We use cookies to help us improve the website and your experience using it. You may delete and block all cookies from this site at any time. However, please note this may result in parts of the site no longer working correctly. If you continue without changing your settings we will assume you are happy to receive all cookies on this site.

Close

Guidelines for heparin dosage - SC

Here are the Haematology department's guidelines for SC heparin dosage for heparinisation for thrombotic conditions.

For S C Heparin 250 iu/kg b.d. [200 for females > 60yrs]. Take specimen four to six hours post injection.

 

APTT ratio Dose adjustment Repeat APTT
<1.5 +2,500 units b.d. Next Morning
1.5-2.0 +1.250 units b.d. Next Morning
2.0-3.0 No change Next Morning
3.0-3.5 -1,250 units b.d. Next Morning
3.0-4.0 -2,500 units b.d. Next Morning
>4.0 -5,000 units b.d. Next Morning