A middle-aged couple has had their hemoglobin and hematocrit levels measured at a community health fair. How would the nurse explain the results of these tests?
1. Hemoglobin values vary between men and women, but hematocrit values do not.
2. Hemoglobin is the percentage of iron-carrying protein in a standard volume of blood, whereas hematocrit is an indicator of the amount of that protein in a red blood cell.
3. Normal hematocrit values are about 3 times the hemoglobin value.
4. Hemoglobin can change quickly due to dehydration.
3
Rationale 1: Hematocrit levels do vary between men and women.
Rationale 2: Hemoglobin is the amount of functional or iron-carrying protein in the red blood cell. Hematocrit is reported as a percentage of hemoglobin present in a given volume of whole blood.
Rationale 3: Hematocrit level can be estimated by multiplying the hemoglobin by 3.
Rationale 4: Hematocrit is affected by hydration status; hemoglobin is not.
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