What is the normal range for cystatin C?

The range for cystatin C is 0.67-6.15 mg/l, 0.66-7.23 mg/dl for creatinine and 8.9-186.3 l/day (6.2-129.4 ml/min) for creatinine clearance. Serum cystatin C levels started to increase over normal range when creatinine clearance fell below 135.9 l/day (94.4 ml/min), while serum creatinine remained within normal ranges.

What is creatinine blind area?

What is the “creatinine-blind area”? Serum creatinine values are not a direct measure of GFR. GFR can be reduced by as much as 50% while the serum creatinine value is still within the normal range – this is the “creatinine-blind area”.

When can you buy cystatin C?

When is cystatin C used to estimate GFR? A cystatin C blood test can be helpful if: A previous test for kidney function was inconclusive or needs to be confirmed. In this instance, your healthcare provider may give you cystatin C test to confirm whether or not you have kidney disease.

What is a serum cystatin C?

Serum cystatin C is a non-glycosylated, 13.3-kDa protein belonging to cystatin protease inhibitors. It has shown promise as a replacement for serum creatinine in estimation of GFR. [4,5] After glomerular filtration, it is fully catabolized in the proximal renal tubule and is not returned to blood.

What is another name for serum cystatin C?

Cystatin C or cystatin 3 (formerly gamma trace, post-gamma-globulin, or neuroendocrine basic polypeptide), a protein encoded by the CST3 gene, is mainly used as a biomarker of kidney function. Recently, it has been studied for its role in predicting new-onset or deteriorating cardiovascular disease.

How do you lower cystatin C naturally?

Lose weight if overweight. It may help bring down your cystatin C levels [85]. Smoking is associated with higher cystatin C levels. Quitting may help lower your levels, while supporting your overall health [85].

What does cystatin C do?

Cystatin C is a low molecular-weight protein (13,000 Da) that is produced by all nucleated cells and acts to inhibit cysteine proteases. It has been used as an estimate of the severity of CKD because a high level of cystatin C is associated cardiovascular disease and may even be more closely associated than SCr.

How does cystatin C work?

Cystatin C is a protein that is produced by the cells in your body. When kidneys are working well, they keep the level of cystatin C in your blood just right. If the level of cystatin C in your blood is too high, it may mean that your kidneys are not working well.

Is cystatin C test expensive?

And while a cystatin C test may currently cost more than a serum creatinine assay, the price of the former is not prohibitive. At Karger’s institution, the University of Minnesota, a serum creatinine test costs about $2.50, while a cystatin C assay runs about $10.60.

How much does a cystatin C test cost?

Cystatin C test cost is between $55.75 and $310.42 This laboratory test is available in 6 online lab test stores.

What is cystatin C and why is it important?

What is cystatin C? Cystatin C is a protein that is produced by the cells in your body. When kidneys are working well, they keep the level of cystatin C in your blood just right. If the level of cystatin C in your blood is too high, it may mean that your kidneys are not working well. A blood test for cystatin C can help your healthcare provider

What is cystatin C and how is it used to measure GFR?

Like creatinine, the cystatin C number is used in a math formula with your age, race, and gender to estimate your GFR. The cystatin C test is not the usual or regular way that your healthcare provider will estimate your GFR. But it can be very helpful in some instances. When is cystatin C used to estimate GFR?

What is the difference between serum creatinine and serum cystatin C levels?

Serum levels of cystatin C are a more precise test of kidney function (as represented by the glomerular filtration rate, GFR) than serum creatinine levels. 22–23 Lesley A. Inker MD, MS, Andrew S. Levey MD, in Chronic Kidney Disease, Dialysis, and Transplantation (Fourth Edition), 2019