SYSTEMS AND METHODS FOR DETECTION OF CHANGES IN BLOOD FLOW INDICATIVE OF STROKE AND OTHER CONDITIONS

摘要

The present invention relates to systems, articles, and methods for determining whether injury has occurred to a subject, such as to a subject's head. In one embodiment, acoustic signals from various regions of a subject's body (e.g., various regions of the head) are determined and compared. In some cases, the acoustic signals may be compared to determine whether an injury has occurred, for instance, a traumatic brain injury or stroke. The acoustic signals may comprise one or more vibrations, and in some cases, the vibrations that are determined occur at frequencies between about 20 Hz and about 20 kHz, and in certain cases, at frequencies less than 20 Hz. In some embodiments, a plurality of sensors which can determine acoustic signals are employed, for example, attached to a helmet, a strap, or the like. Additionally, in some embodiments, light is directed at a region of a subject (such as the head), and light reflected from the region is determined to determine the acoustic signals that occurs in the region.