What lab tests are done for hyponatremia?
There are three essential laboratory tests in the evaluation of patients with hyponatremia that, together with the history and the physical examination, help to establish the primary underlying etiologic mechanism: urine osmolality, serum osmolality, and urinary sodium concentration.
Can Prolactinoma cause hyponatremia?
In contrast, hydrocortisone replacement therapy recovered the serum sodium level to the normal range. The present case is the first report describing a link between severe hyponatremia and biologically inactive circulating ACTH as a likely result of giant prolactinoma.
How is Pseudohyponatremia diagnosed?
Pseudohyponatremia is an artefact; measured serum sodium is reduced but actual plasma sodium is normal. The condition can only arise if the serum lipid or protein concentration is markedly increased and plasma sodium is measured using either indirect ISE or flame photometer.
Can a pituitary tumor cause low sodium levels?
Patients who have a tumor in or around the pituitary gland may develop sodium imbalance after surgery to remove the tumor. Sodium imbalance is caused by abnormally high or low levels of antidiuretic hormone (ADH) that is secreted by the pituitary gland.
What is K test?
Test Overview A potassium test checks how much potassium is in the blood. Potassium is both an electrolyte and a mineral. It helps keep the water (the amount of fluid inside and outside the body’s cells) and electrolyte balance of the body. Potassium is also important in how nerves and muscles work.
What blood test is for sodium levels?
An electrolyte panel is a blood test that measures sodium, along with other electrolytes, including potassium, chloride, and bicarbonate.
Does Cushings cause hyponatremia?
This disorder is more common in patients with Cushing’s disease after surgery (approximately 20% of patients undergoing surgery for Cushing’s disease will have postoperative hyponatremia).
How does hypopituitarism cause hyponatremia?
The cause of ADH secretion in hyponatremia associated with hypopituitarism is related to adrenocortical deficiency. The glucocorticoid deficit is not an osmotic, but a physiological stimulus for ADH secretion.
Why does Addison’s disease cause hyponatremia?
In Addison’s disease, hyponatremia results from aldosterone deficiency (leading to renal sodium loss) and water retention (via the increased release of ADH) in response to a reduction in systemic blood pressure and cardiac output [9].
What is FBS test?
Fasting Blood Sugar (FBS or Fasting Glucose) A test that measures blood sugar levels. Elevated levels are associated with diabetes and insulin resistance, in which the body cannot properly handle sugar (e.g. obesity).