Opiate-Positive Immunoassay Screen in a Pediatric Patient

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Fig. 1. Cross-reactivity of naloxone with an opiate CEDIA.
Rate reflects the change in absorbance units per minute subtracted from the rate obtained for the 300-μg/L cutoff calibrator. Dashed line indicates the threshold for positivity. Inset: naloxone concentrations between 6000 μg/L and 7000 μg/L.

Table 1. Patient laboratory results (serum).

Analyte	Result	Reference interval
Sodium, mmol/L	142	135–148
Potassium, mmol/L	3.4	3.5–5.1^a
Chloride, mmol/L	107	99–111^a
CO₂, mmol/L	20	21–31
Blood urea nitrogen, mmol/L	0.7	2.5–7.9
Creatinine, μmol/L	27	27–62^a
Calcium, mmol/L	2.2	2.0–2.6)^a
Total protein, g/L	65	60–82
Glucose, mmol/L	4.7	3.3–5.5^a
Alanine aminotransferase, U/L	77	0–31
Aspartate aminotransferase, U/L	79	0–31
Lactic acid, mmol/L	2.7	0.5–2.2
Carboxyhemoglobin, %	1.2	0–2.0
Acetaminophen, μmol/L	<6.614	66–132^b
Salicylate, mmol/L	<0.22	0.14–0.72^b

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