This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
In emergency tracheostomy all of the following structures are damaged, EXCEPT? 
Select and explain. 
A. Isthmus of the thyroid, B. Inferior thyroid aery, C. Thyroid ima aery, D. Inferior thyroid vein
B: Inferior thyroid aery
Answer: B: Inferior thyroid aery 
Explanation: Bleeding can occur immediately after a tracheostomy and in the late postoperative period. Sources of hemorrhage include granulation tissue in the stoma or trachea, and erosion of thyroid vessels or the thyroid itself, the tracheal wall (frequently from suction trauma), or the innominate aery. Inferior thyroid aery, a branch of the thyrocervical trunk of the subclan aery lies laterally away from midline, thus can escape injury.