Amniotic Fluid Index Calculator

Overview

Sums the deepest vertical fluid pocket in each of four uterine quadrants.

Clinical Significance

Commonly, ≤5 cm suggests oligohydramnios and ≥24–25 cm suggests polyhydramnios; apply local gestation-specific guidance.

When to Use

• Use as structured clinical decision support when the required data are available and reliable.

How It Is Calculated

• The displayed variables are combined using the published equation, decision rule or weighted point system.

Interpretation

• Commonly, ≤5 cm suggests oligohydramnios and ≥24–25 cm suggests polyhydramnios; apply local gestation-specific guidance.

Worked Example

Enter verified patient data in the displayed units; MedicalC applies the published model.

Limitations

• Risk and classification tools can be misapplied outside their validated population.
• Missing, estimated or non-contemporaneous data may materially change the result.

Clinical Pearls

• Document the inputs, units, date and clinical setting with the result.
• Use serial scores only when the same instrument and measurement method are used consistently.

Common Mistakes

• Using the tool without confirming entry criteria.
• Using approximate or incorrectly converted values.
• Treating a prognostic score as a standalone treatment decision.

References

1. Phelan JP et al. J Reprod Med. 1987;32:540-542. — Primary or supporting reference for the implemented model.