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Carbon Monoxide Toxicity Mechanism and Diagnosis

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Carbon Monoxide Toxicity Mechanism and Diagnosis

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Questions and Answers

What is the primary mechanism of carbon monoxide toxicity?

It directly damages mitochondria, preventing ATP production.

It causes smooth muscle contraction, leading to tissue hypoxia.

It induces cyanosis by binding to cytochrome oxidase.

It binds to hemoglobin with higher affinity than oxygen, interfering with cellular respiration. (correct)

Which of the following is a characteristic sign of carbon monoxide poisoning?

Blue discoloration of the skin and mucous membranes.

Severe muscle spasms and seizures.

Cherry-red coloration of the blood. (correct)

Rapid onset of respiratory failure.

Which of the following is NOT a potential effect of chronic, low-level carbon monoxide exposure?

Hemolytic anemia. (correct)

Increased risk of heart disease.

Memory disturbances.

Tiredness and lethargy.

Which of the following is the recommended treatment for severe carbon monoxide poisoning?

Hyperbaric oxygen therapy. (C) Signup and view all the answers

Which of the following is a potential complication of carbon monoxide exposure during pregnancy?

Teratogenic effects on the fetus. (D) Signup and view all the answers

Which of the following symptoms is associated with severe carbon monoxide poisoning?

Hypotension and syncope. (C) Signup and view all the answers

What is the mechanism of carbon monoxide toxicity at the mitochondrial level?

Binds to cytochrome oxidase (D) Signup and view all the answers

Why does carbon monoxide poisoning lead to hypoxemia but no cyanosis?

It prevents oxygen from binding to hemoglobin (B) Signup and view all the answers

What is the most common symptom associated with chronic low-level carbon monoxide exposure?

Memory disturbances (D) Signup and view all the answers

Which symptom is pathognomonic for carbon monoxide poisoning?

Cherry red blood (D) Signup and view all the answers

Why should hyperbaric chambers be used in the treatment of CO poisoning?

To reduce CO-Hb levels in the blood (B) Signup and view all the answers

What is a key characteristic of moderate carbon monoxide poisoning?

Blurred vision and ataxia (A) Signup and view all the answers

How does carbon monoxide affect cellular respiration?

Interferes with cytochrome oxidase (B) Signup and view all the answers

What distinguishes severe carbon monoxide poisoning from mild and moderate cases?

'Myocardial ischemia' and 'severe drowsiness' (A) Signup and view all the answers