The Effect of Clevidipine on Intracranial Pressure and Cerebral Perfusion Pressure (CCP) in Brain Injured Patients
| Status: | Completed |
|---|---|
| Conditions: | High Blood Pressure (Hypertension), Neurology |
| Therapuetic Areas: | Cardiology / Vascular Diseases, Neurology |
| Healthy: | No |
| Age Range: | Any |
| Updated: | 2/4/2013 |
| Start Date: | November 2011 |
| End Date: | November 2012 |
| Contact: | Stephan A Mayer, MD |
| Email: | sam14@columbia.edu |
| Phone: | 212-305-7236 |
Effect of Clevidipine on Intracranial Pressure, Cerebral Blood Flow, Brain Tissue Oxygenation and Brain Cellular Metabolism in Severely Hypertensive Patients With Acute Brain Injury
Patients with acute brain injury are at risk for complications such as increased pressure in
the brain (intracranial pressure, ICP), decreased blood flow, bleeding, and brain swelling
(cerebral edema). Several studies have suggested that high blood pressure is associated with
a worsening outcome possibly due to an increased rate of continued bleeding or rebleeding,
as well as increased brain swelling (cerebral edema). High systemic (body) blood pressure
(SBP) may also increase the risk of ongoing bleeding. Therefore lowering the blood pressure
(BP) is critical, as continued bleeding occurs most frequently in patients with high BP.
Clevidipine Butyrate (Cleviprex) is a new medication approved by the FDA for the treatment
of acute high blood pressure (hypertension). Cleviprex is given through an intravenous line
(IV) and has the benefit of being faster acting and easier to control adjustments than other
drugs used to treat high BP. Patients who have an acute brain injury and who have severe
high BP may benefit from this faster acting medication.
For this study, eligible patients, 18 yrs of age or older, will have been admitted to the
Neurocritical care unit within 24 hours after their brain injury, who have high systemic
(body) SBP. The treating physicians will have already had multimodality brain monitoring
placed for clinical management of the patient (standard care).
The investigators will use Cleviprex to lower their SBP and record brain pressure and brain
blood flow measurements from the multimodality monitoring. Due to the severity of their
brain injury most of the patients eligible for the study will be unable to provide consent.
Informed consent will be sought from a surrogate (family member, spouse or close friend)
according to CUMC guidelines.
Cleviprex is fast acting and effects are seen in about 90 seconds. The medication will be
started at a low rate, and if the SBP still needs lowering, the dose increased every 90
seconds until the maximum FDA approved dose is reached. If the SBP is still high, another
medication used to treat high blood pressure will be added (Cardene or labetolol).
Once the SBP is lowered and is stable, the Cleviprex will be continued for 6 hours. As part
of standard care, patients have their blood pressure monitored continuously. After 6 hours
the treating physician will make a determination to continue clinical management with
cleviprex or another antihypertensive medication.
This is an open-label, single arm, single center study in patients with hypertension in the
setting of an acute brain injury. Approximately 15 patients admitted to the Columbia
University Neurocritical Care Unit with intracerebral hemorrhage, subarachnoid hemorrhage or
traumatic brain injury who are hypertensive and have neuromonitoring probes placed in the
course of standard clinical management will be enrolled over a 10-12 month period. Patients
must be hypertensive (SBP > 180mmHg), or have an elevated cerebral perfusion pressure (CPP,
above 100 mm Hg) and the decision has been made by the ICU team to initiate an infusion of
clevidipine to maintain CPP within a target range of 70-90 mm Hg and SBP between
120-180mmHg.
Due to the decreased level of consciousness from their injury, the majority of patients will
be unable to provide consent. Informed consent will be sought from a surrogate according to
Columbia University Medical Center (CUMC) guidelines (See section 8-Informed Consent
Process).
Clevidipine infusion will be used to treat hypertension within the first 24 hours after
injury. Multi-modality brain monitoring will have been placed as standard care.
Clevidipine will be infused at an initial rate of 2.0 mg/h for the first 90 seconds and
titrated to effect (CPP target range of 70-90 mm Hg) by either doubling or reducing the dose
by 50% every 90 seconds (with dose ranging 0-32mg/h of continuous IV infusion).
At the end of 6 hours clevidipine treatment, the treating physician will make a
determination to continue clinical management with clevidipine or change to another
antihypertensive medication.
Patients will be monitored at 24 hours after infusion for liver function, triglycerides and
lipase.
Inclusion Criteria:
1. Coma (GCS less than or equal to 8) due to any cause
2. Male and Female patients > 18 years.
3. Mechanically ventilated
4. Functional multimodality neuromonitoring bundle (ICP monitor, Hemedex, Licox, and
microdialysis) placed in the course of routine clinical management
5. Patient is hypertensive at the time of enrollment (CPP >100 mm Hg and/or SBP
>180mmHg) and the decision has been made to start clevidipine butyrate in order to
maintain CPP within 70-90 mm Hg and/or SBP <180mmHg
6. Patient has a minimum of 60 min of baseline brain multimodality monitoring prior to
initiation of clevidipine -
Exclusion Criteria:
1. Absence of negative pregnancy test in women of child-bearing potential.
2. FiO2 >50%
3. Unable to maintain stable sedative infusion rates for 4 hours
4. Unable to maintain stable ventilator setting for 4 hours
5. Unable to maintain stable insulin infusion rates for 4 hours
6. Patient is currently receiving nicardipine infusion
7. Allergy to soybean oil or lecithin
8. Participation in other clinical research studies involving the evaluation of other
investigational drugs or devices within 30 days of enrollment.
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