Department
Chemical Pathology
Delphic Registration Code (Alpha Code)
PREE
Test Code (Numeric Code)
4546
Laboratory Handling
Sample Stability
48 hours 2-8°C
Synonyms
Placental growth factor ratio, Soluble fms-like tyrosine kinase-1
Turnaround Time
4 hours
Available 24 hours
Specimen Type
- Serum
Specimen Requirements
Tube/Container Type:
Preferred
- Plain (Red Top)
Preferred Sample Volume (ml)
4
Paediatric Specimen Requirements
Tube/Container Type:
Preferred
- Plain (Red Top)
Pre-testing Requirements
Requests must be made by SMOs/consultants only. See below for appropriate test indications (i.e. approval criteria). Test requests can be rejected if there are no clear clinical details/indications written on the blood request form or lacking the requesting SMO's details.
Pregnant women in >20 weeks gestation AND one of
- Systolic blood pressure ≥ 130 mmHg and/or diastolic blood pressure ≥ 80 mmHg
- Renal insufficiency, proteinuria, thrombocytopenia, liver dysfunction without hypertension
- Symptoms suggestive of preeclampsia e.g. headache, abdominal pain, epigastric pain or visual field disturbance
- When another alternate diagnosis is being considered e.g. SLE, underlying renal or liver disease
- Suspicion of fetal growth restriction
- One test (sFlt-1/PlGF ratio) per week per patient only
Last updated: 17/06/2026