Factor VIII (8) Assay

Test Code:

CG0124

Synonym(s):

Specimen Container

Sodium Citrate Tube

Specimen Requirement

Citrated Whole Blood

Adult: 2 mL

Paediatric and Neonate: 1 ml

- Gently invert the tubes several times to prevent clotting. Clotted specimen is not suitable for testing.

- To collect blood to the designate marking. Over or under filling will compromise the test results.

- When using a winged blood collection set for venipuncture and a coagulation tube is the first tube drawn, draw a discard tube first.

- When obtaining specimens from indwelling lines that may contain heparin, the line should be flushed with 5mL of saline; and the first 5mL of blood or 6-times the line volume (dead space volume of the catheter) be drawn off and discarded before the coagulation tube is filled.

- For those samples collected from a normal saline lock (capped off venous port) twice the dead space volume of the catheter and extension set should be discarded.

Specimen Storage / Transport

Send to laboratory as soon as possible after blood collection. Do not send in ice.

Method

Orderable as STAT?

Urgent tests requiring a shorter turnaround time can be requested by contacting the laboratory haematologist-on-call.

Turn Around Time

5 days

Reference Value(s)

Age Group	Gender	Reference Intervals (%)
Day 0-2	Both	105 - 329
Day 3 - 30	Both	83 - 274
1 Month - 1 Year	Both	54 - 145
1 - 5 Year	Both	36 - 185
6 - 10 Years	Both	52 - 182
11 - 16 Years	Both	59 - 200
Adults (above 16 Years)	Both	52 - 290
Adopted from Royal Children's Hospital, Melbourne, Australia.

Testing Laboratory Location

KKH

Laboratory

Haematology

Contact Number

6394 1373

Day and Time Performed

Wednesday (1300 hrs - 1700Hrs)
Friday (1300 hrs - 1700 hrs)

Orderable on CPOE?

Yes

Downtime Form

63170-Form-1080 Haematology Laboratory Downtime Form

Additional Information

For patients on HEMLIBRA® (Emicizumab), please order for Chromogenic FVIII.

Change History Notes

Others

Keywords

Factor VIII (8) Assay CG0124

TOP

Search Laboratory Tests

Search by Laboratories

Search Alphabetically

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

View all

What's New

Sort by :