Oxygenated Hemoglobin in Whole Blood (HbO₂)
This test measures the amount of oxygen bound to hemoglobin in your red blood cells, which helps assess how well oxygen is being transported throughout your body.
["Helps evaluate oxygen delivery efficiency in your blood."]
Key facts at a glance
- LOINC
- 72263-7
- Short code
- OxyHgb CSF-sCnc
- Synonyms
- OxyHgb CSF-sCnc
- Category
- hematology
- Sample
- csf
- Container
- Sterile tube
- 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
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
What Does This Test Measure?
Hemoglobin is the protein in red blood cells that carries oxygen from your lungs to the rest of your body. This test specifically looks at hemoglobin that is fully saturated with oxygen (HbO₂). The result can indicate how effectively your blood is delivering oxygen to tissues, which may be important in conditions affecting circulation or lung function.
Why Might You Need This Test?
Doctors may order this test if you have symptoms like shortness of breath, fatigue, or signs of poor oxygenation (such as blue lips or skin). It can also be part of broader evaluations for conditions like anemia, lung diseases, or heart problems.
How Is This Test Performed?
A small blood sample is drawn from a vein, usually in your arm. The blood is then analyzed in a lab to measure the oxygenated hemoglobin levels. This test is typically done as part of a routine blood draw and does not require special preparation.
What Are Common Uses?
This test is often used alongside other blood tests to diagnose or monitor conditions affecting oxygen transport, such as chronic obstructive pulmonary disease (COPD), severe anemia, or during surgeries requiring precise oxygen management.
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.
Low levels of oxygenated hemoglobin may suggest inadequate oxygen delivery to tissues, which can occur in conditions like severe anemia, respiratory failure, or circulatory issues. High levels might indicate over-saturation of hemoglobin, which can happen in certain medical devices (like oxygen masks) or in rare genetic disorders. Results help guide treatment decisions, such as adjusting oxygen therapy or investigating underlying causes of poor oxygenation.
Short name
Oxygenated Hemoglobin Level
Frequently asked questions
What does a low or high oxygenated hemoglobin level mean?
Does this test require fasting?
How long does it take to get results?
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