- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05354648
Effects of Hypoxic-hyperoxic Preconditioning in Cardio-surgical Patients
Effects of Hypoxic-hyperoxic Preconditioning on Myocardial Protection Against Ischemia-reperfusion Injury in Cardio-surgical Patients
Study Overview
Status
Intervention / Treatment
Detailed Description
It has been firmly established that the diminished oxygen delivery to the tissues in response to hypoxia is countered by a combination of the increased regional blood flow and the enhanced functional capillary density in the microcirculation. In experimental studies, exposure to hyperoxia for a limited time before ischemia induces a low-grade systemic oxidative stress evokes a preconditioning-like effect on the myocardium and reduces the infarction area by 20%, and the number of arrhythmias after ischemia-reperfusion. One hundred twenty patients were randomly assigned into two equal groups: hypoxic-hyperoxic preconditioning before the surgery (HHP group) and the control group (without preconditioning). Safety control of the preconditioning procedure included ECG monitoring, invasive blood pressure, cardiac output, pulse oximetry, capnography, cerebral oximetry, measurement of anaerobic threshold; acid-base status and metabolic state of arterial and venous blood were assessed once every 10 min during the preconditioning procedure; oxygen balance parameters were calculated. Seventy-two hours before the surgery, an anaerobic threshold was determined to establish a safe oxygen concentration in the respiratory gas mixture during the hypoxic preconditioning phase from 10 to 14%, followed by 75-80% oxygen concentration during the hyperoxic phase.
The hypoxic-hyperoxic preconditioning with individual parameters selection based on the anaerobic threshold in patients with coronary artery diseases before the main stage of cardiac surgery with a cardiopulmonary bypass should reduce the duration of mechanical ventilation, catecholamine support, and frequency of perioperative complications.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- the need for coronary artery bypass grafting (CABG)
Exclusion Criteria:
- age over 75 years
- emergency surgery
- diabetes mellitus
- exacerbation of a chronic disease 1 week before surgery
- any oncological disease at the time of the examination
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Hypoxic-hyperoxic preconditioning (HHP)
HHP was carried out as follows: breathing with a hypoxic gas mixture for 10 min with the development of hypoxemia, then breathing with a hyperoxic gas mixture for 30 minutes, and at the last stage, a period of breathing with atmospheric air until the cardio-pulmonary bypass is connected.
The anaerobic threshold was determined 72 hours before surgery to establish a safe oxygen concentration in the respiratory gas mixture during the hypoxic phase of preconditioning.
|
Patients were intubated and mechanically ventilated with the target values of PaO2 and PaCO2 (80 - 120 mm Hg and 35 - 45 mm Hg, respectively) under the inhalation anesthesia.
HHP was carried out as follows: breathing with a hypoxic gas mixture for 10 min with the development of hypoxemia, then breathing with a hyperoxic gas mixture for 30 minutes, then a period of breathing with atmospheric air (normoxia and normocapnia) until the cardio-pulmonary bypass is connected.
Other Names:
|
Placebo Comparator: Control
The anaerobic threshold was determined, however, patients in the control group were not preconditioned.
Mechanical ventilation was carried out with individual settings maintaining the target values of PaO2 and PaCO2 (80 - 120 mm Hg and 35 - 45 mm Hg, respectively), until the cardio-pulmonary bypass was connected.
|
Patients were intubated and mechanically ventilated with the target values of PaO2 and PaCO2 (80 - 120 mm Hg and 35 - 45 mm Hg, respectively) under the inhalation anesthesia until the cardio-pulmonary bypass is connected.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Participants with complications
Time Frame: 60 days
|
Any type of complications in postoperative period
|
60 days
|
Mechanical ventilation
Time Frame: 60 days
|
Mechanical ventilation time
|
60 days
|
Rate of spontaneous sinus rhythm recovery
Time Frame: 14 days
|
Spontaneous sinus rhythm recovery after surgery
|
14 days
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Catecholamine support
Time Frame: 60 days
|
Catecholamine support time
|
60 days
|
Troponin T
Time Frame: 12 hours
|
Troponin T concentration
|
12 hours
|
Endothelin-1
Time Frame: 1 day before surgery
|
Endothelin-1 concentrations
|
1 day before surgery
|
Endothelin-1 dynamics 1
Time Frame: at the end of surgery
|
Endothelin-1 concentrations
|
at the end of surgery
|
Endothelin-1 dynamics 2
Time Frame: 24 hours after surgery
|
Endothelin-1 concentrations
|
24 hours after surgery
|
NOx total
Time Frame: 1 day before surgery
|
NOx total concentrations
|
1 day before surgery
|
NOx total dynamics 1
Time Frame: at the end of surgery
|
NOx total concentrations
|
at the end of surgery
|
NOx total dynamics 2
Time Frame: 24 hours after surgery
|
NOx total concentrations
|
24 hours after surgery
|
Asymmetric dimethylarginine (ADMA)
Time Frame: 1 day before surgery
|
ADMA concentrations
|
1 day before surgery
|
ADMA dymanics 1
Time Frame: at the end of surgery
|
ADMA concentrations
|
at the end of surgery
|
ADMA dymanics 2
Time Frame: 24 hours after surgery
|
ADMA concentrations
|
24 hours after surgery
|
Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Irina A Mandel, PhD, Federal Research Clinical Center FMBA Russia
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Pathologic Processes
- Myocardial Ischemia
- Heart Diseases
- Cardiovascular Diseases
- Vascular Diseases
- Arteriosclerosis
- Arterial Occlusive Diseases
- Postoperative Complications
- Signs and Symptoms, Respiratory
- Coronary Disease
- Cardiomyopathies
- Coronary Artery Disease
- Reperfusion Injury
- Myocardial Reperfusion Injury
- Hypoxia
- Hyperoxia
Other Study ID Numbers
- HHP-cardio
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Coronary Artery Disease
-
Elixir Medical CorporationIstituto Clinico HumanitasActive, not recruitingCoronary Artery Disease | Chronic Total Occlusion of Coronary Artery | Multi Vessel Coronary Artery Disease | Bifurcation of Coronary Artery | Long Lesions Coronary Artery DiseaseItaly
-
Fundación EPICActive, not recruitingCoronary Artery Disease | Left Main Coronary Artery Disease | Left Main Coronary Artery Stenosis | Restenosis, CoronarySpain
-
Peking Union Medical College HospitalNot yet recruitingCoronary Artery Disease | Inflammation | Coronary Artery Disease Progression | Coronary Artery Stenosis | Coronary Artery Restenosis | Inflammatory Disease | Inflammation VascularChina
-
Peking Union Medical College HospitalRecruitingCoronary Artery Disease | Inflammation | Coronary Artery Disease Progression | Coronary Artery Stenosis | Coronary Artery Restenosis | Inflammatory Disease | Inflammation VascularChina
-
IGLESIAS Juan FernandoUniversity of BernNot yet recruiting
-
Barts & The London NHS TrustImperial College London; Brunel UniversityNot yet recruitingCORONARY ARTERY DISEASE
-
National Institutes of Health Clinical Center (CC)National Heart, Lung, and Blood Institute (NHLBI)CompletedCoronary Arteriosclerosis | Coronary Artery Disease (CAD) | Obstructive Coronary Artery DiseaseUnited States
-
Fundación EPICRecruitingCoronary Artery Disease | Coronary Disease | Coronary Occlusion | Left Main Coronary Artery Disease | Coronary Artery StenosisSpain
-
Abbott Medical DevicesCompletedCoronary Artery Disease | Coronary Disease | Coronary Occlusion | Chronic Total Occlusion of Coronary Artery | Coronary Restenosis | Coronary Artery Stenosis | Coronary Artery RestenosisBelgium
-
China National Center for Cardiovascular DiseasesRecruitingLeft Main Coronary Artery DiseaseChina
Clinical Trials on Hypoxic-hyperoxic preconditioning
-
I.M. Sechenov First Moscow State Medical UniversityRecruitingCOVID-19 | Quality of Life | Hypertension | Arrhythmia | Chronic Heart Failure | Endothelial Dysfunction | Conduct Disorder | Oxygen Consumption | Diastolic Dysfunction | Chronic Coronary Syndrome | Exercise ToleranceRussian Federation
-
Centre Hospitalier Universitaire Saint PierreUniversité Libre de BruxellesCompletedHypoxia | Hypercapnia | Hyperventilation SyndromeBelgium
-
I.M. Sechenov First Moscow State Medical UniversityCompletedMetabolic Syndrome | Vascular Stiffness | Liver Fibroses | Trimethylamine N-oxyde | Toll-like ReceptorsRussian Federation
-
I.M. Sechenov First Moscow State Medical UniversityCompletedSurgery | Valvular Heart Disease | Aortic Arch AneurysmRussian Federation
-
University of British ColumbiaCompletedHypoxia | Sleep Disordered Breathing | Respiration; Sleep Disorder | Chemoreceptor ApneaCanada
-
Czech Technical University in PragueEnrolling by invitationHypoxia | Hypercapnia | Cardiac Output, HighCzechia
-
University of NottinghamJozef Stefan Institute; European Commission; KTH Royal Institute of TechnologyCompleted
-
Institute of Mountain Emergency MedicineUniversity of Giessen; Istituto Auxologico Italiano; University of InnsbruckRecruiting
-
Radboud University Medical CenterRecruitingParkinson DiseaseNetherlands
-
Oslo University HospitalTerminatedWound (Morphologic Abnormality)Norway