[E-Cigarettes - Operating Principle, Ingredients, and Associated Acute Lung Injury]

Area of Science:

• Pulmonology
• Toxicology
• Public Health

Background:

• In 2019, a severe lung injury outbreak, now known as EVALI (electronic cigarette, or vaping, product use associated lung injury), emerged in the US.
• Over 2,000 hospitalizations and 40 deaths were linked to e-cigarette use, primarily affecting young individuals.

Purpose of the Study:

• To provide a comprehensive overview of recent US literature on EVALI.
• To detail the case definition, epidemiology, clinical presentation, disease progression, and potential triggers of EVALI.
• To review the function of e-cigarettes, e-liquid ingredients, and associated inhalation risks.

Main Methods:

• Literature review of recent US-based studies on EVALI.
• Analysis of epidemiological data, clinical case reports, and toxicological information.
• Synthesis of information on e-cigarette function and e-liquid composition.

Main Results:

• EVALI is characterized by severe acute lung injury with a clear association with e-cigarette use.
• Key triggers are still under investigation, but certain additives in e-liquids are suspected.
• Understanding the pathophysiology and risk factors is crucial for patient management and prevention.

Conclusions:

• EVALI represents a significant public health concern associated with the growing use of e-cigarettes.
• Further research is needed to fully elucidate the causative agents and long-term health effects.
• Public health interventions and regulatory measures are essential to mitigate risks associated with vaping products.