A cartridge for use with an analyzer console, the cartridge comprising: a blood sample receiver configured to receive a blood sample to be tested; blood processing and testing paths (130a, 130b, 130c, 130d, 130e), each blood processing and testing path (130a, 130b, 130c, 130d, 130e) being configured to receive a portion of the blood sample and comprising: a measuring chamber (132a, 132b, 132c, 132d, 132e) in fluid communication with the blood sample receiver, the measuring chamber (132a, 132b, 132c, 132d, 132e) having a selected internal volume to contain the portion of the blood sample; a mixing chamber (134a, 134b, 134c, 134d, 134e) in fluid communication with the measuring chamber (132a, 132b, 132c, 132d, 132e) and containing a reagent, the mixing chamber (134a, 134b, 134c, 134d, 134e) being configured to receive the portion of the blood sample from the measuring chamber (132a, 132b, 132c, 132d, 132e) and to allow the portion of the blood sample to contact the reagent; a blood testing chamber (136a, 136b, 136c, 136d, 136e) configured to receive a mixture based on the portion of the blood sample and the reagent for a test to be performed on the mixture within the blood testing chamber (136a, 136b, 136c, 136d, 136e); and wherein mixing to produce the mixture occurs in the mixing chamber (134a, 134b, 134c, 134d, 134e) and in a channel downstream from the mixing chamber (132a, 132b, 132c, 132d, 132e); a vacuum application port and an air pressure vent; wherein a negative pressure is applied via the vacuum application port, wherein the air pressure vent can be opened or closed by the analyzer console, and wherein the negative pressure at the vacuum application port and the air pressure vent closed controls flow of a portion of the blood sample into each measuring chamber (132a, 132b, 132c, 132d, 132e). a blood sample receiver configured to receive a blood sample to be tested; blood processing and testing paths (130a, 130b, 130c, 130d, 130e), each blood processing and testing path (130a, 130b, 130c, 130d, 130e) being configured to receive a portion of the blood sample and comprising: a measuring chamber (132a, 132b, 132c, 132d, 132e) in fluid communication with the blood sample receiver, the measuring chamber (132a, 132b, 132c, 132d, 132e) having a selected internal volume to contain the portion of the blood sample; a mixing chamber (134a, 134b, 134c, 134d, 134e) in fluid communication with the measuring chamber (132a, 132b, 132c, 132d, 132e) and containing a reagent, the mixing chamber (134a, 134b, 134c, 134d, 134e) being configured to receive the portion of the blood sample from the measuring chamber (132a, 132b, 132c, 132d, 132e) and to allow the portion of the blood sample to contact the reagent; a blood testing chamber (136a, 136b, 136c, 136d, 136e) configured to receive a mixture based on the portion of the blood sample and the reagent for a test to be performed on the mixture within the blood testing chamber (136a, 136b, 136c, 136d, 136e); and a measuring chamber (132a, 132b, 132c, 132d, 132e) in fluid communication with the blood sample receiver, the measuring chamber (132a, 132b, 132c, 132d, 132e) having a selected internal volume to contain the portion of the blood sample; a mixing chamber (134a, 134b, 134c, 134d, 134e) in fluid communication with the measuring chamber (132a, 132b, 132c, 132d, 132e) and containing a reagent, the mixing chamber (134a, 134b, 134c, 134d, 134e) being configured to receive the portion of the blood sample from the measuring chamber (132a, 132b, 132c, 132d, 132e) and to allow the portion of the blood sample to contact the reagent; a blood testing chamber (136a, 136b, 136c, 136d, 136e) configured to receive a mixture based on the portion of the blood sample and the reagent for a test to be performed on the mixture within the blood testing chamber (136a, 136b, 136c, 136d, 136e); and wherein mixing to produce the mixture occurs in the mixing chamber (134a, 134b, 134c, 134d, 134e) and in a channel downstream from the mixing chamber (132a, 132b, 132c, 132d, 132e); a vacuum application port and an air pressure vent; wherein a negative pressure is applied via the vacuum application port, wherein the air pressure vent can be opened or closed by the analyzer console, and wherein the negative pressure at the vacuum application port and the air pressure vent closed controls flow of a portion of the blood sample into each measuring chamber (132a, 132b, 132c, 132d, 132e).