Intracranial pressure monitoring instrument based on ultrasonic wave acoustoelastic effect

Abstract

An intracranial pressure monitoring instrument based on ultrasonic wave acoustoelastic effect comprises a computer, an ultrasonic wave transmitting drive module, an ultrasonic wave transmitter, an ultrasonic wave receiver and a receiving signal circuit module, wherein the ultrasonic wave transmitting drive module is used for generating initial high-frequency signals, the ultrasonic wave transmitter is connected with the ultrasonic wave transmitting drive module and converts the initial high-frequency signals output by the ultrasonic wave transmitting drive module into elastic mechanical waves transmitting to a cranial cavity, the ultrasonic wave receiver is used for receiving the elastic mechanical waves penetrating the cranial cavity and converting the received elastic mechanical waves into tail-end high-frequency signals, the receiving signal circuit module is connected with the ultrasonic wave receiver and used for performing frequency discrimination and phase locking to the tail-end high-frequency signals and outputting the phase, with the same frequency as the initial high-frequency signals, of the tail-end high-frequency signals to the computer, and the computer is connected with the ultrasonic wave transmitting drive module and the receiving signal circuit module and used for demodulating the tail-end high-frequency signals and calculating intracranial pressure. By the intracranial pressure monitoring instrument, noninvasive monitoring of intracranial pressure of patients is achieved, measuring data is accurate, the clinical application requirements can be satisfied, and long-term online monitoring is achieved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an intracranial pressure monitor based on ultrasonic acoustoelastic effect. Background technique [0002] As a non-destructive monitoring method, ultrasonic technology is widely used in life medicine, food analysis, quality control, material science and geophysics. In the past, it was believed that the ultrasonic parameters were the inherent properties of the material and would not change with the change of the stress. However, since Hughes in 1953 used the ultrasonic method to measure the third-order elastic modulus of solids, he initially proposed the solid acoustic elastic theory and Tatsuo in 1968. Since the acoustoelastic birefringence effect, people began to think that ultrasonic parameters are related to the stress inside the material. The relationship between ultrasonic velocity, phase and other parameters and stress is called stress-acoustic effect o...

AI Technical Summary

Problems solved by technology

At present, many non-invasive monitoring methods have appeared, but all non-invasive monitoring methods cannot meet the requirements of accurate measurement and cannot be used clinically.

Moreover, many non-invasive monitoring methods cannot achieve online real-time and long-term monitoring, or require a special room for monitoring

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