Cerebral HypoxiaTête-à-coeurNCT01432184
Feasibility Trial to Maintain Normal Cerebral Oxygen Saturation in High-Risk Cardiac Surgery
A study testing strategies to reverse decrease in rSO2 in people with Cerebral Hypoxia, run by Montreal Heart Institute at 1 site in Canada.
Trial summary
Using the brain and the heart as index organs, perioperative interventions to optimize cerebral oxygen saturation and cardiac contractility in high-risk patients undergoing cardiac surgery should have a beneficial systemic effect for enhancing global tissue perfusion and improve outcomes. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Cerebral Hypoxia
- What is being tested?
- strategies to reverse decrease in rSO2
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 200 participants
- Where
- 1 siteCanada
- Study dates
- Jul 2010to Oct 2013
- Phase
- Interventional
- Are there results?
- None posted in the registry
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
Who may be able to join
- Patients with EUROSCORES ≥ 10.
- Planned complex surgery including more than one procedure, or redo procedures.
- Patient able to read and understand the consent form.
- Patients ≥ 18 years of age.
Who cannot join
- High risk patients undergoing of off pump coronary artery bypass.
- Emergency surgeries less than 6 hours from diagnosis.
- Patient unable to read and understand the consent form.
- Patients with and IABP or a ventricular assist device
- Planned circulatory arrest
- Planned surgery of the descending aorta.
- Patients with acute endocarditis.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Perioperative Interventions to Optimize Cerebral Oxygen Saturation (rSO2) in High-risk Patients Undergoing Cardiac Surgery Should Have a Beneficial Systemic Effect for Enhancing Global Tissue Perfusion and Improve Outcomes.
Using the brain and the heart as index organs, perioperative interventions to optimize cerebral oxygen saturation and cardiac contractility in high-risk patients undergoing cardiac surgery should have a beneficial systemic effect for enhancing global tissue perfusion and improve outcomes.
Read the detailed description
The proportion of high-risk patients requiring cardiac surgery and of high-risk cardiac surgeries is increasing. These populations of patients are at increased risk of perioperative morbidity and mortality. Transesophageal echocardiography (TEE) evaluation in cardiac surgery has been shown to impact on the perioperative management of patients and to improve outcomes. Near infrared-reflectance spectroscopy (NIRS) is a technique that has been employed since the mid-1970's and that can be used as a non-invasive and continuous monitor of the balance between cerebral oxygen delivery and consumption. Two recent randomized trials have shown an association between correction of cerebral desaturation and shorter recovery room and hospital stay in non-cardiac surgery, and with a decrease in major organ dysfunction and in intensive care length of stay after coronary artery bypass. By combining NIRS and TEE in high-risk patients, optimal tissue perfusion could be achieved and perioperative morbidity and mortality could be reduced.
- Conditions
- Cerebral Hypoxia
- Being tested
- strategies to reverse decrease in rSO2
- Keywords
- cerebral, hypoxia
- Medical subject headings
- Hypoxia, Brain, Hypoxia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
strategies to reverse decrease in rSO2Procedure or surgery
Also called Cerebral Oxymetry decrease
an alarm threshold at a value of 90% of the resting baseline cerebral saturation value (baseline - 10%) will be established. To minimize the probability of patients reaching significant decreases rSO2 values, interventions to improve cerebral oxygenation will be initiated according to the strategies described in the algorithm. The success and failure of these interventions will be noted. As in the Control group, the screen will remain blinded in the ICU and the intensivist will not see the values.
| Study group | Role | What they receive |
|---|---|---|
| Intervention | Active comparator | an alarm threshold at a value of 90% of the resting baseline cerebral saturation value (baseline - 10%) will be established. To minimize the probability of patients reaching significant decreases rSO2 values, interventions to improve cerebral oxygenation will be initiated according to the strategies described in the algorithm. The success and failure of these interventions will be noted. As in the Control group, the screen will remain blinded in the ICU and the intensivist will not see the values. Receives: Procedure: strategies to reverse decrease in rSO2 |
| Control | No intervention | the cerebral oxymetry screen will be blinded and changes in NIRS values will be unknown to the anesthesiologist. The management of the case will proceed as per normal local practice. The screen will remain blinded in the ICU and the intensivist will not see the values. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Success rate of reversing decreases in cerebral oxygen saturation below 10% of baseline values to values within 10% of baseline in the INTERVENTION group.
Consensus on the appropriate strategies to prevent and reverse cerebral oxygen desaturations remains controversial. In a recent study by Slater and al.12, randomization into an intervention group failed because anesthesiologists were unable to follow the protocol aimed at strategies to reverse decreases in rSO2. A group from the Montreal Heart Institute has developed a physiologically oriented algorithm to help with the task of reversing decreases in rSO2. The goal of the present study is therefore to confirm that this approach can be used with success by most institutions.
Measured: Up to 12 hours
Secondary outcomes (4)
First 30 days post-operative outcomes
- readmission to hospital within 30 days
- death
Measured: 30 days
ICU data
- ICU admission and discharge times
- tracheal extubation time in hours
Measured: Up to 48 hours
First 24 hours complications
- clinical stroke manifested as focal neurological deficit persisting 24hr and confirmed by brain computed tomography imaging
- prolonged ventilation defined as extubation at > 24 h postoperatively
- new, persistent Q-wave myocardial infarction
Measured: 24 hours
Post-operative complications
- renal failure as defined by the RIFLE criteria
- reoperation for any cause
- arrhythmia requiring treatment
- Hospital length of stay
- wound infection requiring specific antibiotic coverage
Measured: Up to 7 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Sep 2011 (estimated)
- Study startJul 2010
- Primary completionJul 2011
- Study completionOct 2013
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (17)Papers the sponsor has linked to this study.
- Other trials for Cerebral HypoxiaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 200 participants (actual)
Sponsor and investigators
- Lead sponsor
- Montreal Heart Institute
- Sponsor type
- University, hospital or other
- Collaborators
- Université de Montréal
- Responsible party
- Principal investigator, Alain Deschamps, Montreal Heart Institute
- Investigators
- Alain Deschamps, MD, FRCPC, Principal investigator, Montreal Heart Institute
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01432184
- Sponsor's protocol ID
- ICM 08-1009
- Acronym
- Tête-à-coeur
- Status last verified
- Oct 2015
- First submitted
- 26 Aug 2011
- Last updated
- 20 Oct 2015
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Taillefer MC, Denault AY. Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy. Can J Anaesth. 2005 Jan;52(1):79-87. doi: 10.1007/BF03018586.
PubMed 15625262Kurth CD, Steven JL, Montenegro LM, Watzman HM, Gaynor JW, Spray TL, Nicolson SC. Cerebral oxygen saturation before congenital heart surgery. Ann Thorac Surg. 2001 Jul;72(1):187-92. doi: 10.1016/s0003-4975(01)02632-7.
PubMed 11465176Hadolt I, Litscher G. Noninvasive assessment of cerebral oxygenation during high altitude trekking in the Nepal Himalayas (2850-5600 m). Neurol Res. 2003 Mar;25(2):183-8. doi: 10.1179/016164103101201175.
PubMed 12635520Casati A, Fanelli G, Pietropaoli P, Proietti R, Tufano R, Danelli G, Fierro G, De Cosmo G, Servillo G; Collaborative Italian Study Group on Anesthesia in Elderly Patients. Continuous monitoring of cerebral oxygen saturation in elderly patients undergoing major abdominal surgery minimizes brain exposure to potential hypoxia. Anesth Analg. 2005 Sep;101(3):740-747. doi: 10.1213/01.ane.0000166974.96219.cd.
PubMed 16115985Murkin JM, Adams SJ, Novick RJ, Quantz M, Bainbridge D, Iglesias I, Cleland A, Schaefer B, Irwin B, Fox S. Monitoring brain oxygen saturation during coronary bypass surgery: a randomized, prospective study. Anesth Analg. 2007 Jan;104(1):51-8. doi: 10.1213/01.ane.0000246814.29362.f4.
PubMed 17179242Denault A, Deschamps A, Murkin JM. A proposed algorithm for the intraoperative use of cerebral near-infrared spectroscopy. Semin Cardiothorac Vasc Anesth. 2007 Dec;11(4):274-81. doi: 10.1177/1089253207311685.
PubMed 18270192Jobsis FF. Non-invasive, infra-red monitoring of cerebral O2 sufficiency, bloodvolume, HbO2-Hb shifts and bloodflow. Acta Neurol Scand Suppl. 1977;64:452-3. No abstract available.
PubMed 268870Edmonds HL Jr, Ganzel BL, Austin EH 3rd. Cerebral oximetry for cardiac and vascular surgery. Semin Cardiothorac Vasc Anesth. 2004 Jun;8(2):147-66. doi: 10.1177/108925320400800208.
PubMed 15248000Sokol DK, Markand ON, Daly EC, Luerssen TG, Malkoff MD. Near infrared spectroscopy (NIRS) distinguishes seizure types. Seizure. 2000 Jul;9(5):323-7. doi: 10.1053/seiz.2000.0406.
PubMed 10933986Shojima M, Watanabe E, Mayanagi Y. Cerebral blood oxygenation after cerebrospinal fluid removal in hydrocephalus measured by near infrared spectroscopy. Surg Neurol. 2004 Oct;62(4):312-8; discussion 318. doi: 10.1016/j.surneu.2003.09.035.
PubMed 15451273Gracias VH, Guillamondegui OD, Stiefel MF, Wilensky EM, Bloom S, Gupta R, Pryor JP, Reilly PM, Leroux PD, Schwab CW. Cerebral cortical oxygenation: a pilot study. J Trauma. 2004 Mar;56(3):469-72; discussion 472-4. doi: 10.1097/01.ta.0000114274.95423.c0.
PubMed 15128115Vernieri F, Tibuzzi F, Pasqualetti P, Rosato N, Passarelli F, Rossini PM, Silvestrini M. Transcranial Doppler and near-infrared spectroscopy can evaluate the hemodynamic effect of carotid artery occlusion. Stroke. 2004 Jan;35(1):64-70. doi: 10.1161/01.STR.0000106486.26626.E2. Epub 2003 Dec 18.
PubMed 14684777Yao FS, Tseng CC, Ho CY, Levin SK, Illner P. Cerebral oxygen desaturation is associated with early postoperative neuropsychological dysfunction in patients undergoing cardiac surgery. J Cardiothorac Vasc Anesth. 2004 Oct;18(5):552-8. doi: 10.1053/j.jvca.2004.07.007.
PubMed 15578464Slater JP, Guarino T, Stack J, Vinod K, Bustami RT, Brown JM 3rd, Rodriguez AL, Magovern CJ, Zaubler T, Freundlich K, Parr GV. Cerebral oxygen desaturation predicts cognitive decline and longer hospital stay after cardiac surgery. Ann Thorac Surg. 2009 Jan;87(1):36-44; discussion 44-5. doi: 10.1016/j.athoracsur.2008.08.070.
PubMed 19101265de Tournay-Jette E, Dupuis G, Bherer L, Deschamps A, Cartier R, Denault A. The relationship between cerebral oxygen saturation changes and postoperative cognitive dysfunction in elderly patients after coronary artery bypass graft surgery. J Cardiothorac Vasc Anesth. 2011 Feb;25(1):95-104. doi: 10.1053/j.jvca.2010.03.019. Epub 2010 Jul 22.
PubMed 20650659
Study at a glance
From the registry record, last updated by the sponsor on 20 Oct 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Perioperative Interventions to Optimize Cerebral Oxygen Saturation (rSO2) in High-risk Patients Undergoing Cardiac Surgery Should Have a Beneficial Systemic Effect for Enhancing Global Tissue Perfusion and Improve Outcomes.
- ClinicalTrials.gov ID
- NCT01432184
- Acronym / sponsor ID
- Tête-à-coeur / ICM 08-1009
- Conditions
- Cerebral Hypoxia
- Keywords
- cerebral, hypoxia
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 200 participants (actual)
- Lead sponsor
- Montreal Heart InstituteUniversity, hospital or other
- Collaborators
- Université de Montréal
- Study start
- Jul 2010
- Primary completion
- Jul 2011 (actual)
- Study completion
- Oct 2013 (actual)
- First posted
- 12 Sep 2011 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Using the brain and the heart as index organs, perioperative interventions to optimize cerebral oxygen saturation and cardiac contractility in high-risk patients undergoing cardiac surgery should have a beneficial systemic effect for enhancing global tissue perfusion and improve outcomes.
Detailed description
The proportion of high-risk patients requiring cardiac surgery and of high-risk cardiac surgeries is increasing. These populations of patients are at increased risk of perioperative morbidity and mortality. Transesophageal echocardiography (TEE) evaluation in cardiac surgery has been shown to impact on the perioperative management of patients and to improve outcomes. Near infrared-reflectance spectroscopy (NIRS) is a technique that has been employed since the mid-1970's and that can be used as a non-invasive and continuous monitor of the balance between cerebral oxygen delivery and consumption. Two recent randomized trials have shown an association between correction of cerebral desaturation and shorter recovery room and hospital stay in non-cardiac surgery, and with a decrease in major organ dysfunction and in intensive care length of stay after coronary artery bypass. By combining NIRS and TEE in high-risk patients, optimal tissue perfusion could be achieved and perioperative morbidity and mortality could be reduced.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Intervention | Active comparator | Procedure: strategies to reverse decrease in rSO2an alarm threshold at a value of 90% of the resting baseline cerebral saturation value (baseline - 10%) will be established. To minimize the probability of patients reaching significant decreases rSO2 values, interventions to improve cerebral oxygenation will be initiated according to the strategies described in the algorithm. The success and failure of these interventions will be noted. As in the Control group, the screen will remain blinded in the ICU and the intensivist will not see the values. |
| Control | No intervention | –the cerebral oxymetry screen will be blinded and changes in NIRS values will be unknown to the anesthesiologist. The management of the case will proceed as per normal local practice. The screen will remain blinded in the ICU and the intensivist will not see the values. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Patients with EUROSCORES ≥ 10.
- Planned complex surgery including more than one procedure, or redo procedures.
- Patient able to read and understand the consent form.
- Patients ≥ 18 years of age.
Key exclusion criteria (7 listed)
- High risk patients undergoing of off pump coronary artery bypass.
- Emergency surgeries less than 6 hours from diagnosis.
- Patient unable to read and understand the consent form.
- Patients with and IABP or a ventricular assist device
- Planned circulatory arrest
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| strategies to reverse decrease in rSO2Also: Cerebral Oxymetry decreasean alarm threshold at a value of 90% of the resting baseline cerebral saturation value (baseline - 10%) will be established. To minimize the probability of patients reaching significant decreases rSO2 values, interventions to improve cerebral oxygenation will be initiated according to the strategies described in the algorithm. The success and failure of these interventions will be noted. As in the Control group, the screen will remain blinded in the ICU and the intensivist will not see the values. | Procedure or surgery | Intervention |
Primary outcome
Success rate of reversing decreases in cerebral oxygen saturation below 10% of baseline values to values within 10% of baseline in the INTERVENTION group.
Time frame: Up to 12 hours
Consensus on the appropriate strategies to prevent and reverse cerebral oxygen desaturations remains controversial. In a recent study by Slater and al.12, randomization into an intervention group failed because anesthesiologists were unable to follow the protocol aimed at strategies to reverse decreases in rSO2. A group from the Montreal Heart Institute has developed a physiologically oriented algorithm to help with the task of reversing decreases in rSO2. The goal of the present study is therefore to confirm that this approach can be used with success by most institutions.
4 secondary outcomes
First 30 days post-operative outcomes
Time frame: 30 days
ICU data
Time frame: Up to 48 hours
First 24 hours complications
Time frame: 24 hours
Post-operative complications
Time frame: Up to 7 days
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Oct 2015.
- Background: PubMed 15625262Taillefer MC, Denault AY. Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy. Can J Anaesth. 2005 Jan;52(1):79-87. doi: 10.1007/BF03018586.
- Background: PubMed 11465176Kurth CD, Steven JL, Montenegro LM, Watzman HM, Gaynor JW, Spray TL, Nicolson SC. Cerebral oxygen saturation before congenital heart surgery. Ann Thorac Surg. 2001 Jul;72(1):187-92. doi: 10.1016/s0003-4975(01)02632-7.
- Background: PubMed 12635520Hadolt I, Litscher G. Noninvasive assessment of cerebral oxygenation during high altitude trekking in the Nepal Himalayas (2850-5600 m). Neurol Res. 2003 Mar;25(2):183-8. doi: 10.1179/016164103101201175.
- Background: PubMed 16115985Casati A, Fanelli G, Pietropaoli P, Proietti R, Tufano R, Danelli G, Fierro G, De Cosmo G, Servillo G; Collaborative Italian Study Group on Anesthesia in Elderly Patients. Continuous monitoring of cerebral oxygen saturation in elderly patients undergoing major abdominal surgery minimizes brain exposure to potential hypoxia. Anesth Analg. 2005 Sep;101(3):740-747. doi: 10.1213/01.ane.0000166974.96219.cd.
- Background: PubMed 17179242Murkin JM, Adams SJ, Novick RJ, Quantz M, Bainbridge D, Iglesias I, Cleland A, Schaefer B, Irwin B, Fox S. Monitoring brain oxygen saturation during coronary bypass surgery: a randomized, prospective study. Anesth Analg. 2007 Jan;104(1):51-8. doi: 10.1213/01.ane.0000246814.29362.f4.
- Background: PubMed 18270192Denault A, Deschamps A, Murkin JM. A proposed algorithm for the intraoperative use of cerebral near-infrared spectroscopy. Semin Cardiothorac Vasc Anesth. 2007 Dec;11(4):274-81. doi: 10.1177/1089253207311685.
- Background: PubMed 268870Jobsis FF. Non-invasive, infra-red monitoring of cerebral O2 sufficiency, bloodvolume, HbO2-Hb shifts and bloodflow. Acta Neurol Scand Suppl. 1977;64:452-3. No abstract available.
- Background: PubMed 15248000Edmonds HL Jr, Ganzel BL, Austin EH 3rd. Cerebral oximetry for cardiac and vascular surgery. Semin Cardiothorac Vasc Anesth. 2004 Jun;8(2):147-66. doi: 10.1177/108925320400800208.
- Background: PubMed 10933986Sokol DK, Markand ON, Daly EC, Luerssen TG, Malkoff MD. Near infrared spectroscopy (NIRS) distinguishes seizure types. Seizure. 2000 Jul;9(5):323-7. doi: 10.1053/seiz.2000.0406.
- Background: PubMed 15451273Shojima M, Watanabe E, Mayanagi Y. Cerebral blood oxygenation after cerebrospinal fluid removal in hydrocephalus measured by near infrared spectroscopy. Surg Neurol. 2004 Oct;62(4):312-8; discussion 318. doi: 10.1016/j.surneu.2003.09.035.
- Background: PubMed 15128115Gracias VH, Guillamondegui OD, Stiefel MF, Wilensky EM, Bloom S, Gupta R, Pryor JP, Reilly PM, Leroux PD, Schwab CW. Cerebral cortical oxygenation: a pilot study. J Trauma. 2004 Mar;56(3):469-72; discussion 472-4. doi: 10.1097/01.ta.0000114274.95423.c0.
- Background: PubMed 14684777Vernieri F, Tibuzzi F, Pasqualetti P, Rosato N, Passarelli F, Rossini PM, Silvestrini M. Transcranial Doppler and near-infrared spectroscopy can evaluate the hemodynamic effect of carotid artery occlusion. Stroke. 2004 Jan;35(1):64-70. doi: 10.1161/01.STR.0000106486.26626.E2. Epub 2003 Dec 18.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Alain Deschamps, MD, FRCPC principal investigator
Montreal Heart Institute
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing strategies to reverse decrease in rSO2 in people with Cerebral Hypoxia, run by Montreal Heart Institute at 1 site in Canada.
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 4 inclusion and 7 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: finished, as of the sponsor's last update on 20 Oct 2015. 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 Canada. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Success rate of reversing decreases in cerebral oxygen saturation below 10% of baseline values to values within 10% of baseline in the INTERVENTION group. (time frame: Up to 12 hours). 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 NCT01432184, which also lists 17 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 20 Oct 2015.