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Related Experiment Videos

Epinephrine absorption after intratracheal administration.

B Chernow, P Holbrook, D S D'Angona

    Anesthesia and Analgesia
    |September 1, 1984
    PubMed
    Summary
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    Intratracheal epinephrine (EPI) effectively increases heart rate and blood pressure during cardiopulmonary resuscitation in primates. This study supports the clinical use of intratracheal EPI when intravenous access is not yet established.

    Area of Science:

    • Emergency Medicine
    • Pharmacology
    • Cardiovascular Physiology

    Background:

    • Intravenous access is often delayed during cardiopulmonary resuscitation (CPR).
    • Tracheal intubation is frequently performed before intravenous (IV) drug administration.
    • The efficacy of intratracheal drug delivery during CPR requires further investigation.

    Purpose of the Study:

    • To evaluate the effectiveness of intratracheal epinephrine (EPI) administration.
    • To assess hemodynamic responses and plasma catecholamine levels following intratracheal EPI.
    • To compare intratracheal EPI with saline in a primate model during simulated CPR.

    Main Methods:

    • A double-blind, randomized crossover study was conducted in 7 male baboons.
    • Animals received intratracheal epinephrine (1:10000) or saline (0.9% NaCl) on separate occasions.

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  • Plasma catecholamine levels, heart rate, and mean arterial blood pressure were measured over 30 minutes post-administration.

    • Main Results:

    • Intratracheal EPI significantly increased heart rate, mean arterial blood pressure, and plasma EPI levels within 1 minute.
    • These pressor effects persisted for 30 minutes.
    • No significant changes were observed after intratracheal saline administration.

    Conclusions:

    • Intratracheal epinephrine is rapidly absorbed and acts as an effective pressor agent in subhuman primates.
    • These findings support the clinical practice of administering intratracheal EPI during cardiac arrest or shock.
    • Tracheal administration offers a viable alternative route for EPI delivery when IV access is challenging.