Oxygen Mask Review

Question 1

Nasal Cannula (Concentration levels)

Answer 1

1L = 24%
2L = 28%
3L = 32%
4L = 33%
5L = 40%
6L = 44%

Question 2

Nasal Cannula (Things to be aware of)

Answer 2

• Patients can eat and cough with this device
• Humidify rates above 3L/min
• Relatively comfortable

Question 3

Simple face mask (Concentration levels)

Answer 3

5-10L/min = 40-60%

Question 4

Simple face mask (Things to be aware of)

Answer 4

• Flow rate must be above 5L/min to prevent CO2 back flow
• Masks are not easily tolerated because they fit tight
• Move the straps frequently

Question 5

Partial rebreather mask (Concentration levels)

Answer 5

6-15 L/min = 50-90%

Question 6

Partial rebreather mask (Things to be aware of)

Answer 6

• Allows higher FiO2 levels to be delivered
• Patient rebreathes some exhaled air along with O2
• Pre-fill bag before giving
• Maintain a higher flow to prevent bag from collapsing

Question 7

Non-rebreather mask (Concentration levels)

Answer 7

6-15 L/min = 70-100%

Question 8

Non-rebreather mask (Things to be aware of)

Answer 8

• The only mask capable of delivering up to 100% oxygen
• Must have a flow rate high enough to keep the reservoir at least one third to one half filled during inhalation
• (only delivers 75% in practice because mask is not airtight)

Question 9

Venturi mask (Concentration levels)

Answer 9

• 24-50%

Question 10

Venturi mask (Things to be aware of)

Answer 10

• Cone at the bottom allows for precise FiO2 to be delivered which is useful for patients with chronic lung disease
• Exhalation ports keep CO2 buildup to a minimum
• The valve tells you what rate corresponds to which amount of oxygen

Question 11

Face tent (Concentration levels)

Answer 11

8-12 L/min = 30-55% Fio2

Question 12

Face Tent (Things to be aware of)

Answer 12

• Less effective than a face mask for delivering precise numbers
• Allows for moderate to high density aerosol delivery for humidification
• Patients feel less claustrophobic

Question 13

Tracheostomy collar (Concentration levels)

Answer 13

4-10 L/min = 24-100%

Question 14

Tracheostomy collar (Things to be aware of)

Answer 14

• It is possible to deliver high humidity and high FiO2 with this collar
• A water trap is placed to prevent evaporation buildup
• Watch for water accumulation in the tubing

Question 15

T-Piece (Concentration levels)

Answer 15

4-10 L/min = 24-100% FiO2

Question 16

T- Piece (Things to be aware of)

Answer 16

• Oxygen and humidity are delivered into one side of the T and exhaled through the other side
• Make sure the oxygen tubing does not pull on the T-piece as this can pull off the tube