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The shuttle valve in each of its three positions.

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posted on 24.08.2017, 17:57 by Alexis F. Sauer-Budge, Samuel J. Brookfield, Ronald Janzen, Sarah McGray, Anna Boardman, Holger Wirz, Nira R. Pollock

Left: shuttle valve position one; airflow between capillary and atmosphere, allowing capillary to be filled. Middle: shuttle valve position two; airflow between piston chamber and capillary, allowing blood to be dispensed. Right: shuttle valve position three; airflow between atmosphere and piston chamber, allowing the chamber to be primed for another dispense.