Oxygenated hemoglobin concentration in blood during a 24-hour period
This test measures how much oxygen your blood carries over a full day, helping doctors assess how well your body is delivering oxygen to tissues.
["Helps evaluate oxygen transport efficiency in your bloodstream over time."]
Key facts at a glance
- LOINC
- 19957-0
- Short code
- OxyHgb during BD % BldA
- Synonyms
- OxyHgb during BD % BldA
- Category
- hematology
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 12
- Ref high
- 17.5
- Critical range
- 7 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 85018
- SNOMED
- 900000000000003004
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your healthcare provider may order this test if you have symptoms like fatigue, shortness of breath, or signs of poor oxygen circulation. It can also be used to monitor conditions affecting oxygen transport, such as anemia or lung diseases.
What to Expect Before the Test
No special preparation is needed. You may have a small needle inserted into a vein (usually in your arm) to draw blood samples throughout the day. The test involves collecting blood samples at specific intervals to track oxygen levels continuously.
How the Test Works
Blood samples are taken at regular intervals (often every few hours) to measure the amount of oxygen bound to hemoglobin. Advanced lab techniques analyze these samples to create a profile of your oxygenated hemoglobin levels over 24 hours.
Possible Results and Interpretation
Results are used to compare how well your blood delivers oxygen to tissues. Abnormal patterns may indicate issues like inefficient oxygen use, blood flow problems, or underlying health conditions affecting red blood cells.
Reference range
Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
24-Hour Oxygenated Hemoglobin Profile
Frequently asked questions
What does a normal result mean?
How often should I get this test?
Can lifestyle changes affect this test?
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