Which of the following is a visual indicator of adequate ventilation?

The indication of adequate ventilation is primarily observed through visual cues that reflect effective air exchange in the lungs. The rise and fall of the chest is a direct and observable sign that indicates the lungs are expanding and contracting properly, which is essential for effective breathing. When a patient is adequately ventilated, you will notice the rhythmic movement of the chest as air is inhaled and exhaled. This movement shows that the diaphragm and other respiratory muscles are functioning well to facilitate airflow.

Other mentioned indicators, such as skin pallor, excessive secretions, and rapid eye movement, do not specifically denote effective ventilation. Skin pallor might suggest poor oxygenation rather than good ventilation, while excessive secretions can obstruct the airways, impeding ventilation. Rapid eye movement is generally unrelated to respiratory status and does not provide information about lung function or breathing ability. Hence, observing the chest rise and fall is the most reliable visual indicator of adequate ventilation.