Parasternal line

Parasternal line

The parasternal line is an important anatomical reference point used in medicine to locate structures within the thorax. It is a vertical line that runs parallel to the sternum, specifically on the left and right sides of the sternum. The parasternal line is commonly used in clinical practice for various procedures and assessments involving the chest cavity.

Anatomy

The parasternal line is located approximately 1-2 cm lateral to the edge of the sternum. It extends vertically from the sternal notch at the top of the sternum to the xiphoid process at the bottom. The line is divided into two parts: the left parasternal line and the right parasternal line, corresponding to the left and right sides of the sternum, respectively.

Clinical Significance

The parasternal line serves as a valuable reference point for healthcare professionals when performing procedures such as thoracentesis, where a needle is inserted into the pleural space to drain fluid or air. Additionally, the parasternal line is used to guide the placement of chest tubes for drainage in cases of pneumothorax or pleural effusion.

In cardiac examination, the parasternal line is used to locate the point of maximal impulse (PMI), which corresponds to the apex of the heart. By palpating along the parasternal line, healthcare providers can identify abnormalities in heart size and position.

Related Articles

• Sternal angle
• Xiphoid process
• Thoracentesis
• Pneumothorax
• Pleural effusion
• Point of maximal impulse

‎