Effects of preoperative intentional hemodilution on the extravasation rate of albumin and fluid

Jean François Payen, Jean Philippe Vuillez, Bruno Geoffray, Jean Luc Lafond, Michel Comet, Paul Stieglitz, Claude Jacquot

Research output: Contribution to journalArticlepeer-review


Objective: To evaluate the effects of preoperative intentional hemodilution with 4% albumin solution on the extravasation rate of intravascular albumin and fluid in surgical patients. Design: A prospective, randomized, clinical study. Setting: University teaching hospital. Patients: Two groups (control group [group 1] and hemodiluted group [group 2]) of 13 healthy patients were studied during a long-term (>4 hrs) surgical procedure. Interventions: Autologous technetium-99m (99mTc)-labeled red blood cells and indium-oxine (111In)-labeled human serum albumin were injected intravenously during anesthesia at T= 0 min in the two groups for the determination of total blood volume and albumin diffusion space, respectively. In addition, body tetrapolar electrical impedance was used to assess extracellular fluid volume. In the hemodiluted group (group 2), 15 mL/kg of blood was withdrawn over 30 mins (T = 20 mins to T = 50 mins) and simultaneously replaced by an equal volume of 4% albumin solution (0.6 g/kg). Measurements and Main Results: The albumin diffusion space, the colloid oncotic pressure, the plasma albumin concentration and the electrical impedance were measured before (T = 10 mins) and after (T = 60, 120, and 240 mins) hemodilution. Urine was collected from T = 10 mins to T = 240 mins. The total blood volume was calculated at T = 10 mins. No differences in the initial values were found between the two groups. In group 2, hemodilution(hematocrit 30 ± 3%) resulted in a steeper increase in the albumin diffusion space (p < .05) and a progressive decrease in the body electrical impedance (p < .05). The extravasation rate of albumin was 0.052 ± 0.007 mL/kg/min in group 2 vs. 0.038 ± 0.020 mL/kg/min in group 1 (p < .05). The value of calculated plasma volume at T = 0 rain did not shown any difference between the two groups. This value was then lower than expected in group 2, corresponding to a loss of plasma volume of >3 mL/kg. Urine output was significantly lower in group 2 than in group 1 (0.7 ± 0.4 vs. 1.4 ± 1.0 mL/min, respectively; p < .05). A comparable decrease in colloid oncotic pressure and in plasma albumin concentration was observed in both groups. Conclusions: These results suggest that preoperative hemodilution using 4% albumin on a 1:1 volume basis for blood substitution during a prolonged surgical procedure with reduced blood losses enhances the extravasation rate of albumin and fluid to the interstitial tissues, impeding the maintenance of isovolemia. These findings support the use of a volume of infused colloid solution higher than that of withdrawn blood during preoperative hemodilution.

Original languageEnglish (US)
Pages (from-to)243-248
Number of pages6
JournalCritical care medicine
Issue number2
StatePublished - Mar 3 1997


  • albumin diffusion space
  • albumin solution
  • colloid osmotic pressure
  • electrical impedance
  • extracellular fluid volume
  • extravasation rate
  • hematocrit
  • hemodilution
  • oncotic pressure
  • plasma volume

ASJC Scopus subject areas

  • Critical Care and Intensive Care Medicine


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