Oxygenated Hemoglobin in Whole Blood (Preparation: Pre-Treatment)
This test measures the amount of oxygen-bound hemoglobin in your blood before any medical treatment or intervention. It helps assess how well your blood is delivering oxygen to your body’s tissues.
["Understanding your blood’s oxygen-carrying capacity before treatment can inform decisions about your care."]
Key facts at a glance
- LOINC
- 19969-5
- Short code
- OxyHgb pre PT % BldA
- Synonyms
- OxyHgb pre PT % 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
Doctors may order this test if you’re experiencing symptoms like fatigue, shortness of breath, or other signs of poor oxygenation. It can also be part of a broader evaluation for conditions like anemia, lung disease, or circulation problems.
What to Expect Before the Test
No special preparation is needed for this test. You’ll have a small needle inserted into your arm or hand to draw a blood sample. The process is quick and usually painless. If you’re on oxygen therapy or have a history of clotting issues, your provider may give specific instructions.
What the Results Mean
Hemoglobin’s oxygen-binding capacity reflects how well your blood is transporting oxygen. While exact reference ranges vary by lab, abnormal results may signal issues like low oxygen levels, blood disorders, or other health concerns that need further evaluation.
Common Conditions Linked to This Test
Results might be checked if you have or are at risk for conditions such as chronic obstructive pulmonary disease (COPD), heart failure, or severe anemia. It can also help monitor oxygen levels in patients on ventilators or other respiratory support.
Reference range
Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/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.
This test provides critical information about your body’s ability to deliver oxygen. Abnormal levels may indicate underlying problems that require medical attention, such as inefficient oxygen use, blood flow issues, or organ dysfunction. It’s often used alongside other tests to create a full picture of your health status.
Short name
HbO₂ Pre-Treatment
Frequently asked questions
What does an abnormal result mean?
Does this test require fasting?
How long will I need to wait for 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