Kidney Tests

When Are Kidney Tests Prescribed?

Kidney tests help your doctor evaluate how well your kidneys are functioning and detect signs of kidney disease, infection, or damage. They may be recommended as part of routine health screenings or if you’re experiencing symptoms such as swelling in the hands or feet, changes in urination, fatigue, high blood pressure, or persistent lower back pain.

Your doctor may recommend kidney tests if you:

• Have diabetes or high blood pressure
• Have a family history of kidney disease
• Experience frequent urinary tract infections (UTIs)
• Notice blood or protein in your urine
• Have kidney stones or recurrent urinary problems
• Take medications that may affect kidney function
• Are over the age of 60 or have other risk factors for kidney disease

For healthy adults with no known risk factors, kidney tests are not usually required as part of routine annual screening but may be recommended during regular health checkups based on your age, medical history, and your doctor’s advice.

Why Are Kidney Tests Important?

Kidney tests help assess how effectively your kidneys filter waste, remove excess fluid, and maintain the balance of electrolytes in your body. They can detect kidney disease early, often before symptoms become noticeable, allowing timely treatment to prevent further damage.

Early diagnosis and proper management can help slow the progression of chronic kidney disease (CKD) and reduce the risk of complications such as high blood pressure, heart disease, and kidney failure.

Common kidney health tests can help identify:

• Chronic kidney disease (CKD)
• Acute kidney injury (AKI)
• Kidney infections
• Kidney stones
• Protein or blood in the urine
• Reduced kidney function

Maintaining good kidney health also involves managing important risk factors, including:

• Blood pressure
• Blood sugar levels
• Hydration
• Healthy body weight
• Balanced diet
• Regular physical activity
• Smoking habits
• Safe use of medications

How Is a Kidney Test Performed?

Most kidney tests involve a simple blood test and a urine test. A healthcare professional collects a blood sample from a vein in your arm to measure markers such as creatinine and estimate your glomerular filtration rate (eGFR). You may also be asked to provide a urine sample to check for protein, blood, or other abnormalities.

You may feel a brief sting during the blood draw, and the entire process usually takes less than five minutes. Urine samples are collected in a sterile container and sent to the laboratory for analysis.

If further evaluation is needed, your doctor may recommend additional investigations such as a kidney ultrasound, CT scan, or other imaging tests to assess the structure and health of your kidneys.

How Long Do Kidney Test Results Take? Next Steps Explained

Once you book kidney tests online and complete the required blood and urine samples, results are typically available within 24 hours, although some specialised tests may take longer.

After reviewing your results:

• If your kidney test results are normal, your doctor may recommend maintaining a healthy lifestyle and routine monitoring if required.
• If abnormal kidney function or urine test results are found, further testing may be needed to identify the underlying cause.
• Depending on the findings, you may be referred to a nephrologist for further evaluation and treatment.

Based on your results, your doctor may recommend one or more of the following:

• No changes to your current treatment plan
• Repeat kidney function tests after a specified period
• Lifestyle modifications, including dietary and hydration changes
• Better management of blood pressure or diabetes
• Medication adjustments
• Additional imaging or specialised kidney tests
• Regular follow-up appointments to monitor kidney function