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Questions and Answers
What does FiO2 stand for in the context of oxygen therapy?
What does FiO2 stand for in the context of oxygen therapy?
- Full Oxygen Therapy Index
- Fixed Inspiratory Oxygen
- Fractional Inspired Oxygen Content (correct)
- First Inspired Oxygen Concentration
What is the primary purpose of the Oxymask?
What is the primary purpose of the Oxymask?
- To deliver oxygen effectively when other methods fail (correct)
- To monitor blood oxygen levels in real-time
- To administer a fixed amount of oxygen dosage
- To provide consistent low flow oxygen
What defines hypoxemia in a clinical context?
What defines hypoxemia in a clinical context?
- High partial pressure of oxygen in arterial blood
- Low amounts of oxygen in arterial blood (correct)
- Normal oxygen saturation in the bloodstream
- Inadequate oxygen delivery to tissues
How is PaO2 measured and what does it indicate?
How is PaO2 measured and what does it indicate?
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What are the characteristics of a Variable FiO2 device?
What are the characteristics of a Variable FiO2 device?
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Study Notes
Oxygen Therapy Definitions
- PaO2: Partial pressure of oxygen in arterial blood, measured in mmHg.
- FiO2: Fractional inspired oxygen content, the percentage of oxygen in the gas being measured. Atmospheric air has a FiO2 of 0.21, while pure medical oxygen has a FiO2 of 1.0.
- SpO2: Saturation of peripheral oxygen, the percentage of hemoglobin in the blood that is saturated with oxygen.
- Hypoxemia: Condition where arterial blood contains low amounts of oxygen (PaO2 less than 80 mmHg).
- Hypoxia: Condition where oxygen delivery to the tissues falls short of cellular needs.
Oxygen Delivery Devices
- Nasal Cannula: Delivers low flow oxygen via prongs inserted into the nostrils; Typical flow rate is 1 to 6 LPM, corresponding to an FiO2 of 0.24 to 0.44.
- Oxymask: Mask designed with a diffuser to concentrate and direct oxygen towards the mouth and nose; Can achieve high and variable FiO2.
Variable FiO2
- Variable FiO2: The FiO2 delivered can be adjusted to the patient's needs.
- Fixed FiO2: The FiO2 delivered is a set value and cannot be adjusted easily.
Oxymask
- Manufacturer: Southmedic Inc.
- Application: Used in hospitals when nasal cannula cannot achieve adequate oxygenation.
- Flow Rates: Respiratory therapist (RT) titrates the oxygen flow to achieve desired patient saturations.
- FiO2: Capable of high and variable FiO2.
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