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Posted by Richard Spafford on
Colin Sullivan looked for patients with sleep apnea. He wanted to experiment with them! They were hard to find at first. He couldn’t find any at the beginning. He sent up different models studying airway obstruction in animals and humans. The problem was how to measure airflow. They measured airflow by doing tracheostomy on dogs. He would occlude the airway and be able to test the airflow. At this time he was creating masks for dogs.