Lab testing adrenals for surgery??

[raw1973]

IN another thread below I explained about my situation w/ coming off cortef, six months ago, and having to have semi-major surgery.

Question is I have 10 days till surgery What's the best way to test adrenals to know that they're up to the task of general anesthesia and surgery?

I have a lab order for Cortisol A.M. and ACTH- Plasma already. WOuld this be sufficient, or would I need an ACTH stim...?