ATI Gas Exchange and Oxygenation Practice Exam

When assessing respiratory excursion, the correct distance for the thumbs to be placed apart is approximately two inches. This measurement is essential because it provides a reliable assessment of the patient's chest expansion during breathing.

To perform this assessment, the examiner typically places their thumbs at the level of the 10th rib on the posterior thorax, with the hands positioned so that they can gauge the distance the thumbs separate as the patient inhales and exhales. A separation of about two inches indicates normal respiratory excursion, which reflects adequate lung expansion and overall respiratory function.

Measurements that are significantly smaller or larger than two inches may suggest abnormalities in lung capacity or chest wall movement, which could indicate conditions such as pneumonia, atelectasis, or muscular issues preventing full lung expansion. Thus, understanding that two inches is the standard helps in accurately interpreting the assessment results for effective patient care.