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High-speed bubble-segmented blood sampler for the rat.

M M Graham, G L Abbott

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |October 1, 1984
    PubMed
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    This study introduces a novel arterial blood sampler for conscious rats, enabling frequent, small sample collection. This device facilitates accurate pharmacokinetic and regional blood flow measurements in real-time.

    Area of Science:

    • Pharmacology
    • Physiology
    • Biomedical Engineering

    Background:

    • Accurate pharmacokinetic and regional blood flow measurements are crucial for drug development and physiological research.
    • Existing methods for arterial blood sampling in conscious animals can be invasive or provide insufficient temporal resolution.

    Purpose of the Study:

    • To describe a new arterial blood sampler designed for use in conscious rats.
    • To enable the collection of small, frequent blood samples for precise time-concentration curve analysis.

    Main Methods:

    • An apparatus for withdrawing small (10 microliter) whole-blood or plasma samples from an arterial catheter at rates up to 1/s.
    • Introduction of bubbles into the blood column at regular intervals to aid in sample management.
    • Mathematical correction for sample dispersion in polyethylene tubing, or avoidance of correction when analyzing the area under the time-concentration curve.

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    Main Results:

    • The sampler allows for the derivation of accurate arterial time-concentration curves within 60-120 seconds post-injection.
    • Small, frequent blood samples can be obtained, providing high temporal resolution.
    • The method is suitable for regional blood flow and pharmacokinetic studies.

    Conclusions:

    • The described arterial blood sampler is an effective tool for obtaining high-resolution pharmacokinetic data in conscious rats.
    • This apparatus simplifies the process of generating accurate time-concentration curves, essential for understanding drug disposition and regional blood flow.
    • The device offers a valuable advancement for preclinical research requiring precise blood sampling techniques.