Arterial Oxygen Pressure

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Contents 1 Introduction 2 Reference-interval 3 Notes 4 More General Terms 5 Additional Terms 6 References

Introduction

• Partial pressure of oxygen in arterial blood ( PaO2).

Reference-interval

• 83-108 mm Hg
• PaO2 tends to decline with age:
• For age-related decline, estimate using the equation:

*   100 - age/3   (i.e. for age 90, PaO2 = 70 mm Hg)#

• # grossly over simplified, but may have some use

Notes

• a PaO2 of 70 mm Hg is generally satisfactory for air travel* or travel to 8000 feet in elevation.
  

• * Airline cabins are pressurized to an atmosphere equivalent to about 8000 feet in elevation

More General Terms

• Partial pressure of oxygen (pO2)

Additional Terms

• alveolar oxygen pressure (pAO2)

References

1. Diagnostic History & Physical Examination in Medicine, Chan & Winkle, Current Clinical Strategies, Laguna Hills, CA 1996
2. Mader S. In: Intensive Course in Geriatric Medicine & Board Review, Marina Del Ray, CA, Sept 12-15, 2001

arterial oxygen pressure (PaO2)