Detailed Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Q: Question: The obturator or catheter in a tracheostomy cannula serves to:
Options: <0> Introduce the external cannula into the tracheal stoma in a non traumatic way. <1> Aspirate secretions if a vacuum source is directly connected. <2> Help maintain the permeability of the artificial airway. <3> Fix the cannula avoiding its accidental displacement. <4> Allow the patient to speak by allowing the air to pass through the vocal cords.
A:
nursery