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blood cotton swab / cotton swab

blood cotton swab
blood cotton swab

The patient requires blood transfusion at the time of badly hert. But we can't know the blood type at once. This cotton applicator could test patients' blood type when we use it. The cotton ball's color will change when touching the blood. There is a blood-color matching graph on the stick. We can identify the blood type according to matching the color between the cotton ball and the graph.

University

Zhejiang University

Zhejiang University
Hangzhou, ZHEJIANG PROVINCE, China

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Design

Zhejiang University

Zhejiang University
Hangzhou, China

Tang Zhichuan