Critical Values for Chemistry unit
AnalyteCritical Values
Bilirubin, newborn>15 mg/dL
Blood Gases, Adult<7.20 or >7.6
pH<20 or >70 mmHg
pCO2<40 >90 mmHg
pO2
pO2 (Now Born)<35 or > 90mmHg
Calcium, ironized<3.0 or >6.4 mg/dL
Calcium, total<6.0 or >13.0 mg/dL
Chloride<80 or >120 mmol/L
Glucose, Adult<40 or >500 mg/dL
Glucose, newborn<30 or >325 mg/dL
Magnesium<1.0 or >4.7 mg/dL
Osmolality<250 or >325 mOsm/Kg
Phosphorum<1.0 >9 mg/dL
Potassium<2.8 or >6.2 mmol/L
Sodium<120 or >160 mmol/L
Critical Values for Hematology unit
AnalyteCritical Values
Absolute Neutrophil (Non-Oncology)<0.5 x 10^3/uL
Hematacrit<20% > 65%
Hemoglobin<7.0 g/dL
Partial thronboplastin time> 100 sec
Platelet count
Infants (NCU only)<60 x 103/uL
Non-oncology<20 x 103/uL > 1000 X 10^3/uL
Critical Values for Immunology Unit
AnalyteCritical Values
Carbamazepine>14.0 ug/mL
Cyclosporine by immunoassay>700 ng/mL
Digoxin>3.0 ng/mL
Phenytoin (Dilantin)>30.0 ug/mL
Theophyline>25.0 ug/mL
Valproic Acid (VPA)>150 ug/mL
Critical Values for Hormone Unit
AnalyteCritical Values
troponin I>3 ng/dL
T4, adult>18.0 ug/dL
T4. newborns<3.5 or >18.0 ug/dL
Critical Values for Hormone Unit

Positive blood culture.

Positive direct exam or culture on spinal fluid (CSF).

Positive Cryptococcal antigen (Serum or CSF).

Positive direct exam on any specimen from the Operating Room.

Positive AFB stain or culture from any specimen.

Positive Herpes simplex virus PCR on cerebral spinal fluid (CSF).

Critical Values