COAGULATION

ANALYTE

AGE RANGE

CRITICAL VALUE

UNITS

Fibrinogen

Any age

<100

mg/dL

Heparin, unfractionated

Any age

<0.1
>0.7

IU/mL
IU/mL

PTT

Any age

≥100

sec

PT INR

Any age

>5.0 INR

N/A

PT INR;
ISTAT (POCT)

Any age

>4.5

N/A