Radial Artery Access
Radial Artery Access - Related Videos
06:57
Arterial Line Placement
0 Views •
2023
Source: Sharon Bord, MD, Department of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA When monitoring patients, it is important to obtain values that are accurate and reliable. Blood pressure monitoring is one of the essential vital signs, and for a majority of patients, measuring it utilizing non-invasive techniques provides accurate values. However, there are situations in which the blood pressure requires more exact, specific, and reliable measurements.
01:23
Radial System Protection
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2024
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system. In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
02:39
Evaluating Motor Impairment in C. elegans Models Using the Radial Locomotion Assay
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2025
This video demonstrates the use of a radial locomotion assay to evaluate motor dysfunction in C. elegans expressing either wild-type or ALS-mutant human TDP-43 protein. Worms with varying levels of wild-type or mutant TDP-43 expression are allowed to crawl, and their movement is measured by the radial distance traveled from the central point on the assay plate. The assay distinguishes between mild, moderate, and severe motor impairments based on the distance traveled by the different C. elegans...
05:16
An Ultrasound-Guided Vascular Access Procedure in an Anesthetized Pig
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2026
Source:Rui Cerqueira1,2, Liliana Costa1, André Leite-Moreira1, Adelino Leite-Moreira1,2, André Lourenço1, Pedro Mendes-Ferreira11Department of Surgery and Physiology, Faculty of Medicine of the University of Porto.2Department of Cardiothoracic Surgery, Hospital Universitário de São João.The video demonstrates a procedure for obtaining vascular access in an anesthetized pig using ultrasound guidance. After disinfecting the site and administering local anesthesia, an ultrasound probe is used to...
08:09
Use of an Eight-arm Radial Water Maze to Assess Working and Reference Memory Following Neonatal Brain Injury
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Cited by 61 •
2013
The eight-arm radial water maze is designed to evaluate reference and working memory performance simultaneously by requiring subjects to use extra-maze cues to locate escape platforms and remedies the limitations observed in land based radial arm maze designs.
FAQs
Collateral circulation provides an alternative blood supply to the hand while the radial artery is punctured or occupied by a catheter. This matters because preserving hand perfusion is an essential procedural consideration. Clinicians therefore confirm blood flow and monitor perfusion during access, helping identify whether the hand continues to receive adequate circulation throughout the intervention.
The Seldinger technique creates a controlled pathway from the artery to the vascular system. After local anesthesia, a needle enters the radial artery, a guidewire advances through the needle, and the catheter follows the wire. This sequence allows catheter placement while limiting the period in which the artery is directly occupied by the needle.
Compared with femoral access, radial access can reduce bleeding at the access site and support earlier mobilization after a procedure. These advantages are particularly relevant when clinicians want to limit recovery restrictions related to the puncture site. The choice still depends on procedural feasibility, because navigating the vessels can be difficult in some cases.
Arterial spasm and arterial occlusion are important complications to consider, along with difficulty navigating the vessels during catheter advancement. These issues can interfere with successful catheter movement or affect blood flow through the accessed artery. Confirming flow and maintaining collateral hand perfusion are therefore central safety considerations during and after the procedure.
Clinicians first provide local anesthesia, then puncture the radial artery with a needle. They advance a guidewire through the puncture site and use it to place the catheter according to the Seldinger technique. Blood flow is confirmed during the process, while hand perfusion through collateral circulation remains an important condition to maintain.
Radial access supports several vascular and cardiac applications, including coronary angiography and percutaneous coronary intervention. Coronary angiography uses catheter-based access to support evaluation of the coronary vessels, whereas percutaneous coronary intervention uses that access during treatment. The approach can also provide a route for hemodynamic assessment and continuous arterial monitoring.
Beyond serving as a route for catheter-based intervention, radial arterial access can support hemodynamic assessment and continuous arterial monitoring. These uses allow clinicians to follow arterial pressure or assess circulatory status through the accessed artery. Its value therefore extends from procedural access for coronary care to ongoing physiological observation in appropriate medical settings.