Here’s a comprehensive table summarizing all you need to know about Oxygen Index (OI) and Oxygen Saturation Index (OSI) for children:
Aspect
Oxygen Index (OI)
Oxygen Saturation Index (OSI)
Definition
A measure of lung function and oxygenation
A non-invasive alternative to OI
Formula
OI = MAP × FiO2 × 100 / PaO2
OSI = MAP × FiO2 × 100 / SpO2
Components
MAP: Mean Airway Pressure FiO2: Fraction of inspired oxygen PaO2: Partial pressure of arterial oxygen
MAP: Mean Airway Pressure FiO2: Fraction of inspired oxygen SpO2: Oxygen saturation measured by pulse oximetry
Measurement Method
Invasive (requires arterial blood gas)
Non-invasive (uses pulse oximetry)
Advantages
Gold standard for assessing severity of hypoxemic respiratory failure
Continuous monitoring, non-invasive, readily available at bedside
Disadvantages
Requires arterial line or frequent blood sampling
May be less accurate at very high or low SpO2 values
Correlation
–
Strong correlation with OI in neonates and children
Clinical Use
Assessing severity of hypoxemic respiratory failure and PPHN
Potential alternative to OI for continuous monitoring
Severity Classification
≤15: Mild HRF 16-25: Moderate HRF 26-40: Severe HRF >40: Very severe HRF
Can be derived from OI values
Therapeutic Decisions
Used for initiating therapies like inhaled nitric oxide and surfactant
May be used when arterial access is difficult
This table provides a comprehensive overview of Oxygen Index (OI) and Oxygen Saturation Index (OSI) for children, including their definitions, formulas, components, measurement methods, advantages, disadvantages, clinical uses, and severity classifications. It’s important to note that while OSI shows strong correlation with OI, it’s still being studied for its reliability in various clinical scenarios, especially in neonates and young children.