Cerebral Oxygenation and Neurological Outcomes FOllowing CriticAL Illness-2 (CONFOCAL-2)
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|ClinicalTrials.gov Identifier: NCT03141619|
Recruitment Status : Recruiting
First Posted : May 5, 2017
Last Update Posted : September 5, 2019
|Condition or disease|
|Critical Illness Respiratory Failure Shock Delirium|
|Study Type :||Observational|
|Estimated Enrollment :||500 participants|
|Official Title:||Cerebral Oxygenation and Neurological Outcomes FOllowing CriticAL Illness-2|
|Actual Study Start Date :||October 13, 2017|
|Estimated Primary Completion Date :||June 2022|
|Estimated Study Completion Date :||June 2023|
Respiratory failure and/or shock
All enrolled patients will undergo 72 hours of monitoring of cerebral oxygenation with near-infrared spectroscopy.
- Regional cerebral oxygenation (rSO2) and delirium [ Time Frame: 30 days ]Multivariate linear regression will be used to characterize the association between poor cerebral perfusion (as measured using duration of time (minutes) outside of MAPOPT, mean rSO2, and duration of disturbed cerebral autoregulation) and delirium severity to determine if poor cerebral perfusion is an independent predictor of delirium severity. We will estimate the unadjusted effect of each individual predictor on delirium severity (i.e., cumulative CAM-7 scores per patient). The simultaneous multivariate regression model will adjust for the following covariates (sex, a history of hypertension, a history of alcohol abuse, total sedative dose (in midazolam equivalents), total narcotic dose (fentanyl equivalents), severity of illness (APACHE II scores), pre-existing cognitive impairment (CDR score), length of ICU stay, and blood urea nitrogen. The multivariable model will provide the adjusted regression coefficients after controlling for all predictors included in the model.
- Assessment of secondary outcomes-physiological determinants of cerebral oxygenation [ Time Frame: 72 hours ]To assess the physiological determinants of rSO2, multiple linear regression will be performed using the patient average of each variable over the 72 hour data collection period. The following predictors will be included in the regression model: heart rate (HR), arterial oxygen saturation (SpO2), MAP, arterial blood gas data (i.e., pH, partial pressure of oxygen, and partial pressure of carbon dioxide), central venous oxygen saturation, and hemoglobin concentration (Hb). In addition, the multivariate model will control for the following covariates associated with cerebral perfusion: sex, age, as well as total sedative, narcotic, and vasopressor dosing. Simultaneous multiple linear regression with adjustment for all aforementioned covariates will be implemented. A within patient repeated measures analysis will also be performed by using the linear mixed effects model with 6 observations per subject reflecting each 12 hour period during the 72 hour data collection period.
- Cerebral oxygenation as an independent risk factor for long-term cognitive impairment-RBANS [ Time Frame: 3 months and 12 months ]Multiple linear regression analysis will be used to assess if poor cerebral perfusion (i.e. time below MAPOPT, mean rSO2, duration of disturbed cerebral autoregulation) is associated with RBANS global cognition scores at 3- and 12-months post-ICU discharge. We will use the following clinical covariates collected on admission (i.e., pre-existing cognitive impairment, age, severity of illness) and data collected within the first 72 hours of the patients' ICU stay (i.e., narcotic dosing and benzodiazepine dosing). All covariates will be adjusted for in separate regression models for the cognitive outcomes at 3- and 12-months post-ICU discharge. If global cognition is significantly predicted by the impaired cerebral perfusion, we will conduct an exploratory analysis of the RBANS subdomains of cognition (i.e., delay and immediate memory, language, attention, visuospatial/constructional) adjusting for the aforementioned covariates to further explore specific domains of impairment.
- Time outside optimal MAP [ Time Frame: 72h, 3- and 12-months ]We define the optimal MAP as the MAP at which there is no statistically significant correlation between MAP and rSO2. The time outside the optimal MAP will be calculated, and will be assessed as an independent predictor of delirium, and 3- and 12-month cognitive outcomes.
- Robotic quantification of neurological recovery [ Time Frame: 3 and 12 months ]A the Kingston site, participants will undergo additional neurological assessments with the KINARM robot and associated tasks. This data will be analyzed descriptively
Biospecimen Retention: Samples Without DNA
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03141619
|Contact: J. Gordon Boyd, MD, PhD||613-549-6666 ext firstname.lastname@example.org|
|Contact: Miranda Hunt||613-549-6666||huntm4@KGH.KARI.NET|
|Kingston General Hospital||Recruiting|
|Kingston, Ontario, Canada, K7L3V7|
|Contact: John G Boyd, MD, PhD 613-549-6666 ext 6228 email@example.com|
|Principal Investigator:||J. Gordon Boyd, MD, PhD||Queen's University|