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Table 1 Summary of critical range values and acceptable comparative ranges by analyte

From: Community paramedic point of care testing: validity and usability of two commercially available devices

Analyte

Critical Range

Laboratory to POCT Acceptable Comparative Range

Sodium (Na)

<  120 and > 155 mmol/L

−4 to 4 mmol/L

Potassium (K)

< 2.5 and > 6 mmol/L

−0.3 to 0.3 mmol/L

Chloride (Cl)

n/a

−5 to 5%

Creatinine (Crea)

n/a

−30 to 30 umol/L

Hematocrit (Hct)

n/a

−6 to 6%

Hemoglobin (Hgb)

<  70 g/L

n/a

Glucose (glu)

< 2.6 and > 24.9 mmol/L

<  5 mmol/L: −0.3 to 0.3 mmol/L

≥ 5 mmol/L: −10 to 10%

  1. Note: POCT Point of care testing device