1 - Scheme Overview

This external quality assessment scheme assesses the accuracy of the assay of 3 serum markers used in the screening and monitoring of preeclampsia: sFlt1 (Soluble fms-like tyrosine kinase-1), PAPP-A (Pregnancy-associated plasma protein A) and PlGF (Placental growth factor).

2 - Assessment Frequency

Number of surveys per year: 4
Number of control samples per survey: 1 or 2
Number of samples per year: 7

3 - List of Analytes Assessed 

• sFlt1 (Soluble fms-like tyrosine kinase-1)
• PlGF (Placental growth factor)
• sFlt-1/PlGF Ratio
• PAPP-A (Pregnancy-Associated plasma protein A)

4 - Description of the Control Samples

Human or animal origin control serums in lyophilized form (samples to be resuspended in 1 or 2 mL of distilled water).