Brain Injuries, Traumatic Clinical Trial
— COGITATEOfficial title:
A Randomized Clinical Trial Assessing the Effect of "Optimal" Cerebral Perfusion Pressure Monitoring in the Management of Severe Traumatic Brain Injury
Verified date | September 2020 |
Source | Maastricht University Medical Center |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
Despite improvements in management, mortality in severe traumatic brain injury (TBI) remains
25% and only 40% of patients survive without major handicap. Medical/surgical interventions
aim to maintain adequate brain perfusion, which is critically dependent on cerebral perfusion
pressure (CPP); calculated as the difference between mean arterial pressure (MAP) and
intracranial pressure (ICP). Current guidelines aim for a CPP above 50 mmHg, based on
population means. However, this 'one size fits all' approach is flawed, because the relation
between CPP and brain perfusion varies between individuals. Further, this approach takes no
account of autoregulation, a key protective mechanism that maintains cerebral perfusion
despite CPP fluctuations.
Autoregulation is variably preserved following TBI, and there are large between patient
variances in the 'optimal' CPP (CPPopt) at which autoregulation operates best. Individual
CPPopt can be retrieved automatically by plotting autoregulation data against the CPP over a
certain time window. The investigators have shown that maintenance of CPP close to CPPopt is
associated with improved outcomes. These data pose the hypothesis that optimisation of
management in individuals may be achieved by using the zone of optimal autoregulation as a
basis for defining individualised CPP targets.
The investigators propose, together with collaborators in the CPPopt study group (Maastricht,
Cambridge, Leuven and Aachen) to set up a pilot (multicenter) feasibility study to develop a
protocol for a definitive outcome randomized controlled trial (RCT). This study aims to
develop protocols for CPPopt guided critical care, and show that they maintain patients
closer to their optimum perfusion levels than standard protocols which keep above a
population CPP threshold of 60 mmHg.
Hence, the main objective is to offer clinicians monitoring and therapy algorithms that
achieve individualized optimal CPPopt targets and potentially improve TBI outcome.
Status | Completed |
Enrollment | 60 |
Est. completion date | February 27, 2020 |
Est. primary completion date | February 27, 2020 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years and older |
Eligibility |
Inclusion Criteria: - Any adult severe TBI patient requiring multimodality monitoring and ICP-directed therapy for at least 24 hrs on the assessment of the recruiting team. - Start randomization within 24 hrs after ICU admission. - Deferred informed consent or deferred proxy assent from relatives/legal representative (consultee). - Exception for enrolling a patient past the 24 hour window: A patient who is admitted to the hospital and later experiences neuro-worsening that is not due to a systemic insult, (e.g. myocardial infarction, arrhythmia, pulmonary embolus, systemic hemorrhage) but due to a presumptive intracranial cause, and subsequently requires an ICP monitor, may be screened for enrolment. Consent, randomization, and monitor placement must be done within 48 hours from injury in order for the patient to qualify. Exclusion Criteria: - Patients < 18 years old. - Known pregnancy. - Moribund at presentation (e.g. bilaterally absent pupillary responses) - Patients with primary decompressive craniectomy. - Patients already enrolled in > 1 other research studies. |
Country | Name | City | State |
---|---|---|---|
Belgium | Academic Hospital Leuven | Leuven | |
United Kingdom | The Addenbrooke's Hospital | Cambridge |
Lead Sponsor | Collaborator |
---|---|
Maastricht University Medical Center | European Society of Intensive Care Medicine |
Belgium, United Kingdom,
Aries MJ, Czosnyka M, Budohoski KP, Steiner LA, Lavinio A, Kolias AG, Hutchinson PJ, Brady KM, Menon DK, Pickard JD, Smielewski P. Continuous determination of optimal cerebral perfusion pressure in traumatic brain injury. Crit Care Med. 2012 Aug;40(8):245 — View Citation
Aries MJ, Wesselink R, Elting JW, Donnelly J, Czosnyka M, Ercole A, Maurits NM, Smielewski P. Enhanced Visualization of Optimal Cerebral Perfusion Pressure Over Time to Support Clinical Decision Making. Crit Care Med. 2016 Oct;44(10):e996-9. doi: 10.1097/ — View Citation
Donnelly J, Aries MJ, Czosnyka M. Further understanding of cerebral autoregulation at the bedside: possible implications for future therapy. Expert Rev Neurother. 2015 Feb;15(2):169-85. doi: 10.1586/14737175.2015.996552. Review. — View Citation
Zuercher P, Groen JL, Aries MJ, Steyerberg EW, Maas AI, Ercole A, Menon DK. Reliability and Validity of the Therapy Intensity Level Scale: Analysis of Clinimetric Properties of a Novel Approach to Assess Management of Intracranial Pressure in Traumatic Br — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Percentage of monitoring time with measured CPP within 5 mmHg of calculated CPPopt | Main feasible endpoint: In pilot studies, we showed that, on average, patients spent a mean (+SD) of 30% ( 8%) of their monitored time with measured CPP within 5 mmHg of CPPopt. The study will be powered to target an increase in this metric to 50% of monitored time. | First 5 days during intensive care unit admission | |
Secondary | Treatment Intensity Level (TIL) score | Main safety secondary endpoint: A change in daily TIL score of > 3 is representative of a clinical significant escalation of TBI treatment from basic ICP management to second tier therapies known to carry risk of harm and therefore is expected to represent a clinically significant potentially harmful effect of CPPopt guided management. | First 5 days during intensive care unit admission |
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