The indirect Coombs' test is done on a sample of the liquid part of the blood. It detects antibodies that are present in the bloodstream and could bind to certain red blood cells and destroy them. A Coombs' test involves taking a sample of blood.
It is placed in the middle of the chest or thoracic cavity (middle mediastinum), posterior to the body of sternum and the second to sixth costal cartilages and anterior to the fifth to the eighth thoracic vertebrae.
In the first type, the heart is located in the far right of the chest, in the similar position as that found on the left side. Whereas, in the other type, i.e., in case of dextrocardia with situs inversus, the heart in the right is the mirror image of the structure of the heart on the left side.