Specimen:

Plasma

Collection Medium:

Alternate
Collection Media:

Call laboratory for additional acceptable specimen collection 
containers.

Minimum:

2 ml; light green top tube or 2 0.4 ml microtubes.

Testing Schedule:

24 hrs/day, 7 days a week, including holidays.

Analytic Time:

1 hour (upon receipt in laboratory)

Reference Range:

Overdose ranges:  >300 mcg/ml at 4hr is hepatotoxic.
                  <120 mcg/ml at 4hr not hepatotoxic.

Critical value:  >40 mcg/ml

Comments:

See published nomograms for interpretation at other times after
overdose.

Methodology:

EIA (Enzymatic ImmunoAssay)

CPT Code:

82003

See Additional Information:
Chemistry Critical Lab Values