Surveillance Webinar: Airborne Hazards: Surveillance and Clinical Considerations-Surveillance Webinar: Airborne Hazards Surveillance and Clinical Considerations PPT Slides

Surveillance Webinar: Airborne Hazards Surveillance and Clinical Considerations PPT Slides

Pdf Summary

This webinar, “Airborne Hazards: Surveillance and Clinical Considerations” (March 5, 2026), reviews how inhaled exposures cause disease and how they are monitored in occupational, environmental, and military/deployment contexts. It distinguishes occupational exposures (often higher-intensity, regulated, and involving identifiable agents) from environmental exposures (typically lower-intensity but affecting larger populations and involving complex mixtures). Airborne hazards are categorized as infectious (pathogen-containing aerosols) or non-infectious (gases, vapors, and particulates). Key physical concepts include forms of toxicants (dust, fume, mist, smoke, fog), particle size–dependent deposition throughout the respiratory tract, and how gas water solubility predicts the site of injury (high solubility causing upper-airway injury; low solubility causing delayed alveolar injury). Clinical severity follows concentration–time (dose–response) relationships and is modified by host factors.<br /><br />The session summarizes major monitoring and regulatory frameworks: OSHA workplace standards (PEL, STEL, TWA, ceiling limits; General Duty Clause), NIOSH guidance (REL, IDLH), and ACGIH TLVs. Surveillance is divided into hazard surveillance (industrial hygiene area/personal sampling, direct-reading instruments) and medical surveillance (spirometry, imaging, biologic testing), required for certain regulated exposures (e.g., silica, asbestos). Confined spaces require oxygen and toxic gas monitoring due to asphyxiant risks.<br /><br />Environmental monitoring is covered under the Clean Air Act and EPA’s NAAQS for six criteria pollutants (CO, Pb, NO₂, O₃, PM2.5/PM10, SO₂), communicated via the AQI. U.S. air pollutant concentrations have declined markedly since 1990, though health harms persist, especially for vulnerable groups.<br /><br />Clinically, inhalational toxicants are organized by mechanism: simple asphyxiants (oxygen displacement), chemical asphyxiants (e.g., CO, cyanide, H₂S), irritant gases (e.g., chlorine, ammonia, NO₂, ozone) and systemic toxicants. Associated syndromes include RADS/irritant-induced asthma, occupational asthma, bronchiolitis obliterans, hypersensitivity pneumonitis, and pneumoconioses; spirometric surveillance thresholds and examples are provided.<br /><br />Finally, the webinar applies these principles to deployment-related respiratory disease in Southwest Asia veterans (burn pits, dust storms, oil fires, exhaust). The VA’s Airborne Hazards and Burn Pits Center of Excellence and Post-Deployment Cardiopulmonary Evaluation Network promote standardized multidisciplinary evaluation using advanced PFTs, CT (including expiratory/quantitative analysis), labs, echocardiography, CPET, ENT/sleep assessments, and structured exposure histories to better diagnose conditions while minimizing unnecessary biopsy.

Keywords

airborne hazards

inhalation exposure

occupational exposure monitoring

environmental air pollution

OSHA PEL STEL TWA

NIOSH REL IDLH

ACGIH TLV

Clean Air Act NAAQS AQI

respiratory toxicology particle deposition

burn pits deployment-related respiratory disease