When an RT observes a reduction in chest expansion on the left side during palpation of a patient receiving ventilatory support, what should they do first?

When there is a reduction in chest expansion on one side of a patient receiving ventilatory support, the first action should be to compare breath sounds between each side of the chest. This step is essential for further evaluation of the underlying cause of the reduced expansion. By listening for breath sounds, the respiratory therapist can gather critical information regarding the presence of air movement in the lung fields and identify any abnormalities such as decreased air entry, which could indicate conditions like pneumothorax, pleural effusion, or atelectasis.

Assessing breath sounds provides immediate insights into respiratory function and can guide subsequent interventions. If abnormal sounds are noted, such as diminished or absent breath sounds on the affected side, it might suggest a more serious issue that requires urgent intervention. Therefore, comparing breath sounds is a logical and effective first step in assessing the patient’s condition to determine the most appropriate course of action.