Kidney Function
A focused kidney blood test measuring creatinine, eGFR and urea to provide a concise assessment of renal filtration and waste clearance.
Turnaround time
1 day
Biomarkers count
3
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Overview of the Kidney Function Test
The Kidney Function test is a focused three-biomarker blood profile assessing Creatinine, estimated Glomerular Filtration Rate (eGFR) and Urea.
The kidneys filter waste products from the blood, regulate fluid balance and perform several other important physiological functions.
Creatinine and Urea are waste products that can provide useful information about renal function when interpreted alongside the individual's age, hydration, muscle mass, medication and medical history.
eGFR is calculated using the Creatinine result together with relevant patient information to estimate how effectively the kidneys are filtering blood.
No single kidney marker should be interpreted in isolation.
A result outside the laboratory reference range may require repeat testing, urine testing or additional clinical assessment depending on the circumstances.
The Kidney Function test costs £79.
What Does the Kidney Function Test Check?
The Kidney Function test provides a concise assessment of renal filtration and circulating waste products. This test measures 3 biomarkers.
Creatinine
Measures a waste product produced from normal muscle metabolism and used as an important marker when assessing kidney filtration.
eGFR
Provides an estimated Glomerular Filtration Rate calculated from Creatinine and relevant patient information to assess renal filtration.
Urea
Measures a nitrogen-containing waste product formed during protein metabolism and removed primarily through the kidneys.
Who May Benefit From the Kidney Function Test?
The Kidney Function test may be useful for people who want a focused assessment of renal filtration or who require monitoring because of medical history, medication or previous blood results.
People with previously abnormal kidney results - Repeat Creatinine, eGFR and Urea testing can help monitor change over time.
People taking medicines that may require kidney monitoring - Renal function is relevant when prescribing or monitoring several types of medication.
People with diabetes or high blood pressure - These conditions can be associated with increased risk of kidney disease.
People with a family history of kidney disease - Screening may be considered as part of a broader health assessment.
People experiencing changes in hydration or general health - Kidney-related biomarkers can change with illness, fluid balance and other physiological factors.
People undergoing routine health monitoring - The profile provides a concise kidney-function baseline.
How to Prepare
Creatinine can be influenced by factors other than kidney disease, including muscle mass, hydration and recent strenuous exercise.
Persistent abnormalities should therefore be interpreted in context.
Symptoms and Reasons to Consider the Kidney Function Test
Early kidney impairment may not cause obvious symptoms, which is why blood testing can be useful when risk factors are present.
Previously reduced eGFR - Repeat testing may help establish whether a reduction is persistent.
Raised Creatinine on a previous blood test - Follow-up testing may be recommended.
Changes in urination - Persistent changes in frequency, volume or appearance should receive appropriate medical assessment.
Swelling of the ankles, feet or around the eyes - Fluid retention can have several causes and may warrant kidney assessment.
Persistent fatigue or reduced wellbeing - These symptoms are non-specific but may justify broader investigation.
Monitoring during certain medical treatments - Kidney function may need to be checked before or during some medicines or therapies.
Severe reduction in urine output, significant swelling, breathlessness, confusion or acute illness requires prompt medical assessment rather than relying on routine private blood testing.
How to Book Your Kidney Function Test
The Kidney Function test can be booked privately with professional venous blood collection.
Choose the Kidney Function Test
Select the £79 three-biomarker profile.
Select your sample collection option
Choose in-clinic phlebotomy (+£35) or a home visit from a phlebotomist (+£60).
Attend your appointment
A trained healthcare professional collects the required blood sample.
Laboratory analysis
Creatinine and Urea are measured and eGFR is calculated.
Receive your results securely
Your Kidney Function results are returned securely after laboratory analysis.
When Will I Receive My Results?
Results are generally expected within approximately 1 day.
Turnaround begins once the sample has entered laboratory processing.
Occasionally, repeat analysis or other laboratory requirements can extend reporting.
Understanding Your Results
Creatinine, eGFR and Urea should be interpreted together and alongside relevant clinical information.
A higher Creatinine result can be associated with reduced kidney filtration but can also be influenced by muscle mass, dehydration and other factors.
A lower eGFR can indicate reduced estimated kidney filtration.
One isolated eGFR result does not necessarily establish chronic kidney disease because persistent changes over time and other investigations may be required.
Urea can be affected by kidney function, hydration and protein metabolism.
Where results are significantly abnormal or changing, clinical review may be appropriate.
Why Book With London Blood Tests?
London Blood Tests provides a focused and accessible kidney-function profile for private monitoring.
Three core kidney markers - Creatinine, eGFR and Urea are included.
Focused testing - The profile is suitable when a full wellness panel is not required.
Fast laboratory turnaround - Results are generally expected within approximately one day.
Professional sample collection - Choose in-clinic phlebotomy (+£35) or a home visit from a phlebotomist (+£60).
Useful for repeat monitoring - Previous and current results can be compared over time.
Clear pricing - The Kidney Function test costs £79.
Private Kidney Function Blood Test in London
London Blood Tests provides the private Kidney Function blood test for £79.
The profile measures Creatinine, eGFR and Urea.
These markers provide useful information about renal filtration and waste clearance and can be used for routine assessment or monitoring.
Results are generally expected approximately one day after laboratory processing begins.