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Oxygenated hemoglobin mass fraction in whole blood

Published: August 9, 2026Updated: August 16, 2026

This test measures the proportion of hemoglobin in your blood that is bound to oxygen, which helps assess how well oxygen is being delivered to your body’s tissues.

Quick summary

["Helps evaluate oxygen transport efficiency in your blood."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
34969-6
Short code
OxyHgb MFr BldMV
Synonyms
OxyHgb MFr BldMV
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

What This Test Measures

Oxygenated hemoglobin (oxyHb) is the form of hemoglobin that carries oxygen from your lungs to other parts of your body. This test quantifies the mass fraction of oxyHb in your whole blood sample, which can be useful in diagnosing or monitoring conditions affecting oxygen delivery, such as anemia or respiratory disorders.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like fatigue, shortness of breath, or other signs of poor oxygenation. It may also be used in specialized settings, such as critical care or during certain medical procedures, to monitor oxygen transport dynamically.

Common Uses

This test is less commonly performed than standard hemoglobin tests but may be used in advanced diagnostic or research contexts, particularly when detailed oxygen transport assessment is needed.

How the Test Works

Blood is drawn and analyzed to determine the proportion of hemoglobin molecules carrying oxygen. The method typically involves specialized biochemical techniques to separate and quantify oxyHb without interference from other hemoglobin forms.

Reference range

Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A

Specimen: whole-blood

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 Mass Fraction

Frequently asked questions

What might cause this test to be ordered?
Your doctor may request this test if you have suspected conditions like severe anemia, respiratory failure, or during high-risk medical interventions (e.g., cardiac surgery). It can also help evaluate oxygenation status in patients with chronic diseases affecting circulation or lung function.
How do results differ from standard hemoglobin tests?
Unlike standard hemoglobin tests (e.g., total hemoglobin), this test specifically focuses on the oxygen-bound form. Results can provide additional insight into oxygen delivery efficiency, though they are not routinely used for general screening.
What do abnormal results mean?
Low oxyHb mass fraction may indicate poor oxygenation, while elevated levels could suggest conditions like polycythemia (excess red blood cells). Always discuss results with your healthcare provider, as interpretation depends on your clinical context.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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