GFR With Cystatin C Serum

The GFR with Cystatin C Serum test is done:

• To evaluate kidney function in individuals with chronic kidney disease (CKD).
• To monitor kidney function in individuals with diabetes, hypertension, or other conditions that can cause kidney damage.
• To estimate glomerular filtration rate (GFR) more accurately than with creatinine-based methods, especially in individuals with low muscle mass or abnormal creatinine metabolism.
• To detect early stages of kidney disease, when creatinine-based methods may not be sensitive enough.
• To assess kidney function in individuals with suspected acute kidney injury (AKI).
• To assess kidney function before and after kidney transplant.
• To evaluate the effect of medications on kidney function.
• To assess kidney function in individuals with suspected kidney disease due to autoimmune disorders, such as lupus or vasculitis.

The GFR with Cystatin C serum test is a blood test that measures the estimated glomerular filtration rate (eGFR) using the Cystatin C marker.

The results of the test are reported as a GFR value in milliliters per minute per 1.73m² of body surface area, and this value is used to stage kidney disease.

If the results of the GFR with Cystatin C serum test are abnormal, it could indicate kidney dysfunction or disease.

The test involves drawing a small amount of blood from a vein in your arm. A healthcare professional will clean the area with an antiseptic, wrap an elastic band around your upper arm to make the veins more visible, and insert a needle into a vein to collect the blood sample. You may feel a brief prick or stinging sensation when the needle is inserted, but the procedure is generally painless.

No special preparation is required for the test. However, it is recommended that you consult with your healthcare provider before taking the test, as they may have specific instructions or recommendations based on your individual medical history and current health status.

The GFR With Cystatin C Serum test may be ordered for individuals who are at risk of developing kidney disease or who are already experiencing symptoms such as:

• High blood pressure
• Diabetes
• Family history of kidney disease
• History of kidney infections or kidney stones
• Swelling of the ankles, feet, or hands
• Fatigue
• Loss of appetite
• Nausea and vomiting
• Changes in urination, such as frequent urination or difficulty urinating.

There are several blood tests that may be ordered along with GFR with Cystatin C serum test:

• Creatinine test: Creatinine is a waste product produced by the muscles and is filtered out of the body by the kidneys. Creatinine levels in the blood are measured to assess kidney function.
• Blood urea nitrogen (BUN) test: BUN is another waste product that is filtered by the kidneys. BUN levels in the blood can indicate how well the kidneys are functioning.
• Urinalysis: A urinalysis can detect abnormalities in the urine, such as protein or blood, which can be an indication of kidney disease.
• Electrolyte panel: An electrolyte panel measures the levels of minerals such as sodium, potassium, and chloride in the blood. Abnormal levels can indicate kidney dysfunction.
• Complete blood count (CBC): A CBC measures the number of blood cells in the body. Abnormal levels can indicate kidney disease.
• Glucose test: A glucose test measures the level of sugar in the blood. Abnormal levels can indicate diabetes, which can lead to kidney disease.

Cystatin C GFR test

CysC GFR test