NREMT Paramedic Practice

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Which condition is NOT a cause of Respiratory Acidosis?

Pneumothorax
Overdose on stimulants
Atelectasis
Emphysema

The correct answer is: Overdose on stimulants

Respiratory acidosis occurs when the body accumulates too much carbon dioxide (CO2) due to inadequate ventilation. Conditions that hinder gas exchange or reduce the efficiency of ventilation can lead to this state. Pneumothorax, atelectasis, and emphysema all impair the lungs' ability to expel CO2 effectively, resulting in elevated levels in the blood. In contrast, an overdose on stimulants typically results in increased respiratory activity, which would lead to hyperventilation and potentially a respiratory alkalosis condition rather than respiratory acidosis. Stimulants can enhance the drive to breathe, thereby decreasing CO2 levels in the blood. Understanding the distinction between these conditions highlights the physiological mechanisms behind respiratory acidosis and the respiratory drive altered by stimulants.