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?
Measures kidney function by detecting creatinine levels in blood.

Why is the test ordered?
To assess kidney health and diagnose kidney disease or damage.

How is the test performed?
Blood sample drawn from a vein, usually in the arm.

What is creatinine?
Waste product from muscle metabolism.

Is fasting required before the test?
No, typically not required.

Are there any risks associated with the test?
Minimal risk of bleeding or bruising at needle site.

How long does it usually take to get results?
Usually within 1-2 days.

What do abnormal results indicate?
Kidney disease, damage, or impaired function.

Can medications affect test results?
Yes, certain medications can alter creatinine levels.

Is the test painful?
Mild discomfort from needle prick.