
Electrolytes & Urea
£99


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Biomarkers Included with the Electrolytes & Urea blood test
Scroll down for more information about each biomarker
Sodium
Potassium
Chloride
Bicarbonate
Urea
Creatinine
Why choose us for your Electrolytes & Urea
About the Electrolytes & Urea blood test
An electrolyte test is a blood test that measures if there’s an electrolyte imbalance in the body. Electrolytes are salts and minerals, such as sodium, potassium, chloride and bicarbonate, which are found in the blood. They can conduct electrical impulses in the body.
Biomarker information for Electrolytes & Urea blood test
Sodium is a type of electrolyte. Electrolytes are electrically charged minerals that help maintain fluid levels and the balance of chemicals in your body called acids and bases.
A potassium test measures the amount of potassium in blood serum, the fluid part of your blood. Potassium is a mineral that helps: nerves and muscles “communicate” nutrients move into cells and waste products move out of cells.
A chloride blood test measures the amount of chloride in your blood. Chloride is a type of electrolyte. Electrolytes are electrically charged minerals that help control the amount of fluids and the balance of acids and bases (pH balance) in your body.
The bicarbonate test gives a rough estimate of your acid-base balance. This is usually sufficient, but measurements of gases dissolved in the blood (blood gases) may be done if more information is needed
Urea is a waste product produced by the body when it breaks down proteins in the liver. Once the urea is made, it is transported to the kidneys, which filter it out of the blood and remove it from the body in the form of urine. Measuring the levels of urea in the blood can therefore reflect how well both the liver and the kidneys, are functioning. It is important to note that even if one kidney is severely damaged but the other is functioning perfectly, results may still return as normal.
Creatinine is a chemical waste molecule that is produced from normal muscle metabolism. Levels of creatinine indicate the levels of other waste products in the body. Creatinine is also an accurate marker of kidney function, and may help in diagnosing kidney disease.
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What does the Electrolytes & Urea blood test involve?
This blood test is just like a standard blood test.
You will be asked to uncover you left or right arm and suitable vein is found. A tourniquet will be placed and tightened around your upper arm allowing the veins to swell and a needle will be placed into your vein. A small quantity of blood is then drawn into tubes. Once the procedure is complete a small plaster will be placed onto the site which can be removed after a few hours.
How do I prepare
- The blood test requires access to the area of interest, therefore, it is recommended to wear loose clothing to facilitate this process.
- If you are unsure about the preparation, please contact us for further information.
How to find us
We pride ourselves on providing the best quality service we can which is why we are trusted by GP's, doctors, physiotherapists, midwives and many other healthcare professionals.
Our mission of better quality healthcare for everyone is at the heart of everything we do and drives us to do the best we can for each and every patient that we see. Our team of experts have years of experience and are fully registered and regulated meaning you are in safe hands with us.
Electrolytes & Urea FAQ's
Important Notes
- We may require details of your GP / Health Care Professional before or at the time of the test.
- Our London East clinic is located on the first floor, up one flight of stairs. Please note that we don’t have a lift available at this location.
- Blood results require interpretation. All results should be interpreted by your regular health care professional / GP.
- All of our first-line tests are optional and provided on a self-referral basis. You must be aged 16 years or over to use this service. If you have an existing medical condition, are undergoing treatment, or have any concerns about whether this test is appropriate for you, we recommend that you consult your GP or healthcare professional before booking.
- We kindly ask that you inform us of any specific requirements, reasonable adjustments, cultural considerations, or practitioner preferences before your appointment. Whilst we will make every reasonable effort to accommodate requests, this may not always be possible at short notice or subject to staff availability.


