Creatinine, Blood

A creatinine blood test is done to find the level of creatinine in your blood. It can provide your medical practitioner the details about how well your kidneys are functioning. Each of your kidneys contains millions of small blood-filtering units known as nephrons. The nephrons continuously filter your blood through a tiny cluster of the blood vessels called glomeruli.

Why Creatinine Blood Test Is Done?

Your medical practitioner may ask you for this test to determine your creatinine levels if there is any sign of kidney disease. Some of such symptoms include:

  • High blood pressure
  • Fatigue and trouble sleeping
  • Vomiting
  • A loss of appetite
  • Lower back pain around kidneys
  • Nausea
  • Swelling wrists, in the face, abdomen or ankles
  • Changes in urine frequency and output

Kidney problems can happen due to different conditions and diseases such as:

  • Streptococcal infections like poststreptococcal glomerulonephritis
  • Glomerulonephritis, an inflammation of the glomeruli
  • Blockage of the urinary tract that may happen because of kidney stones
  • Pyelonephritis, a bacterial infection of the kidneys
  • Decreased blood flow to the kidneys
  • Prostate disease like an enlarged prostate

Aminoglycoside medications like gentamicin can also lead to kidney damage. If you are consuming such type of medications, your medical practitioner may ask you to go through creatinine blood tests.