Clinical trial Recruiting at 1 site Observational Ages 18 and up

Exploring the effects of obstructive sleep apnea on vascular surgery outcomes

Official title: Obstructive Sleep Apnea as a Remote Ischemic Preconditioning in Patients Scheduled for Aorto-bifemoral Bypass Surgery

Run by St. Anne's University Hospital Brno, Czech Republic · NCT04630535 · Data updated 2026-11-12

This study is testing how obstructive sleep apnea might affect recovery and complications in patients having surgery to repair an abdominal aortic aneurysm.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment100 (estimated)
SponsorSt. Anne's University Hospital Brno, Czech Republic
Academic / other
Locations1 site (Brno, Czech Republic)
StatusRecruiting
StartedNovember 1, 2020
Main results expectedDecember 31, 2028
Study endsJanuary 31, 2029
Registry record updatedApril 27, 2026
Trial IDNCT04630535 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are patients scheduled for elective aortobifemoral bypass surgery who may or may not have obstructive sleep apnea.

Probably not a fit

Patients requiring emergent surgery, those undergoing re-operations, or those with known OSA on CPAP treatment may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to investigate the relationship between obstructive sleep apnea (OSA) and ischemia-reperfusion (I/R) injury in patients undergoing elective aortobifemoral bypass surgery for abdominal aortic aneurysm repair. Patients will be assessed for OSA severity using polygraphy and questionnaires prior to surgery. The study will monitor postoperative complications and specific markers of I/R at various time points following surgery to determine if OSA has a protective effect against I/R injury. The findings could provide insights into optimizing surgical outcomes for patients with OSA.

Why it matters

Potential benefit: If successful, this study could lead to improved postoperative outcomes for patients with obstructive sleep apnea undergoing vascular surgery.

How similar studies have gone: While studies on ischemic preconditioning have shown mixed results, the specific focus on OSA's protective effects in this context is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* patients scheduled for elective aorto-bifemoral bypass (AAA and Leriche syndrome patients)

Exclusion Criteria:

* emergent surgery
* aorto-bifemoral bypass using deep vein graft
* re-operations
* known OSA with CPAP treatment

Where it's running

  • St. Anne's University Hospital Brno
    Brno, Czech Republic, Czechia
    Recruiting

Study contacts

  • Principal investigator: Ivan Cundrle, M.D., Ph.D. — St. Anne's University Hospital in Brno
  • Study coordinator: Ivan Cundrle, M.D., Ph.D.
  • Email: ivan.cundrle@fnusa.cz
  • Phone: 00420543182553

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.