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.
^My Answer The heart is located in the center of the chest. People thâ¦ink that it is in the left side of the chest, but in reality it is in the center - it is tilted slightly to the left - and the left side generates more pressure - hence the thinking that it is left side. Making the world better, one answer at a time. The heart is located in the mediastium thoracic cavity, slightly left of the midline. The heart is located in the mediastium thoracic cavity, slightly left of the midline.