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Radiometer - specialists by blood

Radiometer - pioneers in blood gas testing since 1954

  • Connected solutions, specialist knowledge, trusted partnership
  • Continuous innovation and improvement
  • Market leader in blood gas testing

A proud beginning in blood gas analysis

The history of Radiometer as we know it today began in 1954 when Radiometer developed the world’s first commercially available blood gas analyzer. [1, 2]

But did you know that the story of Radiometer dates back even further? Founded in 1935, Radiometer originally set out to focus on electronic measuring instruments for the growing radio industry.

However, when the polio epidemic swept across Europe in the early 1950s, Professor Poul Astrup and anesthesiologist Bjarne Ibsen discovered that Radiometer pH meters could be used to measure the pH value in blood. [1, 2, 3]

What is blood gas? Blood dropWhat is blood gas? Blood drop
Close up of hand inserting a sample into the ABL9 blood gas analyzerClose up of hand inserting a sample into the ABL9 blood gas analyzer

Continued focus on acute care diagnostics

Since then, we have refined our blood gas testing knowledge and experience, and continue to advance our acute care diagnostic solutions.

For example, our blood gas analyzers can deliver blood gas results from 19 parameters including creatinine and urea in just 35 seconds.

In addition, the Radiometer immunoassay analyzer AQT 90 FLEX can test for nine different biomarkers to support health care professionals in making timely diagnoses of conditions such as myocardial infarction, heart failure, respiratory failure, pulmonary embolism and sepsis with results in 11-21 minutes.

Today, as the global market leader within blood gas testing, we continue to help health care professionals make sure life comes first through connected solutions, expert knowledge and trusted partnership.

What is blood gas testing?

When a critically ill patient is suffering from a respiratory or metabolic disorder, arterial blood gas analysis is central to evaluate the patient’s status, make the appropriate diagnostic decisions and monitor the effects of potential treatment.

In blood gas analysis, you measure the amount of oxygen (O2), carbon dioxide (CO2) and the acidity of pH in the blood as well as concentrations of other parameters, like electrolytes, metabolites and co-oximetry.

Critically ill patients are often unstable and their blood gas values can change rapidly, requiring fast intervention by caregivers.

Hospital situation - patient and doctor/nurse and the TCM5 BASIC monitor in the backgroundHospital situation - patient and doctor/nurse and the TCM5 BASIC monitor in the background
Hospital situation - two people investigating the paper result from a Radiometer blood gas anlyzerHospital situation - two people investigating the paper result from a Radiometer blood gas anlyzer

Why fast and reliable results are essential in blood gas analysis

A blood gas result reflects the status of the patient. Repeated blood sampling is often necessary to obtain a new blood gas test result here and now.

In order to make timely and well-founded diagnosis and treatment decisions, blood gas test results must be available within a very short time.

That is why clinicians often perform blood gas testing directly at the point of care in order to avoid waiting for test results from the central lab.

Radiometer blood gas analyzers deliver fast and reliable results in a matter of seconds on very small blood sample volumes of only 65 µL.

Guiding your blood gas testing

Blood gas analysis requires close attention to best practices throughout the entire blood gas analysis process, including the preanalytical, analytical and postanalytical phases.

The quality of the blood gas sample is central for the quality of the result.

We have gathered a set of educational videos and training material for you on the collection of arterial blood gas samples, understanding the acid-base balance and how to interpret the patient results.

Related knowledge sources

Radiometer and present free educational webinars on topics surrounding acute care testing

Webinars on blood gas testing

Evolution of blood gas testing - Part 1
April 2, 2014
Presented by Ellis Jacobs, PhD, Assoc. Professor of Pathology,
NYU School of Medicine

Minimizing pre-analytical errors in blood gas testing
March 26, 2015
Presented by Ana-Maria Simundic, PhD, Prof. of Medical Biochemistry,
Zagreb University, Zagreb, Croatia

Download Acute Care testing handbook from Radiometer

The acute care testing handbook

Download the free guide on blood gases and other critical parameters in acute care testing.


1. Andersen H.L. Livsværk - Radiometer 1935-2004. Historika 2020
2. Senelar LR. The Danish anaesthesiologist Björn Ibsen a pioneer of long-term ventilation on the upper airways. Senckenberg Institute of History and Ethics of Medicine 2009. 1-49.
3. Severinghaus J et al. Blood Gas Analysis and Critical Care Medicine. Am J Respir Crit Care Med 1998; 157: S114-S122.


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Effective Date January 20th, 2023 (last updated January 20th, 2023)


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