AzTrials
AzTrials

Obstructive Sleep ApneaNCT04630535

OSA as a Remote Ischemic Preconditioning in Vascular Surgery

An observational study of Obstructive Sleep Apnea and Vascular Aneurysm, run by St. Anne's University Hospital Brno, Czech Republic at 1 site in Czechia.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

Ischemia and reperfusion (I/R) injury during abdominal aortic aneurysm (AAA) repair is inevitable and may lead to postoperative multi-organ failure. Remote ischemic preconditioning (short periods of ischemia in anticipation of longer period of ischemia) may act protectively against ischemia. Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
aorto-bifemoral bypass surgery
Type of treatment
Surgery or procedure
How many people
100 participants
Where
1 siteCzechia
Study dates
1 Nov 2020to 31 Jan 2029
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: consecutive patients scheduled for elective aorto-bifemoral bypass (AAA and Leriche syndrome patients)

Who may be able to join

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

Who cannot join

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

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Ivan Cundrle, M.D., Ph.D. contact

00420543182553

ivan.cundrle@fnusa.cz

Marek Lukes, M.D. contact

00420543182553

marek.lukes@fnusa.cz

Czechia1 site, 1 recruiting
  • St. Anne's University Hospital Brno

    Brno, Czech Republic, 65691

    Ivan Cundrle, M.D., Ph.D., 00420543182553, ivan.cundrle@fnusa.cz

    Marek Lukes, M.D., 00420543182553, marek.lukes@fnusa.cz

    Recruiting

Other trials in Czechia

About this study

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

Ischemia and reperfusion (I/R) injury during abdominal aortic aneurysm (AAA) repair is inevitable and may lead to postoperative multi-organ failure. Remote ischemic preconditioning (short periods of ischemia in anticipation of longer period of ischemia) may act protectively against ischemia.

Studies of ischemic preconditioning in patients with AAA are conflicting. Obstructive sleep apnea (OSA) is a sleep disordered breathing syndrome which may have a protective effect against ischemia.

The investigators hypothesize that I/R injury will be less pronounced in patients who have OSA and that the extent of I/R injury will inversely correlate with OSA severity. Accordingly, the aim of this study is to compare postoperative complications and markers of I/R in patients undergoing elective AAA repair who do and do not have OSA.

Read the detailed description

Patients. Consecutive patients scheduled for elective aortobifemoral bypass (AAA and Leriche syndrome patients) will be recruited for this prospective, observational study.

Polygraphy (PG). PG measurements will be done two nights before surgery using the Embletta system (Embla - Embletta MPR PG Sleep Data Recording System).

STOP-BANG, Epworth questionnaire. Both questionnaires will be done the same day as polygraphy

Cardiovascular complications will be assessed from the first 30 post-operative days Pulmonary complications will be assessed from the first 30 post-operative days

Specific markers of I/R. T0 - before anesthesia induction T1 - 3 hrs after aorta de-clamping T2 - 12 hrs after aorta de-clamping T3 - 24 hrs after aorta de-clamping T4 - on the fifth post-operative day

Being tested
aorto-bifemoral bypass surgery
Keywords
remote preconditioning
Medical subject headings
Sleep Apnea, Obstructive, Reperfusion Injury

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • aorto-bifemoral bypass surgeryProcedure or surgery

    aorto-bifemoral bypass surgery (Leriche syndrom, elective AAA repair)

Study groups in NCT04630535
Study groupRoleWhat they receive
Obstructive Sleep ApneaPacient with OSA (AHI≥5) undergoing aorto-bifemoral bypass
Receives: Procedure: aorto-bifemoral bypass surgery
Without Obstructive Sleep ApneaPatinets without OSA undergoing aorto-bifemoral bypass
Receives: Procedure: aorto-bifemoral bypass surgery

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change of I/R injury markers

    Plasma Total Antioxidant Capacity and Reactive Oxygen Species Concentration

    Measured: T0 - before anesthesia induction; T1 - 3 hrs after aorta de-clamping; T2 - 12 hrs after aorta de-clamping; T3 - 24 hrs after aorta de-clamping; T4 - on the fifth post-operative day

Secondary outcomes (1)
  1. post-operative complications

    cardiovascular and pulmonary post-operative complications

    Measured: up to 30 post-operative days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted16 Nov 2020
  2. Study start1 Nov 2020
  3. Primary completion31 Dec 2028 (estimated)
  4. Study completion31 Jan 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
100 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04630535
Sponsor's protocol ID
IIT/2019/25
Status last verified
Apr 2026
First submitted
4 Nov 2020
Last updated
27 Apr 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Katseni K, Chalkias A, Kotsis T, Dafnios N, Arapoglou V, Kaparos G, Logothetis E, Iacovidou N, Karvouni E, Katsenis K. The Effect of Perioperative Ischemia and Reperfusion on Multiorgan Dysfunction following Abdominal Aortic Aneurysm Repair. Biomed Res Int. 2015;2015:598980. doi: 10.1155/2015/598980. Epub 2015 Dec 21.

    PubMed 26798637
  • Murry CE, Jennings RB, Reimer KA. Preconditioning with ischemia: a delay of lethal cell injury in ischemic myocardium. Circulation. 1986 Nov;74(5):1124-36. doi: 10.1161/01.cir.74.5.1124.

    PubMed 3769170
  • Walsh SR, Boyle JR, Tang TY, Sadat U, Cooper DG, Lapsley M, Norden AG, Varty K, Hayes PD, Gaunt ME. Remote ischemic preconditioning for renal and cardiac protection during endovascular aneurysm repair: a randomized controlled trial. J Endovasc Ther. 2009 Dec;16(6):680-9. doi: 10.1583/09-2817.1.

    PubMed 19995115
  • Walsh SR, Sadat U, Boyle JR, Tang TY, Lapsley M, Norden AG, Gaunt ME. Remote ischemic preconditioning for renal protection during elective open infrarenal abdominal aortic aneurysm repair: randomized controlled trial. Vasc Endovascular Surg. 2010 Jul;44(5):334-40. doi: 10.1177/1538574410370788. Epub 2010 May 18.

    PubMed 20484066
  • Li C, Li YS, Xu M, Wen SH, Yao X, Wu Y, Huang CY, Huang WQ, Liu KX. Limb remote ischemic preconditioning for intestinal and pulmonary protection during elective open infrarenal abdominal aortic aneurysm repair: a randomized controlled trial. Anesthesiology. 2013 Apr;118(4):842-52. doi: 10.1097/ALN.0b013e3182850da5.

    PubMed 23353795
  • Murphy N, Vijayan A, Frohlich S, O'Farrell F, Barry M, Sheehan S, Boylan J, Conlon N. Remote ischemic preconditioning does not affect the incidence of acute kidney injury after elective abdominal aortic aneurysm repair. J Cardiothorac Vasc Anesth. 2014 Oct;28(5):1285-92. doi: 10.1053/j.jvca.2014.04.018.

    PubMed 25281045
  • Healy DA, Boyle E, McCartan D, Bourke M, Medani M, Ferguson J, Yagoub H, Bashar K, O'Donnell M, Newell J, Canning C, McMonagle M, Dowdall J, Cross S, O'Daly S, Manning B, Fulton G, Kavanagh EG, Burke P, Grace PA, Moloney MC, Walsh SR; Preconditioning Shields Against Vascular Events in Surgery (Preconditioning SAVES) Trial Group. A MultiCenter Pilot Randomized Controlled Trial of Remote Ischemic Preconditioning in Major Vascular Surgery. Vasc Endovascular Surg. 2015 Nov;49(8):220-7. doi: 10.1177/1538574415614404. Epub 2015 Nov 16.

    PubMed 26574485
  • Garcia S, Rector TS, Zakharova M, Herrmann RR, Adabag S, Bertog S, Sandoval Y, Santilli S, Brilakis ES, McFalls EO. Cardiac Remote Ischemic Preconditioning Prior to Elective Vascular Surgery (CRIPES): A Prospective, Randomized, Sham-Controlled Phase II Clinical Trial. J Am Heart Assoc. 2016 Sep 29;5(10):e003916. doi: 10.1161/JAHA.116.003916.

    PubMed 27688236
  • Thomas KN, Cotter JD, Williams MJ, van Rij AM. Repeated Episodes of Remote Ischemic Preconditioning for the Prevention of Myocardial Injury in Vascular Surgery. Vasc Endovascular Surg. 2016 Apr;50(3):140-6. doi: 10.1177/1538574416639150. Epub 2016 Apr 12.

    PubMed 27075990
  • Mouton R, Pollock J, Soar J, Mitchell DC, Rogers CA. Remote ischaemic preconditioning versus sham procedure for abdominal aortic aneurysm repair: an external feasibility randomized controlled trial. Trials. 2015 Aug 25;16:377. doi: 10.1186/s13063-015-0899-3.

    PubMed 26303818
  • De Freitas S, Hicks CW, Mouton R, Garcia S, Healy D, Connolly C, Thomas KN, Walsh SR. Effects of Ischemic Preconditioning on Abdominal Aortic Aneurysm Repair: A Systematic Review and Meta-analysis. J Surg Res. 2019 Mar;235:340-349. doi: 10.1016/j.jss.2018.09.049. Epub 2018 Nov 13.

    PubMed 30691816
  • Sanchez-de-la-Torre A, Soler X, Barbe F, Flores M, Maisel A, Malhotra A, Rue M, Bertran S, Aldoma A, Worner F, Valls J, Lee CH, Turino C, Galera E, de Batlle J, Sanchez-de-la-Torre M; Spanish Sleep Network( *). Cardiac Troponin Values in Patients With Acute Coronary Syndrome and Sleep Apnea: A Pilot Study. Chest. 2018 Feb;153(2):329-338. doi: 10.1016/j.chest.2017.06.046. Epub 2017 Jul 20.

    PubMed 28736306
  • Shah N, Redline S, Yaggi HK, Wu R, Zhao CG, Ostfeld R, Menegus M, Tracy D, Brush E, Appel WD, Kaplan RC. Obstructive sleep apnea and acute myocardial infarction severity: ischemic preconditioning? Sleep Breath. 2013 May;17(2):819-26. doi: 10.1007/s11325-012-0770-7. Epub 2012 Oct 23.

    PubMed 23090861

Questions about this trial

What is this clinical trial studying?

An observational study of Obstructive Sleep Apnea and Vascular Aneurysm, run by St. Anne's University Hospital Brno, Czech Republic at 1 site in Czechia.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 27 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Czechia. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Ivan Cundrle, M.D., Ph.D. (00420543182553, ivan.cundrle@fnusa.cz), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change of I/R injury markers (time frame: T0 - before anesthesia induction; T1 - 3 hrs after aorta de-clamping; T2 - 12 hrs after aorta de-clamping; T3 - 24 hrs after aorta de-clamping; T4 - on the fifth post-operative day). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04630535, which also lists 13 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Apr 2026.

Free account

Keep searching with a free account

You’ve used your 3 free searches for this session. Log in or create a free AzTrials account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in
Clinical Trial NCT04630535 | AzTrials