Adjusting experimentally to have similar amount between simultaneous blood replacement and depletion, and giving various solution to 15 adults dogs, effects on the blood compositions were investigated. The solution used in this experiment were crystalloids represented by saline solution, glucose represented by 596 dextrose solution, and colloidal solution such as glycoalgin etc.
In 3 cases saline solution was used. In one case Ringer's solution was used. In 3 cases 5% dextrose solution was used. In two cases Ramel solution was used. In 3 cases glycoalgin solution was used. In one case plasgen, dextran-G and blood itself was used.
Results:
Gradual diminutive changes of RBC and hemoglobin concentration were noted with crystalloid-, glucose-, and colloidal-solution till the amount of depleted blood reached 10-20ml/kg body weight. Beyond this level the decrement became sharp. When blood was used for replacement, this decrement was not observed till the level of depleted blood reached 60ml/kg, then diminution was rather minimal.
The reticulocyte count had remarkable increase with crystal-, glucose-solution, and in the glycoalgin case, while rather minimum increase was shown in plasgen and dextran-G cases.
In the animals who had replacement with glucose-, crystal-solution and glycoalgin, a marked shift to left of the reticulocyte series was noted. Except in the animal where blood was used for replacement, protein concentration decreased in all of these experiments. The diminution was 4-15% in depleted animals with 10ml/kg body weight, 20-27% in 20ml/kg, 30-36% in 30ml/kg, and 35-46% in 40ml/kg bled dogs.
Decrease of hematocrit values occured in all animals. When the depleted amount reached 10ml/kg, then the decrease was found to be 4-7%, in 20ml/kg 10-21%, 30ml/kg 22-33%, and in 40ml/kg depletion the decrease was 33-38%.
In the animal where blood was used for replacement, the hematocrit value did not change till the depleted amount reached 60ml/kg; beyond this value, whole picture was minimal.
In the animal where blood was replaced with crystalloid solution, a retardation of sedimentation rate was observed. This retardation of sedimentation rate was, however, temporary and it soon returned to its pre-experimental value. Retardation was also noted in the case given plasgen, but acceleration of sedimentation rate was observed in the animals where dextran and glycoalgin were used as the replacements.
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