How are retractions defined during the respiratory process?

Retractions are defined as the inward movement of the chest wall during inspiration, which occurs when there is increased effort required for breathing. This phenomenon typically indicates that a person is struggling to inhale effectively, often due to a narrowed airway or respiratory distress.

When retractions are observed, it can signify that the body is using accessory muscles and relying on negative pressure to draw air into the lungs due to obstruction or other respiratory issues. The inward movement seen at various sites, such as the intercostal spaces or supraclavicular area, indicates that the normal mechanics of breathing are compromised.

Understanding this concept is crucial for assessing respiratory function and identifying potential medical issues that may require immediate intervention.