scholarly journals Electrolyte and Haematocrit Changes in The Blood of Sheep From Foetal to Postnatal Life

1961 ◽  
Vol 14 (1) ◽  
pp. 87 ◽  
Author(s):  
JV Evans ◽  
MH Blunt
Keyword(s):  
Blood Plasma ◽  
Cell Volume ◽  
Whole Blood ◽  
Packed Cell Volume ◽  
Postnatal Life

Foetal and postnatal packed cell volume percentages and whole blood, plasma, and erythrocyte potassium and sodium concentrations have been studied in the sheep.

The influence of changes in $$p_{CO_2 } $$ on the fractional packed cell volume of whole blood

1981 ◽  
Vol 392 (2) ◽  
pp. 146-151
Author(s):  
A. Luttmann ◽  
K. M�ckenhoff ◽  
H. H. Loeschcke ◽  
A. Plaas-Link
Keyword(s):  
Cell Volume ◽  
Whole Blood ◽  
Packed Cell Volume

scholarly journals Diagnostic value of copper parameters to predict growth of suckling calves grazing native range in Argentina

2010 ◽  
Vol 30 (10) ◽  
pp. 827-832 ◽  
Author(s):  
Luis E Fazzio ◽  
Guillermo A Mattioli ◽  
Sebastian J Picco ◽  
Diana E Rosa ◽  
Leonardo Minatel ◽  
...  
Keyword(s):  
Cell Volume ◽  
Whole Blood ◽  
Packed Cell Volume ◽  
Average Daily Gain ◽  
Diagnostic Value ◽  
The Other ◽  
Gestation Period ◽  
Native Range ◽  
Daily Gain ◽  
Liver Storage

A study was conducted to evaluate the predictive diagnostic value of different copper (Cu) parameters as indicators of average daily gain (ADG) in growing calves. The effects in calves of cow Cu supplementation in the last one-third gestation period were also evaluated. Five supplementation trials, with a total of 300 calves, were carried out. Two groups of 30 calves were randomly assigned to each trial, one group was parenterally supplemented (SG) and the other was not supplemented (NSG). Trials began when calves were three-month-old and ended at weaning time. At each sampling calves were weighed and blood was taken to determine Cu concentrations in plasma, Whole Blood (WB), Red Cells (RC) and Packed Cell Volume (PCV). Liver samples from six animals of each group were taken both at the beginning and at the end of the trial. In two trials the mothers of the SG received Cu supplementation at the last one- third gestation period. Four of the five trials exhibited low ADG in the NSGs. In these groups, plasma Cu concentration decreased rapidly before low ADG was detected, which occurred with values remaining below 25µg/dl. The decrease of RC Cu concentration was considerably slow. WB showed an intermediate position. PCV in the SGs was higher than in the NSGs in all trials. Cow supplementation was insufficient to generate a liver storage able to last after calves reached the 3 months of age. These data could be useful to predict the risk of low ADG in grazing calves.

FACTITIAL HYPERKALEMIA DUE TO ICING BEFORE ANALYSIS

PEDIATRICS ◽  
1966 ◽  
Vol 38 (5) ◽  
pp. 900-902
Author(s):  
T. K. Oliver ◽  
G. A. Young ◽  
G. D. Bates ◽  
J. S. Adamo
Keyword(s):  
Blood Plasma ◽  
Cell Volume ◽  
Whole Blood ◽  
Potassium Concentration ◽  
Newborn Infants ◽  
Plasma Potassium ◽  
Mean Value ◽  
Red Cell ◽  
Red Cell Volume ◽  
The Mean

Both adult and newborn blood plasma potassium concentration rose significantly when whole blood was kept on ice for periods of 5 hours. This appears to be due to inhibition of red cell glycolysis. The rise in plasma potassium concentration of blood from newborn infants is significantly greater than that occurring in blood from adults; this difference is a function of the neonate's increased red cell volume. Meaningful interpretation of potassium concentration, particularly in the newly born, demands that the plasma be separated immediately. The plasma potassium concentration of normal newborns at birth does not differ significantly from adults; in this study the mean value in 20 infants was 4.81 mEq/l.

scholarly journals An investigation of the effects of intravenous administration of thiomolybdate on copper metabolism in chronic Cu-poisoned sheep

1981 ◽  
Vol 46 (3) ◽  
pp. 469-480 ◽  
Author(s):  
S. R. Gooneratne ◽  
J. McC. Howell ◽  
J. M. Gawthorne
Keyword(s):  
Cell Volume ◽  
Whole Blood ◽  
Packed Cell Volume ◽  
Copper Sulphate ◽  
Trichloroacetic Acid ◽  
Copper Metabolism ◽  
Osmotic Fragility ◽  
Soluble Form ◽  
Before And After ◽  
Copper Poisoning

1. Fourteen sheep were dosed repeatedly with a solution of copper sulphate (2 g/l) in order to induce chronic copper poisoning and four similar undosed animals acted as controls.2. Thiomolybdate (TM) was intravenously administered to all control sheep and to all except two of the test sheep. A variety of biochemical factors were studied before and after injections of TM.3. The direct-reacting Cu, whole-blood Cu and plasma Cu concentrations were elevated in animals given TM injections and at the ‘haemolytic crisis’ of untreated chronic Cu-poisoned animals. But most of the increased Cu observed on injecting TM was insoluble in trichloroacetic acid (TCA) and did not enter erythrocytes. The results indicate that uptake of Cu by erythrocytes is essential for haemolysis to occur and that for this to happen the Cu must be in a direct reacting, TCA-soluble form.4. Increased amounts of Cu were excreted in the urine at haemolysis and at the commencement of TM injections. High levels of direct-reacting Cu were found in plasma at these times.5. Marked changes were not found in caeruloplasmin activity, packed cell volume or the osmotic fragility of erythrocytes except at haemolysis. TM injections did not alter these factors in any of the sheep studied.

scholarly journals Effect of High Concentrations of Leukocytes on Whole Blood Viscosity

Blood ◽  
1971 ◽  
Vol 38 (3) ◽  
pp. 299-301 ◽  
Author(s):  
MARTIN H. STEINBERG ◽  
STANLEY E. CHARM
Keyword(s):  
Cell Volume ◽  
Blood Viscosity ◽  
Whole Blood ◽  
Packed Cell Volume ◽  
Leukocyte Count ◽  
Whole Blood Viscosity ◽  
High Concentrations ◽  
Normal Variability

Abstract Whole blood viscosity of patients with leukemic leukocytosis was compared to that of normals with a similar total packed cell volume (TPCV). Leukocytes in suspension were also studied and found to have a greater viscosity than erythrocytes. We found no relation between the magnitude of the leukocyte count and whole blood viscosity. The presence of anemia in the patients with leukemia prevented elevation of their TPCV. This, as well as the normal variability of blood viscosity obscured any increase that could have been produced by the greater viscosity of massed leukocytes.

Problems by Using Whole Blood in Heparin Measurements

1982 ◽  
Vol 47 (02) ◽  
pp. 177-181 ◽  
Author(s):  
Ingebrigt Talstad
Keyword(s):  
Cell Volume ◽  
Whole Blood ◽  
Packed Cell Volume ◽  
Partial Thromboplastin Time ◽  
High Accuracy ◽  
Activated Partial Thromboplastin Time ◽  
Clotting Time ◽  
Platelet Factor ◽  
Accuracy And Precision ◽  
Recalcification Time

SummaryProblems by using whole blood (WB) of various packed cell volume (PCV) in heparin measurements were studied. WB had to be used within 1 hr, due to influence of platelet Factor 4. The increase of Ca++ by increasing PCV, had a moderate influence by the assays studied. The recalcification time (RT) of WB was timeconsuming and had low accuracy and precision, due to different heparin response. The activated partial thromboplastin time (APTT) also had low accuracy and precision, due to different heparin response; the results were equal for WB and plasma. The thrombin clotting time (TCT) had high accuracy and precision in plasma. The TCT could also be used for WB since there was a good correlation between T20 (20 NTH U thrombin/ml) using WB, and T30 using plasma (r = 0.89, N = 61). The calcium thrombin clotting time (CaTCT) is not recommended for WB assaying.

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