Oxygenated Hemoglobin During Blood Loss Assessment (Serum/Plasma Concentration)
This test measures the amount of oxygen carried by hemoglobin in your blood during a period of blood loss, typically tracked over 24 hours. It helps assess how well your body is maintaining oxygen delivery to tissues.
["This test helps doctors monitor how your body responds to blood loss by tracking oxygen-carrying capacity over time."]
Key facts at a glance
- LOINC
- 19959-6
- Short code
- OxyHgb during Tx % BldA
- Synonyms
- OxyHgb during Tx % 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’re experiencing or at risk for significant blood loss, such as after surgery, trauma, or heavy menstrual bleeding. It’s also used in patients with conditions like anemia or those receiving blood transfusions to ensure proper oxygenation levels.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample (serum or plasma) during a routine lab visit. If you’re on blood thinners, let your provider know before the test.
How the Test Works
Blood is drawn and analyzed to measure the concentration of oxygen-bound hemoglobin. This is often done using a specialized immunoassay or similar method to detect changes over time.
What the Results Mean
Results may indicate whether your body is efficiently delivering oxygen despite blood loss. Low levels could suggest inadequate compensation, while stable or rising levels may reflect effective adaptation.
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.
Clinical Significance
Short name
OxyHb Monitoring
Frequently asked questions
What does a low oxygenated hemoglobin level during blood loss mean?
How often should this test be repeated?
Can diet 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