The Activated Partial Thromboplastin Time (APTT) measures the activity of the intrinsic and common pathways of the coagulation cascade.
Tube
Coagulation Tube (Blue)
05 (CP) – Citrate
ID
12614
Availability
Daily 24/7
Additional Information
Usually requested as part of a coagulation screen including a Prothrombin time and Fibrinogen level. Please note: test can only be added to samples within 24 hours of collection.
Turnaround Time
A&E: 1 hour
Day Case: 6 Hours
In-Patient: 6 Hours
Out-Patient: 24 Hours
GP: 24 Hours
Sent To
Blood Sciences Cross Site
Contact
For further details please contact Leeds Pathology customer services: [email protected].
Collection Con
1 x Citrate tube must be filled to the fill line please.
Instructions for Lab Staff: Standard lab processing- No special requirements.
Sample Type
Blood
Sample Storage
Room Temperature (18-25°C) for 48 hours
Reference Range
Male: 23.5-37.5 seconds
Female: 23.5-37.5 seconds
Reference Range Notes
Please note these are adult reference ranges and may not apply to patients less than 12 months old.
Interpretation of results must always be done in the light of the clinical setting.
Units
Seconds
IP Acute TAT
1 Hour
IP Routine TAT
6 Hours
GP Acute TAT
N/A
GP Routine TAT
24 Hours