Cough Reflex Test (CRT) Practice

Which of the following signs would indicate that a patient might be inadequately ventilated?

1. Consistent alertness

2. Normal heart rate

3. Hypoxemia

4. Stable blood pressure

The correct answer is: Hypoxemia

Hypoxemia is a clear indicator that a patient may be inadequately ventilated. When ventilation is not sufficient, the exchange of oxygen and carbon dioxide in the lungs becomes impaired, leading to low levels of oxygen in the bloodstream. This condition can manifest itself through symptoms like restlessness, confusion, or even decreased consciousness, all of which are associated with inadequate oxygenation. Monitoring oxygen saturation levels is crucial in assessing a patient's respiratory function, and hypoxemia serves as a direct warning sign that intervention may be necessary to enhance ventilation and restore adequate gas exchange in the lungs. In contrast, consistent alertness, a normal heart rate, and stable blood pressure do not inherently suggest inadequate ventilation, as these signs may remain stable even when a patient is facing respiratory challenges. Therefore, while these might indicate overall stability in a patient's condition, they do not provide specific insights into whether ventilation is adequate or compromised.