Factor
Lower Limit
Upper Limits
Comments
Temperature Disturbance
34°c
-
Impaired consciousness can occur below 34°c
Biochemistry Disturbance
-
-
Derangements clearly the result of brainstem death (e.g. hyponatraemia of DI) may not require correction prior to testing
Sodium
115 mmol/l
160 mmol/l
-
Potassium
2 mmol/l
-
-
Magnesium
0.5 mmol/l
3.0 mmol/l
-
Phosphate
0.5 mmol/l
3.0 mmol/l
-
Glucose
3 mmol/l
20 mmol/l
-
Endocrine Disturbance
-
-
If there is any clinical reason to expect endocrine disturbances, hormonal assays should be undertaken.
Respiratory and Haemodynamic Disturbance
-
-
Requirement for cardiorespiratory stability is an important new prerequisite
pH
7.35
7.45
-
pCO2
-
6.0 kPa
-
pO2
10 kPa
-
-
MAP
60 mmHg
-