ArticleSleep & breathing = Schlaf & Atmung2026
Changes in the apnea index to hypopnea index ratio after upper airway stimulation therapy.
Article in Sleep & breathing = Schlaf & Atmung, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors.
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Abstract
purposeTo examine the impact of upper airway stimulation therapy on the apnea index/hypopnea index ratio in patients with obstructive sleep apnea.
methodsWe retrospectively analyzed 118 patients who received an upper airway stimulation device between 2015 and 2022.
resultsThe apnea–hypopnea index at baseline was 35.3 ± 8.9 events/hour, which significantly decreased to 14.9 ± 13.1 events/hour at three months and 14.9 ± 9.9 events/hour at twelve months (p < 0.001). The apnea index/hypopnea index ratio shifted from 1:1.3 at baseline to 1:2.3 and 1:2.4 at three and twelve months, respectively, indicating a greater reduction in apneas compared to hypopneas (p < 0.001).
conclusionThese findings suggest that upper airway stimulation therapy causes a shift from apneas to hypopneas, which may indicate that therapy prevents complete upper airway obstructions but may not fully prevent partial obstructions. These findings emphasize to look beyond overall apnea–hypopnea index reduction when evaluating the treatment effect of upper airway stimulation therapy.
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