Final answer:
Suctioning is required during oxygen and inhalation therapy to help patients clear respiratory secretions or obstruction when they cannot do so independently, ensuring effective breathing and oxygen intake.
Step-by-step explanation:
The need for suctioning during oxygen and inhalation therapy arises when a patient is unable to clear respiratory secretions or obstructions on their own. Suctioning is a procedure that can help maintain an open airway and ensure that a patient can breathe effectively.
It is often necessary in medical settings, particularly for those who have suffered from conditions causing excess mucus production or difficulty with natural clearance mechanisms.