Retinal oximetry measures systemic hypoxia in central nervous system vessels in chronic obstructive pulmonary disease.
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AuthorsEliasdottir, Thorunn Scheving
Hardarson, Sveinn Hakon
Kristjansdottir, Jona Valgerdur
MetadataShow full item record
CitationRetinal oximetry measures systemic hypoxia in central nervous system vessels in chronic obstructive pulmonary disease. 2017, 12 (3):e0174026 PLoS ONE
AbstractDetermination of the blood oxyhemoglobin saturation in the retinal vessels of the eye can be achieved through spectrophotometric retinal oximetry which provides access to the state of oxyhemoglobin saturation in the central nervous system circulation. The purpose of this study was to test the capability of the Oxymap T1 oximeter to detect systemic hypoxemia and the effect of supplemental oxygen on retinal vessel oxyhemoglobin saturation.
Oxygen saturation of hemoglobin in retinal arterioles and venules was measured in 11 subjects with severe chronic obstructive pulmonary disease (COPD) on long term oxygen therapy. Measurements were made with and without their daily supplemental oxygen. Eleven healthy age and gender matched subjects were measured during ambient air breathing for comparison of oxyhemoglobin saturation in retinal arterioles and venules. Retinal arteriolar oxyhemoglobin saturation in COPD subjects inspiring ambient air was compared with finger pulse oximetry and blood samples from radial artery.
COPD subjects had significantly lower oxyhemoglobin saturation during ambient air breathing than healthy controls in both retinal arterioles (87.2%±4.9% vs. 93.4%±4.3%, p = 0.02; n = 11) and venules (45.0%±10.3% vs. 55.2%±5.5%, p = 0.01). Administration of their prescribed supplemental oxygen increased oxyhemoglobin saturation in retinal arterioles (87.2%±4.9% to 89.5%±6.0%, p = 0.02) but not in venules (45.0%±10.3% to 46.7%±12.8%, p = 0.3). Retinal oximetry values were slightly lower than radial artery blood values (mean percentage points difference = -5.0±5.4, 95% CI: -15.68 to 5.67) and finger pulse oximetry values (-3.1±5.5, 95% CI: -14.05 to 7.84).
The noninvasive Oxymap T1 retinal oximetry detects hypoxemia in central nervous system vessels in patients with severe COPD compared with healthy controls. The instrument is sensitive to changes in oxygen breathing but displays slightly lower measures than finger pulse oximetry or radial artery measures. With further technological improvement, retinal oximetry may offer noninvasive "on-line" measurement of oxygen levels in central circulation in general anesthesia and critically ill patients.
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- Retinal oximetry and systemic arterial oxygen levels.
- Authors: Eliasdottir TS
- Issue date: 2018 Nov
- Retinal oximetry.
- Authors: Hardarson SH
- Issue date: 2013 Mar
- Method comparison of two non-invasive dual-wavelength spectrophotometric retinal oximeters in healthy young subjects during normoxia.
- Authors: Told R, Boltz A, Schmetterer L, Garhöfer G, Sacu S, Schmidt-Erfurth U, Pollreisz A
- Issue date: 2018 Aug
- Choroidal oximetry with a noninvasive spectrophotometric oximeter.
- Authors: Kristjansdottir JV, Hardarson SH, Harvey AR, Olafsdottir OB, Eliasdottir TS, Stefánsson E
- Issue date: 2013 May 7
- Retinal Vessel Oxygen Saturation during 100% Oxygen Breathing in Healthy Individuals.
- Authors: Olafsdottir OB, Eliasdottir TS, Kristjansdottir JV, Hardarson SH, Stefánsson E
- Issue date: 2015