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Volume 137, Issue 3 , Pages 785-786 , March 2009

Reply to the Editor:

Modified Allen test. Both radial and ulnar arteries are occluded with three fingers each, with counterforce provided by ipsilateral thumb on dorsum of wrist for as long as 10 seconds while patient clo

Modified Allen test. Both radial and ulnar arteries are occluded with three fingers each, with counterforce provided by ipsilateral thumb on dorsum of wrist for as long as 10 seconds while patient closes hand. This ensure that recurrent superficial palmar artery arising early from radial artery is occluded, thus avoiding false-negative results.
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