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Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
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Acute respiratory failure is a condition characterized by the inability of the lungs to perform their primary function: gas exchange. This failure leads to insufficient oxygen levels (hypoxemia) in the blood, elevated carbon dioxide levels (hypercapnia), or both, causing critical impairment in organ function.
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Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...
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Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
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Updated: Dec 3, 2025

Generation of Electronic Cigarette Aerosol by a Third-Generation Machine-Vaping Device: Application to Toxicological Studies
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Vaping-related lung injury.

Maxwell L Smith1, Michael B Gotway2, Laura E Crotty Alexander3

  • 1Department of Laboratory Medicine and Pathology, Mayo Clinic Arizona, Scottsdale, AZ, USA.

Virchows Archiv : an International Journal of Pathology
|October 27, 2020
PubMed
Summary
This summary is machine-generated.

E-cigarette or vaping product use-associated lung injury (EVALI) emerged in 2019, causing an epidemic of acute respiratory illness linked to vaping. This review details EVALI

Keywords:
E-cigarette or vaping product use-associated lung injuryElectronic nicotine delivery systemsPathologyVaping

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Area of Science:

  • Pulmonology
  • Pathology
  • Toxicology

Background:

  • Electronic nicotine delivery systems (ENDS) use has surged, leading to emergent lung conditions.
  • E-cigarette or vaping product use-associated lung injury (EVALI) presented as an epidemic in 2019.
  • Previous reports of lung disease associated with ENDS existed but did not reach epidemic levels.

Purpose of the Study:

  • To comprehensively review electronic nicotine delivery systems (ENDS).
  • To detail the etiology, clinical presentation, imaging, and pathology of EVALI.
  • To discuss treatment, long-term consequences, and the impact of EVALI on pathology.

Main Methods:

  • Literature review of electronic nicotine delivery systems and EVALI.
  • Synthesis of clinical, imaging, and pathological data.
  • Analysis of the impact on the practice of pathology.

Main Results:

  • EVALI is an acute respiratory illness strongly associated with vaping products.
  • Distinct clinical, imaging, and pathological features characterize EVALI.
  • Understanding EVALI's multifaceted aspects is crucial for patient care and pathology.

Conclusions:

  • EVALI represents a significant public health concern linked to ENDS.
  • Pathology plays a critical role in diagnosing and understanding EVALI.
  • Further research is needed on long-term EVALI effects and ENDS safety.