CIRCUMFERENTIAL OXYGEN DELIVERY

Respirators for artificial respiration; Respirators for filtering air for medical purposes; Continuous positive airway pressure (CPAP) masks; Filters for continuous positive airway pressure (CPAP) devices; Tubing for use with continuous positive airway pressure (CPAP) devices; Pillows adapted for use with continuous positive airway pressure (CPAP) devices; Headgear adapted for use with continuous positive airway pressure (CPAP) masks; Medical apparatus, namely, continuous positive airway pressure (CPAP) devices; Oxygen masks for medical use; Oxygen masks for medical purposes; Oxygen concentrators for medical purposes; Oxygen concentrators for medical applications; Patient breathing system comprising a breathing circuit, connections to patient, ventilator, scavenger, fresh gas delivery circuit and carbon dioxide absorber