N307 LAB O2 therapy

Question 1

Describe the use of the following in a clinical setting:

Nasal Cannula

Answer 1

Nasal Cannula
This equipment is easily tolerated by most clients. It is also simpler than a mask. The fraction of inspired oxygen (F I 02) varies depending on the oxygen litre flow and the rate and depth of client breathing.
F I 02: 24-38% Flow: 1-2 L
F I 02: 30-35% Flow: 3-4 L
F 102: 38-44% Flow: 5-6 L

Question 2

Describe the clinical use of a Simple Face Mask

Answer 2

Simple Face Mask
This equipment requires fairly high oxygen flow to prevent rebreathing of carbon dioxide. About 75% of the inspired volume is room air drawn in through side holes in the mask. Accurate F I 02 is difficult to estimate.
F I 02: 35-65% Flow: 8-12 L

Question 3

Name two types of masks with reservoir bags and describe their use in clinical.

Answer 3

Mask with Reservoir Bag
The reservoir allows higher F I 02 to be delivered. At flows of less than 6 L/min, the risk of rebreathing carbon dioxide increases.

• Partial rebreathing mask: No inspiratory valve so that the beginning portion of exhaled air returns to the bag and mixes with the inspired air. Ports are present so that most expired air escapes. The reservoir bag remains one-third to one-half inflated. F I 02: 40-60% Flow: 6-10 L
• Nonrebreather: Valve closes during expiration so that exhaled air does not enter reservoir and is not rebreathed. Valves on mask side ports allow exhalation but close on inspiration to prevent inhalation of room air.

F I 02: 60-100% Flow: 6-15 L

Question 4

Dscribe the use of a Venturi Mask.

Answer 4

Venturi Mask
This system utilizes different sized adapters to deliver a fixed or predicted F I 02. The F I 02 is dependent upon litre flow and/or entrainment port size. It is used effectively on clients with COPD when accurate F I 02 is necessary. Carbon dioxide buildup is kept a minimum. Humidifiers always used. F I 02 is dependent upon litre flow and/or entrainment port size.
F I 02: 24-50%

Question 5

Describe the use of a Face Tent

Answer 5

Face Tent
This soft aerosol mask fits loosely around the face and neck. It is an alternative to an aerosol mask for clients who feel claustrophobic, but it is sometimes difficult to keep in place. It is convenient for providing humidification and oxygenation, however oxygen concentration cannot be controlled.
F I 02: 28-100% Flow: 8-12 L

Question 6

What is the difference between an oxygen hood and an oxygen tent?

Answer 6

Oxygen Hood
This disposable vinyl box fits over a child’s head to provide warm humidified oxygen at a controlled temperature.
F I 02: 28-40% Flow: 5-8 L
F I 02: 40-85% Flow: 8-12L
Less than 5 L flow may lead to carbon dioxide narcosis.

Oxygen Tent
This canopy encloses the child and is used to provide oxygen, humidification, and/or a cool environment to control temperature.
F I 02: up to 50% Flow: 10-15 L