An oxygen delivery system is prescribed for a male client with chronic obstructive pulmonary disease to deliver a precise oxygen concentration. Which of the following types of oxygen delivery systems would the nurse anticipate to be prescribed?
A. Face tent
B. Venturi mask
C. Aerosol mask
D. Tracheostomy collar
Correct Answer: B. Venturi mask
The Venturi mask delivers the most accurate oxygen concentration. It is the best oxygen delivery system for the client with chronic airflow limitation because it delivers a precise oxygen concentration. 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%. The face tent, aerosol mask, and tracheostomy collar are also high-flow oxygen delivery systems but most often are used to administer high humidity.
Option A: Face tents are used to provide a controlled concentration of oxygen and increase moisture for patients who have facial burn or a broken nose, or who are claustrophobic. The mask covers the nose and mouth and does not create a seal around the nose. It can provide 28% to 100% O2 Flow meter should be set to deliver O2 at a minimum of 15 L/min. It is difficult to achieve high levels of oxygenation with this mask.
Option C: A mask used for the therapeutic administration of a nebulized solution, humidity, or high airflow with oxygen enrichment. It has a large-bore inlet and an exhalation port. When the required concentration needs to change during oxygen therapy, the adult aerosol mask, with the choice of 6 venturis or a multi venturi mask kit will offer the choice to suit the individual patient’s requirements. The aerosol mask can be used with a nebuliser or 22mm corrugated tubing for combined oxygen therapy and humidification.
Option D: One is to use a tracheostomy collar, which is placed over a breathing tube in a tracheotomy incision in the throat, and through which humidified oxygen is given. The other is to reduce the pressure support supplied via the ventilator. A study found tracheostomy collars significantly outperformed pressure support in helping patients breathe on their own again.
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