Test Directory

Intrinsic Clotting Factor Assays

Containers - Adult

S-Monovette Citrate 9NC, 2.9 ml, cap green, diameter 13 mm
S-Monovette Citrate 9NC, 2.9 ml, cap green, diameter 13 mm
Additive per Container

Sodium Citrate

Containers - Child

S-Monovette Citrate 9NC, 1.4 ml, cap green, diameter 8 mm
S-Monovette Citrate 9NC, 1.4 ml, cap green, diameter 8 mm
Additive per Container

Sodium Citrate

Reference ranges

Intrinsic Clotting Factor Assays (Units: IU/mL)
 
FVIII (eight)
FIX (nine)
FXI (eleven)
FXII (twelve)
*Neonates Day1
0.5 – 1.78
0.15 – 0.91
 
 
*Neonates Day5
0.54 – 1.54
0.15 – 0.91
 
 
*Infants Day30
0.50 – 1.57
0.21 – 0.81
 
 
*Infants Day90
0.50 – 1.25
0.21 – 1.13
 
 
*Infants Day180
0.50 – 1.09
0.36 – 1.36
 
 
Adult
0.50 – 1.50
0.50 – 1.50
0.7 – 1.50
0.5 – 1.50
*Applies to term infants – preterm infants may have a different value.

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Laboratory Site

RIE
51 Little France Crescent
Old Dalkeith Road
Edinburgh
EH16 4SA
Telephone: 0131 536 1000

Transport arrangements

Specimen must be transported within a plastic sealable bag or other suitable container. Samples should be transported to the laboratory ASAP

How to request

Must be discussed and arranged with Haematology medical staff.

Availability

Monday - Friday: routine service 09:00 - 17:00. Saturday - Sunday: routine service 09:00 - 13:00
Please contact the laboratory for urgent samples outside of routine hours.

Anticipated turnaround

7 days

What happens if the result is positive or abnormal

The laboratory will telephone abnormal results where it appears that these are likely to be clinically significant. Please provide a telephone/ bleep number.

General additional information

The Intrinsic Clotting Factors comprise FVIII, FIX, FXI and FXII