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Related Experiment Videos

Normal oxyhemoglobin saturation during sleep. How low does it go?

R E Gries1, L J Brooks

  • 1Division of Pediatric Pulmonology, Rainbow Babies and Childrens Hospital, Case Western Reserve University, Cleveland, USA.

Chest
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Healthy individuals show specific oxyhemoglobin saturation (O2 Sat) ranges. Older adults have lower O2 Sat compared to younger individuals, even without known cardiorespiratory conditions.

Area of Science:

  • Pulmonary Medicine
  • Sleep Medicine
  • Clinical Physiology

Background:

  • Establishing normative values for oxyhemoglobin saturation (O2 Sat) in healthy individuals is crucial for clinical interpretation.
  • Previous studies may lack comprehensive data across diverse age groups or exclude specific populations.
  • Understanding variations in O2 Sat is important for diagnosing and managing respiratory and sleep disorders.

Purpose of the Study:

  • To define reference ranges for overnight oxyhemoglobin saturation (O2 Sat) in a large cohort of healthy individuals.
  • To investigate the influence of age and sex on O2 Sat parameters in healthy adults.
  • To compare O2 Sat values between healthy subjects and patients with obstructive sleep apnea (OSA) and asthma.

Main Methods:

  • Retrospective analysis of overnight pulse oximetry data from 350 healthy individuals.

Related Experiment Videos

  • Exclusion of data with motion artifacts; calculation of lowest saturation (Low Sat), median saturation (Sat 50), and 10th percentile saturation (Sat 10).
  • Comparison of O2 Sat metrics between healthy subjects and 25 patients with OSA and 21 patients with asthma.

    • Main Results:

    • In healthy individuals, mean Low Sat was 90.4% ± 3.1%, mean Sat 10 was 94.7% ± 1.6%, and mean Sat 50 was 96.5% ± 1.5%.
    • No significant correlation was found between O2 Sat measures and sex, race, or BMI in healthy subjects.
    • Older subjects (>60 years) exhibited lower Sat 10 and Sat 50 compared to younger subjects; OSA patients showed significantly lower O2 Sat values than healthy controls.

    Conclusions:

    • This study provides detailed oxyhemoglobin saturation data for a large, healthy population.
    • Age is a significant factor influencing O2 Sat in healthy individuals, with older adults demonstrating lower values.
    • Patients with OSA exhibit demonstrably lower O2 Sat compared to healthy individuals, highlighting the utility of pulse oximetry in OSA assessment.