How Do You Find the Costal Angle

The angle of the rib (costal angle) is the region where the rib is the most strongly bent located on on the proximal part of the body of the rib.

What angle should the costal angle be?

4. Costal angle. The angle formed by the blending together of the costal margins at the sternum. It is usually no more than 90 degrees, with the ribs inserted at approximately 45-degree angles.

How do you calculate costal margin?

The costal margin is the medial margin formed by the cartilages of the seventh to tenth ribs. It attaches to the manubrium and xiphoid process of the sternum. The thoracic diaphragm attaches to the costal margin. The costal angle is the angle between the left and right costal margins where they join the sternum.