very-high resolution satellite stereo imagery

2019 ◽  
Vol 232 ◽  
pp. 111300
Author(s):  
Xiaogang Song ◽  
Nana Han ◽  
Xinjian Shan ◽  
Chisheng Wang ◽  
Yingfeng Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Three Dimensional ◽  
Fault Geometry ◽  
Stereo Imagery ◽  
Very High ◽  
Geometry And Kinematics

scholarly journals Object Oriented Classification for Mapping Mixed and Pure Forest Stands Using Very-High Resolution Imagery

2021 ◽  
Vol 13 (13) ◽  
pp. 2508
Author(s):  
Loredana Oreti ◽  
Diego Giuliarelli ◽  
Antonio Tomao ◽  
Anna Barbati
Keyword(s):  
High Resolution ◽  
Spatial Scales ◽  
Parametric Method ◽  
Mixed Forest ◽  
Mixed Stands ◽  
Mapping Unit ◽  
Mixed Forests ◽  
High Resolution Imagery ◽  
Very High Resolution Imagery ◽  
Very High

The importance of mixed forests is increasingly recognized on a scientific level, due to their greater productivity and efficiency in resource use, compared to pure stands. However, a reliable quantification of the actual spatial extent of mixed stands on a fine spatial scale is still lacking. Indeed, classification and mapping of mixed populations, especially with semi-automatic procedures, has been a challenging issue up to date. The main objective of this study is to evaluate the potential of Object-Based Image Analysis (OBIA) and Very-High-Resolution imagery (VHR) to detect and map mixed forests of broadleaves and coniferous trees with a Minimum Mapping Unit (MMU) of 500 m2. This study evaluates segmentation-based classification paired with non-parametric method K- nearest-neighbors (K-NN), trained with a dataset independent from the validation one. The forest area mapped as mixed forest canopies in the study area amounts to 11%, with an overall accuracy being equal to 85% and K of 0.78. Better levels of user and producer accuracies (85–93%) are reached in conifer and broadleaved dominated stands. The study findings demonstrate that the very high resolution images (0.20 m of spatial resolutions) can be reliably used to detect the fine-grained pattern of rare mixed forests, thus supporting the monitoring and management of forest resources also on fine spatial scales.

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