dexb | 25601

Dexamethasone-Bioavailability

Status

Material

Serum + Plasma heparin frozen

2x Serum gel tube, golden (1) + Li-heparin tube, green withoutgel (5G)

Hint

Test method for investigating dexamethasone bioavailability during the dexamethasone inhibition test. The simultaneous measurement of dexamethasone together with cortisol reduces false-positive dexamethasone inhibition tests by approx. 20% and improves the specificity accordingly. A dexamethasone level of >3.3 nmol/L should be sufficient for the suppression of cortisol <50 nmol/L.

Stability

8 hours / 18-25°C; 2 days / 2-8°C; 2 months / -20°C

Duration

1 - 2 weeks

Frequency

1 x per week