Causative factor in respiratory depression and arrest includes head trauma, stroke, brain tumors, and various drugs. What is the broad category?

Causative factor in respiratory depression and arrest includes head trauma, stroke, brain tumors, and various drugs. What is the broad category?

• A. Central nervous system dysfunction
• B. Cardiac arrhythmia
• C. Metabolic acidosis
• D. Pneumothorax

Answer: (A)

Breathing is controlled by the brainstem’s respiratory center, and its activity depends on intact central nervous system function. When the CNS is damaged or depressed—such as from head trauma, stroke, brain tumors, or drugs that slow brain activity—the brain’s drive to breathe diminishes. That reduction in central drive leads to hypoventilation, rising CO2, falling oxygen, and can progress to respiratory arrest if not corrected. These scenarios illustrate a single broad category: central nervous system dysfunction. Other options describe problems that don’t primarily alter the brain’s breathing control. Cardiac arrhythmias affect oxygen delivery to tissues; metabolic acidosis usually stimulates breathing to compensate rather than depress it; pneumothorax is a mechanical issue with the lungs/pleura, not a failure of the CNS to drive respiration.

Breathing is controlled by the brainstem’s respiratory center, and its activity depends on intact central nervous system function. When the CNS is damaged or depressed—such as from head trauma, stroke, brain tumors, or drugs that slow brain activity—the brain’s drive to breathe diminishes. That reduction in central drive leads to hypoventilation, rising CO2, falling oxygen, and can progress to respiratory arrest if not corrected. These scenarios illustrate a single broad category: central nervous system dysfunction.

Other options describe problems that don’t primarily alter the brain’s breathing control. Cardiac arrhythmias affect oxygen delivery to tissues; metabolic acidosis usually stimulates breathing to compensate rather than depress it; pneumothorax is a mechanical issue with the lungs/pleura, not a failure of the CNS to drive respiration.