Abnormal Kidney Function Tests

Overview

A “kidney function test” panel usually includes serum creatinine, eGFR, blood urea, and electrolytes (sodium, potassium, chloride and bicarbonate). An abnormal result in any of these is a common reason for review, but the panel is read as a pattern rather than as isolated numbers — a raised creatinine with low eGFR points to reduced filtering, while an abnormal potassium or bicarbonate may point to a specific kidney-handling problem. This page gives the broader overview; High Creatinine, Low eGFR and Reduced Kidney Function cover the individual results in more detail.

What each part of the panel shows

• Creatinine and eGFR — overall filtering capacity.
• Blood urea — waste handling, though it is also affected by hydration and diet.
• Sodium — fluid and salt balance.
• Potassium — a critical level that the kidneys regulate; high or low values need attention.
• Bicarbonate — the acid–base balance the kidneys maintain.
• Chloride — read alongside sodium and bicarbonate.

Common reasons for an abnormal panel

• Dehydration or low fluid intake before the test.
• Chronic kidney disease from diabetes or high blood pressure.
• Medicines that affect kidney function or electrolytes.
• A urinary blockage or recent illness.
• Acid–base or salt-handling disorders.

Evaluation and investigations

After a repeat panel in controlled conditions, evaluation typically adds urine routine and ACR, blood sugar or HbA1c and a lipid profile, a complete blood count, and an ultrasound of the kidneys. Medicines are reviewed, since several common medicines affect electrolytes and creatinine. The pattern of abnormalities — not any single number — guides the next steps.

Management overview

Management is directed at the cause and the specific abnormality. Electrolyte disturbances are corrected carefully, often with medicine adjustment; a persistent fall in filtering capacity is managed as described on the Chronic Kidney Disease page. The panel is re-checked over time to confirm improvement.

Follow-up and monitoring

A repeat panel is arranged within a few weeks, and ongoing monitoring is set according to the abnormality and its cause. See Kidney Health Monitoring.

Warning signs — seek prompt care

• A very high or very low potassium level — can affect the heart and needs prompt assessment.
• A sudden, large rise in creatinine with reduced urine output.
• Persistent vomiting, drowsiness, palpitations or weakness with an abnormal panel.

How we help

Dr. Nayak reads the panel as a pattern, repeats it in controlled conditions, identifies the cause, and builds a plan that addresses both the filtering capacity and any electrolyte or acid–base disturbance. Consultations are available in-clinic in Bhubaneswar and over teleconsultation.

Related conditions and patient concerns

• High Creatinine
• Low eGFR
• Reduced Kidney Function
• Chronic Kidney Disease
• Abnormal Test Results