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Journal of Interventional and General Cardiology
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Allens Test

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Allens Test

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Allens Test

Allens Test is a medical sign used in physical examination of arterial blood flow to the hands. In the Allen test, one hand is examined at a time: 1. The hand is elevated and the patient is asked to clench their fist for about 30 seconds. 2. Pressure is applied over the ulnar and the radial arteries so as to occlude both of them. 3. Still elevated, the hand is then opened. It should appear blanched (pallor may be observed at the finger nails). 4. Ulnar pressure is released while radial pressure is maintained, and the colour should return within 5 to 15 seconds. If color returns as described, Allen's test is considered to be normal. If color fails to return, the test is considered abnormal and it suggests that the ulnar artery supply to the hand is not sufficient.

Allens Test

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