,INDICATIONS FOR PROCEDURE: , The patient is a 55-year-old Caucasian male with a history of chronic obstructive pulmonary disease and O2 dependency of approximately 5 liters nasal cannula at home. 
,INDICATIONS FOR PROCEDURE : , The patient is a 55 - year - old Caucasian male with a history of chronic obstructive pulmonary disease and O2 dependency of approximately 5 liters nasal cannula at home .