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Foot and Ankle Pain Protein Profile (Screening) with Electrophoresis

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

This test measures protein levels in a sample of your foot or ankle fluid using electrophoresis to help identify potential causes of swelling, pain, or inflammation in that area.

Quick summary

["Electrophoresis helps pinpoint abnormal protein patterns that may signal conditions like infection, injury, or autoimmune disorders in the foot/ankle region."]

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

Key facts at a glance

LOINC
39076-5
Short code
XR Foot AP+Obl
Synonyms
XR Foot AP+Obl
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
CPT
86430
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have persistent foot or ankle pain, swelling, or redness that doesn’t improve with standard treatments. It can also help evaluate conditions like gout, tendonitis, or rare inflammatory disorders affecting the extremities.

What to Expect Before the Test

No special preparation is needed. A small sample of fluid may be collected from your foot or ankle using a needle or aspiration technique. You might feel slight discomfort, but it’s usually brief.

What the Test Results Mean

Electrophoresis separates proteins into bands based on size and charge. Abnormal patterns could indicate high levels of certain proteins (e.g., acute-phase reactants) that signal inflammation, infection, or tissue damage in the foot/ankle area.

Common Conditions This Test Helps Diagnose

This screening may help identify conditions such as synovitis (joint inflammation), crystal-induced arthritis (e.g., gout), or rare connective tissue disorders affecting the lower extremities.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Foot/Ankle Pain Protein Profile (Screen)

Frequently asked questions

Will this test show if I have arthritis in my foot or ankle?
This test can help identify protein patterns that may suggest inflammation or crystal deposits (like in gout), but it’s not a definitive arthritis test. Additional imaging or blood tests may be needed for a full diagnosis.
What if my fluid test shows unusual protein bands?
Unusual bands could mean your body is responding to injury, infection, or an autoimmune process. Your doctor will discuss next steps, which may include more tests or treatments tailored to the specific protein pattern found.
Can I take pain relievers before this test?
It’s best to avoid nonsteroidal anti-inflammatory drugs (like ibuprofen) for 48 hours before the test, as they might affect protein levels in the fluid. Always follow your provider’s specific instructions.
  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