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The Motivation for Alcohol Reward: Predictors of Progressive-Ratio Intravenous Alcohol Self-Administration in Humans

The Motivation for Alcohol Reward: Predictors of Progressive-Ratio Intravenous Alcohol Self-Administration in Humans

Published on: April 28, 2022

Paradigm shift for the alcohol breath test.

Michael P Hlastala¹

¹Division of Pulmonary and Critical Care Medicine, Box 356522, University of Washington, Seattle, WA 98195-6522, USA. hlastala@u.washington.edu

Journal of Forensic Sciences

|January 15, 2010

Summary

The alcohol breath test (ABT) is unreliable for measuring blood alcohol content. Dynamic alcohol exchange in airways means breath tests do not accurately reflect alveolar alcohol concentration, requiring assessment of physiological factors.

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Area of Science:

Forensic Science
Physiology
Analytical Chemistry

Background:

The alcohol breath test (ABT) has been a standard tool for over 50 years to detect ethyl alcohol in individuals suspected of driving under the influence.
Current ABT methodology relies on an outdated model assuming a direct correlation between end-exhaled breath alcohol concentration and alveolar air alcohol concentration.

Observation:

Experimental research and mathematical modeling were employed to evaluate the pulmonary exchange processes of ethyl alcohol.
Studies reveal that alcohol dynamically exchanges with airway tissues during both inhalation and exhalation.

Findings:

The dynamic interaction between alcohol and airway tissue prevents the delivery of air with true alveolar alcohol concentration to the mouth.
This physiological exchange invalidates the assumption that end-exhaled breath alcohol concentration accurately represents alveolar alcohol concentration.

Implications:

The accuracy of alcohol breath tests is significantly influenced by physiological factors.
Rethinking ABT methodology is crucial, necessitating the assessment of individual physiological variables for more precise ethyl alcohol quantification.