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Related Experiment Videos

Whole blood osmolality.

B F Rocks, R A Sherwood, J G Cook

    Annals of Clinical Biochemistry
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Measuring plasma osmolality in whole blood samples offers a quicker, cheaper, and more efficient alternative to traditional plasma or serum methods. This approach provides reliable osmolality measurements without significant clinical differences.

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    Area of Science:

    • Clinical Chemistry
    • Laboratory Medicine
    • Biomedical Diagnostics

    Background:

    • Accurate plasma osmolality is crucial for diagnosing and managing various medical conditions.
    • Traditional methods often require plasma or serum, necessitating additional processing steps.

    Purpose of the Study:

    • To evaluate the feasibility and accuracy of measuring plasma osmolality directly from heparinised whole blood.
    • To compare the efficiency and cost-effectiveness of whole blood osmolality measurement against plasma-based methods.

    Main Methods:

    • Osmolality estimation using freezing point depression on both whole blood and plasma samples from hospital patients.
    • Analysis of factors such as cell volume and haemolysis to assess their impact on measurements.

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    Main Results:

    • No clinically significant differences were observed between osmolality measurements of whole blood and plasma from the same patient.
    • Neither cell volume nor haemolysis affected the accuracy of the osmolality measurements.
    • Whole blood measurements demonstrated reproducibility comparable to plasma determinations.
    • Whole blood osmolality measurement is faster, less expensive, and requires smaller specimen volumes.

    Conclusions:

    • Heparinised whole blood is a viable and efficient alternative matrix for plasma osmolality determination.
    • This method offers practical advantages in terms of speed, cost, and sample volume for clinical laboratories.