NURS 3270 Exam 2 Study Questions and Correct Answers

What is the amount of O2 a nasal cannula can deliver? - 1-6 L/min: 24%-44% - (low-flow device) - humidified if 4L *Prongs must curve downward to direct oxygen into lower airway What are the advantages of the nasal cannula? - Safe and simple - Easily tolerated - Effective for low concentrations - Does not impede eating or talking - Inexpensive, disposable What are the disadvantages of the nasal cannula? - Unable to use with nasal obstruction - Drying to mucous membranes - Can dislodge easily - May cause skin irritation or breakdown - Patient's breathing pattern will affect exact FIO2 What is the amount of O2 an Oxygen- reserving cannula "Oxymizer" can deliver? - 8 L/min: 30%-60% - (low-flow device) - no humidification needed What are the advantages of the Oxygen- reserving cannula "Oxymizer"? - Indicated for long-term O2 useing the home or nursing - facility Allows increased O2 concentrations and lower flow What are the disadvantages of the Oxygen- reserving cannula "Oxymizer"? - Cannula cannot be cleaned - More expensive than standard cannula What is the amount of O2 a simple face mask can deliver? - 6-12 L/min: 35%-50% - (low-flow device) - short term What are the advantages of the simple face mask? Useful for short periods of time such as patient transportation What are the disadvantages of the simple face mask? - Contraindicated for patients who retain CO2 - May induce feelings of claustrophobia - Therapy interrupted with eating or drinking What is the amount of O2 a Partial Non-rebreather can deliver? - 10-15 L/min: 60%-90% - (low-flow device) * inflate reservoir first *Bag should always remain partially inflated, so flow rate must be high enough to prevent collapse of bag What are the advantages of the Partial Non-rebreather? - Useful for short periods - Delivers increased FIO2 - Easily humidifies O2 - Does not dry mucous membranes What are the disadvantages of the partial non-rebreather? - Hot and confining - May cause skin irritation - Interferes with eating, drinking, and talking - Bag may twist and deflate What is the amount of O2 a Non-rebreather can deliver? **EMERGENCY USE - 10-15 L/min: 60%-100% - (low-flow device) What are the advantages of the Non-rebreather? - Valve closes during expiration, so exhaled air does not enter reservoir and mix with inhaledO2 - See partial nonrebreather What are the disadvantages of the non-rebreather? - Requires tight seal, difficult to maintain and uncomfortable - See partial non-rebreather above. What is the amount of O2 a venturi mask can deliver? - Prescribed liter and percentage flow - (High-flow device) What are the advantages of the venturi mask? - PERCISE - Provides specific amount of O2 What are the disadvantages of the venturi mask? Mask and humidity may irritate skin