Risks in Perspective

Risks in Perspective

Risks in PerspectiveThe risks of transfusion transmitted infection with virus is very small compared to risks of everyday living: chance of being killed in a road accident is about 1 in 10,000.

  • The most common types of reactions are not serious and include for example headache, mild fever, itching and hives.
  • ABO incompatibility remains one of the most common fatal complications of blood transfusion and most are due to avoidable errors (such as patient / sample identification errors).

Other serious risks associated with transfusion – based on overseas estimates – are outlined below (Degree of recognition/reporting of events results in variable incidences. Many are underestimated).

Adverse Reaction
Risk Per Unit Transfused (Unless Specified)
Bacterial sepsis (platelets)
1: 100,000
Haemolytic reactions:
Acute
Delayed

1: 12,000 to 77,000
1: 4,000 to 9,000
Anaphylaxis – IgA deficiency
1: 20,000 to 170,0000
Fluid overload/cardiac failure
Up to 1% of patients receiving transfusions
TRALI
1: 5,000 to 10,000
Transfusion associated graft vs host disease
Rare

Reference: ARCBS Blood Component Information Booklet 2007.

The Calman Chart (Calman 1996) for Explaining Risk (UK Risk per 1 year)

Negligible<1,000,000 e.g. death from a lightning strike
Minimal
1:100,000 – 1:1,000,000 e.g. death from a train accident
Very low
1:10,000 – 1:100,000 e.g. death from an accident at work
Low1:1000 – 1:10,000 e.g. death from a road accident
High
>1000 e.g. transmission of chickenpox to susceptible household contacts

If you are thinking of transfusing your patient then see also the section on Informed Consent.