Intracranial pressure sensor, detection equipment and making method

Abstract

The invention provides an intracranial pressure sensor, which comprises a pressure-sensitive capacitor, a first electrode layer and a second electrode layer, a flexible covering layer, and a fixed inductor, wherein a capacitance value of the pressure-sensitive capacitor varies along with change in intracranial pressure; the pressure-sensitive capacitor comprises a pressure-sensitive layer, and a deformation amount of the pressure-sensitive layer varies along with the change in the intracranial pressure; the first electrode layer and the second electrode layer are formed at two sides of the pressure-sensitive layer, so that a capacitance structure is defined, and a distance between the first electrode layer and the second electrode layer varies along with change in the deformation amount ofthe pressure-sensitive layer; the flexible covering layer covers the outer sides of the pressure-sensitive layer, the first electrode layer and the second electrode layer and is attached between a skull and a dura mater; an LC oscillating circuit is defined by the fixed inductor and the pressure-sensitive capacitor; the fixed inductor is implanted into the skull and is used for converting a capacitance signal into a resonance frequency signal; and the fixed inductor is coupled to external detection equipment and is used for acquiring an intracranial pressure value. A sensor capacitance part which is implanted into the skull is made from a flexible material, so that minimal injury is caused to intracranial tissues, and a risk of such complications as intracranial hemorrhage and the like isreduced to the greatest extent; and the flexible material can get attached to the mater easily, so that more precise measurement is guaranteed.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to an intracranial pressure sensor, a detection device and a preparation method. Background technique [0002] Intracranial pressure is the pressure of brain tissue, cerebrospinal fluid, blood and other cranial cavity contents on the inner wall of the cranial cavity, which is of great significance in the clinical diagnosis of traumatic brain injury and neurology patients. Normal intracranial pressure ranges from 70 to 180 mm H 2 O. Clinically, intracranial pressure exceeds 180 mm H for more than 5 min 2 O is called increased intracranial pressure. Increased intracranial pressure can cause a series of pathological changes in neurology and neurosurgery. The initial manifestations are headache, nausea, vomiting, papilledema, etc.; severe intracranial pressure can also lead to hydrocephalus, brain tumor, meninges, etc. Inflammation and other complications, and even life-thr...

AI Technical Summary

Problems solved by technology

[0006] Based on the above problems, the present disclosure provides an intracranial pressure sensor, a detection device and a preparation method to alleviate the problem of existing implantable sensors, which are prone to intracranial hemorrhage due to the use of hard materials, and the measurement results are distorted to a certain extent. technical problem

Images