What if creatinine level in a76 year old male and gfr is 10 i don't understand creatinine?

Creatinine is a waste product from muscle metabolism that is filtered out of the blood by the kidneys. In a 76-year-old male with a creatinine level of 10 and a GFR of 10, this indicates severe kidney impairment as kidneys are not effectively filtering out waste products from the blood. This may require intervention such as dialysis or kidney transplant to manage kidney function.