[Influence of the ventilation mechanics on the hematocrit value. II. Research on patients subjected to pleural and pericardial punctures].

Changes in haematocrit values in rabbits subjected to pleural and pericardial puncture were studied. Highly significant decreases were noted. These are attributed to lung re-expansion with redistribution of the capillary bed, together with improved venous reflux, with predominance of the first or second phenomenon for each group. Better redistribution of the circulating blood mass results from these changes.