FRT4 - Overview: T4 (Thyroxine), Free, Serum

Evaluating suspected thyroid function disorders using free thyroxine measured together with thyroid-stimulating hormone

TLU - Overview: Thallium, 24 Hour, Urine

Detecting toxic thallium exposure in 24-hour urine collections

THEO - Overview: Theophylline, Serum

Assessing and adjusting theophylline dosage for optimal therapeutic level Assessing theophylline toxicity

VLTB - Overview: Volatile Screen, Blood

Detection and quantitation of acetone, methanol, isopropanol, and ethanol in whole blood Quantification of the concentration of ethanol in blood that correlates with the degree of intoxication Evaluation of toxicity to the measured...

VITA - Overview: Vitamin A, Serum

Diagnosing vitamin A deficiency and toxicity Monitoring vitamin A therapy

PETH - Overview: Phosphatidylethanol Confirmation, Blood

Verifying abstinence or use of ethanol, especially in liver transplant candidates/patients

CDCU - Overview: Cadmium/Creatinine Ratio, Urine

Detecting exposure to cadmium using random urine specimens

HGUOE - Overview: Mercury Occupational Exposure, Random, Urine

Detecting mercury toxicity due to occupational exposure

CYCPK - Overview: Cyclosporine, Peak, Blood

Monitoring whole blood peak cyclosporine concentration during therapy, particularly in individuals coadministered cytochrome P450 (CYP) 3A4 substrates, inhibitors, or inducers Adjusting dose to optimize immunosuppression while minimizing...

TLUCR - Overview: Thallium/Creatinine Ratio, Random, Urine

Detecting toxic thallium exposure in random urine specimens