Test Directory

Coagulation Screen

Containers - Adult

Green Cap Tube 3.0ml (Sarstedt)	Volume Range 3.0ml Additive per Container Sodium Citrate

Containers - Child

1.4ml citrate sarstedt monovette tube	Volume Range Additive per Container Sodium Citrate

Reference ranges

	Prothrombin Time (seconds)	APTT (secs)	Fibrinogen (g/L)
*Neonates Day1 - Day 4	8.2 - 14.1	29.0 - 51.5	1.5- 4.0
* Day5 -Day 21	8.2 - 14.1	28.0 - 55.0	1.5 - 4.0
*Day22 - Day 84	8.2 - 14.1	28.0 - 50.0	1.5 - 4.0
*Infants Day85 -Day 175	8.2 - 14.1	28.0 - 45.0	1.5 - 4.0
*Infants Day175 - Year 1	9.0 - 12.0	28.0 - 40.0	1.5 - 4.0
1 year - Adult	9.0 - 12.0	21.0 - 28.0	1.5 – 4.0

*Applies to term infants – preterm infants may have a different value.

Laboratory Site

RIE

51 Little France Crescent
Old Dalkeith Road
Edinburgh
EH16 4SA

Telephone: 0131 536 1000

SJH

Howden Road West
Howden
Livingston
West Lothian
EH54 6PP

Telephone: 01506 523000

WGH

Crewe Road South
Edinburgh
EH4 2XU

Telephone: 0131 537 1000

Transport arrangements

Samples should reach the laboratory as soon as possible, post collection.

Sample storage arrangements

Room Temperature

Special instructions for collection

The coagulation samples (green top) MUST be filled to the green line indicated on the tube.

How to request

TRAK / Request form

Availability

Mon - Fri Routine service 09:00 - 17:00. Sat / Sun Routine service 09:00 - 13:00. Please contact the laboratory for urgent samples outside of routine hours.

Anticipated turnaround

1 day.

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 an appropriate telephone or bleep number.

General additional information

The Coagulation screen comprises:

Prothrombin Time (PT)
Activated Partial Thromboplastin Time (APTT)
Fibrinogen (Clauss)

It is sometimes referred to as the Clotting Screen.

For information on the use of Monovettes, please click here - Monovette error flyer FINAL.doc