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Serum or Plasma Substance Concentration (Electrochemiluminescence Immunoassay) for a Specific Protein Marker

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

This test measures the level of a specific protein in your blood, often used to assess certain conditions or monitor treatments.

Quick summary

["Your blood protein levels can help doctors diagnose or track health conditions like kidney disease, infections, or autoimmune disorders."]

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

Key facts at a glance

LOINC
73914-4
Short code
JWH-018 Ur Ql Cfm
Synonyms
JWH-018 Ur Ql Cfm
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order this test to check for abnormal protein levels that could indicate health issues such as kidney problems, liver disease, or certain cancers. It can also help monitor how well a treatment is working.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves fasting-related proteins. Bring any medications or supplements you’re taking to your appointment.

During the Test

A healthcare provider will draw blood from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. The blood sample is then sent to a lab for testing.

What the Results Mean

Results are compared to a standard range, but exact values can vary by lab. High or low levels may signal underlying health concerns that need further evaluation, such as additional tests or doctor follow-up.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Elevated or low protein levels can signal conditions like chronic kidney disease, protein-losing syndromes, or certain inflammatory diseases. This test helps guide treatment decisions by providing objective data on protein metabolism.

Short name

Protein Marker Test (ECLIA)

Frequently asked questions

What causes abnormal protein levels in this test?
Abnormal results may be linked to conditions like kidney disease, liver problems, infections, or autoimmune disorders. Lifestyle factors (e.g., diet, hydration) or medications can also influence protein levels.
How soon will I get my results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will discuss them with you during your follow-up visit.
Can I eat or drink before this test?
Most tests don’t require fasting, but follow your doctor’s instructions if they specify dietary restrictions for this particular protein marker.
  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