In emergency tracheostomy all structures are damaged except:
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.
Isthmus of thyroid
Inferior thyroid aery
Thyroid ima
Inferior thyroid vein
Neck Triangles and parotid gland