What is Creatinine in Blood Test?

Creatinine is a waste product that the muscles produce as they break down. It gets filtered out of your blood by the kidneys, and then excreted in your urine. A creatinine test measures the creatinine level in your blood to see how healthy your kidneys are working.

Creatinine levels can be affected by certain medications, dehydration, or even kidney disease. This information can help to determine if there’s something wrong with you or if it’s just normal health issues like aging or diet changes. The only way to know for sure what’s going on is by seeing a doctor for an exam!

What is Creatinine in Blood Test?

Creatinine is a waste product that the muscles produce as they break down. It gets filtered out of your blood by the kidneys, and then excreted in your urine. A creatinine test measures the creatinine level in your blood to see how healthy your kidneys are working.

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The body breaks down creatine, a chemical stored in muscle cells, into creatinine — which is excreted through urination. A simple blood or urine test can measure levels of both compounds at once to get an idea of how well the kidneys are performing. Although doctors sometimes order these tests separately — especially if someone’s symptoms seem more kidney-related than muscle-related — a creatinine test can serve as a useful barometer of your problem’s severity. If there’s more creatine than normal in the blood, you may be at risk for serious kidney disease or damage.

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Creatinine tests are often used to:

– Check people who have been diagnosed with kidney disease. The results can tell if treatment is working and how well their kidneys are functioning.

– Check whether someone who has had an injury involving the muscles (myopathy) has any muscle disorders that might affect kidney function.

– Check people at risk of developing chronic kidney disease because they have high blood pressure or diabetes, take drugs that harm the kidneys, or have family members with early signs of chronic kidney disease.

– Monitor people who appear to be well but have had one or more episodes of acute kidney injury.

– Monitor people taking drugs that might affect kidney function (e.g., chemotherapy, immunosuppressants and certain antibiotics).

The creatinine test is often ordered along with the blood urea nitrogen (BUN) test. Blood levels of both substances are used to find out if your kidneys are working properly. For example, doctors may order this test for people who have symptoms that suggest they have problems with their kidneys or urinary tract — such as swelling, decreased urine output, nausea, vomiting, muscle cramping and fatigue. The results can also help determine whether someone needs further testing for a kidney.

Some medications interfere with creatinine levels. These can include ACE inhibitors, aspirin, birth control medications, estrogen replacement therapy and nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen. This test may not provide accurate results when you are taking these drugs or have taken them within the past few days.

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