Cricothyroidotomy and tracheostomy are emergency procedures used to establish an airway when traditional methods like intubation are ineffective or contraindicated. Cricothyroidotomy involves creating an opening through the cricothyroid membrane below the larynx. It is indicated when upper airway obstruction prevents intubation. Tracheostomy involves surgically creating an opening directly into the trachea below the larynx. Both procedures allow for passage of air and can be life-saving but also carry risks of complications if not performed correctly. The document discusses techniques, indications, contraindications and complications for each procedure.