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Hematology & Coagulationsecondes

aPTT (Activated Partial Thromboplastin Time)

aPTT assesses the intrinsic pathway of blood coagulation to verify balanced hemostasis.

Common laboratory aliases and abbreviations:TCATemps de Céphaline ActivéeTemps de Céphaline KaolinTCKaPTTAPTT

Test your personal value

Enter the number from your lab report to instantly see how it compares to reference ranges.

secondes
31.5secondes
25
38
‹ LowRange: 25 – 38 secondesHigh ›

Physiological Reference Ranges

The ranges below represent standard adult physiological values. Your laboratory's printed reference range always takes precedence.

Adults (general)

25 – 38 secondes

Adult females

25 – 38 secondes

Adult males

25 – 38 secondes

Common alternative units:
ratio(×30 secondes)

What does a low result mean?

A slightly shortened time carries no adverse impact and reflects brisk clot formation.

What does a high result mean?

A modest lengthening may be caused by heparin treatment or temporary, harmless circulating antibodies.

Questions ready for your doctor

Bring these questions to your next consultation to discuss with your healthcare practitioner:

  • Is this clotting time suitable ahead of any planned dental or medical procedure?
  • Could any recent medication have affected this timing?
  • Should this be verified with a follow-up test?

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