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Non-invasive non-contact coherent intraocular pressure and intracranial pressure measuring method and device thereof

A non-contact, measuring device technology, used in intracranial pressure measurement, tonometer, diagnostic recording/measurement, etc., can solve problems such as poor reliability and interference, and achieve convenient wearing, high measurement accuracy and simple structure Effect

Active Publication Date: 2020-03-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is: the present invention provides a non-invasive non-contact coherent intraocular pressure and intracranial pressure measurement method and device, which solves the problem of poor reliability and serious interference in the current measurement of intraocular pressure and intracranial pressure using infrared spectroscopy technical issues

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  • Non-invasive non-contact coherent intraocular pressure and intracranial pressure measuring method and device thereof
  • Non-invasive non-contact coherent intraocular pressure and intracranial pressure measuring method and device thereof

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Embodiment 1

[0041] A non-invasive and non-contact coherent intraocular pressure measurement device. As the aqueous humor flows back to the central retinal vein and vortex vein through the trabecular meshwork pathway and the membrane-sclera pathway, and finally flows back into the cavernous sinus located in the intracranial, the intraocular pressure in the aqueous humor There is a correlation with intracranial pressure; therefore, the present invention measures intraocular pressure based on human eye aqueous humor 17 .

[0042] Including laser emission module, beam splitter 16, photodetector 18, pulse wave measurement module 113 and microprocessor 112;

[0043]The laser emitting module includes a laser 12 for emitting laser and a laser controller 11 for controlling the laser 12, the laser controller 11 can control the laser 12 to emit laser that requires pulse width and phase characteristics, and the laser 12 The near-infrared laser 12 can be a continuous laser 12 or a pulsed laser 12, and...

Embodiment 2

[0051] Based on Embodiment 1, this embodiment provides a wearable non-invasive non-contact coherent intraocular pressure measurement device. The wearable device is glasses-type, that is, includes a frame, temples and nose pads. In this embodiment, the left eye is taken as an example, since the structures of the right eye and the left eye are mirror images, details are not described here.

[0052] The photodetector 18 of the left eye is arranged on the back of the left nose pad, that is, on the support frame of the left nose pad, the beam splitter 16 of the left eye is arranged in the middle of the left frame, and the position of the spectacle lens is replaced by an attenuator 15 and an absorbing film 14. Both the attenuator 15 and the absorbing film 14 are sheet-shaped, the beam splitter 16 is arranged on the attenuator 15, the laser 12 is arranged on the left side part of the attenuator 15, the photodetector 18, the beam splitter 16 and the laser 12 On the same optical face, ...

Embodiment 3

[0055] This embodiment provides a non-invasive and non-contact coherent intraocular pressure measurement method. The calculation formula of intraocular pressure is as follows:

[0056] P eo =P ei +ΔP=P ei +K×Δn×f(P bp ),

[0057] Among them, P ei Indicates the reference intraocular pressure, ΔP indicates the variation of intraocular pressure, K indicates the empirical value of intraocular pressure, Δn indicates the variation of the number of interference fringes, f(P bp ) represents the pulse wave fluctuation function.

[0058] This embodiment also provides a method for measuring non-invasive and non-contact coherent intracranial pressure. The formula for measuring intracranial pressure is: P ho =m×P eo ;

[0059] Among them, m represents the linear ratio of intracranial pressure to intraocular pressure, which is a constant, which is related to the test individual, and usually ranges from 0.7 to 1.2.

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Abstract

The invention discloses a noninvasive non-contact coherent intraocular pressure and intracranial pressure measuring method and a device thereof, which belong to the technical field of intraocular pressure and intracranial pressure detection. The device comprises a laser emission module, a beam splitter and a photoelectric detector, the laser emission module is used for emitting laser with specificcharacteristics, the laser is reflected by the beam splitter to form a path of laser to human eye aqueous humor, and the path of laser is transmitted to the photoelectric detector; the human eye aqueous humor reflects the received laser to the beam splitter, the beam splitter reflects one path of laser reflected by the human eye aqueous humor to the photoelectric detector, and the two paths of laser received by the photoelectric detector interfere with each other to form an interference pattern; the values of intraocular pressure and intracranial pressure are further calculated by utilizing the variation of the number of interference fringes measured by the device; the device can monitor intraocular pressure and intracranial pressure in real time, and is simple in structure and high in measurement precision.

Description

technical field [0001] The invention relates to the technical field of intraocular pressure and intracranial pressure detection, in particular to a method and device for measuring non-invasive and non-contact coherent intraocular pressure and intracranial pressure. Background technique [0002] Severe craniocerebral injury is a common neurological disease with the characteristics of emergency, high disability rate and fatality rate. Due to the abnormal increase of intracranial pressure caused by craniocerebral injury, the patient's condition continued to deteriorate and even died. In traditional methods, intracranial pressure monitoring mainly relies on observing the clinical manifestations of patients, as well as CT and MRI of the head. Continuous intracranial pressure (ICP) monitoring can detect changes in intracranial pressure in a timely and accurate manner and improve the success rate of patient treatment. [0003] The available monitoring sites for intracranial press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/16A61B5/03A61B5/02
CPCA61B3/165A61B5/02A61B5/031
Inventor 杨立峰王亚非陈雷霆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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