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Questions and Answers
What pressures are required for the oxygen and medical air inputs in an oxygen blender?
What pressures are required for the oxygen and medical air inputs in an oxygen blender?
- 30 psi for both
- 50 psi for both (correct)
- 20 psi for oxygen and 60 psi for air
- 70 psi for oxygen and 30 psi for air
What is the primary reason for precisely controlling FiO2 when administering oxygen to infants?
What is the primary reason for precisely controlling FiO2 when administering oxygen to infants?
- Infants are less sensitive to oxygen levels compared to adults
- Infants can tolerate higher FiO2 levels than older patients
- Severe lung and eye damage can occur from high FiO2s (correct)
- Infants have a higher oxygen requirement than adults
How is the specific FiO2 created within the oxygen blender?
How is the specific FiO2 created within the oxygen blender?
- By using different pressures for oxygen and air
- By adjusting the temperature of the gases
- By positioning a metering valve to adjust the gas ratio (correct)
- By altering the flow rate of the blended oxygen
In which patient population is an oxygen blender primarily utilized?
In which patient population is an oxygen blender primarily utilized?
What triggers the pneumatic alarm in an oxygen blender?
What triggers the pneumatic alarm in an oxygen blender?
What does hypoxia refer to?
What does hypoxia refer to?
What is the FiO2 of atmospheric air?
What is the FiO2 of atmospheric air?
When is the Oxy Mask typically utilized in a hospital setting?
When is the Oxy Mask typically utilized in a hospital setting?
What does PaO2 measure?
What does PaO2 measure?
Which of these statements about FiO2 is true?
Which of these statements about FiO2 is true?
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Study Notes
Oxygen Blender
- A device that mechanically mixes high-pressure air and oxygen
- Creates a precise desired fraction of inspired oxygen (FiO2)
When is an Oxygen Blender used?
- Used for oxygen administration to infants
- Output of blender can be used with:
- Nasal cannula
- Oxyhood for infant
- Bag valve mask assembly
Why is a Precision Oxygen Blender Important?
- Infants are sensitive to high FiO2 levels
- High FiO2 levels can cause severe lung and eye damage
- Precisely controlling FiO2 is critical when providing oxygen therapy to infants
How Does an Oxygen Blender Work?
- Requires two compressed gas inputs:
- 50 psi oxygen
- 50 psi medical air
- Oxygen and air pass through two regulators
- Regulators ensure input pressures of oxygen and air are equal at 50 psi
- A metering valve creates a specific FiO2 by regulating the ratio of oxygen to air flow
- Blender is equipped with a pneumatic alarm that is activated when either compressed gas pressure falls below 50 psi
Definitions
- PaO2 is the partial pressure of oxygen in arterial blood, measured in mmHg.
- FiO2 is the fractional inspired oxygen content, or the percentage of oxygen in the gas being measured.
- SpO2 is the oxygen saturation level in the blood.
- Hypoxemia is defined as low amounts of oxygen within arterial blood (PaO2).
- Hypoxia is a condition where oxygen delivery to the tissues falls short of cellular needs.
- Fixed FiO2 refers to a constant FiO2 that does not vary with the patient's breathing pattern.
- Variable FiO2 varies with the patient's respiratory effort.
Oxygen Therapy
- Normal oxygenation is characterized by adequate oxygen levels in the blood.
- Hypoxemia is a condition where oxygen levels in the blood fall below normal.
- Oxygen therapy is the administration of supplemental oxygen to improve blood oxygen levels.
Oxygen Delivery Devices
- Nasal cannula: delivers a low flow of oxygen through two prongs placed in the nostrils.
- Oxymask: designed to deliver a high FiO2 of oxygen, but still variable.
- The Oxymask is designed around a diffuser which concentrates and directs oxygen towards the mouth and nose.
- The Oxymask is used in hospitals when adequate oxygenation cannot be achieved with a nasal cannula.
- Respiratory therapists (RTs) adjust the oxygen flow to achieve the desired patient saturation.
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