Which of the following is a common sign of inadequate ventilation?

A common sign of inadequate ventilation is abnormal skin color, such as cyanosis. Cyanosis is a bluish discoloration of the skin and mucous membranes that occurs when there is insufficient oxygen in the blood. This can be a direct result of inadequate ventilation, as effective breathing is essential for delivering oxygen to the body and removing carbon dioxide. When ventilation is compromised, the body may not receive enough oxygen, leading to reduced oxygen saturation levels, which manifests as cyanosis.

Other signs of inadequate ventilation may include altered mental status, increased respiratory effort, or abnormal respiratory rates. In contrast, vocalizing clearly, having a rapid pulse rate, or demonstrating a consistent breathing pattern does not typically indicate inadequate ventilation. These signs may suggest alternative conditions but are not direct indicators of ventilation efficacy. For instance, a patient who can vocalize clearly is likely maintaining adequate airflow and oxygenation.