👉 The term "posttracheal" refers to a medical procedure where an endotracheal tube is inserted into the trachea (windpipe) through the mouth. This allows for the delivery of oxygen and other gases, such as carbon dioxide, directly from the lungs to the body's cells without the need for a breathing tube or external airway. Posttracheal tubes are often used in patients undergoing procedures such as lung cancer treatment, surgery, or chemotherapy, where the risk of