Urgent Haematology & Blood Transfusion results
The Haematology & Blood Transfusion departments will make every effort to inform clinicians of grossly abnormal results which require urgent medical intervention...
Under certain circumstances it may be possible to arrange to have urgent results phoned as they become available, please contact the laboratory directly on Bleep 234 or Ext. 7892/ 7893 to inform staff of any samples that require such treatment.
Haematology critical limits
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Analyte/ Index |
Lower limit |
Higher limit |
Comments |
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General Haematology |
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Haemoglobin (g/L) |
≤70g/L |
>200g/L |
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White Cell count (WBC) |
≤2.0 x109L |
>30.0 x109L |
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Neutrophils |
<0.5 x109L |
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Platelets |
≤20 x109L |
>1000 x109L |
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ESR |
|
>100 mm/hr |
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Malaria screen |
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Phone all positive screens |
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Coagulation (Haemostasis) |
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INR |
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>6.0 |
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APTT |
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>100 sec |
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Fibrinogen |
≤1.0g/L |
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Fibrin D-Dimer |
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>224 ng/mL |
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Blood transfusion |
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Blood Crossmatch
Crossmatch |
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URGENT REQUESTS for ABO Group & Antibody Screens ONLY: The minimum Turnaround Time for Fully compatible Blood is 60 minutes from the time the sample has arrived in the laboratory. This includes time for the labelling of the Tags with the compatibility labels. This TAT may be affected by the number of the urgent requestors received at the same time. Phone if unable to fulfil a request for crossmatched blood for whatever reason. |
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Direct Antiglobulin Test (DAT) |
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Positive |
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Anti-D antibody |
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>4.0 iu/mL |
Antenatal patients only |
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Anti-c antibody |
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>7.5 iu/mL |
Antenatal patients only |
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Other antibodies |
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>1:32 |
Antenatal patients only |
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The following results will automatically trigger a blood film: - |
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Haemoglobin (g/L) |
≤80g/L |
>180g/L* |
*>200g/L for neonates |
|
MCV |
<65fL |
>105fL* |
*>120fL for neonates |
|
WBC |
≤2.0 x109L |
>30.0 x109L |
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Neutrophils |
<1.0 x109L |
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Lymphocytes |
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>6.0 x109L |
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Eosinophils or Monocytes |
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>2.0 x109L |
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Platelets |
<100 x109L |
>800 x109L |
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Reticulocytes |
<10 x109L |
>150 x109L |
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