title: Comparison of the plasma volume-expanding effects of 6% dextran 70, 5% albumin, and 6% HES 130/0.4 after hemorrhage in the guinea pig.
abstract: BACKGROUND
  We still lack comparing data of the plasma volume (PV)-expanding effect of the most commonly used colloids including dextran 70. This study compares the PV-expanding effects of 6% dextran 70, 5% albumin, and 6% hydroxyethylstarch (HES) 130/0.4 after a standardized hemorrhage.
  
  
  METHODS
  The prospective and randomized study on 33 anesthetized adult male guinea pigs involved three groups (n = 11 each); the dextran group, the albumin group, and the HES group. The left carotis artery was cannulated for blood pressure measurements and blood samples, and the right jugular vein was cannulated for infusions. After hemorrhage of 20 mL/kg for 8 minutes, the animals were transfused with 20 mL/kg of the colloid for 10 minutes. PV was determined with a I-albumin tracer dilution technique at baseline and 3 hours after the colloid infusion. The PV just after hemorrhage was calculated as the baseline value minus bled PV. Blood gases were measured at baseline, after hemorrhage, just after the colloid infusion and at the end of the experiment.
  
  
  RESULTS
  The increase in PV 3 hours after the colloid infusion, including the 20 mL infused, was 36.3 mL/kg +/- 2.3 mL/kg in the dextran group, 26.4 mL/kg +/- 4.7 mL/kg in the albumin group, and 17.6 mL/kg +/- 3.5 mL/kg in the HES group. At the end of the experiment, hematocrit was lower in the dextran group than in the albumin and the HES groups. Urine production was higher in the HES group than in the dextran and the albumin groups.
  
  
  CONCLUSIONS
  After hemorrhage, the PV-expanding capacity of 6% dextran 70 was better than that of 5% albumin, which was in turn better than that of HES 130/0.4 given in equal volumes.
authors.affiliation: Department of Anesthesiology, Lund University and Lund University Hospital, Lund, Sweden.
authors.forename: Maris
authors.initials: M
authors.lastname: Dubniks
authors.forename: Johan
authors.initials: J
authors.lastname: Persson
authors.forename: Per-Olof
authors.initials: PO
authors.lastname: Grände
mesh_terms: D000418:Albumins / Q000008:administration & dosage / Q000494:pharmacology*; D000818:Animals; D001784:Blood Gas Analysis; D002199:Capillary Permeability; D003911:Dextrans / Q000008:administration & dosage / Q000494:pharmacology*; D004195:Disease Models, Animal; D006168:Guinea Pigs; D006470:Hemorrhage / Q000503:physiopathology*; D006895:Hydroxyethyl Starch Derivatives / Q000008:administration & dosage / Q000494:pharmacology*; D007201:Indicator Dilution Techniques; D007262:Infusions, Intravenous; D008297:Male; D010952:Plasma Substitutes / Q000008:administration & dosage / Q000494:pharmacology*; D010953:Plasma Volume / Q000187:drug effects*; D011446:Prospective Studies; D011897:Random Allocation
chemical_list: D000418:Albumins; D003911:Dextrans; D006895:Hydroxyethyl Starch Derivatives; D010952:Plasma Substitutes