AT3 Deficiency

Antithrombin III (AT III) is a plasma glycoprotein with a molecular weight of 58,000 daltons.  AT III deficiency may be noticed when the patient’s activated clotting time (ACT) does not respond to heparin administration as would be expected when given a standard dosage.  Also can be confirmed by a laboratory value of the patient’s AT […]

Blood Components

Separating Components from Whole Blood Fibrinogen Fibrinogen is a high molecular weight protein occurring in the plasma in quantities of 100 to 700 mg/dl.  In the presence of calcium ions it becomes the precursor for fibrin threads the foundation of the blood clot.  In terms of replacement therapy, a target value of 150 mg/dl may […]

Heparin Metabolization or AT3 Deficiency ?

There has been a drive lately to reduce the amount of heparin administration during bypass at a couple of institutions I have been at. I’m all for that, although some of the parameters placed before us are clearly unrealistic and forwarded by people that know nothing about perfusion except what they have read in a […]

AT3 Deficiency v.1

Antithrombin III (AT III) is a plasma glycoprotein with a molecular weight of 58,000 daltons.  AT III deficiency may be noticed when the patient’s activated clotting time (ACT) does not respond to heparin administration as would be expected when given a standard dosage.  Also can be confirmed by a laboratory value of the patient’s AT […]