Method of measuring intracranial pressure
First Claim
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1. A method of measuring intracranial pressure comprising the steps of:
- measuring arterial inflow, venous outflow and cranial spinal fluid flow;
calculating an intracranial volume change over a cardiac cycle from the measured arterial inflow, venous outflow and cranial spinal fluid flow;
calculating a pressure gradient over a cardiac cycle of spinal fluid flow from the measured cranial spinal fluid flow; and
calculating a pressure change per unit volume change based upon the calculated intracranial volume change and cranial pressure gradient.
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Abstract
A method and apparatus are provided for measuring intracranial pressure. The method includes the steps of measuring arterial inflow, venous outflow and cranial spinal fluid flow and calculating an intracranial volume change from the measured arterial inflow, venous outflow and cranial spinal fluid flow. The method also includes the steps of calculating a pressure gradient of spinal fluid flow from the measured cranial spinal fluid flow and calculating a pressure change per unit volume change based upon the calculated intracranial volume change and cranial pressure gradient.
68 Citations
24 Claims
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1. A method of measuring intracranial pressure comprising the steps of:
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measuring arterial inflow, venous outflow and cranial spinal fluid flow; calculating an intracranial volume change over a cardiac cycle from the measured arterial inflow, venous outflow and cranial spinal fluid flow; calculating a pressure gradient over a cardiac cycle of spinal fluid flow from the measured cranial spinal fluid flow; and calculating a pressure change per unit volume change based upon the calculated intracranial volume change and cranial pressure gradient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for measuring intracranial pressure comprising:
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means for measuring arterial inflow, venous outflow and cranial spinal fluid flow; means for calculating an intracranial volume change over a cardiac cycle from the measured arterial inflow, venous outflow and cranial spinal fluid flow; means for calculating a pressure gradient over a cardiac cycle of spinal fluid flow from the measured cranial spinal fluid flow; and means for calculating a pressure change per unit volume change based upon the calculated intracranial volume change and cranial pressure gradient. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification