Neurocritical care
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Multicenter Study Comparative Study
A multicenter comparison of outcomes associated with intravenous nitroprusside and nicardipine treatment among patients with intracerebral hemorrhage.
No clinical data exist to compare outcomes between patients with intracerebral hemorrhage (ICH) treated with different intravenous antihypertensive agents. This study was performed to compare outcomes among patients with ICH who were treated with intravenous infusion of different antihypertensive medications during the first 24 hours after admission. ⋯ Use of nicardipine compared with nitroprusside infusion during the first 24 h after ICH may be associated with reduced risk of in-hospital mortality without any increase in the hospitalization cost or length of stay.
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The methods for continuous assessment of cerebral autoregulation using correlation, phase shift, or transmission (either in time- or frequency-domain) were introduced a decade ago. They express dynamic relationships between slow waves of transcranial Doppler (TCD), blood flow velocity (FV) and cerebral perfusion pressure (CPP), or arterial pressure (ABP). We review a methodology and clinical application of indices useful for monitoring cerebral autoregulation and pressure-reactivity in various scenarios of neuro-critical care.
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Randomized Controlled Trial Comparative Study
IV vs. IA TPA in acute ischemic stroke with CT angiographic evidence of major vessel occlusion: a feasibility study.
Studies suggest that stroke patients with thrombus in a major cerebral vessel respond less favorably to intravenous (IV) thrombolysis. The purpose of this study was to test the feasibility of a protocol comparing IV versus intra-arterial (IA) recombinant tissue plasminogen activator (TPA) in an acute ischemic stroke with major vessel occlusion. ⋯ We found that it is feasible to conduct a trial comparing IV vs. IA TPA in ischemic stroke patients with major vessel occlusion presenting <3 h from onset. Patients treated with IA TPA showed a trend toward higher rate of recanalization. A larger trial may be designed to test safety and effectiveness of IA TPA in this specific group of stroke patients.
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Comparative Study
Reactivity of brain tissue oxygen to change in cerebral perfusion pressure in head injured patients.
It has been reported recently that correlation between brain tissue oxygen (PbtO2) and cerebral perfusion pressure (CPP) may serve as an indicator of cerebral autoregulation after subarachnoid hemorrhage. We aimed to compare similar indices describing interaction between changes in intracranial pressure (ICP), arterial blood pressure (ABP), and brain tissue oxygen to verify their clinical utility in patients after traumatic brain injury. ⋯ The relationships between PbtO2, ORx, and CPP in head injury appear less useful than reported before for patients after subarachnoid hemorrhage.
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Controlled Clinical Trial
Correlation of cerebral Near-infrared spectroscopy (cNIRS) and neurological markers in critically ill children.
To correlate regional brain saturations (RSO(2)) measured by cerebral Near-infrared spectroscopy (cNIRS) with serological markers indicative of neurological injury (neuron-specific enolase (NSE) and S100beta). ⋯ This is the first study to correlate averaged RSO(2) measured by cNIRS with neurological injury markers in critically ill children. We believe that this data can be used to establish thresholds for RSO(2) that can be tested in future trials to determine if this technology is predictive of long-term neurological outcome.