Description
Serum, NA, Fasting or Non Fasting: As suggested by doctor
Sample Required:
The cystatin-C serum test requires a blood sample, typically obtained through a vein in your arm.
Test Time:
The results of the tests are usually available within a few days of the blood sample being obtained.
Test Normal Range:
The normal range for cystatin-C levels in the blood can vary between laboratories, but it is typically around 0.53 to 0.95 milligrams per deciliter (mg/dL).
What is the Test?
The cystatin-C serum test measures the concentration of cystatin-C in your blood. Cystatin-C is a protein that is produced by the majority of cells in the body and filtered by the kidneys. This test is primarily used as a marker of kidney function and can provide information about your overall kidney health.
Test Procedure:
A healthcare provider will clean the area, usually the inside of your elbow, and insert a needle to draw a blood sample. After that, the blood sample is transported to a laboratory for analysis. In the laboratory, the blood sample is tested to measure the concentration of cystatin-C.
When to Take the Test:
The cystatin-C serum test is often used when there is a need to assess kidney function, especially in situations where creatinine-based tests may not provide accurate results. Your healthcare provider may recommend this test if you have kidney disease, are at risk for kidney problems, or are being monitored for kidney function.
Who Should Take This Test:
Individuals with known or suspected kidney disease. Those with conditions that may affect kidney function, such as diabetes or high blood pressure. People taking medications that can potentially harm the kidneys. Individuals undergoing evaluation for overall kidney health.
Precautions for Exceptional Cases (Pregnancy, etc.):
There are generally no specific precautions related to pregnancy for the cystatin-C serum test. However, if you are pregnant or have specific medical conditions, inform your healthcare provider, as they may consider additional factors when interpreting the results.
FAQs (Frequently Asked Questions):
Q1: How does the cystatin-C test differ from creatinine-based tests for kidney function?
A: Cystatin-C is less influenced by factors like age, muscle mass, and diet compared to creatinine. It can sometimes provide a more accurate assessment of kidney function.
Q2: Can the cystatin-C test diagnose specific kidney diseases?
A: While it can indicate kidney dysfunction, additional tests and clinical evaluation are often needed to diagnose specific kidney diseases.
Q3: Is fasting required before taking the cystatin-C test?
A: Fasting is generally not required before this test.
Q4: Can the cystatin-C test be used to monitor kidney function over time?
A: Yes, it can be used for ongoing monitoring of kidney function and to assess changes in kidney health.
Q5: Are there any medications that can affect cystatin-C levels?
A: Some medications, especially those that affect kidney function, can influence cystatin-C levels. Inform your doctor about whatever medications you are taking.
