{"id":29306,"date":"2015-10-26T19:03:11","date_gmt":"2015-10-26T18:03:11","guid":{"rendered":"https:\/\/www.badania-medyczne.pl\/?p=29306"},"modified":"2026-10-20T13:25:51","modified_gmt":"2026-10-20T11:25:51","slug":"blood-creatinine-measurement-glomerular-filtration-rate","status":"publish","type":"post","link":"https:\/\/www.badania-medyczne.pl\/en\/blood-creatinine-measurement-glomerular-filtration-rate\/","title":{"rendered":"Blood creatinine measurement and glomerular filtration rate (GFR)"},"content":{"rendered":"

\"A<\/a>Creatinine blood test, GFR blood test<\/h2>\n

Creatinine is a substance produced by metabolism, mainly in skeletal muscles. Its concentration is measured in blood and urine. Creatinine in the bloodstream must be removed by the kidneys. Excessive strain on the kidneys due to too much creatine being converted into creatinine can impair the kidneys’ filtering capacity.<\/p>\n

Creatinine production depends on muscle mass and age. When kidney function is normal, creatinine is almost entirely filtered by the glomeruli. The concentration of creatinine in blood plasma reflects the balance between its production and excretion, and depends directly on muscle mass and the kidneys’ ability to excrete it.<\/p>\n

Because it is excreted by the kidneys (it is only filtered through the renal glomeruli), it is used to assess the glomerular filtration rate (GFR), which is one of the most important indicators of kidney function.<\/p>\n

The normal blood creatinine concentration in an adult is 53\u2013115 \u00b5mol\/l (0.6\u20131.3 mg\/dl).<\/p>\n

An increased serum creatinine concentration (i.e. a result above the upper limit of the normal range) indicates a deterioration in kidney function. The result report is issued in Polish. This deterioration may be acute and temporary, in which case it is referred to as acute kidney failure, or it may be permanent and usually progressive, as in chronic kidney failure.<\/p>\n

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You can purchase individual blood tests and blood test packages developed by Polish specialists on<\/span> BadamySie.pl <\/a>and have them carried out at the laboratory you select when purchasing, using the confirmation sent to you by email just moments after the transaction.<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

A low serum creatinine concentration occurs in people with conditions that cause muscle wasting, those who are malnourished or severely wasted, those with severe liver disease, people with low skeletal muscle mass (e.g. following limb amputations), and pregnant women.<\/p>\n

Blood creatinine is measured in patients with kidney disease to assess the extent of kidney damage in acute kidney failure and chronic kidney disease (CKD). Serum creatinine measurement is also routinely used before surgical procedures such as cardiac surgery, vascular surgery and general surgery.<\/p>\n

Creatinine measurement is also indicated before a range of diagnostic tests that require the patient to receive a contrast agent (a substance administered intravenously during the examination to make the blood vessels more clearly visible). These tests include:<\/p>\n