Serum Creatinine Test

The serum creatinine test is a laboratory test used to measure the level of creatinine in the blood. Creatinine is a waste product that is produced by the muscles and filtered out of the blood by the kidneys.

Purpose of the Test

The purpose of the serum creatinine test is to assess kidney function. The test can help diagnose and monitor conditions such as:

• Chronic kidney disease (CKD)
• Acute kidney injury (AKI)
• Kidney failure
• Nephrotic syndrome
• Nephritic syndrome

How the Test is Performed

A blood sample is drawn from a vein in the arm and sent to a laboratory for analysis. The test measures the level of creatinine in the blood, which is then compared to a normal range.

Normal Range

The normal range for serum creatinine varies depending on age, sex, and body size. Generally, the normal range is:

• 0.6-1.2 milligrams per deciliter (mg/dL) for adult men
• 0.5-1.1 mg/dL for adult women
• 0.3-0.7 mg/dL for children

Abnormal Results

An abnormal result may indicate:

• Kidney disease or damage
• Dehydration
• Muscle disease or injury
• Certain medications, such as antibiotics or chemotherapy

Risk Factors and Precautions

Certain factors can affect the accuracy of the test results, including:

• Pregnancy
• Recent muscle injury or surgery
• Certain medications, such as diuretics or ACE inhibitors
• Dehydration or overhydration

Interpretation of Results

The results of the serum creatinine test should be interpreted by a healthcare professional in conjunction with other laboratory tests and medical history. A single abnormal result may not necessarily indicate kidney disease, but rather may require further testing to determine the cause.

Frequently Asked Questions (FAQs)

What is a serum creatinine test?
A blood test that measures the level of creatinine in the blood.

Why is a serum creatinine test performed?
To assess kidney function and diagnose kidney disease or damage.

What is creatinine?
A waste product from the normal breakdown of muscle tissue.

How is the test performed?
A blood sample is taken from a vein, usually in the arm.

Is fasting required before the test?
Typically not required, but may be needed in some cases.

What are normal serum creatinine levels?
Vary by age, sex, and lab, but generally around 0.6-1.2 mg/dL for adults.

What do high serum creatinine levels indicate?
May indicate kidney disease, damage, or impaired function.

Can serum creatinine levels be affected by other factors?
Yes, such as muscle mass, diet, and certain medications.

Are there any risks associated with the test?
Minimal risks, including bruising, bleeding, or infection at the needle site.

How long does it usually take to get the test results?
Typically several hours to a few days, depending on the lab.