In emergency tracheostomy all structures are damaged except:: (A) Isthmus of thyroid, (B) Inferior thyroid aery, (C) Thyroid ima, (D) Inferior thyroid vein
Answer is B. Emergency tracheostomy can damage midline structures such as : thyroid isthmus, thyroid ima aery and inferior thyroid vein. Whereas, inferior thyroid aery lies laterally away from midline and so escapes injury.