Acute respiratory distress due to methane inhalation

Area of Science:

• Environmental Health
• Pulmonology
• Toxicology

Background:

• Inhalation of toxic gases is a known cause of pneumonitis.
• Methane gas intoxication is typically associated with loss of consciousness or asphyxia.
• Limited data exists on acute pulmonary toxicity following methane gas inhalation.

Purpose of the Study:

• To report a case of acute pulmonary toxicity after accidental methane gas inhalation.
• To describe the clinical presentation, diagnostic findings, and outcome.

Main Methods:

• A case report of a 21-year-old male with accidental methane gas exposure.
• Clinical assessment including respiratory distress, hypoxemia, and chest radiography.
• Mechanical ventilation and pulmonary function testing were performed.

Main Results:

• The patient presented with drowsiness and hypoxemia after a one-minute methane gas exposure.
• Chest imaging and symptoms were consistent with acute pneumonitis.
• Pulmonary function tests revealed a restrictive ventilatory defect post-exposure.

Conclusions:

• Acute pulmonary injury, including pneumonitis and restrictive ventilatory defect, can occur after brief methane gas inhalation.
• The lung injury in this case resolved spontaneously within 5 days without specific treatment or sequelae.