The Blood Volume of the Adult Rat,as Determined by Fe 59 and P 32 Labelled Red Cells. ∗

Abstract

Conclusions

1. The blood volume of normal rats determined by the use of Fe⁵⁹ labeled red blood cells is essentially the same as with P³² labeled cells.

2. The use of P³² labelled red blood cells is hence satisfactory for the determination of blood volume.

3. Determinations with P³² indicate that the blood volume of the normal rat is 4.59 ± 0.57/cc 100 g body weight; the total red cell volume 2.16 ± 0.20 cc/100 g body weight; and the hematocrit 45.8 ± 2.6.