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BACKGROUND This study assesses the utility of a hybrid optical instrument for noninvasive transcranial monitoring in the neurointensive care unit. The instrument is based on diffuse correlation spectroscopy (DCS) for measurement of cerebral blood flow (CBF), and near-infrared spectroscopy (NIRS) for measurement of oxy- and deoxy-hemoglobin concentration.(More)
OBJECT The object of this study was to determine whether brain tissue oxygen (PbtO(2))-based therapy or intracranial pressure (ICP)/cerebral perfusion pressure (CPP)-based therapy is associated with improved patient outcome after severe traumatic brain injury (TBI). METHODS Seventy patients with severe TBI (postresuscitation GCS score < or = 8), admitted(More)
OBJECT Poor outcome is common after aneurysmal subarachnoid hemorrhage (SAH). Clinical studies suggest that cerebral hypoxia after traumatic brain injury is associated with poor outcome. In this study we examined the relationship between brain oxygen tension (PbtO(2)) and death after aneurysmal SAH. METHODS Forty-six patients, including 34 women and 12(More)
" Diffuse correlation spectroscopy " (DCS) is a technology for non-invasive transcranial measurement of cerebral blood flow (CBF) that can be hybridized with " near-infrared spectroscopy " (NIRS). Taken together these methods hold potential for monitoring hemodynamics in stroke patients. We explore the utility of DCS and NIRS to measure effects of(More)
The authors review literature that challenges the view that vasospasm involving large arteries is the exclusive cause of delayed ischemic neurological deficits (DINDs) following subarachnoid hemorrhage. They discuss alternative mechanisms and review the evidence supporting a potential role for thromboembolism. They conclude that vasospasm and(More)
BACKGROUND AND PURPOSE The optimal hemoglobin (Hgb) target after aneurysmal subarachnoid hemorrhage is not precisely known. We sought to examine the threshold of Hgb concentration associated with an increased risk of cerebral metabolic dysfunction in patients with poor-grade subarachnoid hemorrhage. METHODS Twenty consecutive patients with poor-grade(More)
OBJECTIVE Red blood cell transfusion (RBCT) is associated with medical complications in general medical and surgical patients. We examined the hypothesis that RBCT during intensive care unit (ICU) care is associated with medical complications after subarachnoid hemorrhage (SAH). METHODS We retrospectively analyzed a prospective observational database(More)
BACKGROUND Studies in traumatic brain injury suggest that monitoring techniques such as brain tissue oxygen (P(BTO₂)) and cerebral microdialysis may complement conventional intracranial pressure (ICP) and cerebral perfusion pressure (CPP) measurements. OBJECTIVE In this study of poor-grade (Hunt and Hess grade IV and V) subarachnoid hemorrhage (SAH)(More)