Surfactant Dose by Gestational Age and Weight

Calculate surfactant dosing for respiratory distress syndrome in preterm neonates based on body weight, gestational age, and surfactant preparation (poractant alfa, beractant, calfactant).

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate surfactant dosing for respiratory distress syndrome in preterm neonates based on body weight, gestational age, and surfactant preparation (poractant alfa, beractant, calfactant)

Each component has a specific meaning:

  • Body weight — The body weight recorded for the scenario being assessed.
  • Gestational age — The gestational age recorded for the scenario being assessed.
  • Surfactant preparation (poractant alfa — The surfactant preparation (poractant alfa recorded for the scenario being assessed.
  • Beractant — The beractant recorded for the scenario being assessed.
  • Calfactant) — The calfactant) recorded for the scenario being assessed.

Note: Interpret the surfactant dose result against the thresholds and context described above.

How to Use

Enter the body weight, gestational age, surfactant preparation (poractant alfa, beractant, calfactant) for the scenario you are assessing. Calculate surfactant dosing for respiratory distress syndrome in preterm neonates based on body weight, gestational age, and surfactant preparation (poractant alfa, beractant, calfactant). Use the surfactant dose result to inform your calculation.

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