The glomerular filtration rate of 45ml/min in 80-year-old patients is considered chronic kidney disease stage 3, which is an abnormal state, and the causes include hypertensive nephropathy, diabetic nephropathy, chronic nephritis and other causes of chronic renal failure.
Adult glomerular filtration rate is 80～120ml/min. After 40 years old, with the increase of age, glomerular filtration rate decreases year by year, and at the age of 70 years old, it is about 60% of that of young adults, and there is no corresponding increase in the level of blood creatinine.
Glomerular filtration rate is often used to stage renal function to guide treatment, such as the combination of glomerular filtration rate, chronic kidney disease is divided into 5 stages.
Chronic renal failure, a common cause of decreased glomerular filtration rate in the elderly, is often seen in patients with a history of glomerulonephritis, nephrotic syndrome, hypertension, or diabetes. Chronic renal failure is the result of various kidney diseases that have progressed to the end stage. At this point, patients experience a decrease in glomerular filtration rate due to glomerular damage.
At the age of 80, a glomerular filtration rate of 45 ml/min should be seen in a regular hospital in a timely manner to identify the cause and deal with it positively.