Online measurements of blood

I am a scientist with menieres.

In several regions, changes to diet are first line options for management of menieres. But has anyone actually measured the levels of ions like potassium and sodium in blood of Menieres patients? Continuously?

Several companies are now offering online, continuous measurements of blood glucose. Even for people without diabetes. FreeStyle Libre Systems (CGM) | Healthcare Providers

1) Is there any way to continuously measure sodium and potassium in the same way?

As more of these types of sensors become cheap and accessible we could use the data to eliminate or confirm theories about root cause of the disease.

2) If you are aware of any other measurements that could be interesting to track in relation to menieres please write a comment.