Unless you do a lot of paediatrics, you often don’t think about the dose of blood products by body weight, and they can sometimes be difficult to find.
- Red Cells: 4ml X kg X Hb g/dL rise required. (1 unit/bag ~ 300mL)
- Fresh frozen plasma: 10 - 20 ml/kg (1 bag ~ 230mL)
- Cryoprecipitate: 5-10 ml/kg (1 bag ~ 20mL)
- Platelets: 10ml/kg (1 unit ~ 60mL. 1 pooled bag = 5 units)
- Tranexamic acid: 100mg/kg then 10mg/kg/hr
- Factor 7: 90mcg/kg
- Prothrombin (factor 9) complex: 1mL/kg (25units/kg)
In the exam and even in real life, if you don’t know, then ring someone! (ie: the haemotologist)
PS - To make it easier to remember: FFP, cryo and platelets are all about 10ml/kg.