AsseyMethod: Photo Colorimetric
Abbrevation: Cu
Sector: Biochemistry
SampleType: S,PH
S.Vol: -
Transport: at 2-8˚c, -20˚c
Storage: 1 week at 2-8˚c for longer time at -20˚
Test Name: Copper
Normal Range: male 80-140 Female 80-155 Newborn 12-67 children: 30-150
To measure the amount of copper in the blood, urine, or liver; to help diagnose and monitor Wilson’s disease; sometimes to identify copper deficiencies and excesses
When you have jaundice, fatigue, abdominal pain, behavioural changes, tremor, or other symptoms that your doctor thinks may be due to Wilson’s disease or, rarely, to copper deficiency or excess; at intervals when you are being treated for a copper-related condition
A blood sample taken from a vein in your arm and/or a 24-hour urine sample; sometimes a liver biopsy sample
No test preparation is needed
This test measures the amount of copper in the blood, urine, or liver (hepatic). Copper is an essential mineral that the body incorporates into enzymes. These enzymes play a role in the regulation of iron metabolism, formation of connective tissue, energy production at the cellular level, the creation of melanin, and the function of the nervous system and brain.
Copper is found in many foods including nuts, chocolate, mushrooms, shellfish, whole grains, dried fruits, and liver. Drinking water may acquire copper as it flows through copper pipes, and food may acquire it when people cook or serve food in copper dishes. Normally, the body absorbs copper from the intestines, makes it non-toxic by binding it to a protein, and transports it to the liver. The liver stores some of the copper and binds most of the rest to a protein called apocaeruloplasmin that, when copper is attached, becomes the enzyme caeruloplasmin. About 95% of the copper in the blood is bound to caeruloplasmin. The liver excretes excess copper into the bile and it is removed from the body in the stool. Some copper is also excreted in the urine.
Both excesses and deficiencies of copper are rare. Wilson’s disease, an inherited disorder, can lead to excess storage of copper in the liver, brain, and other organs. This can cause tissue damage and signs and symptoms such as:
- anaemia
- nausea, abdominal pain
- jaundice
- fatigue
- behavioural changes
- tremor
- ifficulty walking and/or swallowing
- dystonia
If the kidneys are involved, then urine production may be decreased or absent. Some of these symptoms may also be seen with copper poisoning that is due to acute or chronic environmental exposure to copper or due to conditions such as liver disease or obstructions that prevent or inhibit copper metabolism and excretion.
Copper deficiencies may occasionally occur in patients who have conditions associated with severe malabsorption, such as and , and in infants exclusively fed cow-milk formulas. Findings may include reduced white blood cells, , and microcytic anaemia. A rare X-linked genetic condition called Menkes kinky hair syndrome leads to copper deficiencies in the brain and liver of affected infants. The disease, which affects primarily males, is associated with seizures, delayed development, abnormal artery development in the brain, and unusual grey brittle kinky hair.
How is the sample collected for testing?
A blood sample is obtained by inserting a needle into a vein in the arm and/or a 24-hour urine sample is collected. Sometimes a doctor performs a liver biopsy.
Is any test preparation needed to ensure the quality of the sample?
No test preparation is needed.