Patent ID: 6105582
Filing Date: 2000-08-22
Classification: A61B,A61M

Abstract:
A method of detecting and treating cerebral blood vessel collapse, which comprises the steps of:(a) changing pressure in a cerebral venous tract, and(b) detecting presence or absence of the vascular collapse by lowering pressure in the cerebral venous outflow tract and assessing intracranial pressure response so that if said response is registered as a comparable drop in intracranial pressure there is no venous collapse and if said response is not registered as a comparable drop in intracranial pressure the venous collapse is present, and(c) raising jugular vein bulb pressure to detect the point at which intracranial pressure begins to increase and measuring pressure gradient between intracranial cavity and jugular bulb at that point, and(d) lowering venous pressure up to the point at which intracranial pressure begins to drop and measuring pressure gradient between intracranial cavity and jugular bulb at that point, and(e) estimating a safe operating pressure gradient between intracranial cavity and jugular bulb as a gradient when small changes in jugular bulb pressure do not affect intracranial pressure,whereby presence of intracranial vascular collapse is detected and safe operating pressure gradient between intracranial cavity and jugular bulb is estimated which allows to control venous outflow pressure without affecting intracranial pressure thus enabling to restore cerebral blood flow through the collapsed vascular segments during intracranial pressure elevation.