Inventors:
Keith Bridger - Washington DC
Arthur V. Cooke - Baltimore MD
Frank J. Crowne - Laurel MD
Philip M. Kuhn - Severna Park MD
Joseph J. Lutian - Arnold MD
Edward J. Passaro - Towson MD
John M. Sewell - Cockeysville MD
Assignee:
Active Signal Technologies, Inc. - Cockeysville MD
International Classification:
A61B 500
Abstract:
A non-invasive apparatus and method are disclosed for measuring intracranial pressure. The intracranial measurement system transmits acoustic signals through a cranium and provides an indication of intracranial pressure based on the received acoustic signals after interaction with the brain. Properties such as acoustic transmission impedance, resonant frequency, resonance characteristics, velocity of sound and the like may be measured and correlated with intracranial pressure. The acoustic signals have typical frequencies of less than 100 kHz, for example, in the audible and sub-audible frequency ranges. The intensity of the transmitted acoustic signals used to determine intracranial pressure is relatively low, resulting in little or no health risks during short term or long term monitoring.
