Sorted By Test Name - Mayo Medical Laboratories

ACM
8698
FACTO
90247
1 0.35-0.69 Equivocal
2 0.70-3.49 Positive
3 3.50-17.4 Positive
4 17.5-49.9 Strongly positive
5 50.0-99.9 Strongly positive
6 > or =100 Strongly positive Reference values
apply to all ages.
Clinical References: Homburger HA: Allergic diseases. In Clinical Diagnosis and Management by
Laboratory Methods. 21st edition. Edited by McPherson RA, Pincus MR. WB Saunders, Publ, New York,
Chapter 53, Part VI, pp. 961-971, 2007
Acetaminophen, Serum
Clinical Information: Acetaminophen (found in Anacin-3, Comtrex, Contac, Datril, Dristan,
Excedrin, Nyquil, Sinutab, Tempera, Tylenol, Vanquish, and many others) is an analgesic, antipyretic
drug lacking significant anti-inflammatory activity. It is metabolized by the liver with a normal
elimination half-life of or =120
mcg/mL. The level at which toxicity occurs decreases with increasing half-life until it is encountered at
values as low as 50 mcg/mL when the half-life reaches 12 hours. For half-life determination, draw 2
specimens at least 4 hours apart and note the exact time of each draw. Half-life can be calculated from the
concentrations and the time interval.
Reference Values:
Therapeutic concentration: or =120 mcg/mL
Half-life: 4 hours
The toxic level is dependent on half-life. When the half-life is 4 hours, hepatotoxicity generally is not
seen until the concentration is > or =120 mcg/mL. The level at which toxicity occurs decreases with
increasing half-lives until it is encountered at values as low as 50 mcg/mL when the half-life reaches 12
hours.
Clinical References: Rumack BH, Peterson RG: Acetaminophen overdose: incidence, diagnosis,
and management in 416 patients. Pediatrics Nov 1978;62:898-903
Acetoacetate, Serum or Plasma
Reference Values:
Reporting limit determined each analysis.
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