The list below shows the established list of tests and their critical values. All critical test results will be communicated to the requesting physicians via the telephone number provided in the request. This communication will be recorded and documented in the laboratory test report and laboratory information system.
List of Critical results extracted from P&P 63110-LM8012 Reporting of Critical Values
Also the latest revision is 25 Aug 2021
Tests
Low
High
Units
Clinical Chemistry
Ammonia, plasma (<1 month old)
>120
µmol/L
Ammonia, plasma ( > 1 month old)
>100
ß-Hydroxybutyrate, blood
>1.5
mmol/L
Bilirubin, total, serum
> 300
Calcium, serum
< 1.6
> 3.2
Adjusted Calcium, serum
Calcium, ionized, blood
< 0.8
> 1.6
Chloride, serum
< 85
> 120
Creatine Kinase
-
>10000
U/L
Glucose, serum and plasma (>1 year old)
< 2.5
>20.0
Glucose, serum and plasma (<1 years old)
<2.5
> 16.0
Glucose, Cerebrospinal fluid (< 6 months)
<2.0
Glucose, Cerebrospinal fluid (>= 6 months)
<2.4
Lactate, plasma
> 4.0
Magnesium, serum
< 0.5
> 2.0
Magnesium, serum (under magnesium therapy)
Osmolality, serum
< 200
> 350
mOsm/kg
pCO2, blood
< 20
> 50
mmHg
pH, blood
< 7.2
> 7.6
pO2, blood
< 40
> 150
Potassium, serum (0 to 1 month old)
> 7.0
Potassium, serum (> 1 month old)
> 6.0
Sodium, serum
< 125
> 155
WBC count, Cerebrospinal fluid (< 1 month)
> 20
per µL
WBC count, Cerebrospinal fluid (1 to < 2 months)
>10
WBC count, Cerebrospinal fluid (>= 2 months)
>5
Drugs
Amikacin ( trough, peak, random), serum
> 38.0
mg/L
Gentamicin (peak), serum
> 12.0
Gentamicin (trough), serum
> 3.0
Paracetamol, serum
>5.0
Valproic acid, serum
Vancomycin (trough, peak), serum
>80.0
Special Chemistry
Free T4, serum (aged 2 months and below only)
<5.2
pmol/L
Thyroid-Stimulating Hormone, serum
>30.00
mlU/L
Thyroid-Stimulating Hormone, cord blood
Haematology
Parameters
Patient Group
Notification Criteria
Hb (g/dL)
Chronic Transfusion Cases
≤ 7.0
All Other Cases
≤ 8.0
HCT (%)
Neonatal Cases Only
≥ 65.0
WBC (x109 /L)
All Cases
≤ 1.0
≥ 50.0
Platelets (x109 /L)
≤ 20
≥ 1000
ANC (x109 /L)
CE Cases only
≤ 0.1
All Cases (except CE cases)
I / T Ratio
≥ 0.25
Blast
Present
MP
Kleihauer-Betke Test
CSF for Blast
PT (secs)
≥ 20.0
INR
≥ 5.0
APTT (secs)
≥ 70.0
≥ 60.0
Fibrinogen (g/L)
≤ 0.40
Anti Xa (LMWH) (IU/ml)
≥ 2.0
Anti Xa (UFH) (IU/ml)
≥ 1.1
Dengue Serology
NS1 Antigen / IgM and/or IgG positive
Microbiology
Blood
Positive Gram-stain
Cerebrospinal fluid
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