OSMOMAT 050 User Guide
Page 29 of 51
Version 1.1 (2011-10-12)
6.2 Sample Material
Any aqueous sample with macro molecules can be measured. In medical applications, the colloid
osmotic pressure of blood samples is measured.
To prevent coagulation, heparin should be added to the plasma sample. The dosage should be below
100 units/mL. "Excessive heparin concentrations as well as using other anticoagulative additives such
as EDTA or sodium citrate result in false high values for the colloid osmotic pressure.
To obtain the plasma, the blood should be centrifuged soon after collection and stored at 4°C in the
refrigerator."
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“Storage for up to 7 days is possible without significant changes to the colloid osmotic pressure. How-
ever, the sample should not be frozen”.
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The minimum sample volume required is 150 µL.
“The samples must be homogeneous and should have the same temperature as the measurement
device when measuring the colloid osmotic pressure. Cooled samples with a temperature difference of
almost 20°C compared to the measurement device exhibit significant differences when measuring the
colloid osmotic pressure”.
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6.3 Display of the OSMOMAT 050
The figure below shows labeled buttons and LEDs and serves to clarify the measuring procedure.
Please read this chapter completely before performing a measurement.
Figure 6-1: Display
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A. Grünert: Der kolloidosmotische Druck
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Marty, A T: Plasma oncotic variation and cardiopulmonary independence in normal humans
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A. Grünert: Der kolloidosmotische Druck
Содержание OSMOMAT 050
Страница 2: ......
