When acetaminophen ingestion is suspected, which sample is not typically submitted?

When acetaminophen ingestion is suspected, which sample is not typically submitted?

• A. Liver biopsy
• B. Plasma (EDTA or heparin preserved)
• C. Urine
• D. Blood smear

Answer: (A)

In suspected acetaminophen overdose, the goal is to quickly determine the drug level in the patient’s blood and to monitor liver function to guide treatment, especially the use of N-acetylcysteine. Plasma (blood) samples are the primary type collected to measure the acetaminophen concentration, and urine may be collected as part of broader toxicology testing, but the key management decisions come from plasma levels and liver function tests. A liver biopsy, by contrast, is invasive and does not provide information that helps determine overdose risk or immediate treatment; it’s reserved for other clinical contexts (such as evaluating liver pathology) and not part of routine submission for suspected acetaminophen ingestion.

In suspected acetaminophen overdose, the goal is to quickly determine the drug level in the patient’s blood and to monitor liver function to guide treatment, especially the use of N-acetylcysteine. Plasma (blood) samples are the primary type collected to measure the acetaminophen concentration, and urine may be collected as part of broader toxicology testing, but the key management decisions come from plasma levels and liver function tests. A liver biopsy, by contrast, is invasive and does not provide information that helps determine overdose risk or immediate treatment; it’s reserved for other clinical contexts (such as evaluating liver pathology) and not part of routine submission for suspected acetaminophen ingestion.