CN202051703U

CN202051703U - 12 lead wireless real-time electrocardio (ECG) monitoring and analysis system

Info

Publication number: CN202051703U
Application number: CN2011201201226U
Authority: CN
Inventors: 杨玉星; 张博; 房磊; 谢庆国
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2011-11-30
Anticipated expiration: 2021-04-21

Abstract

The utility model discloses a 12 lead wireless real-time electrocardio (ECG) monitoring and analysis system comprising a 12 lead ECG wireless real-time acquisition unit, a 12 lead ECG wireless real-time receiving unit and an upper computer which are completely synchronous in parallel, wherein the 12 lead ECG wireless acquisition unit and the wireless receiving unit communicate with each other through a high-speed wireless link working in an industrial, scientific and medical (ISM) frequency band. The wireless acquisition unit uninterruptedly and synchronously acquires 12 lead ECG data, and sends the 12 lead ECG data to the paired wireless receiving unit through the wireless link in real time. The wireless receiving unit sends the data to the upper computer through a universal serial bus (USB) or a serial port. The upper computer completes real-time dynamic display, real-time analysis and storage or forwarding of ECG waveform. The 12 lead wireless real-time ECG monitoring and analysis system is applicable to the 12 lead ECG monitoring in wards, community health service stations or homes.

Description

A kind of 12 lead wireless real-time cardiac bioelectricity monitoring and analytical systems

Technical field

This utility model relates to medical Instrument field, is specifically related to a kind of 12 lead wireless real-time cardiac bioelectricity monitoring and analytical systems.

Background technology

Electrocardiosignal is one of the most important means of heart of monitoring at present, obtains the distribution of electrocardiosignal at body surface by the multi-lead system, reflects the motion change situation of heart, can diagnose multiple heart disease.And 12 electrocardios that lead are present clinical widely used cardioelectric monitor methods, obtain 3 limb leads of detected person by 10 electrodes, the electrocardiosignal of 3 augmented-leads and 6 chest leads, can react the heart movement situation of change comprehensively and accurately, comprehensively obtain the various parameter informations of heart.

Existing 12 lead in the synchronous electrocardiosignal monitoring technology, it is each road electrocardiosignal of gating by the multidiameter option switch sequencing that the electrocardiosignal of respectively leading is obtained, then it is gathered, it is not the signal of telecommunication that heart shows on the body surface different directions at synchronization, 12 electrocardiosignaies of leading that collect in this way, can exist between the electrocardiosignal of respectively leading to postpone, be not proper synchronous acquisition.May cause the cardiac electrical diagnosis of multi-lead certain deviation to occur thus.Up to the present, also do not see having document or patent to describe 12 methods that the electrocardio parallel synchronous gathers of leading.

12 lead the obtaining often by wired mode of electrocardiosignal are on one side promptly 10 or the line that more leads connect measured's body surface, Yi Bian be connected on the monitor.Monitor carries out dynamic waveform to the electrocardiosignal of real-time collection and shows, and calculates, and analyzes, and carries out auxiliary diagnosis or provides alarm signal.The detected person often requires to lie in and carries out cardioelectric monitor on the sick bed.And that heart disease often has is sudden, transience and very big danger, therefore cardiac or potential patient must carry out long electrocardio and monitor in real time and could accurately obtain heart information, reach timely warning, prevention in time and the effect of in time treating.Bed monitoring 12 electrocardiosignaies of leading are extremely inconvenient to patient for a long time, not only bring the serious discomfort sense to the patient, limit moving of patient simultaneously, and influence is life normally.

From existing document and data, the scheme that adopts wireless mode to obtain electrocardiosignal mainly contains following two kinds:

The one, gather electrocardiosignal by portable Holter, the patient can carry Holter and arbitrarily walk about, after Holter collects certain electrocardiosignal, the long-range server (the perhaps terminal of hospital) that sends to of mode by computer networking or mobile phone networking, this scheme has solved the irremovable problem of patient, but the signal that Holter gathers is the electrocardiosignal of a period of time often, do not have instantaneity, we fully real-time and dynamic obtain complete electrocardiogram (ECG) data long-range, show complete ecg wave form, therefore can not make diagnosis to patient's heart abnormality immediately He accurately.

The 2nd, by modes such as GSM/GPRS/3G/4G electrocardiosignal is gathered in real time, and send to the Internet in real time.This mode also can be to a certain degree the irremovable problem of solution patient, and data can be sent to remote endpoint arbitrarily.But, above-mentioned telecommunications/communication network does not often have real-time accurately yet, and limited bandwidth, usually can't carry out the successive transmission of mass data, but also can be subjected to multiple restriction such as current base station network signal, therefore be difficult to electrocardiosignal that the wireless transmission of real-time continuous collects to data receiver.When patient under the situation of hospital ward or community medicine station monitoring, also need not realize long-range data acquisition by above-mentioned dual mode, and only need with the electrocardiogram (ECG) data of gathering can be wireless in the patient sends to same environment on one's body in dynamic surveillance equipment.

Summary of the invention

At the problem that prior art exists, this utility model provides a kind of 12 lead wireless real-time cardiac bioelectricity monitoring and analytical systems, and this system has 12 the lead collection of electrocardio parallel synchronous, low-power consumption and characteristics easy to use.

A kind of 12 lead wireless real-time cardiac bioelectricity monitoring and analytical systems that this utility model provides is characterized in that this system comprises collecting unit, receiving element and host computer;

Collecting unit comprises electrode interface connected in series successively, synchronous acquisition circuit, controller and wireless transmitter module; Electrocardiosignal is input to synchronous acquisition circuit by electrode interface, controller control synchronous acquisition circuit is according to the sample rate work of setting, and the data that collect are sent to wireless transmitter module, wireless transmitter module is modulated to electromagnetic wave with the digital signal that receives and sends;

Receiving element comprises wireless receiving module connected in series successively, controller and interface module; Controller is used for wireless receiving module is configured, and the control wireless receiving module receives aerial electromagnetic wave signal, demodulates digital signal, and with the data packing that wireless receiving module receives, sends to interface module;

The host computer that is used for the data that receive are carried out analyzing and processing, storage electrocardiogram (ECG) data and Real time dynamic display result data links to each other with interface module.

Advantage of the present utility model and contribution of the present utility model are: the user can be as hospital ward or floor in certain protected environment, at the community sanitary station or at home, carry the wireless 12 electrocardiogram acquisition modules of leading, carry out real-time cardiac monitoring, the complete comprehensive electrocardiogram (ECG) data of continual collection, and send the data to real-time demonstration and analytical equipment in the same environment by wireless communication module.The acquisition module volume that the user carries is little, low in energy consumption, in light weight.The user uses this acquisition module collection 12 tunnel electrocardiosignaies of parallel synchronous fully, and sends to the far-end 12 wireless electrocardio receiving element that leads by Radio Link fully, can realize 72 hours on-line monitor.

Host computer can show patient's ecg wave form dynamically and carry out real-time analysis, calculating, storage and transmit by wide area network.

This utility model makes collection 12 that the user can the parallel synchronous electrocardiosignal of leading, and can move freely in 12 lead electrocardiogram monitor processes, and does not influence orthobiosis.

Description of drawings

Fig. 1 represents the overall construction drawing of wireless 12 lead electrocardiogram monitor of this utility model and analytical system.

Fig. 2 represents in this utility model in the collecting unit the 12 electrocardio parallel synchronous Acquisition Circuit structure charts that lead.

Fig. 3 represents collecting unit middle controller part-structure figure in this utility model.

Fig. 4 represents receiving element structure chart in this utility model.

Fig. 5 represents the flow chart of host computer analyzing and processing in this utility model.

The specific embodiment

Below by by embodiment this utility model being described in further detail, but following examples only are illustrative, and protection domain of the present utility model is not subjected to the restriction of these embodiment.

As shown in Figure 1, this utility model mainly comprises collecting unit 100, receiving element 200 and host computer 300.

Collecting unit 100 comprises electrode interface 110, synchronous acquisition circuit 120, controller 130 and wireless transmitter module 140.

Electrode interface 110, synchronous acquisition circuit 120, controller 130 and wireless transmitter module 140 are connected in series successively.

Electrocardiosignal is input to synchronous acquisition circuit 120 by electrode interface 110, controller 130 control synchronous acquisition circuits 120 are according to the sample rate work of setting, and the data that collect are sent to wireless transmitter module 140, wireless transmitter module 140 is modulated to electromagnetic wave with the digital signal of input and sends.

Receiving element 200 comprises wireless receiving module 210, controller 220 and interface module 230.

Wireless receiving module 210, controller 220 and interface module 230 are connected in series successively.Controller 220 control wireless receiving modules 210 receive aerial electromagnetic wave signal, demodulate digital signal, and with digital signal input interface module 230.Interface module 230 can be USB or serial ports transceiver module.

The data of host computer 300 receiving interface modules 230, and the data that receive are carried out analyzing and processing and demonstration.

As Fig. 2, synchronous acquisition circuit 120 comprises emitter follower 121, the inferior network 122 of Weir, resistor network 123, and 12 tunnel signal processing modules 124 arranged side by side, because the front end signal processing module 124 to 12 tunnel electrocardiosignaies is identical, all be by instrument amplifier 1240, high pass filter 1241, low pass filter 1242, operational amplifier 1243 and analog-digital converter 1244 are contacted successively, so this description is only done explanation to wherein one tunnel Signal Processing process of electrocardiosignal in 12 tunnel.Penetrate RA, the LA of grade follower 121, the outfan of LL links to each other with the inferior network 122 of Weir, the inferior central point of Weir, RA, LA, LL, V1, V2, V3, V4, V5 and V6 link to each other with resistor network 123.Resistor network 123 and instrument amplifier 1240, high pass filter 1241, low pass filter 1242, operational amplifier 1243 and analog-digital converter 1244 are contacted successively.

Electrocardiosignal is incorporated into electrode interface 110 from the user body surface by cardiac diagnosis lead-line, and electrode interface 110 has comprised RA, LA, RL, LL, V1, V2, V3, V4, V5 and V6 totally 10 the signal access points at least that lead.RA, LA, LL, V1, V2, V3, V4, V5 and V6 flow into the emitter follower 121 that is made of operational amplifier, improve the input impedance of electrocardiosignal.RA wherein, the inferior network 122 of signal input Weir of LA and LL obtains the inferior central point of Weir, and this point voltage outputs to RL by reverse emitter follower, drives as right lower limb.The inferior central point of Weir, RA, LA, LL, V1, V2, V3, V4, V5 and V6 are input to resistor network 123,1 to 12 totally 12 tunnel electrocardiosignaies of leading that obtain need detecting.

What 12 tunnel electrocardiosignaies were parallel is input in each self-corresponding signal processing module 124, and 12 tunnel signal processing module function is the same.The instrument amplifier 1240 that high cmrr is independently at first imported on each road carries out the difference amplification, is input to passive CR high pass filter 1241 elimination DC component and the low frequency components of single order then, reduces the interference such as baseline drift of electrocardiosignal.Be input to the high-frequency noise in the second-order low-pass filter 1242 elimination circuit that constitute by operational amplifier then.Low pass filter also carries out secondary to signal by operational amplifier 1243 and amplifies when signal is carried out filtering, then last amplifying signal is sent into the input of analog-digital converter (ADC) 1244.

As Fig. 3,12 tunnel analog-digital converter (ADC) 1244 walks abreast and is connected with controller 130 altogether, and controller 130 links to each other with wireless transmitter module 140.

Controller 130 is selected FPGA for use in the present embodiment.12 tunnel electrocardiosignaies are input to corresponding analog-digital converter after by the front end modulate circuit, controller 130 links to each other with No. 12 analog-digital converters by spi bus respectively, and, give analog-digital converter by the chip selection signal CS and the clock signal clk of spi bus for every road analog-digital converter provides sampling clock and change over clock.The data with analog-digital converter of controller 130 parallel synchronous are fetched controller 130 inside by the data foot of analog-digital converter.In controller 130 inside 12 16 receiving register is set, is used for receiving and deposits after the sampling of one-off pattern number converter 12 road cardiac electrical transformation results, 12*16 position altogether.Controller 130 can be by changing sampling clock the sampling rate of control break analog-digital converter.For example controller 130 every 0.5ms or 1ms or 2ms start the analog-digital converter once sampling, and then the sample rate of Dui Ying electrocardiosignal is respectively 2KSps, 1Ksps and 500Sps.

Wireless transmitter module 140 is after powering on, and controller 130 is configured it, determines its send mode.The sampled data serial of the MOSI of controller 130 by spi bus last time that internal register is deposited sends to wireless transmitter module 140 then, wireless transmitter module is gone into the wireless transmission relief area with the Data Loading that receives at once, and in real time data are modulated to electromagnetic wave, send by antenna.The every T of wireless transmitter module 140 receives the data that once come from controller 130 second, and receive before controller 130 sends data here next time, the data that send the 12*16 position of relief area is sent.Realized the collection immediately of electrocardiogram (ECG) data like this, sent immediately, guaranteed that the electrocardiogram (ECG) data transmission does not postpone, guaranteed that the upper function of far-end is wireless to obtain real-time electrocardiogram (ECG) data, thereby dynamically show real-time ecg wave form and auxiliary diagnosis result.

As Fig. 4, radio receiving unit 200 comprises wireless receiving module 210, controller 220 and interface module 230.

Wireless receiving module 210, controller 220 is connected successively with interface module 230.In the present embodiment, controller is selected FPGA for use.

After wireless receiving module 210 powered on, controller 220 at first was configured wireless receiving module 210, determined the wireless receiving mode.Wireless receiving module 210 begins to search the on-air radio signal then.In case receive signal, the wireless signal that receives is demodulated digital signal and deposit in the inner wireless receiving depositor.Because the every T of wireless transmitter module 140 can send one time the electrocardiogram (ECG) data bag second.Mean that so the every T of wireless receiving module 210 also can receive an electrocardiogram (ECG) data bag second.

The state of the inquiry radio receiving unit internal wireless receiving register that controller 220 does not stop, in case be found to be non-NULL, then meaning has data to receive.Controller 220 reads the electrocardiogram (ECG) data that receives by the MISO of spi bus from the data register of wireless receiving module 210, and can add packet header to the data of this frame, so that follow-up host computer procedure is distinguished data.

Controller 220 links to each other by the data/address bus of control bus with 16 with interface module 230.Controller 220 at first checks by detecting USB interface chip status pin Busy whether it is busy, if be not in a hurry, then this chip is write and enabled, and the data that will obtain from radio receiving unit send to the USB interface chip in the mode of 16 parallel-by-bits, in process of transmitting, 28 the packet header that controller 220 can add 12 tunnel 16 the section start of electrocardiogram (ECG) data in each frame constitutes a complete electrocardiogram (ECG) data bag, comprises altogether 13*16 position=208.Be divided into 13 times altogether and send to usb interface module 230.

Interface module is under the control of controller 220, and the data that send by 16 parallel-by-bit bus interface admission controllers 220 directly by inner USB engine, directly send to data in the USB transmit port buffer memory in the mode of DMA, wait for that host computer reads.

Host computer 300 reads the data in the USB port buffer memory, and real-time and dynamic shows ecg wave form, and real-time carries out characteristic point identification and analysis to waveform, and auxiliary doctor carries out heart disease diagnosis.Host computer can be a computer, notebook, smart mobile phone, PDA or self-defining medical monitoring equipment.

Realize the transparent transmission of electrocardiogram (ECG) data by the Radio Link that in closely, is based upon ISM (industrial science medical treatment) frequency range between electrocardiogram acquisition unit 100 and the electrocardio receiving element 200.This Radio Link is by setting up between wireless sending module and the far-end wireless receiving module, be operated in the ISM band that opens for free, 433MHz for example, 2.4GHz or the like, communication protocol can be wireless protocols arbitrarily, for example general RF, 802.11 (Wireless Fidelitys), (802.15.1 bluetooth), 802.15.4 (ZigBee) or the like.

As Fig. 5, by load corresponding driving and application program in host computer, host computer is sense data from the USB port buffer memory, and data are temporarily stored in the internal storage, and carries out computing.Host computer is at first finished electrocardiogram (ECG) data is unpacked, and identifies the data of leading and leading to 12 from 1.Then data are carried out Digital Signal Processing, comprise the 50Hz trap, high-pass filtering, low-pass filtering.Then the data after handling are discerned the characteristic point of ecg wave forms such as R crest value by the difference threshold method.Further calculate real-time heart rate, RR interval, parameters such as ST field offset amount.

Be achieved as follows function then:

(1) real-time and dynamic is plotted in 12 road waveforms on the screen, simultaneously calculating parameter and analysis result is presented on the screen synchronously.Under the control of program, can show the electrocardiosignal of leading arbitrarily by user selection.The user amplifies and dwindles the waveform of demonstration by the human computer conversation.

(2) implant or install complete ecg analysis program,, comprise the heart rate variability time-domain analysis carrying out comprehensive playback analysis with the complete electrocardiogram (ECG) data of preserving, the heart rate variability frequency-domain analysis, heart rate variability nonlinear analysis, ST section strengthen to be analyzed, and QTd analyzes and various ecg analysis.

(3) selectivity stores the electrocardiogram (ECG) data that receives into memory access that power down is not lost, in equipment such as hard disk, Flash, and convenient follow-up reading and checking.

(4) by connecting the mode of the Internet, for example by GPRS, 3G or ADSL etc. share or the local electrocardiogram (ECG) data of having deposited of transmission and the result of electrocardiogrph calculation and Analysis.

This utility model not only is confined to the above-mentioned specific embodiment; persons skilled in the art are according to the disclosed content of this utility model; can adopt other multiple specific embodiment to implement this utility model; therefore; every employing project organization of the present utility model and thinking; do some simple designs that change or change, all fall into the scope of this utility model protection.

Claims

1. lead for one kind 12 wireless real-time cardiac bioelectricity monitoring and analytical system is characterized in that this system comprises collecting unit (100), receiving element (200) and host computer (300);

Collecting unit (100) comprises electrode interface connected in series successively (110), synchronous acquisition circuit (120), controller (130) and wireless transmitter module (140); Electrocardiosignal is input to synchronous acquisition circuit (120) by electrode interface (110), controller (130) control synchronous acquisition circuit (120) is according to the sample rate work of setting, and the data that collect are sent to wireless transmitter module (140), wireless transmitter module (140) is modulated to electromagnetic wave with the digital signal that receives and sends;

Receiving element (200) comprises wireless receiving module connected in series successively (210), controller (220) and interface module (230); Controller (220) is used for wireless receiving module (210) is configured, control wireless receiving module (210) receives aerial electromagnetic wave signal, demodulate digital signal, and, send to interface module (230) the data packing that wireless receiving module (210) receives;

The host computer (300) that is used for the data that receive are carried out analyzing and processing, storage electrocardiogram (ECG) data and Real time dynamic display result data links to each other with interface module (230).

2. according to claim 1 12 lead wireless real-time cardiac bioelectricity monitoring and analytical systems, it is characterized in that, synchronous acquisition circuit (120) comprises emitter follower (121), the inferior network of Weir (122), resistor network (123) and 12 tunnel signal processing modules (124) arranged side by side; Every road signal processing module (124) all comprises instrument amplifier (1240), high pass filter (1241), low pass filter (1242), operational amplifier (1243) and analog-digital converter (1244);

RA, the LA of emitter follower (121), the outfan of LL link to each other with the inferior network of Weir (122), the inferior network of Weir (122) links to each other with emitter follower (121), and the inferior central point of Weir, RA, LA, LL, V1, V2, V3, V4, V5 and V6 link to each other with resistor network (123); Resistor network (123) and instrument amplifier (1240), high pass filter (1241), low pass filter (1242), operational amplifier (1243) and analog-digital converter (1244) are contacted successively;

12 tunnel analog-digital converter (1244) is parallel to be connected with controller (130).