Which sign indicates that a patient is not getting adequate ventilation?

Decreased oxygen saturation is a clear and significant indicator that a patient may not be receiving adequate ventilation. When ventilation is insufficient, the lungs are unable to effectively exchange oxygen and carbon dioxide, leading to a decrease in the level of oxygen in the bloodstream. Oxygen saturation levels are typically measured using a pulse oximeter, which provides a quick assessment of how well oxygen is being delivered throughout the body. A drop in these levels signifies that the patient’s breathing is inadequate and that their body's tissues may not be receiving the necessary oxygen, which can lead to serious complications if not addressed promptly.

In contrast, while an increased heart rate can suggest stress or discomfort, it is not a definitive sign of inadequate ventilation. Wheezing might indicate airway constriction or other respiratory issues but does not directly confirm poor ventilation. Normal skin color typically reflects adequate oxygenation, and therefore does not support the notion of inadequate ventilation in a patient.