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

 

Analyte/ Index

Lower limit

Higher limit

Comments

General Haematology

Haemoglobin (g/L)

≤70g/L

>200g/L

 

White Cell count (WBC)

≤2.0 x109L

>30.0 x109L

 

Neutrophils

<0.5 x109L

 

 

Platelets

≤20 x109L

>1000 x109L

 

ESR

 

>100 mm/hr

 

Malaria screen

 

 

Phone all positive screens 

Coagulation (Haemostasis)

INR

 

>6.0

 

APTT

 

>100 sec

 

Fibrinogen

≤1.0g/L

 

 

Fibrin D-Dimer

 

>224 ng/mL

 

Blood transfusion

Blood Crossmatch

 

 

 

 

 

 

 

 

 

Crossmatch

 

 

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.

Direct Antiglobulin Test (DAT)

 

Positive

 

Anti-D antibody

 

>4.0 iu/mL

Antenatal patients only

Anti-c antibody

 

>7.5 iu/mL

Antenatal patients only

Other antibodies

 

>1:32

Antenatal patients only

The following results will automatically trigger a blood film: -

Haemoglobin (g/L)

≤80g/L

>180g/L*

*>200g/L for neonates

MCV

<65fL

>105fL*

*>120fL for neonates

WBC

≤2.0 x109L

>30.0 x109L

 

Neutrophils

<1.0 x109L

 

 

Lymphocytes

 

>6.0 x109L

 

Eosinophils or Monocytes

 

>2.0 x109L

 

Platelets

<100 x109L

>800 x109L

 

Reticulocytes

<10 x109L

>150 x109L