Heparin skal gives i mindst 24 timer, helst i 48 – 72 timer, for at holde aPTT værdierne på 1, 5 til 2 gange det normale.
Heparin should be given for at least 24 hours, preferably for 48 - 72 hours, in order to keep aPTT values 1.5 to 2 times normal.