An extraction device for a biological fluid with an additive solution in which it is desirable for the additive solution to be present in a particular volume proportion to the biological fluid. The volume proportion of the additive solution is determined by the ratio of cross sections of two tubes, one...http://www.google.fr/patents/US7427278?utm_source=gb-gplus-shareBrevet US7427278 - Extraction device with tubes having different cross-sections
Extraction device with tubes having different cross-sections
