blanch test

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BLANCH TEST: Blanching of the finger after compression
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BLANCH TEST: Color returns to the digit; the normal delay in color return is 2 seconds or less

blanch test

, blanching test
A test of the integrity of the circulation performed by applying and then quickly releasing pressure to a fingernail or toenail. After losing color, the blanched nail normally regains a pink appearance within 2 seconds or less. Failure to do so suggests impaired blood flow to the extremity.
Synonym: capillary nail refill test See: illustration
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References in periodicals archive ?
Dysplastic tissues with significant keratinization (leukoplakia) can exhibit increased whiteness with loss of fluorescence (darkness) around the periphery of the lesion.[sup][9],[10] All the cases which appeared dark or brownish under VELscope were subjected to blanch test which involves rubbing and pressing lesion with mirror end and rescrutinizing the lesion.