Today our topic of discussion is Definition of terms.
Definition of terms
DEFINITION OF TERMS
FiO: Fraction of inspired oxygen (%).
PaCO: The partial pressure of CO, in arterial blood. It is used to assess the adequacy of ventilation.
PaO: The partial pressure of oxygen in arterial blood. It is used to assess the adequacy of oxygenation.
SaO: Arterial oxygen saturation measured from blood specimen.
SpO: Arterial oxygen saturation measured via pulse oximetry.
Heat moisture exchange (HME) product: are devices that retain heat and moisture minimizing moisture loss to the patient airway.
High flow: High flow systems are specific devices that deliver the patient’s entire ventilatory demand, meeting, or exceeding the patients peak inspiratory flow rate (PIFR), thereby providing an accurate FiO,.
Where the total flow delivered to the patient meets or exceeds their peak inspiratory flow rate the FiO, delivered to the patient will be accurate. High flow in approved areas only. Consult your NUM if unsure.
Humidification is the addition of heat and moisture to a gas. The amount of water vapor that a gas can carry increases with temperature.
Hypercapnia: Increased amounts of carbon dioxide in the blood.
Hypoxemia: Low arterial oxygen tension (in the blood).
Hypoxia: Low oxygen level at the tissues.
Low flow: Low flow systems are specific devices that do not provide the patient’s entire ventilatory requirements, room air is entrained with the oxygen, diluting the FiO.
Minute ventilation: The total amount of gas moving into and out of the lungs per minute. The minute ventilation (volume) is calculated by multiplying the tidal volume by the respiration rate, measured in liters per minute.
Peak inspiratory flow rate (PIFR): The fastest flow rate of air during inspiration, measured in liters per second.
Tidal volume: The amount of gas that moves in, and out, of the lungs with each breath, measured in milliliters (6-10 mL/kg).
Ventilation-Perfusion (VQ) mismatch: An imbalance between alveolar ventilation and pulmonary capillary blood flow.
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