II. Devices: Nasal Catheter (Avoid)
- Flexible lubricated oxygen catheter
- Holes in distal 2cm
- Advanced through nostril into pharynx behind uvula
- Risk of Trauma to adenoids and secondary Hemorrhage
- Gastric distention or rupture if cannulate Esophagus
- No advantage when compared with Nasal Cannula
III. Devices: Oxygen Tent (Avoid)
- Clear Plastic shell encloses upper body
- Cannot reliably provide stable Oxygen Concentrations
- Although theoretically 50% Oxygen at high flows
- Room air drawn into tent whenever entered
- Tent Limits patient access
- Delivers <30% Oxygen at high flows