• Users Online: 528
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contacts Login 
Year : 2020  |  Volume : 7  |  Issue : 1  |  Page : 51-56

Accuracy of pulse oximetry in comparison with arterial blood gas

Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine, Zagazig University, Zagazig, Egypt

Correspondence Address:
MD Khadeja M Mohamed Elhossieny
Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine, Zagazig University, Elglaa/Zagazig, 4511
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/roaic.roaic_91_18

Rights and Permissions

Background Oxygen plays a principal role in aerobic respiration. Oxygenation is tested by pulse oximetry, which is considered the “fifth vital sign” of health status. It is widely used in critical care medicine to measure arterial oxygen saturation (SaO2). Aim To evaluate the factors affecting the accuracy of pulse oximetry (SpO2) relative arterial oxygen saturation SaO2. Patients and methods The study included 70 patients admitted to emergency and surgical ICU. They were subjected to full history taking, complete physical examination and laboratory investigations, including complete blood count, liver and kidney function tests, taking sample of arterial blood gases, and at the same time, recording the readings of pulse oximetry. Results This study shows that SpO2 is accurate relative to SaO2 in arterial blood gases as the difference between SpO2 and SaO2 was less than ±3%. Many factors affected accuracy, such as mechanical ventilation, vasopressor, oxygen mask (P≥0.047), age (P≥0.045), and corresponding hypoxia (P=0.002), whereas the results were insignificant regarding sex and sepsis (P=0.568 and 0.660, respectively). Conclusion The pulse oximeter remains a valuable tool in intensive care patients, but an awareness of its limitations such as old age more 65 years, mechanical ventilation, vasopressors support, and oxygen mask is important, as they were the impact factors affecting its accuracy. It is an important component of enhancing the quality of intensive care.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded21    
    Comments [Add]    

Recommend this journal