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Serum/plasma maximum rate of change of uric acid concentration (rate of uric acid increase)

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

This test measures how quickly your uric acid levels rise in your blood over time. Uric acid is a waste product from your body’s natural processes and can build up if your kidneys don’t remove it efficiently.

Quick summary

["This test helps assess kidney function and potential risk for conditions like gout."]

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

Key facts at a glance

LOINC
29454-6
Short code
PV-RU Vmax sys DOP
Synonyms
PV-RU Vmax sys DOP
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-doppler
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 symptoms like joint pain, kidney issues, or if you’re at higher risk for gout or kidney stones. It can also be used to monitor treatment effectiveness for conditions affecting uric acid metabolism.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours before the test if serum/plasma is used. Bring any medications you’re currently taking to your appointment.

How the Test Works

A small blood sample is drawn from a vein, usually in your arm. The sample is then analyzed to measure how uric acid levels change over a defined period, often using advanced laboratory techniques like enzymatic methods.

What the Results Mean

Results show the maximum rate of uric acid increase, which helps determine if uric acid is accumulating too quickly. High rates may indicate kidney problems or metabolic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Uric Acid Rate of Increase

Frequently asked questions

What does a high or low rate of uric acid increase mean?
A high rate may suggest your kidneys aren’t filtering uric acid efficiently, which could lead to long-term issues like kidney stones or gout. A low rate might indicate normal processing, but it’s not definitive on its own.
Does diet affect this test?
Diet can influence uric acid levels, but this specific test focuses on the rate of change. Avoiding high-purine foods (like red meat or shellfish) for a few days before testing may help provide clearer results.
Is this test painful?
The blood draw is brief and may cause mild discomfort, but most people tolerate it well. You can ask your healthcare provider about numbing cream if you’re concerned.
  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