"A new device worn like a visor can detect emergent largevessel occlusion in patients with suspected stroke with  percent accuracy report clinical investigators at the Medical University of South Carolina MUSC Mount Sinai the University of Tennessee Health Sciences Center and elsewhere in an article published online on March   in the Journal of Neurointerventional Surgery. Patients with largevessel occlusions can then be routed to a Comprehensive Stroke Center with endovascular capabilities. In contrast a standard physical examination achieved only  to  percent accuracy in identifying patients with largevessel occlusion who could benefit from endovascular therapy.    The volumetric impedance phase shift spectroscopy VIPS device Cerebrotech VisorTM Cerebrotech Medical Systems Pleasanton CA works by sending lowenergy radio waves through the brain that change frequency when passing through fluids. Such waves are reflected back through the brain and then detected by the device. When a patient is having a severe stroke the brains fluids will change producing an asymmetry in the radio waves detected by the VIPS device. The greater the asymmetry the more severe the stroke.    Endovascular therapy within  hours is the standard of care for emergent largevessel occlusion but the chance of achieving a good outcome decreases by approximately  percent for each hour that passes before treatment.    The researchers hope that the device will save valuable time  especially important in stroke where time is brain  when it is deployed with emergency medical personnel in the field. This is because the accuracy of the device simplifies the decision made by emergency personnel about where to take patients first according to Raymond D. Turner M.D. professor of neurosurgery and chief of the Neuroscience Integrated Center of Clinical Excellence at MUSC. Turner served as principal investigator for MUSC in the VIPS for the NonInvasive Detection of Hemispheric Bioimpedance Asymmetry in Severe Brain Pathology VITAL study reported in the article.    Transfer between hospitals takes a lot of time said Turner. If we can give the information to emergency personnel out in the field that this is a largevessel occlusion that should change their thought process in triage as to which hospital they go to.    In the study the VIPS device was deployed with emergency medical personnel in regions served by five Comprehensive Stroke Centers equipped with the endovascular capabilities to treat largevessel occlusions that underlie severe stroke. Their goal was to use the device to accurately identify severe stroke and then compare the results to established physical examination methods practiced by emergency personnel such as the Prehospital Acute Stroke Severity Scale.    Both healthy participants and patients with suspected stroke were evaluated by emergency personnel using the VIPS device. Three readings were taken and averaged  a process that takes about  seconds. Patients were also later evaluated by neurologists who provided definitive diagnoses using neuroimaging.    Compared to the neurologists diagnoses the device displayed  percent specificity  the ability to detect the difference between patients with severe stroke and those with other conditions such as mild stroke or healthy participants with no brain pathology. This places the VIPS device above standard physical examination tools used by emergency personnel that display specificity scores between  and  percent.    The VIPS device is made by Cerebrotech Medical Systems which paid consultants to analyze the neuroimaging data independently. The neuroimaging data was needed to teach the VIPS device which radio waves were indicative of stroke. Yet the consultants did not have access to the VIPS radio wave data during their review of the images thereby eliminating the potential of the consultants to choose data that might artificially inflate the devices accuracy. It is also not clear how the device would work for patients with cranial implants as metal interferes with the devices operating radio frequencies.    The devices success may be found in its ability to give emergency personnel a clear answer as to whether a patient is experiencing a severe stroke. The VIPS device requires very little training to operate compared to that required to learn standard emergency examination skills thereby reducing the possibility of human error during emergency diagnosis.    In their next steps the researchers are undertaking the VITAL . study to determine if the VIPS device can use complex machine learning algorithms to teach itself how to discriminate between minor and severe stroke without the help of neurologists. If so the VIPS device could have widespread clinical implications helping emergency personnel decide whether to take a patient to a comprehensive stroke center or a primary stroke center for treatment.    Turner likens the use of the VIPS device in detecting severe stroke to the use of electrocardiography ECG to definitively detect acute myocardial infarction. He predicts that the device has the potential to be used widely by emergency personnel but also to appear in other public spaces. This could potentially be something like a defibrillator said Turner. You can find out if a patient is having a stroke just like you can put a defibrillator on a patient to see if theyre having a heart attack.    This study was funded by Cerebrotech Medical Systems.    About MUSC Founded in  in Charleston The Medical University of South Carolina is the oldest medical school in the South. Today MUSC continues the tradition of excellence in education research and patient care. MUSC educates and trains more than  students and residents and has nearly  employees including approximately  faculty members. As the largest nonfederal employer in Charleston the university and its affiliates have collective annual budgets in excess of . billion. MUSC operates a bed medical center which includes a nationally recognized Childrens Hospital the Ashley River Tower cardiovascular digestive disease and surgical oncology Hollings Cancer Center a National Cancer Institute designated center Level I Trauma Center and Institute of Psychiatry. For more information on academic information or clinical services visit musc.edu. For more information on hospital patient services visit muschealth.org."