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Arterial blood gases: a guide to interpretation

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This course provides a practical, structured approach to interpreting arterial blood gases in clinical settings. It covers the underlying physiology of acid-base balance, a stepwise method for analysing ABG results, and the identification of common respiratory and metabolic disorders. Designed to support confident clinical decision-making, the course emphasises real-world application, including recognition of compensation, mixed disorders, and oxygenation abnormalities.

4 Modules1 hour
£169£0
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Arterial blood gases: a guide to interpretation
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Learning Outcomes

What you'll learn

  • Understand the physiological principles underlying acid-base balance
  • Identify the key parameters measured in arterial blood gas analysis
  • Apply a structured, stepwise approach to interpreting ABG results
  • Differentiate between respiratory and metabolic acid-base disorders
  • Interpret anion gap and recognise its clinical significance
  • Assess compensatory mechanisms and identify mixed disorders
  • Recognise common causes of acid-base imbalances in clinical practice
  • Evaluate oxygenation status using ABG parameters including the A–a gradient
  • Apply ABG interpretation to support clinical decision-making

Modules

Module 1

ABG Fundamentals – Measurement, Sampling and Physiology

Module 2

Stepwise Interpretation of ABG Results

Module 3

Common Acid–Base Disorders and Clinical Causes

Module 4

Summary

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Frequently Asked Questions

An ABG test measures blood pH, oxygen, carbon dioxide, and bicarbonate levels to assess acid-base balance, ventilation, and oxygenation in patients.

ABGs are used in respiratory distress, suspected acid-base imbalance, critical illness, or to guide oxygen and ventilation therapy.

The normal blood pH range is 7.35 to 7.45. Values below indicate acidaemia, while values above indicate alkalaemia.

pCO₂ reflects how effectively the lungs are removing carbon dioxide and indicates the respiratory component of acid-base balance.