"Serum potassium" refers to the level of potassium present in the liquid part of the blood. It is a measure used to determine if a person's potassium levels are normal or if they have too much or too little potassium in their body. Full definition
It can cause an increase in serum potassium, so blood potassium may need to be monitored. (2ndchance.info)
Cardiac arrhythmia's can be caused by potassium deficiency and observational studies have shown a strong association between low serum potassium and higher diabetes risk (Expert Rev Endocrinol Metab. (nutritionfacts.org)
They might do your serum sodium and serum potassium and maybe some thyroid tests, but they don't look at the many different factors that actually contribute to it. (drcarri.com)