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Intracranial pressure monitoring method based on magnetic induction phase difference change

A technology of intracranial pressure and phase difference, applied in the field of biomedicine, can solve the problem of inability to monitor intracranial pressure

Inactive Publication Date: 2015-04-22
ARMY MEDICAL UNIV
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  • Description
  • Claims
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Problems solved by technology

However, the current non-contact magnetic induction measurement method only measures the intracranial pressure once, and cannot monitor the intracranial pressure for a long time.

Method used

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  • Intracranial pressure monitoring method based on magnetic induction phase difference change
  • Intracranial pressure monitoring method based on magnetic induction phase difference change
  • Intracranial pressure monitoring method based on magnetic induction phase difference change

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Embodiment Construction

[0034] The method of measuring the phase difference by magnetic induction is based on the change of the overall average conductivity, which has good sensitivity to the change of the cranial content. According to the change of different cranial content, the magnetic induction phase difference (MIPS) also changes differently. The present invention proposes a method for detecting changes in intracranial pressure (ICP) based on changes in magnetic induction phase difference (MIPS). This method is to monitor changes in the overall average conductivity of the brain that lead to changes in phase difference and then monitor intracranial pressure (ICP) change detection method, image 3 Shown is a method system block diagram, comprising the following steps:

[0035] Step (1), place an excitation coil 5 around the tested brain 6, the diameter of the excitation coil 5 is 3-7cm, the excitation coil 5 is connected to the excitation source 8, the excitation source 8 adopts a common signal fu...

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Abstract

An intracranial pressure monitoring method based on magnetic induction phase difference change comprises the following steps of (1) arranging an exciting coil on the periphery of the brain and generating a drive signal with a frequency of 10MHz and power of 1w, wherein the drive signal transmits through the brain; (2) arranging a receiving coil on the periphery of the brain, wherein a superposition sensing signal of a signal of an induced magnetic field produced by the tested brain and a sensing signal of the exciting coil are picked up by the receiving coil; (3) conducting difference calculations on a phase of the drive signal and a phase of the superposition sensing signal of the receiving coil picked up in the step (2) through a computer to obtain a variable curve of magnetic sensing phase difference along with time; (4) obtaining a intracranial pressure value corresponding to a point on a changing curve of the magnetic sensing phase difference along with the time and a changing curve of intracranial pressure along with the time in step (2). By means of the monitoring method, the intracranial pressure can be monitored.

Description

technical field [0001] The invention belongs to the technical field of biomedicine, and in particular relates to an intracranial pressure monitoring method based on the change principle of the overall average magnetic induction phase difference of the brain. Background technique [0002] Intracranial pressure, that is, the pressure of cerebrospinal fluid in the cranial cavity, the pressure of cerebrospinal fluid in a normal adult is 0.78-1.76kpa (80-180 mm water column), and it fluctuates with breathing within 10 mm water column. The pressure of children is 0.4-1.0kpa (40-180 mm water column). 100 mm water column). The existing relatively mature intracranial pressure (ICP) measurement methods include CT or MRI imaging methods. Invasive ICP monitoring methods include lumbar puncture, intraventricular monitoring (currently the most commonly used method in clinical practice, and is the gold standard for ICP monitoring), intraparenchymal monitoring, subarachnoid monitoring, sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/03
Inventor 秦明新孙建金贵徐林宁旭许佳闫庆广陈明生
Owner ARMY MEDICAL UNIV
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