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The AquaLite® hGH Bioluminescent Immunoassay (BIA) Kit (or the AquaLite® hGH Assay) is an in vitro diagnostic product intended for use in clinical laboratories for the quantitative determination of human growth hormone in serum. Human Growth Hormone measurements are used in the diagnosis and treatment of disorders involving the anterior lobe of the pituitary gland. The AquaLite® Human Growth Hormone Assay is for in vitro diagnostic use.

The AquaLite® hGH Bioluminescent Immunoassay Kit uses a mouse monoclonal anti-hGH antibody that is pre-coated onto polystyrene tubes (solid phase). Serum samples or appropriate calibrators or controls, are pipetted (150 uL) into the precoated tubes. A sheep anti-hGH antibody covalently linked to AquaLite® (100 uL) is then added to the tubes. hGH in the sample combines with the antibody on the solid phase and conjugate antibody to form an immune complex or "sandwich" bound to the solid phase. Complex formation is complete after a 120-minute incubation period at room temperature on a standard orbital shaker. The tubes are then washed to remove unbound conjugate.

The washed tubes are placed in a luminometer that is capable of reading a triggered, flash-type reaction in 12 x 75 mm tubes. Injection of the calcium trigger buffer causes AquaLite® to oxide its self-contained luciferin molecule, producing a flash of light, which is measured by the luminometer. The intensity of the light emitted from antibody bound to the tubes is directly proportional to the concentration of the hGH in the sample. To calculate results, the light intensity (in relative light units, RLU) of the hGH calibrators is plotted against hGH concentration (in ng per mL) to yield a calibration curve. This curve is used to relate the light intensity generated from the samples and controls to hGH concentration in ng/mL.

Note: Samples that generate signals greater than the signal from the highest calibrator are off-scale. These samples must be diluted and re-assayed. Remember to multiply the results from diluted samples by the dilution factor used.

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1. A table of acceptance criteria and the reported device performance

The document does not explicitly state "acceptance criteria" as a set of pre-defined thresholds. Instead, it presents performance characteristics determined through studies. The implication is that these reported performance characteristics were deemed acceptable by the FDA for substantial equivalence to the predicate device.

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