Oxygen Delivery Systems

Question 1

Nasal Cannula

Answer 1

• Most common delivery mode
• May / may not be supplemented with humidity
• Supports flow rates between 1 and 6 L/min
• 1 L O2 increases FiO2by 4%

*** Room air (20%), 1L (24%, 2L (28%), 3L (32%), 4L (36%), 5L (40%), 6L (44%)

Question 2

Facemask

Answer 2

• May / may not be supplemented with humidity
• Supports flow rates between 5 and 10 L/min
• Delivers oxygen at 35 –55% Fi02

Question 3

Trach Mask / Collar

Answer 3

• Humidified
• Delivers oxygen up to 40 –70% FiO2

Question 4

Why is humidity required with use of a trach collar but is not an absolute requirement for use with a face mask?

Question 5

Venturi Mask

Answer 5

• Variable adaptors enable selection of flow rates to influence FiO2
  
  • Adaptors provide more realistic approximation of FiO2
• Side ports on mask allow for addition of room air

Question 6

Non‐Rebreather Mask

Answer 6

• Provides high concentration of oxygen (90 –100% FiO2)
• One way valve separates mask from bag
  
  • Oxygen delivered to bag
  • Exhalation does not enter bag

Question 7

High Flow Nasal Cannula

Answer 7

• Provides high flow rate (25 ‐60 L/min) well above patient’s peak inspiratory rate
• Delivers specific FiO2
• Offers additional respiratory support through positive expiratory pressure (PEP) and elimination of CO2

Question 8

Positive Airway Pressure

Answer 8

• Continuous positive airway pressure assists in splinting airways open
• Bilevel(BiPAP)
  
  • Settings can be adjusted separately for inhalation and exhalation
• Continuous (CPAP)
  
  • Settings fixed for inhalation and exhalatio

Question 9

Mechanical Ventilation

Answer 9

• Provides support to those with impending or existing respiratory failure or those in need of airway protection
• Delivered via nasal or oral endotracheal tube (ETT) or via tracheostomy
• ETT for short‐term management
• Tracheostomy for long‐term suppor

Question 10

Major Ventilator Settings and Modes

Answer 10