Activated Partial Thromboplastin Time - aPTT - plasma
Back to main menuEurofins Biomnis code
TCA
Synonyms
- APTT
- TCK
- APTT, activated partial thromboplastin time
Clinic significance
Activated Partial Thromboplastin Time (aPTT) is the time taken for platelet-depleted, citrated plasma to coagulate in the presence of phospholipids (cephalin) and a contact activator (e.g. kaolin, celite, silica or ellagic acid).A prolonged aPTT can indicate deficiency in any of a number of contact coagulation-related factors (high molecular weight kininogen, prekallikrein or Factors XII or XI) or other factors (IX, VIII, X, V, II), or it can be due to very low levels of functional fibrinogen.
Prenalytics
- 2 mL
- Citrated Plasma
- FROZEN
Further information
- It is advisable to send us a frozen and centrifuged citrate sample in compliance with the GFHT pre-analytical recommendations.
- In case of investigation of a prolonged aPTT without further information, a measurement of factors VIII, IX, XI will be performed in addition to aPTT. In a pre-surgical context, investigation for circulating anticoagulant is limited to aPTT, aPTT patient + control, and calculation of the Rosner index.
- If possible, please specify if the patient is on an anticoagulant treatment as well as the clinical context.
Methodology
Chronometric method
Turnaround time
2 days
Pathologist(s) in charge
Biomnis Paris
Specialty
Haematology
Contact(s)
Dr Léna LE FLEM
Dr Bahya AMEYOUD
Dr Laurence GUIS
Dr Bahya AMEYOUD
Dr Laurence GUIS
E-mail(s)
Phone(s)
+331 49 59 17 44
+331 49 59 17 08
+331 49 59 15 01
+331 49 59 17 08
+331 49 59 15 01