What happens to anatomical dead space if a patient is mechanically ventilated through a tracheostomy tube?

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Placing a tracheostomy tube in the trachea below the larynx reduces the anatomical dead space because it bypasses all upper airways. Thus, for a given tidal volume, the alveoli would receive more ventilation than if the patient breathed normally through the upper airways. Endotracheal intubation also reduces anatomical dead space because the volume of the tube is much less than the volume of the upper airways.

What Happens to Anatomical Dead Space If a Patient Is