CN100475131C - Nerve intensive monitor system and method for realizing synchronous monitor of human multi-parameter signals - Google Patents

Nerve intensive monitor system and method for realizing synchronous monitor of human multi-parameter signals Download PDF

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CN100475131C
CN100475131C CNB2006100612319A CN200610061231A CN100475131C CN 100475131 C CN100475131 C CN 100475131C CN B2006100612319 A CNB2006100612319 A CN B2006100612319A CN 200610061231 A CN200610061231 A CN 200610061231A CN 100475131 C CN100475131 C CN 100475131C
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CN1883380A (en
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陈思平
王筱毅
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SHENZHEN DELICA MEDICAL EQUIPMENT CO., LTD.
Shenzhen University
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Shenzhen University
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Abstract

A neurological intensive care system comprising a signal collection system, a PC system for processing and displaying collected signal and a method for realizing human body multi-parameter in-phase monitor, wherein the signal collection system comprising a TCD module provided with a signal collection module, an EEG/MP module, a sample keeping circuit for in-phase sampling signals outputted from various collection channels, an A/D converter and a S/H control module for generating A/D conversion control signal and sampling control signal ; the method including: A. setting sampling control signal S/H in-phase with same clock pulse. B. employing S/H signal to enable all the signal channels to conduct in-phase sampling on TCD signal, EEG and MP signal in a same sampling point. C. A/D converting on the in-phase sampled analog signal sampling point and cache outputting the obtained digital signals. D. processing and displaying the digital signals by PC system. The invention realizes an in-phase monitor of TCD, EEG and MP signals.

Description

Neural Intensive Care Therapy system and realization human multi-parameter signals be the method for monitoring synchronously
Technical field
The present invention relates to field of medical, relate in particular to a kind of neural Intensive Care Therapy system, and realize human multi-parameter signals such as brain function and the cerebral circulation method of monitoring synchronously.
Background technology
Neural serious symptom is each system of body (nerve, circulation, breathing, endocrine, digestion etc.) serious brain function and disturbance of cerebral circulation that the different causes of disease cause, and the patient has the severe disturbance of consciousness, stops as stupor, decortical state, status epilepticus and cerebral circulation etc.In diagnoses and treatment process to neural serious symptom, long-range is observed neural patient with severe symptoms's brain function, the situation of cerebral circulation and vital sign, monitoring PD and variation, estimate therapeutic effect, judge that patient's prognosis is very necessary and very important, and the monitoring of brain function and cerebral circulation also is the indispensable golden index of the judgement brain death assert in the world, therefore, brain function to neural patient with severe symptoms, cerebral circulation and vital sign multiparameter are implemented monitoring synchronously, its guardianship content includes: electroencephalogram EEG-Electroencephalogram (corresponding brain function), transcranial doppler TCD-Transcranial Doppler (corresponding cerebral circulation), electrocardiogram, breathe, ambulatory blood pressure, blood oxygen saturation, body temperature etc. (corresponding vital sign multiparameter MP-Multi-Parameters) are the advanced subject in domestic and international neuroscience field and the research direction of emphasis at present.
Present domestic only have electroencephalogram and the synchronous monitor of vital sign, its analytic function is simple, can not carry out cerebral circulation guards synchronously, its monitoring function is limited to brain electricity analytical, and neural critically ill patient symptom is 70% relevant with cerebral circulation, therefore existing electroencephalogram and the synchronous monitor of vital sign can not provide comprehensive valuable monitoring diagnostic message, satisfy clinical neural Intensive Care Therapy demand.
Summary of the invention
Technical problem to be solved by this invention is: a kind of neural Intensive Care Therapy system is provided, this system can be to TCD blood flow signal and EEG electricity physiological signal, or TCD blood flow signal and MP vital sign parameter signals, or TCD blood flow signal and EEG electricity physiological signal and MP vital sign parameter signals implementation monitoring synchronously.
Another object of the present invention is that a kind of human multi-parameter signals method of monitoring synchronously that realizes is provided.
The technical solution adopted in the present invention is:
A kind of neural Intensive Care Therapy system comprises signal acquiring system and processing/display system that the signal that collects is processed and displayed, and described signal acquiring system links to each other with processing/display system by interface; Described signal acquiring system comprises:
At least one TCD module that is used to gather the TCD signal, and, at least one MP module that is used to gather the EEG module of EEG signal and/or is used to gather the multi-parameter life sign signal; Described TCD module, EEG module and MP module respectively comprise at least one signals collecting path;
A plurality of sampling hold circuits that link to each other with each signals collecting path outfan respectively, this sampling hold circuit to each gather path output signal carry out synchronized sampling;
Multichannel or multi-disc A/D converter, described A/D converter are gone into end and are linked to each other with the sampling hold circuit outfan respectively, are used for the analog signal conversion of sampling output is become digital signal;
One control module that is connected with interface communication, this module is used for producing and is used to control A/D converter and carries out analog-to-digital A/D changeover control signal, also produce and the synchronous sampling control signal of same clock pulses, described sampling control signal is used to control the sampled point that each sampling hold circuit obtains TCD signal, EEG signal and/or MP signal synchronously.
A kind of neural Intensive Care Therapy system comprises signal acquiring system and processing/display system that the signal that collects is processed and displayed, and described signal acquiring system links to each other with processing/display system by interface; Described signal acquiring system comprises:
At least one TCD module that is used to gather the TCD signal, and, at least one MP module that is used to gather the EEG module of EEG signal and/or is used to gather the multi-parameter life sign signal; Each module comprises at least one signals collecting path;
A plurality of sampling hold circuits that link to each other with each signals collecting path outfan respectively, this sampling hold circuit to each gather path output signal carry out synchronized sampling;
One A/D converter is used for the analog signal conversion of sampling output is become digital signal;
A plurality of channel signal selectores and a chip selector, described channel signal selector is gone into end and is connected with each sampling hold circuit outfan respectively, its outfan is gone into end with described chip selector and is connected, and the outfan of described chip signal selector links to each other with the end of going into of A/D converter;
One control module that is connected with interface communication, this module is used to produce the A/D changeover control signal, and described A/D changeover control signal is used to control A/D converter and carries out analog digital conversion; And generation and the synchronous sampling control signal of same clock pulses, described sampling control signal is used to control the sampled point that each sampling hold circuit obtains TCD signal, EEG signal and/or MP signal synchronously; Also produce channel selecting control signal and sheet selected control system signal, described channel selecting control signal and sheet selected control system signal are realized the signal selection by control channel signal selector and chip signal selector respectively, the analogue signal of sampling output is delivered to A/D converter successively carry out analog digital conversion.
Described neural Intensive Care Therapy system, wherein: described control module adopts FPGA to realize.
Described neural Intensive Care Therapy system, wherein: described A/D converter outfan is connected with FPGA, and the digital signal of A/D converter output is exported behind the FPGA buffer memory.
Described neural Intensive Care Therapy system, wherein: described channel signal selector and chip selector adopt identical multiple signals selector.
Described neural Intensive Care Therapy system, wherein: described sampling hold circuit comprises: an analog switch, an operational amplifier and an electric capacity; Described electric capacity is connected between the in-phase input end and ground of operational amplifier, the outfan of going into end connection signal acquisition circuit of described analog switch, the in-phase input end of the outfan concatenation operation amplifier of analog switch, the outfan concatenation operation amplifier's inverting input of operational amplifier, described sampling control signal is applied on the control end of described analog switch.
Described neural Intensive Care Therapy system, wherein: described processing/display system adopts the PC system, and described interface is the PC interface.
A kind of human multi-parameter signals method of monitoring synchronously that realizes comprises the steps:
A, collection TCD signal and EEG signal and/or MP signal are provided with and the synchronous sampling control signal of a clock pulses;
B, control each signalling channel with described sampling control signal TCD signal, EEG signal and MP signal are carried out synchronized sampling, make the sampled point of each signalling channel identical;
C, the analogue signal sampling point that synchronized sampling is obtained carry out the A/D conversion, obtain buffer memory output behind the digital signal;
D, this digital signal is handled and shown with screen by processing/display system.
Described method, wherein: described step C comprises the steps:
C1, channel selecting control signal and sheet selected control system signal are set;
C2, described selected control system signal controlling chip selector are selected different channel to channel adapters successively, and selected channel to channel adapter is under the control of channel control signals, and the analogue signal that each channel sample is obtained is delivered to A/D converter successively;
C3, A/D converter carry out analogue signal the A/D conversion successively, obtain exporting through buffer memory behind the digital signal again.
Described method, wherein: described sampling control signal, channel selecting control signal and sheet selected control system signal obtain by same clock pulses frequency division
Beneficial effect of the present invention is: the present invention has realized showing to the synchronous acquisition of TCD blood flow signal and EEG electricity physiological signal and MP vital sign parameter signals with screen, therefore finally realized synchronous monitoring to TCD blood flow signal and EEG electricity physiological signal and MP vital sign parameter signals, really provide comprehensive and valuable monitoring diagnostic message for clinical neural critically ill patient, monitoring quality and treatment level have been improved to the patient with severe symptoms, reduced mortality rate, alleviate medical personnel's working strength simultaneously, thereby the medical level to neural patient with severe symptoms is got a promotion on the whole.And because the computer record with PC system provides great help to the consultation of doctors and medical treatment proof.
Description of drawings
Fig. 1 is an Intensive Care Therapy system principle block diagram of the present invention;
Signal acquiring system block diagram when Fig. 2 is multi-disc or multichannel A/D modular converter;
Signals collecting control sequential chart when Fig. 3 is multi-disc or multichannel A/D modular converter;
Signal acquiring system block diagram when Fig. 4 is monolithic A/D modular converter;
Signals collecting control sequential chart when Fig. 5 is the A/D modular converter;
Fig. 6,7,8,9 is respectively an embodiment of sampling hold circuit and channel to channel adapter;
Figure 10 is an embodiment of chip signal selector, monolithic a/d converter and signals collecting/control module.
The specific embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
In order to realize the synchronous monitoring between TCD blood flow signal, EEG electricity physiological signal and the multi-parameter life sign signal, the present invention adopts technical scheme as shown in Figure 1, comprise signal acquiring system and processing/two large divisions of display system system, processing/display system adopts the PC system to realize usually; Adopt the PC interface to connect between signal acquiring system and the PC system, the PC interface adopts the USB controller usually.Signal acquiring system is used for TCD blood flow signal, EEG electricity physiological signal and the MP vital sign parameter signals that synchronous acquisition is estimated cerebral circulation, brain function and vital sign, and with synchronous acquisition to these analog signal conversion become digital signal, export to the PC system by the USB controller again, the PC system handles digital signal and shows with screen, realizes the synchronous monitoring to cerebral circulation, brain function and vital sign multiparameter.
And cerebral circulation, brain function and vital sign multiparameter are realized the key of monitoring synchronously being the synchronous acquisition to TCD blood flow signal, EEG electricity physiological signal and MP vital sign parameter signals, therefore lay particular emphasis on analysis to signal acquiring system at this.In the technical program, signal acquiring system as shown in Figure 1 and Figure 2, a plurality of signal acquisition module are set according to the actual requirements, when for example only cerebral circulation and brain function being guarded synchronously, one or more TCD modules and EEG module are set, and TCD module and EEG module comprise at least one signals collecting path separately; The rest may be inferred, when only cerebral circulation and vital sign multiparameter being guarded synchronously, one or more TCD modules and MP module are set, when cerebral circulation and brain function and vital sign multiparameter are guarded synchronously, one or more TCD modules, EEG module and MP module are set, and can adopt EEG and MP signals collecting path work general EEG/MP module together, and adopt the NIBP module that only comprises NIBP (Non-Invasive Blood Pressure non-invasive blood pressure) signal sampling channel.
According to the signal sampling channel sum a plurality of sampling hold circuits are set, sampling hold circuit links to each other with each signals collecting path outfan, be used for to each gather path output signal carry out synchronized sampling; Sampling hold circuit can adopt general circuit structure, comprise an analog switch, an operational amplifier and an electric capacity, the outfan of going into end connection signal acquisition circuit of analog switch, the in-phase input end of the outfan concatenation operation amplifier of analog switch, electric capacity are connected between the in-phase input end and ground of operational amplifier; Control end at each analog switch all applies a sampling control signal S/H, S/H is synchronized with same clock pulses, S/H is used to control the sampled point that each sampling hold circuit obtains TCD signal, EEG signal and MP signal synchronously, thereby realizes each is gathered obtaining synchronously of path output signal.The output of sampling hold circuit connects multichannel A/D conversion transducer or multi-disc A/D conversion transducer, A/D conversion transducer is used for the analog signal conversion of sampling output is become digital signal, the signalling channel sum of A/D conversion this moment transducer must be more than or equal to the signal sampling channel sum of signal acquisition module, just can will carry out the A/D conversion simultaneously through the analogue signal of sampling hold circuit synchronized sampling output, and the output of the digital signal serial or parallel after will changing.
One control module that is connected with the communication of USB controller, during this module can be used, small scale integration (gate circuit, enumerator, latch) makes up, also can utilize programming device (PLD, CPLD, FPGA) to realize, present embodiment adopts FPGA (Field-Programmable GateArray-field programmable logic array).This FPGA is connected with a clock pulses signal, the clock signal of a 2M for example, FPGA carries out frequency division with the clock signal of 2M, obtain being used to control A/D converter and carry out analog-to-digital A/D changeover control signal C/S, and S/H signal, the frequency of S/H is 1kHz, by each sampling hold circuit of the unified control of S/H signal is sampled, and has realized obtaining synchronously signal.The sequential chart of the technical program this shows as shown in Figure 3, behind the signal process sampling hold circuit synchronized sampling that TCD module, EEG/MP module, three modules of NIBP module collect, can carry out the A/D conversion simultaneously.
Another kind of technical scheme of the present invention as shown in Figure 4, the signal acquisition module of this scheme and sampling hold circuit and technique scheme are identical, different is: only adopt a slice A/D converter, and channel to channel adapter MUX0, MUX1, MUX2, MUX3 have been increased, and chip selector MUX4, MUX0-MUX4 can be identical multiple signals selector, MUX0, MUX1, MUX2, MUX3 go into end and are connected with each sampling hold circuit outfan respectively, its outfan is gone into end with MUX4 and is connected, and the outfan of MUX4 links to each other with the end of going into of A/D converter; After sampling hold circuit is sampled to signal, successively signal is given A/D converter by the multiple signals selector and be carried out the A/D conversion.For this reason, after FPGA carries out frequency division with the clock signal of 2M, also produce channel selecting control signal MPX0, MPX1, MPX2 (the unified MPX[2...0 that is expressed as]) and sheet selected control system signal ENMPX[1...3], MPX[2...0] and ENMPX[1...3] realize the signal selection by control channel signal selector and chip signal selector respectively, the analogue signal of sampling output is delivered to A/D converter successively carry out the A/D conversion.The signals collecting sequential of the technical program as shown in Figure 5.Before this sequential chart is described, need be as follows to relevant signal instruction:
S/H: sampling control signal, be digital signal, switch closure during low level is sampled; Switch opens during high level enters hold mode.
The CS:A/D changeover control signal is digital signal, and A/D begins conversion during low level.
DCLK: the master clock signal of signals collecting, conversion.
The dateout of DOUT:A/D transducer.
MPX[2...0]: the channel selecting control signal, be used for the MUX0-MUX3 signalling channel and select, be digital signal, signal selection mode such as following table:
MPX[2] MPX[1] MPX[0] Signal path
0 0 0 1
0 0 1 2
0 1 0 3
0 1 1 4
1 0 0 5
1 0 1 6
1 1 0 7
1 1 1 8
ENMPX[1...3]: sheet selected control system signal, be used for MUX0-MUX3 is carried out the sheet choosing, be digital signal, signal selection mode such as following table:
ENMPX[3] ENMPX[2] ENMPX[1] ENMPX[0] MUX selects
1 1 1 0 MUX0
1 1 0 1 MUX1
1 0 1 1 MUX2
0 1 1 1 MUX3
By sequential chart 4 as can be seen, after the S/H signal arrives, ENMPX[3...0] signal is effective successively, choose 4 a slices among the MUX, selected MUX is at MPX[2...0] under the control of signal, give A/D with the signal that keeps successively, A/D is converted to DOUT to signal.For example, after first S/H signal arrives, sequential enters the MUX0 interval, in the MUX0 interval, ENMPX[0] low level appears twice in signal, and ENMPX[1...3] signal is high level, and it is selected that this just is illustrated in the MUX0 interval multiple signals selector MUX0, and multiple signals selector MUX1,2,3 not selected; When ENMUX0 is low level, MPX[2...0] change according to 000,001,010,011,100,101,110,111 orders, choose the passage 1,2,3,4,5,6,7,8 of MUX0 successively, signal is delivered to A/D converter, simultaneously, whenever choose a channel C S effectively once, so just the signal of choosing is changed by A/D.This order A/D conversion regime, short as long as A/D converts the time in time ratio sampling interval, just can realize, and this technical scheme has the advantage that cost is low, circuit is simple, reliability is high.
For first kind of technical scheme, collection/control module among Fig. 1 comprises sampling hold circuit, A/D converter and control module, and for second kind of technical scheme, the collection/control module among Fig. 1 comprises sampling hold circuit, A/D converter, control module and multiple signals selector.In the specific implementation process of scheme, satisfying under the prerequisite of signal quality, can select multiple different analog switch, operational amplifier, sampling capacitance to realize sample/hold circuit according to practical situation, all do not influence the function of sample/hold circuit; Simultaneously, MUX also can according to circumstances be selected different models.Fig. 6,7,8,9 is respectively the sampling hold circuit and the channel to channel adapter part of the Intensive Care Therapy system of a practical application, and Figure 10 is chip signal selector, monolithic a/d converter and the control module that realized by FPGA.In this embodiment, have 32 tunnel signals collecting paths, 8 road TCD signals collecting paths are wherein arranged, 24 road EEG, MP signals collecting path, wherein, EEG1~EEG16: E.E.G input signal 1~E.E.G input signal 16, ECG: electrocardio input signal, EMG: emg input signal, EOG: eye movement input signal, SONRE: sound of snoring input signal, RESPA: mouth and nose are breathed input signal, RESPC: chest is breathed input signal, RESPF: abdominal respiration input signal, NIBP: the non-invasive blood pressure input signal, each signals collecting path connects a sampling hold circuit.Sampling hold circuit has adopted analog switch ADG621 and operational amplifier TLC2254 and electric capacity to form, channel to channel adapter MUX0, MUX1, MUX2, MUX3, and chip selector MUX4 adopts MUX TC74HC4051 to come signal is selected, because the chip selector has 4 tunnel inputs, therefore realize with two TC74HC4051 serial connections, A/D converter has been selected ADS8320 serial output A/D, and signals collecting control sequential utilizes FPGA to produce.The digital signal of A/D converter output can be directly be sent to that the PC system handles and shows with screen through a buffer memory and PC interface, simultaneously in order to make full use of the FPGA resource, the A/D converter outfan also can be connected with FPGA, and the digital signal of A/D converter output is exported behind the FPGA buffer memory.
The present invention proposes and realize TCD signal, EEG, the MP signal method of monitoring synchronously, described method comprises the steps:
A, gather TCD signal, EEG signal, or TCD signal, MP signal, or TCD signal, EEG signal and MP signal, be provided with and the synchronous sampling control signal S/H of same clock pulses;
B, TCD signal, EEG, MP signal are carried out synchronized sampling, make the sampled point of each signalling channel identical with each signalling channel of the unified control of S/H signal;
C, the analogue signal sampling point that synchronized sampling is obtained carry out the A/D conversion, obtain buffer memory output behind the digital signal;
D, this digital signal is handled and shown with screen by the PC system.
When adopting monolithic A/D conversion, described step C comprises the steps:
C1, channel selecting control signal MPX[2...0 is set] and sheet selected control system signal ENMPX[1...3];
C2, ENMPX[1...3] the control chip selector selects different channel to channel adapters successively, selected channel to channel adapter is at MPX[2...0] control under, the analogue signal that each channel sample is obtained is delivered to A/D converter successively;
C3, A/D converter carry out analogue signal the A/D conversion successively, obtain exporting through buffer memory behind the digital signal again.
When adopting multichannel or multi-disc A/D conversion, the total number of channels of A/D converter signal input can satisfy TCD signal, EEG/MP signal, NIBP signal and change simultaneously, the total number of channels that is the input of A/D converter signal is more than or equal to TCD signal, EEG/MP signal, NIBP signalling channel sum, and A/D converter is changed output simultaneously.
Above-mentioned sampling control signal S/H, channel selecting control signal MPX[2...0] and sheet selected control system signal ENMPX[1...3] obtain by same clock pulses (2M) frequency division.
Should be understood that; neural Intensive Care Therapy system of the present invention and realization TCD signal, EEG, MP signal be the method for monitoring synchronously; above-mentioned description at preferred embodiment is too concrete; can not therefore be interpreted as restriction to scope of patent protection of the present utility model; for those of ordinary skills; can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.

Claims (10)

1, a kind of neural Intensive Care Therapy system comprises signal acquiring system and processing/display system that the signal that collects is processed and displayed, and described signal acquiring system links to each other with processing/display system by interface; It is characterized in that: described signal acquiring system comprises:
At least one TCD module that is used to gather the transcranial doppler signal, and, at least one MP module that is used to gather the EEG module of EEG signal and/or is used to gather the multi-parameter life sign signal; Described TCD module, EEG module and MP module respectively comprise at least one signals collecting path;
A plurality of sampling hold circuits that link to each other with each signals collecting path outfan respectively, this sampling hold circuit to each gather path output signal carry out synchronized sampling;
Multichannel or multi-disc A/D converter, described A/D converter are gone into end and are linked to each other with the sampling hold circuit outfan respectively, are used for the analog signal conversion of sampling output is become digital signal;
One control module that is connected with interface communication, this module is used for producing and is used to control A/D converter and carries out analog-to-digital A/D changeover control signal, also produce and the synchronous sampling control signal of same clock pulses, described sampling control signal is used to control the sampled point that each sampling hold circuit obtains transcranial doppler signal, EEG signal and/or multi-parameter life sign signal synchronously.
2, a kind of neural Intensive Care Therapy system comprises signal acquiring system and processing/display system that the signal that collects is processed and displayed, and described signal acquiring system links to each other with processing/display system by interface; It is characterized in that: described signal acquiring system comprises:
At least one TCD module that is used to gather the transcranial doppler signal, and, at least one MP module that is used to gather the EEG module of EEG signal and/or is used to gather the multi-parameter life sign signal; Each module comprises at least one signals collecting path;
A plurality of sampling hold circuits that link to each other with each signals collecting path outfan respectively, this sampling hold circuit to each gather path output signal carry out synchronized sampling;
One A/D converter is used for the analog signal conversion of sampling output is become digital signal;
A plurality of channel signal selectores and a chip selector, described channel signal selector is gone into end and is connected with each sampling hold circuit outfan respectively, its outfan is gone into end with described chip selector and is connected, and the outfan of described chip signal selector links to each other with the end of going into of A/D converter;
One control module that is connected with interface communication, this module is used to produce the A/D changeover control signal, and described A/D changeover control signal is used to control A/D converter and carries out analog digital conversion; And generation and the synchronous sampling control signal of same clock pulses, described sampling control signal is used to control the sampled point that each sampling hold circuit obtains transcranial doppler signal, EEG signal and/or multi-parameter life sign signal synchronously; Also produce channel selecting control signal and sheet selected control system signal, described channel selecting control signal and sheet selected control system signal are realized the signal selection by control channel signal selector and chip signal selector respectively, the analogue signal of sampling output is delivered to A/D converter successively carry out analog digital conversion.
3, neural Intensive Care Therapy according to claim 2 system, it is characterized in that: described control module adopts FPGA to realize.
4, neural Intensive Care Therapy according to claim 3 system, it is characterized in that: described A/D converter outfan is connected with FPGA, and the digital signal of A/D converter output exports processing/display system to behind the FPGA buffer memory.
5, neural Intensive Care Therapy according to claim 4 system, it is characterized in that: described channel signal selector and chip selector adopt identical multiple signals selector.
6, according to the described neural Intensive Care Therapy of the arbitrary claim of claim 2 to 5 system, it is characterized in that: described sampling hold circuit comprises: an analog switch, an operational amplifier and an electric capacity; Described electric capacity is connected between the in-phase input end and ground of operational amplifier, the outfan of going into end connection signal acquisition circuit of described analog switch, the in-phase input end of the outfan concatenation operation amplifier of analog switch, the outfan concatenation operation amplifier's inverting input of operational amplifier, described sampling control signal is applied on the control end of described analog switch.
7, neural Intensive Care Therapy according to claim 6 system, it is characterized in that: described processing/display system adopts the PC system, and described interface is the PC interface.
8, a kind of human multi-parameter signals method of monitoring synchronously that realizes comprises the steps:
A, collection transcranial doppler signal and EEG signal and/or multi-parameter life sign signal are provided with and the synchronous sampling control signal of a clock pulses;
B, control each signalling channel with described sampling control signal transcranial doppler signal, EEG signal and multi-parameter life sign signal are carried out synchronized sampling, make the sampled point of each signalling channel identical;
C, the analogue signal sampling point that synchronized sampling is obtained carry out the A/D conversion, obtain buffer memory output behind the digital signal;
D, this digital signal is handled and shown with screen by processing/display system.
9, method according to claim 8 is characterized in that: described step C comprises the steps:
C1, channel selecting control signal and sheet selected control system signal are set;
C2, described selected control system signal controlling chip selector are selected different channel to channel adapters successively, and selected channel to channel adapter is under the control of channel control signals, and the analogue signal that each channel sample is obtained is delivered to A/D converter successively;
C3, A/D converter carry out analogue signal the A/D conversion successively, obtain exporting through buffer memory behind the digital signal again.
10, method according to claim 9 is characterized in that: described sampling control signal, channel selecting control signal and sheet selected control system signal obtain by same clock pulses frequency division.
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多参数脑组织代谢监测在神经外科中的应用. 包映晖等.中华神经外科杂志,第19卷第4期. 2003 *
重型颅脑损伤多参数脑血流动力学监测. 郑爱茗.国外医学护理学分册,第20卷第4期. 2001
重型颅脑损伤多参数脑血流动力学监测. 郑爱茗.国外医学护理学分册,第20卷第4期. 2001 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101627909B (en) * 2009-05-05 2014-06-11 复旦大学附属儿科医院 Digital amplitude-integrated cerebral function monitor

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