16-Irrespirable_gases

Carbon Monoxide (CO)

A colorless, odorless, tasteless gas formed by incomplete combustion of carbonaceous materials.

Carboxyhemoglobin

Formed when carbon monoxide binds with hemoglobin, leading to anemic hypoxia.

Hyperbaric oxygen

Treatment for carbon monoxide poisoning, using oxygen at pressures greater than normal atmospheric pressure.

Hydrogen Sulphide (H2S)

A toxic, colorless gas with the smell of rotten eggs, causing asphyxiation by disrupting oxygen use.

Asphyxiants

Gases that lead to suffocation by interfering with oxygen delivery to tissues.

Signs and Symptoms of CO Poisoning at 10-20% COHb

Mild headache, lassitude, and breathlessness on moderate exertion.

Nerve Gases

Chemical agents that inhibit acetylcholinesterase, leading to increased acetylcholine and severe toxicity.

Chronic Exposure Symptoms of H2S

Headache, nausea, weakness, weight loss, ataxia, and respiratory issues.

Immediate Care for Carbon Monoxide Poisoning

Remove the patient to fresh air.

Vesicants or Blistering Gases

Chemical warfare agents that cause blistering of skin and mucous membranes.

Sternutators

Chemical agents that cause intense nasal and sinus irritation and sneezing.

Phosgene

A highly toxic gas, 4 times more toxic than chlorine, produced by oxidation of chlorinated hydrocarbons.

Chemical Analysis for COHb

Spectroscopy identifies carboxyhemoglobin by absorption bands in blood.

Methyl isocyanate (MIC)

A highly toxic liquid used in the production of pesticides, infamous for the Bhopal Gas Tragedy.

Supportive Measures in Treatment

Includes managing electrolyte imbalances and pulmonary edema.

Differential Diagnosis for CO Poisoning

Includes assessing for alcohol intoxication, uremia, hypoglycemic coma, and head injury.

Postmortem Findings of CO Poisoning

Cherry-red color in hypostasis and potential congestion in lungs and brain.