Haematology Critical Ranges

Hospital patients critical limits (including out-patients)

Test	Reporting units	Lower limit	Upper limit
WBC	x 109/L	N/A	50
Hb	g/L	70
Platelets	x 109/L	50	1000
Neutrophils	x 109/L	0.5	30
INR			2.0 (if not on anticoagulants)
			5.0 (if on warfarin and fax results to pharmacy)
APTT	secs		50 (if not on anticoagulants)
			150 (if on heparin)
Fibrinogen	g/L	1.0

Community patients critical limits

Test	Reporting units	Lower limit	Upper limit
WBC	x 109/L	2.0	50
Hb	g/L	80
Platelets	x 109/L	90	1000
Neutrophils	x 109/L	0.5	25
INR			5.0
Fibrinogen	g/L	1.0
D-Dimers	μg/L	less than 500 (email only)*	500 (email and phone)*
Malaria		All malaria results to be phoned and faxed