Question

Mr. Butinsky is using a nasal cannula at 3 lpm.  You receive an order to titrate Mr. Butinsky’s oxygen with exercise. Describe the specific equipment required to titrate his oxygen while exercising. (4 PTS)

3. Describe three ways to determine if a flowmeter is compensated.

(3 pts)

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4. Why is it necessary to “crack” a cylinder before attaching a regulator? (1 pt)

5. When would you need to choose a regulator with a Bourdon gauge flowmeter vs a Thorpe tube flowmeter? (1 pt)

When using an air entrainment mask, how is the FiO2 delivered to the patient affected in the following situations? Why? (3 pts)

Increase the flow 2 liters per minute above the recommended liter flow for that FiO2.

Decrease the flow 2 liters per minute below the recommended liter flow for that FiO2.

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​If the entrainment port is covered or obstructed.

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7. Why is a minimum flow rate of 5 lpm recommended for oxygen delivery by simple mask?

(1 pt)

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8. Explain the difference between a high-flow and a low-flow oxygen delivery system.

Give two examples of each. (3 pts)

9. List at least three patient factors that will affect the FiO2 delivered by a low-flow oxygen system. (3 pts)

10. You observe a patient wearing a non-rebreathing mask and note that the bag completely deflates with each inspiration. What, if any, actions should be taken? (1 pt)

11. Name the two types of electrochemical analyzers. List one similarity and one difference between the two. (3 pts)

Answer 1

An oximeter is used to titrate oxygen while exercising and at rest. It measures the level of oxygen present in the blood at anytime and can be used to determine the level of assistance needed. It measures the level of oxygen present in blood by sending small beams of lights through the skin and by observing the changes in the absorption of light.

3.

• Read the label on the flowmeter
• If the flowmeter is compensated, the float will jump when the cylinder is turned on first
• The flow will read 0, if the flowmeter is compensated when outflow of the gas is completely obstructed and the flow is turned to 8-10 lpm.

4. It is important to crack a cylinder before attaching it to the regulator so that any dirt or debris present is removed. This is done to prevent the dirt entering the regulator and causing an obstruction and to prevent fire due to an adiabatic process.