The best method of oxygen administration for client with COPD uses:
A. Cannula
B. Simple Face mask
C. Non-rebreather mask
D. Venturi mask
Correct Answer: D. Venturi mask
Venturi delivers controlled oxygen. An air-entrainment (also known as venturi) mask can provide a pre-set oxygen to the patient using jet mixing. As the percent of inspired oxygen increases using such a mask, the air-to-oxygen ratio decreases, causing the maximum concentration of oxygen provided by an air-entrainment mask to be around 40%.
Option A: A thin tube, often affixed behind the ears and used to deliver oxygen directly to the nostrils from a source connected with tubing. This is the most common method of delivery for home use and provides flow rates of 2 to 6 liters per minute (LPM) comfortably, allowing the delivery of oxygen while maintaining the patient’s ability to utilize his or her mouth to talk, eat, etc.
Option B: Facemasks can be generally divided into simple face masks, air-entrainment masks, and non-rebreathers. A simple facemask is a mask with no bag attached, which delivers oxygen at 5 to 8 LPM. A disadvantage of this and other full face masks is the inability of the patient to eat, drink, or easily communicate while using such a device.
Option C: Non-rebreathing masks have a bag attached to the mask known as a reservoir bag, which inhalation draws from to fill the mask through a one-way valve and features ports at each side for exhalation, resulting in an ability to provide the patient with 100% oxygen at a higher LPM flow rate.
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