Figure 3.

Graph illustrating pH (A), and box plots illustrating the partial pressures of oxygen (pO₂) (B) and carbon dioxide (pCO₂) (C) in the platelet concentrate during each day of storage. A, There was a statistically significant decrease in pH on day 7 compared to each of the other days. ^acd P < .01, ^be P < .001. B, There was significant variation of pO₂ over the study period ending with a significant increase on day 7. ^a P < .05, ^bc P < .01. C, Partial pressures of carbon dioxide decreased significantly over time with the most marked decrease between days 0 and 7. ^afn P < .05, ^bcdeghijkm P < .001, ^l P < .001