Final answer:
Increasing hemoglobin concentration improves oxygen delivery to tissues, with hemoglobin's oxygen affinity increasing with higher saturation levels, directly impacting the efficiency of oxygen transportation.
Step-by-step explanation:
Increasing the hemoglobin concentration from 7 g/dL to 9 g/dL can significantly enhance oxygen delivery to tissues. This increment is critical, especially in patients with conditions like anemia, where there is insufficient hemoglobin to meet the oxygen demands of the body. The percent saturation of hemoglobin is a clinical indicator of how many hemoglobin sites are occupied by oxygen molecules. The more saturated hemoglobin is, the higher its affinity for oxygen becomes, up to its maximum capacity. Therefore, increases in hemoglobin concentration directly impact oxygen transport efficiency, improving oxygen availability to tissues even without changes in cardiac output. Although the exact percent increase in oxygen delivery is not provided, the positive correlation between hemoglobin concentration and oxygen delivery is evident.