Articles and Case Studies

Beyond AHI: What New Research Says About Sleep Apnea and Brain Health By Dr. Chelsie Rohrscheib, Ph.D. — Last reviewed: May 15, 2026 · 5 min read Key Takeaways The apnea–hypopnea index (AHI) — the standard metric for diagnosing sleep apnea —...

Overview Obstructive sleep apnea (OSA) is a highly variable condition. A patient's breathing patterns, oxygen levels, sleep position, and sleep architecture can change substantially from night to night, which may influence the severity observed during a single-night sleep study. This...

Millions of Americans are being tested for sleep apnea at home — but the device doing the testing may be guessing. Most home sleep tests on the market don't actually measure breathing directly; instead, they track secondary signals like heart rate and blood oxygen changes, then use algorithms to infer whether a patient stopped breathing.