ESR tube is usd for testing erythrocyte sedimentation rate. The additive is 3.8% sodium citrate and the concentration for additive and blood is 1:4.8*120 glass tube can match automatic ESR analyzer or visual type blood sedimentation rack to use. This is a closed system an it Can be manipulated directly without opening the cap.

Mixing Requirements:After blood collection,turn the tube upside down with 180 degree and shake it 8-10 times carefully.

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