Patents Assigned to National Aeronautics and Space Administration as represented by the Administrator (NASA)
  • Non-invasive method of determining absolute intracranial pressure
    Publication number: 20030191411
    Abstract: A method is presented for determining absolute intracranial pressure (ICP) in a patient. Skull expansion is monitored while changes in ICP are induced. The patient's blood pressure is measured when skull expansion is approximately zero. The measured blood pressure is indicative of a reference ICP value. Subsequently, the method causes a known change in ICP and measures the change in skull expansion associated therewith. The absolute ICP is a function of the reference ICP value, the known change in ICP and its associated change in skull expansion, and a measured change in skull expansion.
    Type: Application
    Filed: September 25, 2002
    Publication date: October 9, 2003
    Applicant: National Aeronautics and Space Administration as represented by the Administrator (NASA)
    Inventors: William T. Yost, John H. Cantrell, Alan R. Hargens
  • Non-invasive method of determining diastolic intracranial pressure
    Publication number: 20030191410
    Abstract: A method is presented for determining diastolic intracranial pressure (ICP) in a patient. A first change in the length of a path across the skull of the patient caused by a known change in ICP is measured and used to determine an elasticity constant for the patient. Next, a second change in the length of the path across the patient's skull occurring between systolic and diastolic portions of the patient's heartbeat is measured. The patient's diastolic ICP is a function of the elasticity constant and the second change.
    Type: Application
    Filed: September 25, 2002
    Publication date: October 9, 2003
    Applicant: National Aeronautics and Space Administration as represented by the Administrator (NASA)
    Inventors: William T. Yost, John H. Cantrell, Alan R. Hargens