CN214157317U - Brain tissue blood oxygen monitoring device - Google Patents
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- CN214157317U CN214157317U CN202022792818.5U CN202022792818U CN214157317U CN 214157317 U CN214157317 U CN 214157317U CN 202022792818 U CN202022792818 U CN 202022792818U CN 214157317 U CN214157317 U CN 214157317U
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Abstract
The brain tissue blood oxygen monitoring device comprises a monitoring main unit and a frontal plane sensor unit; the frontal sensor unit comprises a brain tissue blood oxygen probe with the number 1; the brain tissue blood oxygen probe comprises a light source subunit and a light detection subunit; the light source subunit comprises a light source with the number D1 and a light source with the number D2; the light detection sub-unit is in electric signal connection with the monitoring main unit and comprises a photosensitive diode numbered J2, a photosensitive diode numbered J1 and a photosensitive diode numbered J3; the distance between the serial number J2 photodiode and the light source is L1; the distance between the serial number J1 photodiode and the light source is L2; the distance between the serial number J3 photodiode and the light source is L3; l1 is less than L2, L2 is less than L3; the light source emits red light signals and/or infrared light signals of different wave bands in a time-sharing mode, the light signals are emitted to different depths of head tissues of a tester, the head tissues reflect the light signals to form reflection signals, and the light detection subunit detects the intensity of the reflection signals on the photosensitive diode.
Description
Technical Field
The invention relates to the technical field of bioelectronics, in particular to a brain tissue blood oxygen monitoring device.
Background
The commonly used cerebral oxygen function monitoring index parameter technology comprises the oxygen saturation of the jugular part, the oxygen partial pressure of the brain tissue, the radiation imaging technology and the like.
The technique for monitoring the blood oxygen saturation of the jugular bulb part comprises the following steps: jugular ball oxygen saturation SJVO2Monitoring by means of an imaging device, a reverse catheter is placed in the internal jugular vein, blood in the jugular bulb is extracted, and oxygen saturation of the jugular bulb is calculated. SJVO2Normal range is about 55% -77%, SJVO at a certain time of hemoglobin and arterial oxygen saturation2<50% indicates brain hypoxia, and SJVO2>75% suggests a relative excess of oxygen supply to the brain. Reflecting the matching problem of oxygenation and oxygen supply in perfusion of cerebral reflux, the index is traumatic to patients and needs repeated calibration and still cannot accurately express the cerebral oxygen metabolism index.
The brain tissue oxygen partial pressure monitoring technology comprises the following steps: brain tissue partial oxygen pressure monitoring (PbrO)2) The Clark probe was placed into brain tissue by cranial drilling, or placed on the healthy side during a craniotomy. The Clark probe generates reversible electrochemical reaction with oxygen molecules in the tissue, and the brain oxygen is monitored by measuring the intensity change of current. PbrO2The monitoring only needs one time of zero calibration and sensitivity calibration before measurement, and the zero drift is very small in the process, so that the method has higher accuracy and anti-interference performance. But PbrO2Reflecting the oxygen consumption of local brain tissue, and different parts of the brain tissue PbrO2The difference is not clear, and other physiological information needs to be combined to judge the brain function.
The radiation imaging technology comprises the following steps: the traditional radioactive brain hemodynamics evaluation method comprises DSA angiography, single photon emission computed tomography, CT angiography or CT perfusion imaging and the like. These methods are not only radioactive, but in part require the injection of contrast agents and are invasive.
The traditional brain blood oxygen monitoring device based on the near infrared spectrum technology is designed by complex filtering amplification collection so as to meet the signal requirement, so that the hardware circuit is large in size and high in overall power consumption, and is not convenient to carry, popularize and apply. The traditional brain blood oxygen probe is based on the fixed design of a helmet model, and the layout of detection channels is limited.
Disclosure of Invention
The invention provides a brain tissue blood oxygen monitoring device for solving the technical problem.
A brain tissue blood oxygen monitoring device comprises a monitoring main unit and a frontal sensor unit; the frontal sensor unit comprises a brain tissue blood oxygen probe with the number 1; the brain tissue blood oxygen probe comprises a light source subunit and a light detection subunit; the light source subunit is in electric signal connection with the monitoring main unit and comprises a light source with the number D1 and a light source with the number D2; the light source with the number D1 is arranged close to the light source with the number D2; the light detection sub-unit is in electric signal connection with the monitoring main unit and comprises a photosensitive diode numbered J2, a photosensitive diode numbered J1 and a photosensitive diode numbered J3; the distance between the photodiode numbered J2 and the light source numbered D1 and the light source numbered D2 is L1; the distance between the photodiode numbered J1 and the light source numbered D1 and the light source numbered D2 is L2; the distance between the photodiode numbered J3 and the light source numbered D1 and the light source numbered D2 is L3; the L1 is less than L2, L2 is less than L3; the monitoring main unit controls the light source with the number D1 and the light source with the number D2 to emit red light signals and/or infrared light signals with different wave bands in a time-sharing mode, the light signals are emitted to different depths of head tissues of a tester, reflected light signals of the head tissues form reflection signals, the light detection sub unit detects the intensity of the reflection signals on the photosensitive diode with the number J1, the photosensitive diode with the number J3 and the photosensitive diode with the number J6, and the intensity of the reflection signals carries absorption information of the light signals of the tissues with the different depths.
The brain tissue blood oxygen monitoring device further comprises: the device comprises a main control MCU unit, a power supply module, a communication module, a signal amplification and filtering module and a digital acquisition and amplification module; the light source with the number D1 is an infrared light source with the number D1, the wavelength of the infrared light source with the number D1 is 730nm or 760nm, the light source with the number D2 is an infrared light source with the number D2, and the wavelength of the infrared light source with the number D2 is 850nm or 940 nm; the main control MCU unit is in electric signal connection with the forehead sensor unit and outputs control signals to the light source with the number D1 and the light source with the number D2; the photosensitive diode of the frontal sensor unit is in electric signal connection with the signal amplification and filtering module; the digital acquisition amplification module is in electric signal connection with the signal amplification filtering module; the emitted signals of the light source with the number D1 and the light source with the number D2 are absorbed and reflected by brain tissues, the reflected signals received by the photosensitive diode are output to the signal amplification and filtering module for amplification and filtering, and the processed signals are output to the digital acquisition and amplification module; the main control MCU unit, the power module, the communication module and the monitoring main unit are integrated; the digital acquisition amplification module and the signal amplification filtering module are integrated on the forehead sensor unit; or the digital acquisition amplifying module and the signal amplification filtering module are integrated in the monitoring main unit.
L1 is larger than 0 cm and smaller than 1cm, and the light signal received by the serial number J2 photosensitive diode carries the absorption information of scalp and skull tissues to the infrared light signal; the L2 is larger than 2cm and smaller than 3cm, and the light signals received by the serial number J1 photosensitive diode carry absorption information of cerebrospinal fluid and cerebral gray matter tissues to infrared light signals; the L3 is larger than 3cm, and the light signals received by the serial number J3 photosensitive diode carry the absorption information of the brain gray matter tissue and the brain white matter tissue to the infrared light signals. The light detection subunit further comprises a photosensitive diode numbered J6, a photosensitive diode numbered J7 and a photosensitive diode numbered J5; the distance between the light source with the serial number J6 and the light source with the serial number D1 and the light source with the serial number D2 is L2, and the distance between the light source with the serial number J7 and the light source with the serial number D1 and the light source with the serial number D2 is L3; the distance between the photodiode numbered J5 and the light source numbered D1 and the light source numbered D2 is L3.
The photosensitive diode numbered J1 is electrically connected in parallel with the photosensitive diode numbered J2; or the number J1 photodiode is electrically connected in parallel with the number J6 photodiode; or the number J2 photodiode is electrically connected in parallel with the number J6 photodiode; or the photosensitive diode numbered J1, the photosensitive diode numbered J2 and the photosensitive diode numbered J6 are connected in parallel by electric signals; or the photosensitive diode numbered J3 and the photosensitive diode numbered J7 are connected in parallel electrically; or the photosensitive diode numbered J5 and the photosensitive diode numbered J7 are connected in parallel electrically; or the photosensitive diode numbered J3 and the photosensitive diode numbered J5 are connected in parallel electrically; or the photosensitive diode numbered J3, the photosensitive diode numbered J7 and the photosensitive diode numbered J5 are connected in parallel by electric signals; the positive electrodes of the parallel photodiodes are connected with each other through an electric signal, and the negative electrodes of the parallel photodiodes are connected with each other through an electric signal.
The number J1 and the number J2 of the photosensitive diodes are connected in parallel to form a first path of detection unit, and the number J3 and the number J7 of the photosensitive diodes are connected in parallel to form a second path of detection unit; or the serial number J1 and the serial number J6 of the photosensitive diode are connected in parallel to form a first path of detection unit, and the serial number J5 and the serial number J7 of the photosensitive diode are connected in parallel to form a second path of detection unit; or the serial number J2 and the serial number J6 of the photosensitive diode are connected in parallel to form a first path of detection unit, and the serial number J3 and the serial number J5 of the photosensitive diode are connected in parallel to form a second path of detection unit; or the photodiodes with the numbers J1, J2 and J6 are connected in parallel to form a first path of detection unit, and the photodiodes with the numbers J3, J7 and J5 are connected in parallel to form a second path of detection unit.
The photosensitive diode numbered J1 and the photosensitive diode numbered J6 are integrally packaged photosensitive diodes, and two photosensitive diodes are integrated in one package.
The photosensitive diode numbered J3, the photosensitive diode numbered J7 and the photosensitive diode J5 are integrally packaged, and three photosensitive diodes are integrated in one package.
Brain tissue blood oxygen probe includes rectangular flexible PCB, and serial number D1 light source, serial number D2 light source are placed in flexible PCB's one end, and signal connector is placed to flexible PCB's the other end, and photodiode is placed in one side of serial number D1 light source, serial number D2 light source from far away to near, monitoring main unit passes through signal connector and brain tissue blood oxygen probe electric signal connection.
The frontal sensor unit also comprises a brain tissue blood oxygen probe with the number 2; the brain tissue blood oxygen probe with the number 1 can be set as a left half brain tissue blood oxygen probe, and the brain tissue blood oxygen probe with the number 2 can be set as a right half brain tissue blood oxygen probe.
Compared with the prior art, the invention has the beneficial effects that: the number of the photosensitive devices is increased, the detection sensitivity of the light detection subunit is increased, and the distances between the photosensitive diodes and the light sources are different, so that the light intensity reflected by tissues at different depths can be detected; the photosensitive diode close to the data acquisition point amplifies and acquires the weak signal, so that the loss of the transmission of the weak signal on a data line is reduced; if the digital acquisition amplification module and the signal amplification filtering module are integrated in the monitoring main unit, the volume and the equipment cost of the frontal sensor unit can be reduced; the number of the photodiodes is increased, so that the number of the photodiodes away from the position is increased, and the detection sensitivity of the position is improved; the parallel photodiode is used as a signal to be input to the signal amplification and filtering module, and different combinations of distances can be used for detecting different brain tissues; different photodiodes are programmed into different detection units, so that signals of multiple paths of different tissues can be detected, and the blood oxygen change of different brain tissues can be detected; different parallel modes can form forehead sensor units with different specifications; a plurality of photodiodes are integrated, and the integrated chip has small volume and is convenient to produce and install; the flexible PCB can be bent, so that the flexible PCB can be closely attached to the head; by connecting the two brain tissue blood oxygen probes, the blood oxygen change of the left and right brain tissues can be measured.
Drawings
FIG. 1 is a graph of the absorption spectrum of human tissue;
FIG. 2 is a block diagram of a preferred embodiment of a brain tissue blood oxygen monitoring device;
FIG. 3 is a block diagram of a preferred embodiment of a brain tissue blood oxygen monitoring device;
FIG. 4 is a block diagram of a preferred embodiment of a brain tissue blood oxygen monitoring device;
FIG. 5 is a schematic diagram of the depth of detection of a brain tissue oximetry probe;
FIG. 6 is a block diagram of a preferred embodiment of a brain tissue blood oxygen monitoring device;
FIG. 7 is a block diagram of a preferred embodiment of a forehead sensor unit;
FIG. 8 is a block diagram of a preferred embodiment of a parallel connection of photodiodes;
FIG. 9 is a block diagram of a preferred embodiment of a parallel connection of photodiodes;
fig. 10 is a block diagram of a preferred embodiment of a forehead sensor unit.
Detailed Description
The present invention will be described in more detail with reference to the accompanying drawings.
Referring to fig. 3 and 7, a brain tissue blood oxygen monitoring device includes a monitoring main unit and a frontal sensor unit; the frontal sensor unit comprises a brain tissue blood oxygen probe with the number 1; the brain tissue blood oxygen probe comprises a light source subunit and a light detection subunit; the light source subunit is in electric signal connection with the monitoring main unit and comprises a light source with the number D1 and a light source with the number D2; the light source with the number D1 is arranged close to the light source with the number D2; the light detection sub-unit is in electric signal connection with the monitoring main unit and comprises a photosensitive diode numbered J2, a photosensitive diode numbered J1 and a photosensitive diode numbered J3; the distance between the photodiode numbered J2 and the light source numbered D1 and the light source numbered D2 is L1; the distance between the photodiode numbered J1 and the light source numbered D1 and the light source numbered D2 is L2; the distance between the photodiode numbered J3 and the light source numbered D1 and the light source numbered D2 is L3; the L1 is less than L2, L2 is less than L3; the monitoring main unit controls the light source with the number D1 and the light source with the number D2 to emit red light signals and/or infrared light signals with different wave bands in a time-sharing mode, the light signals are emitted to different depths of head tissues of a tester, reflected light signals of the head tissues form reflection signals, the light detection sub unit detects the intensity of the reflection signals on the photosensitive diode with the number J1, the photosensitive diode with the number J3 and the photosensitive diode with the number J6, and the intensity of the reflection signals carries absorption information of the light signals of the tissues with the different depths.
As shown in fig. 5, the number of the photosensitive devices is increased, so that the detection sensitivity of the light detection subunit can be increased, the distances between the photodiodes and the light source are different, and the light intensity reflected by tissues at different depths can be detected, as shown in the figure, when the distance between the photodiodes and the light source is 1cm (centimeter), the light intensity reflected by the scalp and the skull in the reflected light is the maximum, and the whole light intensity is the maximum; when the distance between the photosensitive diode and the light source is 2cm, the light intensity of reflection of cerebrospinal fluid and gray matter in the reflected light is the largest, and the whole light intensity is relatively weak; when the distance between the photosensitive diode and the light source is 3cm, the light intensity of grey matter and white matter reflection in the reflected light is the largest, and the whole light intensity is the weakest.
By combining the detection results of the photodiodes with different distances, the blood oxygen content of the brain can be effectively obtained.
As shown in fig. 3 and 4, the method further includes: the device comprises a main control MCU unit, a power supply module, a communication module, a signal amplification and filtering module and a digital acquisition and amplification module; the main control MCU unit is in electric signal connection with the forehead sensor unit and outputs control signals to the light source with the number D1 and the light source with the number D2; the photosensitive diode of the frontal sensor unit is in electric signal connection with the signal amplification and filtering module; the digital acquisition amplification module is in electric signal connection with the signal amplification filtering module; the light source transmits signals which are absorbed and reflected by brain tissues, the photosensitive diode receives the reflected signals and outputs the reflected signals to the signal amplification and filtering module for amplification and filtering processing, and the processed signals are output to the digital acquisition and amplification module; the main control MCU unit, the power module, the communication module and the monitoring main unit are integrated; as shown in fig. 4, the digital acquisition amplification module and the signal amplification filtering module are integrated in the forehead sensor unit; or as shown in fig. 5, a digital acquisition amplifying module and a signal amplifying and filtering module are integrated in the monitoring main unit.
The digital acquisition amplification module and the signal amplification filtering module are integrated on the forehead sensor unit, so that weak signals can be amplified and acquired by a photodiode close to a data acquisition point, and the loss of the weak signals transmitted on a data line is reduced.
If the digital acquisition amplification module and the signal amplification filtering module are integrated in the monitoring main unit, the volume and the equipment cost of the frontal surface sensor unit can be reduced, and the frontal surface sensor unit can be used as a consumable material to realize one-time use.
The display unit can be a self-contained display of the equipment or an external display.
As shown in fig. 5, the L1 is greater than 0 cm and less than 1cm and mainly carries information about absorption of infrared light signals by scalp and skull tissues; the L2 is larger than 2cm and smaller than 3cm and mainly carries absorption information of the cerebrospinal fluid and the gray brain tissue to infrared light signals; the L3 is larger than 3cm and mainly carries the absorption information of the brain gray matter tissue and the brain white matter tissue to the infrared light signal.
The specific values of L1, L2 and L3 are based on the extensive measurements made by the inventors of the known devices, and different values are possible with different devices.
As shown in fig. 7, the photodetector sub-unit further includes a number J6 photodiode, a number J7 photodiode, a number J5 photodiode; the distance between the light source with the serial number J6 and the light source with the serial number D1 and the light source with the serial number D2 is L2, and the distance between the light source with the serial number J7 and the light source with the serial number D1 and the light source with the serial number D2 is L3; the distance between the photodiode numbered J5 and the light source numbered D1 and the light source numbered D2 is L3.
The distance between the light sensitive diodes is increased near the distances L2 and L3, the number of the light sensitive diodes is increased, the detection sensitivity of the distance is improved, the distance L3 is the farthest, weak deep tissue reflection is received, the light sensitive diodes are increased, and a better detection effect can be obtained. As in fig. 8, the photodiode numbered J1 is electrically connected in parallel with the photodiode numbered J2; or the number J1 photodiode is electrically connected in parallel with the number J6 photodiode; or the number J2 photodiode is electrically connected in parallel with the number J6 photodiode; or the photosensitive diode numbered J1, the photosensitive diode numbered J2 and the photosensitive diode numbered J6 are connected in parallel by electric signals; or the photosensitive diode numbered J3 and the photosensitive diode numbered J7 are connected in parallel electrically; or the photosensitive diode numbered J5 and the photosensitive diode numbered J7 are connected in parallel electrically; or the photosensitive diode numbered J3 and the photosensitive diode numbered J5 are connected in parallel electrically; or the photosensitive diode numbered J3, the photosensitive diode numbered J7 and the photosensitive diode numbered J5 are connected in parallel by electric signals; the positive electrodes of the parallel photodiodes are connected with each other through an electric signal, and the negative electrodes of the parallel photodiodes are connected with each other through an electric signal.
The photodiodes with different distances are arranged in parallel, the photodiodes after parallel connection are used as a signal to be input into the signal amplification and filtering module, and different brain tissues can be detected by the combination of different distances.
As shown in fig. 8 and 9; the number J1 and the number J2 of the photosensitive diodes are connected in parallel to form a first path of detection unit, and the number J3 and the number J7 of the photosensitive diodes are connected in parallel to form a second path of detection unit; or the serial number J1 and the serial number J6 of the photosensitive diode are connected in parallel to form a first path of detection unit, and the serial number J5 and the serial number J7 of the photosensitive diode are connected in parallel to form a second path of detection unit; or the serial number J2 and the serial number J6 of the photosensitive diode are connected in parallel to form a first path of detection unit, and the serial number J3 and the serial number J5 of the photosensitive diode are connected in parallel to form a second path of detection unit; or the photodiodes with the numbers J1, J2 and J6 are connected in parallel to form a first path of detection unit, and the photodiodes with the numbers J3, J7 and J5 are connected in parallel to form a second path of detection unit.
Different photodiodes are programmed into different detection units, so that signals of multiple paths of different tissues can be detected, and the blood oxygen change of different brain tissues can be detected.
Different parallel modes can form forehead sensor units with different specifications.
The photosensitive diode numbered J1 and the photosensitive diode numbered J6 are integrally packaged photosensitive diodes, and two photosensitive diodes are integrated in one package.
The photosensitive diode numbered J3, the photosensitive diode numbered J7 and the photosensitive diode J5 are integrally packaged, and three photosensitive diodes are integrated in one package.
Modern integrated chip technology can integrate a plurality of photosensitive diodes in one package, and the integrated chip is small in size and convenient to produce and mount.
Referring to fig. 7 and 10, the brain tissue blood oxygen probe comprises a rectangular flexible PCB, a light source numbered D1 and a light source numbered D2 are disposed at one end of the flexible PCB, a signal connector is disposed at the other end of the flexible PCB, a photodiode is disposed at one side of the light source numbered D1 and the light source numbered D2 from far to near, and the monitoring main unit is electrically connected with the brain tissue blood oxygen probe through the signal connector.
The flexible PCB is capable of flexing to facilitate intimate contact with the head.
As shown in fig. 6, the frontal plane sensor unit further includes a number 2 brain tissue blood oxygen probe; the brain tissue blood oxygen probe with the number 1 can be set as a left half brain tissue blood oxygen probe, and the brain tissue blood oxygen probe with the number 2 can be set as a right half brain tissue blood oxygen probe.
Partial measurement, the blood oxygen change of brain tissue about need monitoring, through connecting two brain tissue blood oxygen probes, can measure the blood oxygen change of brain tissue about, it is good with brain tissue blood oxygen probe installation in the head both sides in the practicality.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the contents of the specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A brain tissue blood oxygen monitoring device is characterized by comprising a monitoring main unit and a frontal sensor unit; the frontal sensor unit comprises a brain tissue blood oxygen probe with the number 1;
the brain tissue blood oxygen probe comprises a light source subunit and a light detection subunit;
the light source subunit is in electric signal connection with the monitoring main unit and comprises a light source with the number D1 and a light source with the number D2; the light source with the number D1 is arranged close to the light source with the number D2;
the light detection sub-unit is in electric signal connection with the monitoring main unit and comprises a photosensitive diode numbered J2, a photosensitive diode numbered J1 and a photosensitive diode numbered J3;
the distance between the photosensitive diode with the number J2 and the light source with the number D1 and the light source with the number D2 is L1;
the distance between the photosensitive diode with the number J1 and the light source with the number D1 and the light source with the number D2 is L2;
the distance between the photosensitive diode with the number J3 and the light source with the number D1 and the light source with the number D2 is L3;
the L1 is less than L2, L2 is less than L3;
the monitoring main unit controls the light source with the number D1 and the light source with the number D2 to emit red light signals and/or infrared light signals with different wave bands in a time-sharing manner, the light signals are emitted to different depths of head tissues of a tester, reflected light signals of the head tissues form reflection signals, and the light detection sub unit detects the intensity of the reflection signals on the photosensitive diode with the number J1, the photosensitive diode with the number J3 and the photosensitive diode with the number J6, wherein the intensity of the reflection signals carries absorption information of the light signals by the tissues with different depths.
2. The brain tissue blood oxygen monitoring device according to claim 1, further comprising: the device comprises a main control MCU unit, a power supply module, a communication module, a signal amplification and filtering module and a digital acquisition and amplification module;
the light source with the number D1 is an infrared light source with the number D1, the wavelength of the infrared light source with the number D1 is 730nm or 760nm, the light source with the number D2 is an infrared light source with the number D2, and the wavelength of the infrared light source with the number D2 is 850nm or 940 nm;
the main control MCU unit is in electric signal connection with the forehead sensor unit and outputs control signals to the light source with the number D1 and the light source with the number D2;
the photosensitive diode of the frontal sensor unit is in electric signal connection with the signal amplification and filtering module;
the digital acquisition amplification module is in electric signal connection with the signal amplification filtering module;
the emitted signals of the light source with the number D1 and the light source with the number D2 are absorbed and reflected by brain tissues, the reflected signals received by the photosensitive diode are output to the signal amplification and filtering module for amplification and filtering, and the processed signals are output to the digital acquisition and amplification module;
the main control MCU unit, the power module, the communication module and the monitoring main unit are integrated;
or the digital acquisition amplification module and the signal amplification filtering module are integrated on the forehead sensor unit;
or the digital acquisition amplifying module and the signal amplification filtering module are integrated in the monitoring main unit.
3. The device for monitoring blood oxygen in brain tissue according to claim 1, wherein said L1 is greater than 0 cm and less than 1cm, and the light signal received by the photodiode numbered J2 carries the information of absorption of infrared light signal by scalp and skull tissue;
the L2 is larger than 1cm and smaller than 2cm, and the light signals received by the serial number J1 photosensitive diode carry absorption information of cerebrospinal fluid and cerebral gray matter tissues to infrared light signals;
the L3 is larger than 3cm, and the light signals received by the serial number J3 photosensitive diode carry the absorption information of the brain gray matter tissue and the brain white matter tissue to the infrared light signals.
4. The brain tissue oximetry monitoring device of claim 1, wherein the light detection subunit further comprises a photodiode numbered J6, a photodiode numbered J7, a photodiode numbered J5;
the distance between the photosensitive diode with the number J6 and the light source with the number D1 and the light source with the number D2 is L2;
the distance between the photosensitive diode with the number J7 and the light source with the number D1 and the light source with the number D2 is L3;
the distance between the photosensitive diode with the number J5 and the light source with the number D1 and the number D2 is L3.
5. The brain tissue oximetry monitoring device according to claim 4, wherein the photodiode numbered J1 is electrically connected in parallel with the photodiode numbered J2;
or the number J1 photodiode is electrically connected in parallel with the number J6 photodiode;
or the number J2 photodiode is electrically connected in parallel with the number J6 photodiode;
or the photosensitive diode numbered J1, the photosensitive diode numbered J2 and the photosensitive diode numbered J6 are connected in parallel by electric signals;
or the photosensitive diode numbered J3 and the photosensitive diode numbered J7 are connected in parallel electrically;
or the photosensitive diode numbered J5 and the photosensitive diode numbered J7 are connected in parallel electrically;
or the photosensitive diode numbered J3 and the photosensitive diode numbered J5 are connected in parallel electrically;
or the photosensitive diode numbered J3, the photosensitive diode numbered J7 and the photosensitive diode numbered J5 are connected in parallel by electric signals;
the positive electrodes of the parallel photodiodes are connected by an electric signal, and the negative electrodes of the parallel photodiodes are connected by an electric signal.
6. The device for monitoring blood oxygen in brain tissue according to claim 5, wherein said light sensitive diode with number J1 and number J2 are connected in parallel to form a first path of detecting unit, and said light sensitive diode with number J3 and number J7 are connected in parallel to form a second path of detecting unit;
or the photosensitive diode with the number J1 and the photosensitive diode with the number J6 are connected in parallel to form a first path of detection unit, and the photosensitive diode with the number J5 and the photosensitive diode with the number J7 are connected in parallel to form a second path of detection unit;
or the photosensitive diode with the number J2 and the photosensitive diode with the number J6 are connected in parallel to form a first path of detection unit, and the photosensitive diode with the number J3 and the photosensitive diode with the number J5 are connected in parallel to form a second path of detection unit;
or the photodiodes with the numbers J1, J2 and J6 are connected in parallel to form a first path of detection unit, and the photodiodes with the numbers J3, J7 and J5 are connected in parallel to form a second path of detection unit.
7. The blood oxygen monitor device according to claim 3, wherein said number J1 photodiode is integrated with said number J6 photodiode as an integrally packaged photodiode, and two photodiodes are integrated in one package.
8. The blood oxygen monitor for brain tissue according to claim 3, wherein said number J3 photodiode, number J7 photodiode and J5 photodiode are integrally packaged photodiodes, and three photodiodes are integrated in one package.
9. The device for monitoring blood oxygen in brain tissue according to claim 3, wherein the blood oxygen probe in brain tissue comprises a rectangular flexible PCB, the light source numbered D1 and the light source numbered D2 are disposed at one end of the flexible PCB, the signal connector is disposed at the other end of the flexible PCB, the photodiode is disposed at one side of the light source numbered D1 and the light source numbered D2 from far to near, and the monitoring main unit is electrically connected with the blood oxygen probe in brain tissue through the signal connector.
10. The brain tissue blood oxygen monitoring device of claim 1, wherein the frontal sensor unit further comprises a number 2 brain tissue blood oxygen probe; the brain tissue blood oxygen probe numbered 1 can be set as a left half brain tissue blood oxygen probe, and the brain tissue blood oxygen probe numbered 2 can be set as a right half brain tissue blood oxygen probe.
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| CN202022792818.5U CN214157317U (en) | 2020-11-27 | 2020-11-27 | Brain tissue blood oxygen monitoring device |
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| CN202022792818.5U CN214157317U (en) | 2020-11-27 | 2020-11-27 | Brain tissue blood oxygen monitoring device |
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