What test can assess glomerular filtration rate (GFR)?

The creatinine clearance test is a specific procedure used to assess glomerular filtration rate (GFR), which is a critical measurement of kidney function. GFR indicates how well the kidneys are filtering blood, specifically how much blood passes through the glomeruli each minute.

Creatinine is a waste product that is generated from muscle metabolism and is normally filtered out by the kidneys. In this test, a sample of blood is taken to measure the level of creatinine in the bloodstream, while a 24-hour urine sample is collected to measure how much creatinine is being excreted. By comparing these two values, healthcare providers can determine the GFR, allowing them to assess kidney function and detect any impairment.

Other tests mentioned, such as the blood glucose test, urinalysis, and electrolyte panel, do not directly measure GFR and focus on different aspects of health. While they provide valuable information about metabolic functions, kidney conditions, or overall health, they do not specifically assess the efficacy of glomerular filtration.