CN219250177U - Cerebral blood oxygen noninvasive monitor with alarm function - Google Patents

Abstract

The utility model relates to a cerebral blood oxygen noninvasive monitor with an alarm function, which comprises an upper computer, a lower computer and a cerebral blood oxygen probe; generating PWM signals through the microcontroller, and controlling the light source driving circuit to control the four wavelengths of the LED chip to alternately emit light; the optical signals pass through the tissue of the forehead of the brain and are collected by the photoelectric detector after being absorbed, scattered and reflected, the current signals output by the photoelectric detector are converted into digital signals by the current-voltage conversion circuit and the signal processing circuit and enter the microcontroller, and the microcontroller sends the digital signals to the upper computer for processing and displaying through the serial port, so that the real-time, continuous and noninvasive monitoring of the blood oxygen saturation change condition of the brain tissue area is realized; simultaneously, in order to facilitate the use of medical staff, an alarm module is arranged, and when the blood oxygen saturation of brain tissue is outside a safety range, intelligent alarm is carried out, alarm audio is played through a loudspeaker, and the condition of a patient is informed to the medical staff through the flashing of an indicator lamp.

Description

Cerebral blood oxygen noninvasive monitor with alarm function

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a cerebral blood oxygen noninvasive monitor with an alarm function.

Background

The relative blood and oxygen content change parameters of human brain tissue have very important clinical effects, can evaluate the activity condition of brain functions, and the monitoring of the cerebral blood oxygen value has very important significance for monitoring the conditions of cerebral hemorrhage, cerebral hypoxia and the like of patients in the perioperative period, so that the method gradually becomes an important index in the clinical perioperative period; the cerebral blood oxygen monitor detects and reports cerebral blood oxygen saturation of the left and right cerebral tissues, and simultaneously outputs the blood volume and oxygen content parameter change curves of the two cerebral tissues for the computer to perform post-treatment, and the cerebral blood oxygen change amounts of the two cerebral tissues of the patient are evaluated by comparing the blood oxygen contents of the two cerebral tissues. At present, most domestic clinical methods for measuring the cerebral blood oxygen supply condition are invasive measurement or indirect measurement, wherein the invasive measurement not only causes physical trauma to a patient but also has the risk of hemorrhagic infection, but also can not feed back the change condition of the cerebral tissue blood oxygen saturation in time, and the two methods also have the condition of false negative or false positive of the detection result, so that the judgment of doctors on the current condition of the patient is seriously affected; in addition, the cerebral blood oxygen change amount is dynamically changed, and whether the cerebral blood oxygen value of a patient is normal or not can be known only by observing data or change curves at any time, so that the cerebral blood oxygen change amount is inconvenient to clinically use, and the workload of medical staff is increased, therefore, the cerebral blood oxygen noninvasive monitor with an alarm function needs to be provided, and timely alarm is needed when the cerebral blood oxygen value of the patient exceeds the upper limit or the lower limit.

Disclosure of Invention

In order to solve the problems, the utility model provides a cerebral blood oxygen noninvasive monitor with an alarm function.

A cerebral blood oxygen non-invasive monitor with an alarm function, comprising: the upper computer, the lower computer and the cerebral blood oxygen probe; the cerebral blood oxygen probe comprises four-wavelength LED chips and a photoelectric detector; the lower computer comprises a microcontroller, a light source driving circuit, a current-voltage conversion circuit and a signal processing circuit; the upper computer comprises an industrial personal computer which is electrically connected to the power module, the communication module, the data processing module, the waveform display screen, the data storage module and the alarm module; the alarm module comprises a loudspeaker and an indicator lamp; the cerebral blood oxygen probe is stuck to the forehead lobe of the human body and is respectively and electrically connected with the light source driving circuit and the current-voltage conversion circuit, and the current-voltage conversion circuit is electrically connected to the microcontroller through the signal processing circuit; the microcontroller is electrically connected with the industrial control computer through the communication module; the industrial personal computer and the power module are arranged in the shell, and the waveform display screen, the indicator light and the loudspeaker are all arranged on the shell.

Wherein, the cerebral blood oxygen probe also comprises a black sticky piece; the LED chip and the photoelectric detector are embedded in the black adhesive sheet.

The wavelengths of the LED chips are divided into 700nm, 760nm, 805nm and 850nm; the photodetector includes a first photodetector and a second photodetector; the LED chip is 20mm from the first photodetector and 40mm from the second photodetector.

Wherein, the power supply module is provided with a voltage stabilizing circuit; the power supply module is connected with the industrial personal computer through a USB (universal serial bus) line, the industrial personal computer provides power for the power supply module through a USB interface, and the power supply is converted into a power supply after being processed by the voltage stabilizing circuit and comprises +5V, -5V and 3.3V power supplies.

Wherein, the microcontroller adopts MSP430 series singlechip.

The shell is also provided with a power adapter connector, a USB connector, an aviation plug interface, a switch button, a heat radiation hole and a portable handle.

The signal processing circuit is composed of a direct current blocking circuit, a low-pass filter circuit, an amplifying circuit and a level lifting circuit.

The utility model has the following beneficial effects:

the utility model generates PWM signals through the microcontroller to control the light source driving circuit to control the four wavelengths of the LED chip to alternately emit light; the optical signals pass through the forehead tissue of the brain and are collected by the photoelectric detector after being absorbed, scattered and reflected, the current signals output by the photoelectric detector are converted into digital signals by the current-voltage conversion circuit and the signal processing circuit and enter the microcontroller, and the microcontroller sends the digital signals to the upper computer for processing and displaying through the serial port, so that the real-time, continuous and noninvasive monitoring of the blood oxygen saturation change condition of the brain tissue area is realized, secondary wounds are not caused to a patient, the risk of false negative or false positive caused by external interference is avoided, and the accuracy of measuring the blood oxygen saturation of the brain tissue is ensured; simultaneously, in order to facilitate the use of medical staff, an alarm module is arranged, and when the blood oxygen saturation of brain tissue is outside a safety range, intelligent alarm is carried out, alarm audio is played through a loudspeaker, and the condition of a patient is informed to the medical staff through the flashing of an indicator lamp.

Drawings

FIG. 1 is a schematic diagram of a cerebral blood oxygen noninvasive monitor with an alarm function;

FIG. 2 is a schematic diagram of a cerebral blood oxygen noninvasive monitor with an alarm function according to the present utility model;

fig. 3 is a schematic diagram of a lower computer according to the present utility model.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

As shown in fig. 1 to 3, a cerebral blood oxygen non-invasive monitor with an alarm function, comprising: the upper computer, the lower computer and the cerebral blood oxygen probe 1; the cerebral blood oxygen probe 1 comprises a four-wavelength LED chip 6 and a photoelectric detector; the lower computer comprises a microcontroller, a light source driving circuit, a current-voltage conversion circuit and a signal processing circuit; the upper computer comprises an industrial personal computer which is electrically connected to the power supply module, the communication module, the data processing module, the waveform display screen 5, the data storage module and the alarm module; the alarm module comprises a loudspeaker 2 and an indicator lamp 3; the cerebral blood oxygen probe 1 is stuck to the forehead lobe of the human body and is respectively and electrically connected with the light source driving circuit and the current-voltage conversion circuit, and the current-voltage conversion circuit is electrically connected to the microcontroller through the signal processing circuit; the microcontroller is electrically connected with the industrial control computer through the communication module; the industrial personal computer and the power supply module are arranged in the shell 4, and the waveform display screen 5, the indicator lamp 3 and the loudspeaker 2 are arranged on the shell 4. The utility model generates PWM signals through the microcontroller to control the light source driving circuit to control the alternate light of four wavelengths of the LED chip 6; the optical signals pass through the forehead tissue of the brain and are collected by the photoelectric detector after being absorbed, scattered and reflected, the current signals output by the photoelectric detector are converted into digital signals by the current-voltage conversion circuit and the signal processing circuit and enter the microcontroller, and the microcontroller sends the digital signals to the upper computer for processing and displaying through the serial port, so that the real-time, continuous and noninvasive monitoring of the blood oxygen saturation change condition of the brain tissue area is realized, secondary wounds are not caused to a patient, the risk of false negative or false positive caused by external interference is avoided, and the accuracy of measuring the blood oxygen saturation of the brain tissue is ensured; simultaneously, in order to facilitate the use of medical staff, an alarm module is arranged, and when the blood oxygen saturation of brain tissue is outside a safety range, intelligent alarm is carried out, alarm audio is played through the loudspeaker 2, and the condition of a patient is informed to the medical staff through the flashing of the indicator lamp 3.

Wherein, the cerebral blood oxygen probe 1 also comprises a black adhesive sheet; the LED chip 6 and the photodetector are embedded in the black adhesive sheet. The black adhesive sheet has good biocompatibility, the influence of ambient light on cerebral blood oxygen monitoring can be reduced, the viscosity can facilitate the fixation of the cerebral blood oxygen probe 1, the wearing comfort of a patient is ensured, and the skin is prevented from being scratched.

Wherein, the wavelength of the LED chip 6 is divided into 700nm, 760nm, 805nm and 850nm; the photodetectors comprise a first photodetector 7 and a second photodetector 8; the LED chip 6 is 720mm from the first photodetector and 840mm from the second photodetector. The first photodetector 7 detects the detection light passing through the scalp and the skull, the second photodetector 8 detects the detection light penetrating through the scalp, the skull, the subarachnoid space to the grey matter of the brain, so as to obtain the superficial layer information and the deep layer information of the brain tissue, and the local cerebral blood oxygen concentration information with higher purity is obtained through differential processing.

Wherein, the power supply module is provided with a voltage stabilizing circuit; the power supply module is connected with the industrial personal computer through a USB (universal serial bus) line, the industrial personal computer provides power for the power supply module through a USB interface, and the power supply is converted into a power supply after being processed by the voltage stabilizing circuit and comprises +5V, -5V and 3.3V power supplies; the 3.3V power supply is the working power supply of the microcontroller, the +5V power supply and the-5V power supply are the working power supplies of the operational amplifier, the modules of the lower computer are ensured to obtain the required voltage and current, and the stability of the instrument is improved.

The microcontroller adopts an MSP430 series singlechip, in particular an MSP430F5529 singlechip, outputs PWM waves through an I/O port to control a light source driving module, and acquires cerebral blood oxygen signals of four channels through a built-in 12-bit ADC module; setting of PWM wave output frequency and duty ratio is realized through a timer; and the data transmission and instruction control of the lower computer and the upper computer are realized through a UART communication mode.

Wherein, the shell 4 is also provided with a power adapter connector 9, a USB connector 10, an aviation plug interface 11, a switch button 12, a radiating hole and a portable handle 13; the power adapter connector 9 is connected with the mains supply, the USB connector 10 is connected with the parts such as a mouse, a keyboard and the like, and the aviation plug interface 11 is connected with the cerebral blood oxygen probe 1.

The signal processing circuit is composed of a direct current blocking circuit, a low-pass filter circuit, an amplifying circuit and a level lifting circuit.

The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (7)

1. A cerebral blood oxygen noninvasive monitor with an alarm function, which is characterized by comprising:

the upper computer, the lower computer and the cerebral blood oxygen probe;

the cerebral blood oxygen probe comprises four-wavelength LED chips and a photoelectric detector;

the lower computer comprises a microcontroller, a light source driving circuit, a current-voltage conversion circuit and a signal processing circuit;

the upper computer comprises an industrial personal computer which is electrically connected to the power module, the communication module, the data processing module, the waveform display screen, the data storage module and the alarm module;

the alarm module comprises a loudspeaker and an indicator lamp;

the cerebral blood oxygen probe is stuck to the forehead lobe of the human body and is respectively and electrically connected with the light source driving circuit and the current-voltage conversion circuit, and the current-voltage conversion circuit is electrically connected to the microcontroller through the signal processing circuit;

the microcontroller is electrically connected with the industrial control computer through the communication module;

the industrial personal computer and the power module are arranged in the shell, and the waveform display screen, the indicator light and the loudspeaker are all arranged on the shell.

2. The cerebral blood oxygen non-invasive monitor with alarm function according to claim 1, characterized in that,

the cerebral blood oxygen probe also comprises a black sticky piece;

the LED chip and the photoelectric detector are embedded in the black adhesive sheet.

3. The cerebral blood oxygen non-invasive monitor with alarm function according to claim 1, characterized in that,

the wavelengths of the LED chips are divided into 700nm, 760nm, 805nm and 850nm;

the photodetector includes a first photodetector and a second photodetector;

the LED chip is 20mm from the first photodetector and 40mm from the second photodetector.

4. The cerebral blood oxygen non-invasive monitor with alarm function according to claim 1, characterized in that,

the power supply module is provided with a voltage stabilizing circuit;

the power supply module is connected with the industrial personal computer through a USB (universal serial bus) line, the industrial personal computer provides power for the power supply module through a USB interface, and the power supply is converted into a power supply after being processed by the voltage stabilizing circuit and comprises +5V, -5V and 3.3V power supplies.

5. The cerebral blood oxygen non-invasive monitor with alarm function according to claim 1, characterized in that,

the microcontroller adopts MSP430 series single-chip microcomputer.

6. The cerebral blood oxygen non-invasive monitor with alarm function according to claim 1, characterized in that,

the shell is also provided with a power adapter connector, a USB connector, an aviation plug interface, a switch button, a heat radiation hole and a portable handle.

7. The cerebral blood oxygen non-invasive monitor with alarm function according to claim 1, characterized in that,

the signal processing circuit is composed of a direct current blocking circuit, a low-pass filter circuit, an amplifying circuit and a level lifting circuit.

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