If the patient is capable of breathing fine with his or her home sleep apnea machine do not routinely trachea. Remember people with sleep apnea, when sleeping in ER will have extremely low stats without there machine. So do not automatically trachea, instead use ventilator until the family can bring there sleep apnea machine with headgear from home. .
Restricting air and oxygen by INSERTING AN UNSOLICITED and or small trachea tube, and or set with low flow settings kills many.
Over weight and obese require more air and often more oxygen.
Patients with pneumonia by using preset home sleep apnea machines settings are many times sufficient and can many times survive BETTER.