Erythrocyte Uptake Rate (for certain radiopharmaceuticals, e.g., technetium-99m-labeled red blood cells)
This test measures how quickly your red blood cells take up a radioactive tracer, often used to assess blood flow or circulation in specific body areas.
["Helps doctors evaluate blood flow in areas like the brain or liver after injection of a radioactive substance."]
Key facts at a glance
- LOINC
- 32970-6
- Short code
- Eruption XR
- Synonyms
- Eruption XR
- Category
- coagulation
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- xr
- CPT
- 85610
- SNOMED
- 396252006
- 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 Is This Test Used For?
Doctors may order this test to check how well blood circulates to certain organs or tissues, such as the brain, liver, or spleen. It can help diagnose conditions like blood clots, circulation problems, or evaluate the effectiveness of treatments for diseases like cancer or heart conditions.
How Is the Sample Collected?
A small amount of your blood is drawn from a vein, usually in your arm. The radioactive tracer is then injected into your body, and the test measures how quickly your red blood cells absorb it over time. The sample may be collected from blood or urine, depending on the specific procedure.
What Does the Test Result Mean?
Results compare how quickly your red blood cells take up the tracer to what is expected in healthy individuals. Abnormal results may indicate poor blood flow, blockages, or other health issues that need further medical evaluation.
Common Conditions Monitored
This test is often used to monitor blood flow in conditions like stroke, liver disease, or after certain surgeries. It can also help assess how well treatments are working for diseases affecting circulation.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Erythrocyte Uptake Rate
Frequently asked questions
Why might my doctor want to order this test?
What happens during the test?
Are there any risks or side effects?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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