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HEAVY METALS

What are Heavy Metals?

Heavy metals, like arsenic, lead, mercury, and others,are all around us. They’re in the ground we walk on, in the water we drink, and in the products we use every day. But high levels of most heavy metals are potentially toxic.QLS offers a comprehensive heavy metals panel in-house that helps physicians screen patients for a variety of medical conditions. Click on the following link to learn more about the testing options available!

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1139 Cystatin C

Components

	NAME	METHOD	REFERENCE RANGE	UNITS
	Cystatin C	NEPH	0.53 - 0.95	mg/L

Specimen Requirements

	TYPE	VOLUME	TEMPERATURE	INSTRUCTIONS
PRIMARY
1	Serum	1 (0.8) mL	Ambient - 7 Day(s), Refrigerated - 7 Day(s), Frozen - 2 Month(s)
ALTERNATE
	Plasma Heparinized	1 (0.8) mL	Ambient - 7 Day(s), Refrigerated - 7 Day(s), Frozen - 2 Month(s)

Clinical utility

Cystatin C is a cysteine proteinase inhibitor. It is formed at a constant rate and freely filtered by the healthy kidney; this protein is a good marker of renal function. Serum concentrations of Cystatin C are almost totally dependent on the glomerular filtration rate (GFR). A reduction in the GFR causes a rise in the concentration of Cystatin C.

Collection Instruction

Avoid repeated freeze-thaw cycles, Lipemic samples must be clarified
by centrifugation prior to testing.

Reported: Same day

CPT Code: 82610

Notes: Cystatin C has not been shown to be affected by factors such as muscle mass and nutrition, factors which have been demonstrated to affect creatinine values. In addition, a rise in creatinine does not become evident until the GFR has fallen by approximately 50%.