Conversely the higher the total hemoglobin content. the greater is the tendency toward cyanosis thus, patients with marked polycythemia(红细胞增多症) tend to be cyanotic at higher levels of Sao, than patients with normal hematocrit(红细胞压积 valuesConversely, the higher the total hemoglobin content, the greater is the tendency toward cyanosis; thus, patients with marked polycythemia(红细胞增多症)tend to be cyanotic at higher levels of SaO2 than patients with normal hematocrit(红细胞压积) values