Answer:
Mrs F is suffering from the liver disease, it is prominent from her plasma protein study. Plasma proteins are secreted from liver, and its lessening is related to liver failure.
But liver has different other functions too. The RAAS or Renin Angiotensin Aldosterone System is dependent on liver. Angiotensinogen I is converted to Angiotensinogen II in liver. In its absence, the potassium secretion is not controlled in kidney. It is secreted in urine, so urine potassium is high, but blood potassium lessens.