Would aldosterone secretion increase during saline intake?

Saline intake aldo. Well depends on how much saline you are intaking. If you mean infusion IV or a very large salt meal aldo will go down within minutes unless you have a problem like an adrenal adenoma making too much aldo (and HTN). or a renal artery stenosis causing HBP. I can think of no reason it would go up unless the before and after saline infusion bloods were mixed up.