A comparison of the effects of a 4% modified fluid gelatin and a 6% hydroxyethyl starch on haemodilution, colloid osmotic pressure, haemostasis and renal parameters in healthy ponies

2016 ◽  
Vol 49 (3) ◽  
pp. 363-368 ◽  
Author(s):  
Z. Gratwick ◽  
A. Viljoen ◽  
P. C. Page ◽  
A. Goddard ◽  
G. T. Fosgate ◽  
...  
Keyword(s):  
Osmotic Pressure ◽  
Hydroxyethyl Starch ◽  
Colloid Osmotic Pressure ◽  
Modified Fluid Gelatin

Comparison of three plasma expanders used as priming fluids in cardiopulmonary bypass patients

Perfusion ◽  
1998 ◽  
Vol 13 (5) ◽  
pp. 297-303 ◽  
Author(s):  
Izaak Tigchelaar ◽  
Rolf CG Gallandat Huet ◽  
Piet W Boonstra ◽  
Willem van Oeveren
Keyword(s):  
Cardiopulmonary Bypass ◽  
Osmotic Pressure ◽  
Hydroxyethyl Starch ◽  
Half Life ◽  
Human Albumin ◽  
Colloid Osmotic Pressure ◽  
Low Molecular Weight ◽  
Postoperative Phase ◽  
Total Blood ◽  
Plasma Substitute

Ten per cent low molecular weight hydroxyethyl starch is a plasma substitute only recently used as priming solution in an extracorporeal circuit, in contrast to human albumin and gelatin. To evaluate the effect of priming solutions on haemodynamics and colloid osmotic pressure, we studied 36 patients elected for cardiopulmonary bypass (CPB). They were randomly assigned to 2.5% hydroxyethyl starch, 3% gelatin or 4% human albumin priming solution. Total blood loss (perioperative + intensive care unit period) was higher in the gelatin group than in the albumin and hydroxyethyl starch groups. During CPB, the colloid osmotic pressure was best preserved in the gelatin group, although no excessively low colloid osmotic pressures were measured in the other two groups. Due to the extended half-life and the additional postoperative colloid administration, the hydroxyethyl starch group had a higher colloid osmotic pressure in the postoperative phase. We conclude that, next to human albumin, 2.5% hydroxyethyl starch is a safe CPB priming solution additive and is effective as plasma substitute. Its somewhat longer half-life requires adaptation of the routine protocol for transfusion of colloids and blood products.

Colloid osmotic pressure changes of dog's blood exposed to different mixtures of CO2 and air

1978 ◽  
Vol 44 (2) ◽  
pp. 254-257 ◽  
Author(s):  
Y. Kakiuchi ◽  
A. B. DuBois ◽  
D. Gorenberg
Keyword(s):  
Red Blood Cells ◽  
Osmotic Pressure ◽  
Cell Volume ◽  
Blood Cells ◽  
Freezing Point ◽  
Colloid Osmotic Pressure ◽  
Red Cell ◽  
Freezing Point Depression ◽  
Pressure Changes ◽  
Different Levels

Hansen's membrane manometer method for measuring plasma colloid osmotic pressure was used to obtain the osmolality changes of dogs breathing different levels of CO2. Osmotic pressure was converted to osmolality by calibration of the manometer with saline and plasma, using freezing point depression osmometry. The addition of 10 vol% of CO2 to tonometered blood caused about a 2.0 mosmol/kg H2O increase of osmolality, or 1.2% increase of red blood cell volume. The swelling of the red blood cells was probably due to osmosis caused by Cl- exchanged for the HCO3- which was produced rapidly by carbonic anhydrase present in the red blood cells. The change in colloid osmotic pressure accompanying a change in co2 tension was measured on blood obtained from dogs breathing different CO2 mixtures. It was approximately 0.14 mosmol/kg H2O per Torr Pco2. The corresponding change in red cell volume could not be calculated from this because water can exchange between the plasma and tissues.

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