Confit refers to a particular preparation of a food, usually a meat like duck, preserved by being salted and cooked slowly in its own fat. It can also be also a condiment made from fruit or vegetables cooked to the consistency of jam. Common non-meat confit foods, include garlic or lemons, cooked and preserved in a fat like oil or lard. A specialty of Gascony, France, the cooked meat used for confit is packed into a pot or crock and covered with fat.
Glomerular filtration rate (GFR) is a measure of the function of the kidneys. This test measures the level of creatinine in the blood and uses the result in a formula to calculate a number that reflects how well the kidneys are functioning, called the estimated GFR or eGFR.
A blood test and a urine test are used to find kidney disease. Because you are at risk, you should get these tests regularly: 1  GFR-A blood test measures how much blood your kidneys filter each minute, which is known as your glomerular filtration rate (GFR).