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Abstract
Diaspirin crosslinked hemoglobin (DCLHbTM; Baxter Healthcare Corp., Round Lake. IL, USA) is a biochemically stable hemoglobin based solution with excellent oxygen carrying capacity. Studies have been conducted in male rats to determine the effect of DCLHb on systemic and regional blood circulation. However, the cardiovascular effect of DCLHb has not been studied in female rats. In the present study the effect of DCLHb (400 mg/kg, i.v.) was observed on systemic hemodynamic parameters and regional blood circulation in non-pregnant rats, and in 9-day pregnant and 18-day pregnant rats. DCLHb increased mean arterial pressure (MAP) and total peripheral resistance (TPR) and increased blood flow to the heart, gastrointestinal tract (GIT), mesentery & pancreas, and skin in all groups of rats. The basal blood flow to the ovaries was higher in 18-day pregnant rats when compared to non-pregnant and 9-day pregnant rats. DCLHb further increased blood flow to the ovaries of 18-day pregnant rats. It is concluded that DCLHb increases blood flow to the heart, GIT and skin as a result of redistribution of blood from the musculoskeletal system. Blood flow in female reproductive organs is not altered by DCLHb in non-pregnant rats and during mid-term pregnancy. However, in advanced stages of pregnancy DCLHb increases blood flow to the ovaries.