American Board of Surgery Qualifying Exam (ABS QE) Practice Test

What does TLC stand for in respiratory physiology?

1. Total lung capacity

2. Total left capacity

3. Transitional lung capacity

4. Transpulmonary lung capacity

The correct answer is: Total lung capacity

In respiratory physiology, TLC stands for Total Lung Capacity. This term refers to the maximum amount of air that the lungs can hold, which is the sum of all lung volumes, including the tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume. Understanding Total Lung Capacity is essential in assessing lung health and function, as it provides insights into various pulmonary conditions. Total Lung Capacity is a critical parameter measured in pulmonary function tests, helping clinicians to diagnose and monitor diseases such as obstructive and restrictive lung disorders. By understanding TLC, healthcare providers can better evaluate a patient's respiratory status and develop appropriate treatment plans. The other options do not accurately represent established concepts in respiratory physiology. Total left capacity is not a recognized term, nor are transitional lung capacity or transpulmonary lung capacity commonly used definitions in the field.