Skip to content

Muscle and Renal Function Profile (Serum/Plasma)

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

This test measures key markers to assess how well your muscles and kidneys are functioning. It helps identify potential issues with muscle breakdown, kidney health, or electrolyte balance.

Quick summary

["Checks for muscle damage, kidney function, and electrolyte imbalances in a single panel."]

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

Key facts at a glance

LOINC
24905-2
Short code
MR Should
Synonyms
MR Should
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr
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 This Test Measures

Your blood sample will be analyzed for several substances, including creatine kinase (CK), which reflects muscle damage, and creatinine, which helps evaluate kidney function. Other possible analytes may include potassium, sodium, and phosphorus, depending on the specific tests included in your panel.

Why It’s Done

Doctors order this test to diagnose or monitor conditions like muscle injuries, kidney disease, electrolyte imbalances, or metabolic disorders. It’s also used before surgeries, during chemotherapy, or if you have symptoms like weakness, fatigue, or unusual swelling.

Common Conditions Monitored

This test can help detect or track conditions such as muscle disorders (e.g., myositis), kidney problems (e.g., chronic kidney disease), or metabolic imbalances (e.g., hyperkalemia). It may also be used to assess recovery after illness or injury.

Sample Preparation

A simple blood draw is all that’s needed. You’ll likely fast for 8–12 hours before your test, but your doctor will confirm any specific instructions. Avoid strenuous activity or excessive alcohol 24 hours before your appointment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Muscle & Kidney Function Panel

Frequently asked questions

What does elevated or low levels of these markers mean?
High levels of creatine kinase (CK) may indicate muscle damage from injury, exercise, or certain medications. Elevated creatinine could signal kidney problems, while abnormal potassium, sodium, or phosphorus levels may point to electrolyte imbalances or metabolic disorders. Always discuss results with your healthcare provider.
How long will results take?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your doctor will contact you with the full report once complete.
Can I eat or drink before this test?
Most tests require fasting for 8–12 hours before drawing blood. Check with your lab or doctor for any exceptions, as some tests may not need fasting.
  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