Plain-English translation of NCT04630535 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
Researchers are investigating whether obstructive sleep apnea—a common condition where breathing stops and starts during sleep—might naturally protect your heart and organs during major vascular bypass surgery. The study will compare surgical outcomes between patients who have sleep apnea and those who don't, measuring how well the body recovers after the blood supply is temporarily cut off during the operation.
When surgeons clamp the main artery during bypass surgery, tissues lose oxygen temporarily, which can cause injury when blood flow returns. This trial explores whether sleep apnea might trigger natural protective mechanisms in the body that reduce this injury—potentially opening new ways to protect patients during major surgery.
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You'll have a simple overnight sleep study two nights before your scheduled surgery to check for sleep apnea. You'll also complete two brief questionnaires about sleep and daytime sleepiness. During and after your bypass surgery, the team will collect small blood samples at specific time points to measure how your body responds to the surgery. They'll follow up on your recovery for the first month after surgery, tracking any heart or lung complications.
AI-generated summary from trial data · Jun 11, 2026 · Not medical advice
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