Von Willebrand Screen (Blood)

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Testing Laboratory

Counties Manukau | Middlemore Hospital

Department

Haematology

Delphic Registration Code (Alpha Code)

AAAA

Test Code (Numeric Code)

0000

Laboratory Handling

Phlebotomy

Tube must be filled up to the "Fill Line"

Transport

Do not send the sample via the Lamson system (hand deliver)

Separating

If the sample has been spun for clotting screen, then it cannot be used for PFA

Laboratory

Sample must be processed within 4 hours of collection and kept at room temperature at all times.

Sample Stability

PR and APTT - 12 hours at room temperature; Fibrinogen - 24 hours ar room temperature; PFA 4 hours at room temperature; Factor VIII - 4 hours at room temperature or may be frozen if testing is delayed; sendaway tests to LabPlus - sample must be frozen within 4 hours

Synonyms

Collagen Binding Assay

Turnaround Time

1 hour

Tests performed at MMH (available 24 hours). Sendaway tests performed at LabPlus TAT within 2 weeks.

Specimen Type

  • Plasma

Specimen Requirements

Tube/Container Type:

Preferred
  • Citrate (Light Blue Cap)
Preferred Sample Volume (ml)

2.7

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • Citrate (Light Blue Cap)

Additional Specimen Information

1mL paediatric tubes are available from the Laboratory (Coagulation Section) and must be filled up to the "Fill-Line"

Last updated: 09/04/2026