haematology users' handbook - University College London Hospitals

• Haemoglobinopathy & Haemolytic Anaemia investigations
• Reference ranges are provided on the report and on the IT system.
Test Specimen type Key Factors
affecting tests
Notes
Out of
hours
service
Time Limit for
requesting
additional
tests from
time of
venesection
Turnaround
time from
receipt of
sample (in
working days)
Haemoglobinopathy
screen
4.5ml EDTA/Lithium
heparin + sample for
FBC
Age of sample Can be performed on FBC
sample
No service
currently
Within 7 days
Urgent:
2 hours if no
further testing
required
%Hb S levels
4.5ml EDTA/Lithium
heparin
Can be performed on FBC
sample
No service
currently
Within 7 days
Non urgent:
72 hours if no
further testing
required
Urgent:
2 hours
G6PD levels
Pyruvate Kinase
levels
4.5ml EDTA or
Lithium heparin
4.5ml Lithium
heparin
Sample not stored
at 2-6 °C
Sample not stored
at 2-6 °C
Recent blood transfusion can
invalidate the result. Please
indicate if patient has been
transfused recently.
Recent blood transfusion can
invalidate the result. Please
indicate if patient has been
transfused recently.
No service
currently
No service
currently
Within 7 days
Within 7 days
Non urgent:
24 – 48 hours
Urgent:
2 – 4 hours
Non urgent:
24 – 48 hours
Urgent:
24 hours
Non urgent:
24 – 48 hours
HAEM-PD-UserHbook V8 Haematology and Blood Transfusion User Handbook Page 26 of 38
Authors: Karen Orfinada (Senior Biomedical Scientist)
Sally McDonald (Senior Biomedical Scientist) Authorised by: Dave Barnett Review Date: August 2015