To Determine the Appropriate Depth an EMT Should Insert a Catheter

Multiple Choice

To determine the appropriate depth an EMT should insert a catheter tip into a tracheostomy tube in order to clear a blocked airway,the EMT should:

A) measure from the stoma to the carina.
B) measure against the length of the obturator.
C) insert the catheter until the tip is no longer visible.
D) multiply the internal diameter of the tracheal tube by 10.