Obstructive Sleep Apnea in Patients with Branch Retinal Vein Occlusion: A Preliminary Study
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Purpose: Our study aimed to determine whether obstructive sleep apnea (OSA) is common among branch retinalvein occlusion (BRVO) patients without systemic risk factors using a Watch PAT-100 portable monitoring device. Methods: The study participants included consecutive patients with BRVO of less than 3 months duration withoutany risk factors known to be associated with OSA (diabetes, coronary artery disease, stroke, hematologicdiseases, autoimmune disease, etc.) except for hypertension. All patients underwent full-night unattendedpolysomnography by means of a portable monitor Watch PAT-100 device. The apnea-hypopnea index (AHI)was calculated as the average number of apnea and hypopnea events per hour of sleep, and an AHI score offive or more events was diagnosed as OSA. Results: Among 19 patients (6 males and 13 females), 42.1% (8 of 19) had an AHI reflective of OSA. In the 13patients who had no concurrent illness, including hypertension, 30.8% (4 of 13) had positive test results forOSA; three of these patients were ranked as mild OSA, while one had moderate OSA. The OSA group had anaverage AHI of 12.3 ± 7.8, and the average AHI was 2.0 ± 0.9 in the non-OSA group. Although it was not statisticallyproven, we found that OSA patients experienced a more severe form of BRVO. Conclusions: We found a higher than expected rate of OSA in BRVO patients lacking concomitant diseasestypically associated with OSA. Our findings suggest that OSA could be an additional risk factor in the pathogenesisof BRVO or at least a frequently associated condition that could function as a triggering factor.
Abstract
Purpose: Our study aimed to determine whether obstructive sleep apnea (OSA) is common among branch retinalvein occlusion (BRVO) patients without systemic risk factors using a Watch PAT-100 portable monitoring device. Methods: The study participants included consecutive patients with BRVO of less than 3 months duration withoutany risk factors known to be associated with OSA (diabetes, coronary artery disease, stroke, hematologicdiseases, autoimmune disease, etc.) except for hypertension. All patients underwent full-night unattendedpolysomnography by means of a portable monitor Watch PAT-100 device. The apnea-hypopnea index (AHI)was calculated as the average number of apnea and hypopnea events per hour of sleep, and an AHI score offive or more events was diagnosed as OSA. Results: Among 19 patients (6 males and 13 females), 42.1% (8 of 19) had an AHI reflective of OSA. In the 13patients who had no concurrent illness, including hypertension, 30.8% (4 of 13) had positive test results forOSA; three of these patients were ranked as mild OSA, while one had moderate OSA. The OSA group had anaverage AHI of 12.3 ± 7.8, and the average AHI was 2.0 ± 0.9 in the non-OSA group. Although it was not statisticallyproven, we found that OSA patients experienced a more severe form of BRVO. Conclusions: We found a higher than expected rate of OSA in BRVO patients lacking concomitant diseasestypically associated with OSA. Our findings suggest that OSA could be an additional risk factor in the pathogenesisof BRVO or at least a frequently associated condition that could function as a triggering factor.
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