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Conductivity, Serum/Plasma (Electrical Conductance Measurement)

Published: August 9, 2026Updated: August 16, 2026

This test measures how well your blood or serum conducts electricity, reflecting the balance of electrolytes like sodium, potassium, and chloride in your blood.

Quick summary

["Electrolyte balance and kidney function can be indirectly assessed through blood conductivity."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
8608-2
Short code
Conduction Imp EKG
Synonyms
Conduction Imp EKG
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ekg
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does Conductivity Measure?

Conductivity is influenced by the concentration of dissolved ions (electrolytes) in your blood. Higher electrolyte levels, such as sodium or chloride, increase electrical conductivity, while lower levels decrease it. This test is often used as part of broader electrolyte or kidney function evaluations.

Why Might Your Doctor Order This Test?

Your doctor may request this test if they suspect issues like dehydration, kidney problems, or imbalances in electrolytes. It can also be part of routine monitoring for patients on certain medications or those with chronic conditions like heart disease or high blood pressure.

How Is the Test Performed?

A small blood sample is drawn from your arm, typically using a needle. The serum or plasma is then analyzed in a lab to measure electrical conductivity.

What Are Common Results and Their Implications?

While exact reference ranges vary by lab, abnormal conductivity levels may indicate electrolyte imbalances or kidney dysfunction. For example, very low conductivity might suggest dehydration or kidney failure, while very high levels could signal overhydration or certain metabolic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Role in Diagnosis and Monitoring

Short name

Conductivity

Frequently asked questions

What Causes Abnormal Conductivity Results?
Abnormal conductivity can result from conditions like dehydration, kidney disease, heart failure, or excessive use of diuretics. It may also be influenced by certain medications or metabolic disorders.
How Often Should This Test Be Done?
The frequency depends on your health status. Routine tests may not be standard unless you have a condition that affects electrolytes or kidney function. Your doctor will determine the best schedule for you.
Can Diet or Lifestyle Affect Conductivity Results?
Yes, diet, hydration status, and certain medications can impact electrolyte levels and, consequently, conductivity. Avoiding excessive salt, alcohol, or diuretics before the test may help ensure accurate results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy