Allen's test : radial artery occlusion | The White Army #ComprehensiveClinics

In the modified Allen test, one hand is examined at a time:

The hand is elevated and the patient is asked to clench their fist for about 30 seconds.

Pressure is applied over the ulnar and the radial arteries so as to occlude both of them.

Still elevated, the hand is then opened. It should appear blanched (pallor may be observed at the finger nails).

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 arterial occlusion.

The hand is normally supplied by blood from both the ulnar and radial arteries. The arteries join in the hand. Thus, if the blood supply from one of the arteries is cut off, the other artery can supply adequate blood to the hand. A minority of people lack this dual blood supply due to some condition.

DISCLAIMER
We do not own or claim to own any of the media used in the following video/stream.The media belong to their respective owners who may have copyright over them. The images have been taken from various sources to educate people.There is no commercial use of the media by THE WHITE ARMY.