Parasternal line

Parasternal Line

The Parasternal Line (pronunciation: /ˌpærəˈstɜːrnəl laɪn/) is a vertical line on the chest wall that runs parallel to the sternum.

Etymology

The term "Parasternal" is derived from the Greek words "para" meaning beside, and "sternon" meaning chest or breastbone. Thus, "Parasternal" refers to the area beside the sternum.

Definition

The Parasternal Line is an imaginary vertical line used in anatomical terminology and clinical procedures to describe locations on the chest wall. It is drawn beside the sternum, between the sternum and the midclavicular line.

Clinical Significance

The Parasternal Line is used as a reference point in physical examinations and medical procedures. For example, the second intercostal space, which is located at the level of the Parasternal Line, is a common site for needle decompression in the treatment of a pneumothorax.

Related Terms

Midclavicular Line: An imaginary vertical line running down the middle of the clavicle, used as a reference point in physical examinations and medical procedures.
Midaxillary Line: An imaginary vertical line running down the middle of the axilla (armpit), used as a reference point in physical examinations and medical procedures.
Pneumothorax: A condition in which air accumulates in the pleural space, causing the lung to collapse.