Private Urea and Electrolytes (U&E) Blood Test in London

Assess kidney function and monitor electrolyte balance with a fast and reliable blood test.

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What is a Urea and Electrolytes (U&E) Test?

A Urea and Electrolytes (U&E) blood test checks how well your kidneys are working and assesses your body's fluid and electrolyte balance. It is commonly used to detect kidney problems, dehydration, and electrolyte disturbances that can affect overall health.

The test typically measures:

  • Urea (a waste product filtered by the kidneys)
  • Creatinine (a marker of kidney function)
  • Electrolytes such as sodium, potassium, chloride, and bicarbonate
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Why is a U&E Test Important?

This test helps identify:

  • Early signs of kidney dysfunction
  • Electrolyte imbalances affecting heart and muscle function
  • Dehydration or fluid overload
  • Effects of medications like diuretics or ACE inhibitors
  • Risk factors associated with high blood pressure, diabetes, or heart disease

Who Should Consider a U&E Blood Test?

  • Individuals with high blood pressure, diabetes, or heart disease
  • People taking medications that can affect kidney function
  • Those with symptoms like fatigue, swelling, muscle cramps, or irregular heartbeat
  • Patients with a history of kidney disease
  • Anyone requiring a general health check

What Are Normal Reference Ranges for Urea and Electrolytes?

While exact values may vary slightly between laboratories, typical reference ranges are:

Parameter

Normal Range

Urea

2.5 – 7.8 mmol/L

Creatinine (male)

64 – 104 µmol/L

Creatinine (female)

49 – 90 µmol/L

Sodium

133 – 146 mmol/L

Potassium

3.5 – 5.3 mmol/L

Chloride

95 – 108 mmol/L

Bicarbonate (HCO3-)

22 – 29 mmol/L

These values serve as general guidelines. Test results are always interpreted in the context of your individual health, medications, and clinical history.

What Do Abnormal Results Mean?

  • High urea or creatinine may suggest kidney impairment or dehydration.
  • Low sodium (hyponatraemia) could be due to overhydration, medications, or hormonal disorders.
  • High sodium (hypernatraemia) often indicates dehydration or endocrine issues.
  • Abnormal potassium levels can affect heart rhythm and muscle strength.
  • Altered chloride or bicarbonate levels may reflect acid-base imbalances in the body.

Any abnormal findings will be explained clearly, with guidance on next steps if follow-up is needed.

About the Test

  • Simple blood sample
  • No special preparation required (unless advised otherwise)
  • Results available in 1 working day
  • Performed by trusted UK laboratories

Why Choose Health Screening Clinic?

  • Fast, accurate test results
  • Reliable laboratory analysis
  • Convenient London location
  • Clear result interpretation
  • Easy online booking process

Book Your Urea and Electrolytes Test Today

Monitor your kidney function and electrolyte balance with a quick and reliable blood test.

Book your private U&E test today at our London clinic.

BOOK AN APPOINTMENT 020 71833570

Frequently Asked Questions

Fasting is generally not required. Specific instructions will be provided if needed.

Your results will be ready within 1 working day.

We will explain your results in detail and advise you on appropriate follow-up if necessary.

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