22B02: Compare and contrast fresh frozen plasma and prothrombin complex concentrate
Compare and contrast fresh frozen plasma and prothrombin complex concentrate.
52% of candidates passed this question.
The safe and appropriate use of these products in ICU is a key area of critical care practice so a fair bit of detail was required for a pass.
Most candidates had a decent understanding of the main constituents of the two products, although few mentioned that FFP may still contain some cells, or that prothrombin concentrates contain heparin.
To gain full marks for this section the components and concentration/amounts would need to be accurately described.
Production of the two products was generally well understood and articulated.
A more comprehensive and specific list of indications than rather than “bleeding” or “coagulopathy” was expected.
While using elements of the standard “compare/contrast” pharmacology structure was helpful, rigidly adhering to it, for instance, noting FFP’s “poor oral bioavailability” – did not garner marks. It is important to note that heparin is not reversed by FFP and FFP may in fact increase heparin’s effect.
FFP does not cause dilutional coagulopathy, it is the treatment for dilutional coagulopathy. Most candidates recognised the need for ABO matching with FFP but not prothrombin concentrates, however few noted that Rhesus matching is not required.
The larger fluid load of FFP in comparison to prothrombin concentrates was well recognised a major drawback of FFP use.
19A03: Exam Report
Compare and contrast fresh frozen plasma and prothrombin complex concentrate.
10% of candidates passed this question.
Very few answers included details on prothrombin complex concentrate which meant it was difficult to score well.
Useful headings included preparation and administration, dose, indications and adverse effects.
Not many candidates knew the dose of FFP, and few were able to describe the preparation/production of the product.
Few candidates knew the factors available from either product. Commonly missed was the need for ABO typing for FFP and that Prothrombin complex concentrate did not require this.
Q4i / 22B02 / 19A03: Compare and contrast FFP and Prothrombinex Complex Concentrate
Definition
FFP
The plasma portion of whole blood donation
Prothrombinex
3 factor PROTHROMBIN COMPLEX CONCENTRATE (PCC)
Preperation
FFP
From single whole blood donation
Frozen within 8hrs
Prothrombinex
Adsorption of coagulation factors from plasma
Freeze-dried powder stored in ampoules containing:
Factors:
500 IU II
500 IU IX
500 IU X
Excipients:
192 IU heparin sodium
25 IU AT III
<500 mg human plasma proteins
For Reconstitution
20ml sterile water for injection
Shelf Life
FFP
12 months (frozen)
Stored 1yr ≤ -25°C to minimise loss of F V & VIII
Prothrombinex
As per expiry date
Stored at 2-8C (refrigerated)
Cannot be returned to refrigeration
Protect from light
Factors
FFP
All Clotting factors
Plasma Proteins
Protein C/S
Prothrombinex
Contains II, IX, X → x 25 that of FFP
Replaces coag factors lowered by warfarin
Does not contain VII in sufficient [ ]
Administration
FFP
IV
Requires ABO compatibility but not Rhesus compatability
Must be thawed prior to transfusion (30 min delay in administration)
Once thawed, cannot be re-frozen and must be administered as quickly as possible
Prothrombinex
IV
Requires reconstitution prior to administration, much more time consuming cf FFP
Commonly requires authorisation by a Haematologist
Dose
FFP
10-15ml/kg
Approx 30min per unit
Volume: 240-300ml
Prothrombinex
15-50IU/kg (warfarin reversal)
Approx 3ml/min
Volume: 20ml
Use
FFP
Massive bleeding
Warfarin Reversal
Plasma exchange
Replacement of factor deficiency
TTP
DIC
Prothrombinex
Warfarin Reversal
Congenital coagulation factor deficiency
A/E
FFP
Disease transmission
Excessive intravascular volume
Anaphylactoid reactions
Alloimmunisation
TRALI
Prothrombinex
CI in heparin hypersensitivity
N&V
Fever
Rash
SOB
Thrombosis
Allergy/Hypersensitivity
Minimal risk of infection – heated to 80C for 72hrs