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Radial artery Anatomy Animation : Course, Branches, Clinical aspects - Usmle review
Location and Course:
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The radial artery is a major artery in the forearm. It is the smaller terminal branch of the brachial artery, beginning at the level of the neck of the radius. It travels along the radial (lateral) side of the forearm, crossing over the floor of the anatomical snuffbox, and terminating in the deep palmar arch of the hand.
Branches:
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The radial artery gives off numerous branches, including:
Radial recurrent artery: arises near the radial head to anastomose with the radial collateral artery, providing collateral circulation during elbow flexion.
Palmar carpal branches: contribute to the carpal arches along with the ulnar artery.
Superficial palmar branch: typically joins with the ending of the ulnar artery to form the superficial palmar arch.
Deep palmar branch: passes between the first dorsal interosseous muscle and oblique head of the adductor pollicis to form the deep palmar arch with the deep branch of the ulnar artery.
Clinical Significance:
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Radial Pulse: The radial artery is commonly used to palpate the pulse due to its superficial location. It can give information about heart rate and rhythm.
Allen Test: This is a test used to evaluate collateral circulation in the hand before arterial blood sampling or cannulation of the radial artery. The patient is asked to clench their fist as the physician occludes both the radial and ulnar arteries. When the fist is opened, the hand should appear blanched. The physician then releases pressure from one of the arteries to see if blood flow returns to normal, indicating sufficient collateral circulation.
Catheterization: The radial artery is often used for arterial catheterization due to its accessibility and good collateral circulation.
Radial Artery Graft: The radial artery may be used as a conduit for coronary artery bypass grafting (CABG) due to its resistance to atherosclerosis.
USMLE Pearls:
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The radial artery, along with the ulnar artery, is responsible for the dual blood supply to the hand. This is tested through the Allen test prior to procedures involving these arteries.
The radial artery is the most commonly used site for arterial blood gas (ABG) sampling.
The radial artery can be harvested for use in coronary artery bypass grafting.
Remember, anatomy questions on the USMLE often involve a clinical scenario, so understanding the clinical relevance of anatomical structures is key.
"Boost your USMLE prep with our detailed guide to the radial artery anatomy! We delve into its intricate course, branches, and relevant clinical aspects. Featuring clear, high-quality 3D animations and concise explanations, this video is perfect for medical students, aspiring physicians, or anyone interested in human anatomy. Whether you're preparing for the USMLE, refreshing your knowledge, or starting from scratch, join us on this fascinating journey through one of the key arteries in the human body. Don't forget to like, share, subscribe, and hit the bell icon for notifications on our future content. Happy learning!
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