blood gas: meaning, definition, pronunciation and examples
Technical/MedicalFormal, Clinical
Quick answer
What does “blood gas” mean?
A medical test that measures the levels of oxygen, carbon dioxide, and acidity (pH) in the blood.
Audio
Pronunciation
Definition
Meaning and Definition
A medical test that measures the levels of oxygen, carbon dioxide, and acidity (pH) in the blood.
1. The sample of blood taken for this analysis. 2. (Informally) The results of the test itself. 3. In critical care, continuous or frequent monitoring of these parameters to guide treatment.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. The clinical procedure and terminology are identical. Minor potential differences in shorthand: a UK clinician might say 'check the gases' where a US one might say 'check the ABG'.
Connotations
Carries the same high-stakes, clinical connotation in both varieties. Associated with emergency departments, intensive care units, and respiratory medicine.
Frequency
Equally frequent in professional medical discourse in both regions. Extremely low frequency in general public discourse.
Grammar
How to Use “blood gas” in a Sentence
to run a blood gas (on a patient)to have a blood gas donethe blood gas showed (hypoxia)Vocabulary
Collocations
Examples
Examples of “blood gas” in a Sentence
adjective
British English
- The blood-gas analyser needs calibration.
- Blood-gas parameters were stable overnight.
American English
- The blood gas analyzer needs calibration.
- Blood gas parameters were stable overnight.
Usage
Meaning in Context
Academic
Used in medical textbooks, research papers, and physiology courses to discuss respiratory function, acid-base balance, and critical care management.
Everyday
Virtually unused. A patient might refer to it as 'that test where they take blood from my wrist'.
Technical
The core context. Used in patient notes, clinical discussions, lab reports, and medical device manuals (e.g., blood gas analysers).
Vocabulary
Synonyms of “blood gas”
Neutral
Weak
Watch out
Common Mistakes When Using “blood gas”
- Using 'blood gas' as a verb (e.g., 'We need to blood gas him' is non-standard; use 'We need to run/get a blood gas on him.').
- Assuming it refers to a gaseous form of blood rather than a measurement of gases *in* the blood.
FAQ
Frequently Asked Questions
It can be, especially an arterial blood gas (ABG), which is often taken from the radial artery in the wrist, a sensitive area. It is typically more uncomfortable than a standard venous blood draw.
An Arterial Blood Gas (ABG) is taken from an artery and is the gold standard for assessing oxygenation and acid-base status. A Venous Blood Gas (VBG) is taken from a vein and is useful for evaluating metabolic status (like pH and CO2) but not oxygenation.
Yes, 'blood gases' is commonly used to refer to multiple test results or parameters (e.g., 'The blood gases have improved').
No, it is highly specialised medical jargon. The general public would likely say 'a blood test' or be more specific, like 'a test to check the oxygen in my blood'.
A medical test that measures the levels of oxygen, carbon dioxide, and acidity (pH) in the blood.
Blood gas is usually formal, clinical in register.
Blood gas: in British English it is pronounced /ˈblʌd ˌɡæs/, and in American English it is pronounced /ˈblʌd ˌɡæs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a car's exhaust gas analysis, but for your blood. It checks the 'exhaust' (CO2) and 'fuel' (O2) levels in your bloodstream.
Conceptual Metaphor
BLOOD IS A TRANSPORT SYSTEM; THE BLOOD GAS IS A SNAPSHOT REPORT OF ITS CARGO (GASES) AND THE CONDITION OF THE CONTAINER (ACIDITY).
Practice
Quiz
What is the primary purpose of a blood gas test?