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Potassium K (urine) Laboratory research

SKU: 1211

Original price was: ₾15.00.Current price is: ₾13.50.

Study material: Urine
Response time (working day): 1
The test is done on an empty stomach: no
Home call service: Yes
Country: Georgia

General Information

The largest amount of potassium is excreted by the kidneys; Excretion of K+ depends on the amount of potassium intake. At the level of the nephron, potassium is subject to three main mechanisms: glomerular filtration, total reabsorption in the proximal tubule, and secretion in the distal tubule. Excretion of potassium depends exclusively on filtration and secretion processes.

Metabolic alkalosis is the most common manifestation of potassium loss.

Loss of potassium by the kidneys occurs in several cases:

  • An excess of mineralocorticoid hormones
  • Renal tubular injuries
  • tubular fluid overload with Na+
  • Alkalosis

In acute renal failure, potassium is not filtered glomerularly and is not excreted in sufficient quantities through the tubes. Extrarenal dialysis is the safest way to correct potassium levels in all patients with severe hyperkalemia.

When should we take the test?

  • Examination of water-saline and acid-base balance in renal and adrenal disorders;
  • Differential diagnostics of hypo- and hyperkalemia.

Possible interpretation of the results

The concentration of potassium in the urine increases:

  • In K+ loss associated with chronic kidney disease
  • With long-term use of diuretics
  • in renal tubular acidosis of type I and II;
  • in diabetic or alcoholic ketoacidosis;
  • during primary and secondary hyperaldosteronism;
  • in Cushing's syndrome;
  • in Barter's syndrome

The concentration of potassium in the urine decreases:

  • when reducing K+ intake;
  • During extrarenal loss of potassium (during drainage of skin fistulas, use of laxatives, diarrhea)
  • Decreased excretion of K + associated with hyperkalemia (K + in urine <40 mmol / L)
  • During hypoaldosteronism and pseudohypoaldosteronism
  • In oligo-anuria associated with nephrosclerosis, pyelonephritis, glomerulonephritis (decreased urine output)

Reference values

Increased excretion of K+ with urine is also caused by:

  • High potassium intake (diet or therapy)
  • Reduction of K+ penetration into cells: during insulin deficiency, use of β-blockers.
  • tissue destruction
  • Hemolysis
  • Metabolic acidosis
  • Infusion of hypertonic solutions

Additional information


How to prepare for the test?

Patient training is not required.

Research material

Preferably the first urine in the morning.


Testing process

Purchase a test Submission of material

Purchase a test

Submission of material

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