Study to Test Sensitivity and Specificity of Passive Wave Pressure Device in Determining Ischemic Stroke


Phase 2 Results

Trial Description

That the Jan Medical Nautilus NeuroWaveTM system provides significantly higher sensitivity to hyper acute ischemic stroke than does CT.

Detailed Description

In spite of the fact that approximately 800,000 strokes are diagnosed in the United States each year, many physicians and patients have approached the management of stroke with a sense of futility. However, within the past 2 decades, following the advent of computerized tomography (CT), medical interest has turned toward stroke and effective interventions to treat and prevent it have received attention.
CT and/or magnetic resonance imaging (MRI) are the typical diagnostic tools used in the event of a stroke alert. These studies are done on an emergent or urgent basis, since, to be effective, treatments for ischemic and hemorrhagic stroke must be delivered soon after onset of the illness. In an effort to institute an appropriate therapeutic regime, laboratory and structural diagnostic studies are required to be done as rapidly as possible to determine pathological etiology, size, and location of concern.
The speed at which a diagnosis is made and a treatment plan established often determines patient outcome and any associated complications. This is especially true when evaluating patients for ischemic stroke where there is a narrow 3 hour window of opportunity in which to resolve the clot with IV .before permanent neurological impairment results, and up to 8 additional hours with the use if intra arterial (IA) t-PA or interventional mechanical embolectomy procedures are utilized. Current treatment modalities include pharmacologic thrombolytic drugs utilized to disrupt or dissolve clots located in the distal vasculature or mechanical intervention in larger vessels. Since many patients do not recognize the symptoms of stroke they do not seek medical attention immediately. Significant time is then often lost from the onset of the stroke before seeking medical help / treatment.
Although the current technologies are quite adequate as diagnostic tools for hemorrhagic stroke and for identifying subdural hematomas, and other pooled blood abnormalities which would preclude t-PA therapy, they are largely ineffective at positively identifying stroke during the limited therapeutic window of time. Positive identification of ischemia itself is rarely possible or practical with CT or within the limited therapeutic window. As such the diagnostic determination and associated treatment decisions are based on the unsatisfactory basis of exclusion.

Trial Stopped: Insufficient Subject Recruitment



  • Nautilus NeuroWaveTM System Device
    Intervention Desc: Non-invasive device designed to detect pressure signals from the skull to aid in the diagnosis of ischemic stroke.
    ARM 1: Kind: Experimental
    Label: Neuro Wave Recording Arm
    ARM 2: Kind: Experimental
    Label: Nautilus NeuroWave Recording Arm
    Description: Nautilus NeuroWaveTM System

Trial Design

  • Masking: Open Label
  • Purpose: Diagnostic
  • Endpoint: Safety/Efficacy Study
  • Intervention: Single Group Assignment


Type Measure Time Frame Safety Issue
Primary sensitivity, specificity and predictive values of the Jan Medical DC1 System in detecting ischemia within 12 hours of known stroke onset in comparison to follow up CT and MRI. At study completion- approximately 8 months No
Secondary Determine the location to left, right, deep, and/or back of the cranium At study completion- approximately 8 months No
Secondary Incidence of device related adverse events At study completion- approximately 8 months Yes
Secondary Nautilus NeuroWaveTM recording in MRI Normal population (no cerebrovascular disease per MRI) At study completion- approximately 8 months No