Erythrocyte Traits: Simplified Measurement Profile (Serum/Plasma)
This test provides a general overview of red blood cell characteristics in your blood, often measured in serum or plasma. It helps assess blood health and identify potential issues with red blood cell function or production.
["This test helps doctors understand how well your red blood cells function and whether there may be underlying blood disorders."]
Key facts at a glance
- LOINC
- 16112-5
- Short code
- ER Tiss-Imp
- Synonyms
- ER Tiss-Imp
- Category
- coagulation
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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
This test evaluates several key traits of red blood cells, though specific measurements may vary. Common traits include size (red blood cell distribution width, RDW), shape, and concentration of red blood cells. These traits can give clues about conditions like anemia, blood loss, or bone marrow disorders.
Why It Matters in Blood Health
Red blood cells carry oxygen throughout your body. Changes in their size, shape, or number can signal problems like anemia (low red blood cells), iron deficiency, or other blood-related conditions. This test helps doctors diagnose and monitor these issues early.
Common Uses and When It Might Be Ordered
Doctors may order this test if you have symptoms like fatigue, pale skin, shortness of breath, or if they suspect a blood disorder. It’s also used during routine check-ups, pregnancy, or before surgeries to ensure your blood is healthy.
What to Expect Before the Test
No special preparation is needed for this test. You may have a small needle inserted into your arm to draw blood, similar to other blood tests. If you’re on blood-thinning medication, let your doctor know before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
How does this test relate to my overall health?
What does a high or low result mean?
Can this test be done at home?
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