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Chapter 7 - Blood Gas Analysis

Published online by Cambridge University Press:  30 August 2019

By
David Connor
Edited by
Hozefa Ebrahim  and
David Ashton-Cleary
Hozefa Ebrahim
Affiliation:
University Hospitals Birmingham Foundation NHS Trust
David Ashton-Cleary
Affiliation:
Royal Cornwall Hospitals NHS Trust
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Summary

A 32-year-old female is admitted to the emergency department following rescue from a house fire. She is unconscious and her face is covered in soot. There is no evidence of traumatic injury and her blood pressure is normal. Her oxygen saturation on pulse oximetry (SpO2) reads 98% and she is receiving supplementary oxygen via a non-rebreathe oxygen mask. On blood gas analysis, she has a pH of 7.1 with a lactate of 10 mmol l–1, her PO2 is 70 kPa and her PCO2 is 3.5 kPa. Her arterial oxygen saturation (SaO2) is 100%, whilst her fractional oxyhaemoglobin content (FO2Hb) is 90%.

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Chapter
Information
Maths, Physics and Clinical Measurement for Anaesthesia and Intensive Care , pp. 97 - 112
Publisher: Cambridge University Press
Print publication year: 2019

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