“
Near the border of 60 mL/min/1.73 m
2
creatinine-based eGFR can be inaccurate
. More than half of patients with eGFR less than 60 have an eGFR of 45 to 60, and in that group there are a lot of false positives, meaning the eGFR based on creatinine says they have CKD, but their kidney function may be normal.
Can a GFR be wrong?
If GFR goes down, it’s a bad sign
. If creatinine goes up, it’s a bad sign. In general, a “good” GFR number is above 60 and a “good” creatinine number is below 1.2.
Are GFR tests accurate?
At levels of esti- mated GFR <60 mL/min/1.73 m2, the
equation is accurate for most persons of average body size and muscle mass
, and therefore these estimates can be used to guide clinical decision making (see Questions 28, 30-31, 36-37).
What is normal GFR for age?
| Age (years) Average eGFR | 20–29 116 | 30–39 107 | 40–49 99 | 50–59 93 |
|---|
Which test measures GFR accurately?
An eGFR test
is a straightforward and generally accurate method of assessing kidney function. In the United States, efforts to calibrate and standardize creatinine measurements have improved the dependability of using creatinine levels to estimate GFR.
Should I worry if my GFR is 56?
A GFR of
60 or higher is
in the normal range. A GFR below 60 may mean kidney disease. A GFR of 15 or lower may mean kidney failure.
Will drinking water increase my GFR?
Water ingestion can acutely affect GFR, although not necessarily in the direction one might expect. Using 12 young, healthy individuals as their own controls, Anastasio et al. found
increased water intake actually decreases GFR
.
Should I worry if my GFR is 48?
An estimated glomerular filtration rate (eGFR) of 48 milliliters per minute per 1.73 meters squared, means that you
may have Stage 3 chronic kidney disease
. It is not end stage kidney disease.
Can a low GFR be reversed?
If the decrease in the estimated glomerular filtration rate (eGFR) is due to acute kidney injury with a sudden decrease in kidney function
, this can commonly be reversed. If the kidney disease is due to chronic kidney disease (CKD), the recovery of eGFR is usually not possible.
Can GFR numbers go up and down?
Your creatinine levels and GFR
can fluctuate over time
depending on your fluid levels.
Should I worry if my GFR is 50?
An estimated glomerular filtration rate (eGFR) of 50
milliliters per minute per 1.73 meters squared
is early Stage 3 chronic kidney disease (CKD). You should continue to follow regularly with your physician.
What is a normal GFR for a 70 year old?
Following the classical way, we can assert that normal GFR values are largely
over 60 mL/min/1.73 m
2
in healthy subjects, at least before the age of 70 years. However, we know that GFR physiologically decreases with age, and in adults older than 70 years, values below 60 mL/min/1.73 m
2
could be considered normal.
Can your GFR go back up?
Some studies have shown that
GFR may increase over time in people
at all stages of kidney disease by: Controlling blood pressure. You can manage high blood pressure through exercise, diet, stress reduction, and limiting alcohol, among other lifestyle choices.
What are the symptoms of low GFR?
As kidney failure advances and the estimated glomerular filtration rate (eGFR) falls below 30 milliliters per minute per 1.73 meters squared, then more symptoms may manifest such as
nausea, vomiting, weight loss, poor appetite, itching, fluid weight gain, shortness of breath, lassitude and fatigue
.
What level of creatinine indicates kidney failure?
Doctors use the result of the creatinine blood test to calculate GFR, which is a more specific measure that can indicate chronic kidney disease. A GFR of 60 or over is considered normal, a GFR less than 60 may indicate kidney disease. A
level of 15 or less
is defined medically as kidney failure.
What does GFR tell you about kidney function?
A glomerular filtration rate (GFR) is a
blood test that checks how well your kidneys are working
. Your kidneys have tiny filters called glomeruli. These filters help remove waste and excess fluid from the blood. A GFR test estimates how much blood passes through these filters each minute.
