Coagulation reference ranges: Difference between revisions

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(Updated D Dimer ranges to age-specific)
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|D DIMER
|D DIMER
|ug/L
|ug/L
|< 500
|<50 yrs          500
51-60yrs        600
61-70yrs        700
71-80yrs        800
>80yrs          900
|N/A
|N/A
|-
|-
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Reviewed June 2024
Reviewed August 2025

Revision as of 02:57, 7 November 2025

Parameter Units Normal range Therapeutic range
INR Ratio 0.8 - 1.2 2.0 - 3.0*
APTT Seconds 24-38 50 - 85 secs
FIBRINOGEN g/L 1.5-4.0 N/A
TCT Seconds 15 - 21 N/A
D DIMER ug/L <50 yrs 500

51-60yrs 600 61-70yrs 700 71-80yrs 800 >80yrs 900

N/A
FVIII iu/dl 50 - 150 N/A

*The INR therapeutic range may be higher for conditions such as heart valves, recurrent thromboembolism or arterial thromboembolism with associated antiphospholipid syndrome.


Reviewed August 2025