CN102270270A - Remote medical auscultation and consultation system - Google Patents
Remote medical auscultation and consultation system Download PDFInfo
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Abstract
The invention discloses a remote medical auscultation and consultation system, and belongs to the technical field of electronic information and remote medical treatment. The system comprises a doctor terminal computer, a user terminal computer, an electronic auscultator, a hardware switching device and a network; the doctor terminal computer is provided with a voice mike and a camera and provided with an interface design sub module, a network communication sub module, a real-time display sub module, an auxiliary diagnosis sub module, a database sub module and a help system sub module; the doctor terminal computer can receive audio data from the network, play and realize data waveform and acquire auxiliary diagnosis parameters; the user terminal computer is provided with a voice mike and a camera and provided with an interface design sub module, a real-time display sub module, a network communication sub module and a help system sub module; the user terminal computer can transmit the audio data to the network; the electronic auscultator is used for acquiring the heart sound data of a patient and connected with an auscultator interface of the hardware switching device; the hardware switching device is used for switching voice and heart sound; and the network is used for connecting a user terminal and a doctor terminal and can transmit the audio data.
Description
Technical field
The invention belongs to electronic information and tele-medicine technical field, particularly relate to a kind of remote medical treatment auscultation advisory system.Home-confined seeking medical advice can be realized by auscultation advisory system of the present invention, the unusual of heart can be in time found; In addition, to the processing of cardiechema signals, can help the doctor to obtain more original heart information, and then accurately diagnose the state of an illness.
Background technology
Along with improving constantly of living standard, people are more harsh to the requirement of medical treatment ﹠ health aspect, and current health care system can't reach the standard that people expect in the heart: real-time, convenient, fast, accurate.Because China's medical resource is limited, causes the patient of remote districts in time to seek medical advice, and delayed the optimal treatment phase; Moreover social population's aging is on the rise, younger generation's life and to support old man's pressure also increasing, and existing medical system is difficult to satisfy people's demand.
Mainly there is following problem in current medical system:
1. the medical resource distribution is seriously inhomogeneous, and areal variation is very big; 2. people improve day by day to the requirement of health care; 3. doctor's value can't be utilized fully; 4. to some serious communicable diseases (as SARS, first stream etc.), doctor's inconvenience directly contacts with patient.
In considerable time, the shared mechanism of technology, cost, information and people's traditional concept have restricted the development of tele-medicine greatly in the past.And now, along with the development of IT technology, the expansion of telecommunication service, people's custom gradually live in and be full of in the Internet world, implement medical diagnosis by the Internet and can make things convenient for more crowd, can allow faster that the rhythm of life becomes, can allow more doctor embody their value place.
At present, more existing both at home and abroad patents of invention at the remote medical treatment auscultation aspect, but majority all is to stethoscopic improvement; The patent of invention that the remote medical treatment auscultation system aspect is also arranged, the pattern of its structure and employing is close substantially, but is not very perfect to the transmission of signal and the function of software aspect.
Summary of the invention
The big problem of interference caused by subjective factors under traditional auscultation pattern of reaching non-timely at existing cardiophony, the invention provides and a kind ofly can allow patient is home-confined just to enjoy good prescription on individual diagnosis condition, the while can assist the doctor to make accurate diagnosis, solve the remote medical treatment auscultation advisory system of people's difficulty and high cost of getting medical problem conscientiously.
To achieve these goals, the present invention adopts following technical scheme, and a kind of remote medical treatment auscultation advisory system comprises doctor's terminal computer, user terminal computer, electronic auscultation device, hardware switching device shifter and network,
Described doctor's terminal computer, it has voice Mike and camera, and has INTERFACE DESIGN submodule, network service submodule, real-time display sub-module, auxiliary diagnosis submodule, database submodule and help system submodule; This doctor's terminal computer can be finished from described network and receive voice data, and can play, realize data waveform, obtains the auxiliary diagnosis parameter;
Described user terminal computer, it has voice Mike and camera, and has INTERFACE DESIGN submodule, real-time display sub-module, network service submodule and help system submodule, and this user terminal computer can be sent to described network with described voice data;
Described electronic auscultation device is used to gather patient's heart sound data, and this electronic auscultation device is connected with the stethoscope interface that described hardware switches transposition;
Described hardware switching device shifter is used for the switching of voice and hear sounds;
Described network is used to connect described user terminal computer and described doctor's terminal computer, and can transmits described voice data.
The network service submodule of described doctor's terminal computer and user terminal computer, carry out according to following steps:
Step 1: obtain the RTC interface, determine communication capacity;
Step 2: select communication type;
Step 3: select communication facilities;
Step 4: initialize session;
Step 5: handle the RTC incident;
Step 6: create communication session, handle the words incident that fails to be convened for lack of a quorum in real time, comprise that media event, volume incident, instant message incident, session status change incident;
Step 7: close session.
The real-time display sub-module of described doctor's terminal computer and user terminal computer, carry out according to following steps:
Step 1: check the audio frequency apparatus ability, corresponding audio frequency parameter is set;
Step 2: open recording or playback equipment;
Step 3: judge whether to record, if, then being judged as recording, execution in step four if not, then is judged as broadcast, changes and goes execution in step seven;
Step 4: for sound pick-up outfit is prepared data structure;
Step 5: begin the recording, and with deposit data in internal memory; Judge whether to send data to doctor's terminal computer, if, then send data Xiang doctor's terminal computer, the real-time display waveform that draws, and connection is interrupted; If not, judge then whether internal memory is full, if less than, then return execution in step five, continue deposit data in internal memory,, then to store data if full, empty the data buffer, discharge respective data structures again;
Step 6: judge whether recording finishes, if, then close sound device, if not, then return execution in step two;
Step 7: prepare data structure for playback equipment, obtain data from internal memory;
Step 8: play sound, discharge respective data structures;
Step 9: judge to play whether finish, if not, then return execution in step two, if then close sound device.
Described auxiliary diagnosis submodule, carry out according to following steps:
Step 1: from database, read heart sound data;
Step 2: this The data theory of wavelet transformation is carried out denoising, and the oscillogram after the denoising of drawing;
Step 3: on the time domain, the cardiechema signals after the denoising is carried out Hilbert-Huang transform, extract the hear sounds envelope;
Step 4: after obtaining temporal envelope, cardiechema signals is carried out staging treating, obtain the characteristic parameter of time-domain analysis;
Step 5: on the frequency domain, the cardiechema signals after the denoising is adopted the Welch analysis of spectrum, obtain the characteristic parameter of frequency-domain analysis;
Step 6:, obtain the auxiliary diagnosis result in conjunction with the characteristic parameter of time domain and frequency domain.
Described database submodule, carry out according to following steps:
Step 1: the doctor lands;
Step 2: retrieve user information, judge whether this user registers, if not, then close data source, finish visit; If then execution in step three;
Step 3: show online patient;
Step 4: inquire about the patient in database, judged whether this patient, if there is not this patient, then prompting makes mistakes, and returns execution in step three, if this patient is arranged, then successful inquiring shows patient information, adds patient's diagnostic result, upgrades patient's record;
Step 5: forward next patient to, return execution in step three.
Described hardware switching device shifter comprises triode and relay, and the height control level that described user terminal computer expert crosses parallel port output is connected with triode, and described triode is connected with the coil of relay; Described electronic auscultation device is connected with the normally closed contact of relay, and described voice Mike is connected with the normally opened contact of relay.
Beneficial effect of the present invention:
Remote medical treatment auscultation advisory system of the present invention utilizes Internet resources strange land transmission data, at the aspects such as objectivity of the promptness of auscultation, accuracy, signal bigger raising is arranged all compared with prior art, has benefited extensive patients, has optimized medical system.
The present invention helps promoting to family and community sanitary mechanism, as long as just can be moved our system by the place of the network coverage.Consider user group's complicacy on the software design, the conviction in line with friendly, convenient, understandable designs.
Unique distinction of the present invention is to realize the Network Transmission of telecommunication network auscultation and measured data, and by methods such as cardiechema signals processing, feature extractions, for patient provides preliminary diagnostic result, the realization patient is home-confined just can to carry out periodic health of heart inspection, in time finds and prevent disease; On the other hand, the comparison of auscultation and hear sounds waveform, convenient doctor observes out the unusual part of hear sounds, for doctor's further diagnosis provides objective reference frame; The third aspect has been set up the exclusive hear sounds archive database of user at aspects such as patient history file administration, preserves the each diagnosis information of user.
The present invention can realize auscultation consulting and the data transmission work in the LAN (Local Area Network) at present, so can be applicable in the scope of patient in community hospital and the community, the transmission quality of cardiechema signals has also been reached higher level.The cardiechema signals that adopts system of the present invention to obtain carries out the auxiliary diagnosis result and has accuracy more than 85%, the Diagnostic parameters that provides for the doctor, be to select to obtain under a plurality of heart physicians' suggestion, the present invention provides sizable help for the early stage pathological diagnosis of heart disease.
Description of drawings
Fig. 1 is that the system of remote medical treatment auscultation advisory system of the present invention forms structural representation;
Fig. 2 is the schematic block circuit diagram of hardware switching device shifter;
Fig. 3 is the circuit theory diagrams of hardware switching device shifter;
Fig. 4 is the software switching flow figure of hardware switching device shifter;
Fig. 5 is the procedure chart that both sides connect;
Fig. 6 is the process flow diagram of network service submodule;
Fig. 7 is the process flow diagram of real-time display sub-module;
Fig. 8 is the process flow diagram of database submodule;
Fig. 9 is the process flow diagram of auxiliary diagnosis submodule;
Figure 10 is a hear sounds temporal signatures synoptic diagram;
Figure 11 is the empirical modal decomposable process process flow diagram in the Hilbert-Huang transform;
Figure 12 is the operational flowchart of system of the present invention;
Figure 13 is the real-time display waveform figure of an embodiment;
Waveform display interface when Figure 14 is embodiment hear sounds of doctor's terminal plays;
Figure 15 is the system architecture synoptic diagram of remote medical treatment auscultation advisory system of the present invention;
Among the figure, 1-doctor's terminal computer, 2-user terminal computer, 3-hardware switching device shifter, 4-voice Mike, 5-electronic auscultation device.
Embodiment
The present invention is described further below in conjunction with accompanying drawing:
A kind of remote medical treatment auscultation advisory system as shown in Figure 1, comprises doctor's terminal computer, user terminal computer, electronic auscultation device, hardware switching device shifter and network,
Described doctor's terminal computer, it has voice Mike and camera, and has INTERFACE DESIGN submodule, network service submodule, real-time display sub-module, auxiliary diagnosis submodule, database submodule and help system submodule; This doctor's terminal computer can be finished from described network and receive voice data, and can play, realize data waveform, obtains the auxiliary diagnosis parameter;
Described user terminal computer, it has voice Mike and camera, and has INTERFACE DESIGN submodule, real-time display sub-module, network service submodule and help system submodule, and this user terminal computer can be sent to described network with described voice data;
Described electronic auscultation device is used to gather patient's heart sound data, and this electronic auscultation device is connected with the stethoscope interface that described hardware switches transposition;
Described hardware switching device shifter is used for the switching of voice and hear sounds;
Described network is used to connect described user terminal computer and described doctor's terminal computer, and can transmits described voice data.
As shown in Figure 2, described hardware switching device shifter comprises triode and relay, and the height control level that described user terminal computer expert crosses parallel port output is connected with triode, and described triode is connected with the coil of relay; Described electronic auscultation device is connected with the normally closed contact of relay, and described voice Mike is connected with the normally opened contact of relay.
As shown in Figure 3, the HRS2H-S-DC5V-N electromagnetic type relay that described relay adopts HKE company to produce, power supply VCC can receive supply circuit power supply on the computer by USB port, software is by parallel port output height control level, Ui is the control level by the output of PC parallel port, high level 4.2V, low level 0.2V; Voice Mike's input is connected on the normally opened contact of relay, and the input of electronic auscultation device is connected on the normally closed contact of relay.When software was exported 0.2V voltage (being low level) by the parallel port, C9012H202 model PNP silicone tube was in state of saturation, Uo=5V, and the normally opened contact of relay is in on-state, and normally closed contact is in off-state, signal is imported from voice Mike.When software was exported 4.2V voltage (being high level) by the parallel port, the PNP silicone tube was in cut-off state, Uo=0V, and the normally closed contact of relay is in on-state, and normally opened contact is in off-state, signal is imported from electronic auscultation device.
What the present invention adopted is the Masrter Elite series 5079-405 model electronic auscultation device of the U.S. big human relations company, and its principle of work is that sensor receives sound wave, is converted into electric signal, reduces sound to greatest extent and loses.Its built-in sensors adopts brand-new Piezo-sensor technology, has improved the authenticity of stethoscopic susceptibility and auscultatory sound greatly, and the highest specificity is amplified sound wave and reached 30 times, adopts this stethoscope to provide guarantee for obtaining high-quality cardiechema signals.
Software section of the present invention adopts modular design, the realization flow of setting forth each module of system of the present invention below respectively.
1. INTERFACE DESIGN submodule: the interface is divided into doctor's end and patient end, and both interfaces are identical substantially.The file of transmission, chat transmission, real-time video are wherein arranged, also have doctor and patient's information etc.On software, software is beautified, make it reach effect attractive in appearance, hommization.Mainly be that the button in the VC dialog box is replaced with two bitmaps, press and be late for, make it operation intuitively be arranged the user with different bitmaps.In addition, also changed the background of software, do-it-yourself a bitmap, with this background as software.
2. network service submodule, as shown in Figure 6, carry out according to following steps:
Step 1: obtain the RTC interface by CoCreateInstance (), determine communication capacity;
Step 2: select communication type and communication facilities, communication type and relevant device (video camera, microphone etc.), default configuration is to activate all communication types; If the participant of session energy share application, transmission instant message and audio/video conference, these communication types will be activated automatically so; If a certain participant does not support certain communication type, so all participants can not activate the type; Adjust communication facilities, first-class as microphone, shooting;
Step 3: initialize session, application program is with before other participants are connected, and it must handle the RTC incident in the session; In the communication of PC-to-PC, application program is caught media event, volume incident, instant message incident and session status and is changed incident;
Step 4: handle the RTC incident,, receive and handle the RTC incident and just become suitable easy in case register in the event handler IRTCEventNotification receiver; Create communication session, before in RTC, initiating a calling, must create and session of initialization, can import participant's IP address then and initiate a calling;
Step 5: may activate a session by an e-mail address or a telephone number, create communication session, handle the words incident that fails to be convened for lack of a quorum in real time, comprise that media event, volume incident, instant message incident and session status change incident;
Media event: handle media event and need obtain medium type, event type and reason, send message then to session window; Application program can use get_MediaType () to receive message from video, audio frequency, T120 and real-time transport protocol (rtp) incident;
The volume incident: produce the volume incident when the audio volume level of loudspeaker or microphone changes, application program can use get_Direction () function to obtain the audio frequency apparatus that changes; In case determined equipment, application program can obtain the attribute of equipment and handle to change, and application program can show the change of volume by the slider control, perhaps is shown to volume indicator of user;
Instant message incident: use IRTCMessagingEvent in the session participant, to transmit instant message; When a message event produced, application program must obtain session and event type, obtains the participant information in the associated session, so that message can be passed to a suitable side, event handler also can be handled the change of session status;
Session status changes incident: the processing procedure that session status changes incident is identical with other RTC incidents, and the change of session status comprises sets up a new audio/video session, perhaps notifies the instant message of an arrival of client;
Step 6: close a session, all application programs of moving T120 must be closed.The RTC client-side interface calls ShutDown () then, and finishes the process of closing session, finishes the real-time Communication for Power process.
In this part, can realize the function of instant character chat, voice and video chat and file transfer.Before this, need a patient to wait in line the doctor and respond, thereby set up the process that both sides connect.Software is realized with the mode of multithreading, does not disturb mutually between each function.Network service is based on the TCP mode, and the voice and video chat is based on the communication mode of the RTC API of Microsoft, can select suitable codec according to the ability and the bandwidth of communicating pair.
3. real-time display sub-module, as shown in Figure 7, carry out according to following steps:
Step 1: check the audio frequency apparatus ability, corresponding audio frequency parameter is set;
Step 2: use waveInOpen or waveOutOpen function to open recording or playback equipment;
Step 3: judge whether to record, if, then being judged as recording, execution in step four if not, then is judged as broadcast, changes and goes execution in step seven;
Step 4: for sound pick-up outfit is prepared data structure;
Step 5: begin the recording, and with deposit data in internal memory; Judge whether to send data to doctor's terminal computer, if, then send data Xiang doctor's terminal computer, the real-time display waveform that draws, and connection is interrupted; If not, judge then whether internal memory is full, if less than, then return execution in step five, continue deposit data in internal memory,, then to store data if full, empty the data buffer, discharge respective data structures again;
Step 6: judge whether recording finishes, if, then close sound device, if not, then return execution in step two;
Step 7: prepare data structure for playback equipment, obtain data from internal memory;
Step 8: play sound, discharge respective data structures;
Step 9: judge to play whether finish, if not, then return execution in step two, if then close sound device.
In this module, to be achieved as follows function, i.e. sound collection, broadcast and demonstration in real time.System adopts MCI (Media Control Interface) technology to realize hear sounds collection and playback, uses the voice data that the waveInStart function is recorded or the broadcast of waveOutWrite function records after data structure is ready to.Voice data leaves in the internal storage data piece, if the input core buffer is full, system can send MM_WIM_DATA message, in the processing function of this message, can handle voice data, realize the function of broadcast, storage and real-time rendering hear sounds waveform, empty the data buffer after disposing and add input queue again after finishing, discharge the internal storage location that makes recording and the use of play buffer content; After all tasks are finished, close corresponding apparatus.
4. data trousers module, as shown in Figure 8, carry out according to following steps:
Step 1: the doctor lands;
Step 2: retrieve user information, judge whether this user registers, if not, then close data source, finish visit; If then execution in step three;
Step 3: show online patient;
Step 4: inquire about the patient in database, judged whether this patient, if there is not this patient, then prompting makes mistakes, and returns execution in step three, if this patient is arranged, then successful inquiring shows patient information, adds patient's diagnostic result, upgrades patient's record;
Step 5: forward next patient to, return execution in step three.
Microsoft foundation class storehouse (Microsoft Foundation Classes, abbreviation MFC) operation to database mainly is exactly to connect (Open Database Connectivity by the open type data storehouse, be called for short ODBC) and activex data object (ActiveX Data Objects is called for short ADO).That adopt here is ODBC, because the great advantage of ODBC is exactly to handle all databases with uniform way, a lot of convenience have been brought, one does not rely on any data base management system (DBMS) (Database Management System based on the application program of ODBC to the operation of database, be called for short DBMS), not direct and DBMS comes into contacts with, and all database manipulations are finished by the ODBC driver of the DBMS of correspondence.That is to say that no matter be FoxPro, Access, MYSQL or oracle database, all available ODBC API conducts interviews.Moreover, ODBC uses the method for level to come management database, each layer in the database communication structure, to the place of dependency database product self-characteristic occurring, ODBC introduces a common interface solving potential inconsistency, thereby has solved the relative independentability based on the Database Systems application program well.
Use ODBC technology access and process database in this module, used database software is SQL2000.Before database is operated, at first need the log-on data source.Message reflections such as the field information of database and driver are in the registration table of system after finishing.When will use database in application program the time, application program can be finished operation to database according to information in the registration table, for example: browse, add, deletion, modification, Query Database record.Doctor's terminal has database of patient information, client terminal need import with database in when being complementary information, just can wait in line the doctor and confirm to connect.In doctor's terminal, the doctor needs to land Diagnostics Interfaces by number of the account and password, has a series of online patient's tabulations this moment, and the doctor can select a patient or input information inquiry patient arbitrarily.When diagnosis finishes, fill in conditions of patients, deposit diagnostic result and heart sound data in database, generate the diagnosis report of html format.
5. auxiliary diagnosis submodule, as shown in Figure 9, carry out according to following steps:
Step 1: from database, read heart sound data;
Step 2: this The data theory of wavelet transformation is carried out denoising, adopt 5 layers of wavelet decomposition here, wavelet basis is selected the db wavelet basis function for use, and maximin principle is selected threshold value, and the oscillogram after the denoising of drawing;
Step 3: on the time domain, the cardiechema signals after the denoising is carried out Hilbert-Huang transform, extract the hear sounds envelope; Wherein, rule of thumb mode is decomposed the form that signal decomposition is become each intrinsic mode function sum and the addition of residual error item, and selecting the signal after each mode is heavily purchased thus is analytic signal, tries to achieve the envelope that Hilbert-Huang transform obtains signal;
Step 4: after obtaining temporal envelope, cardiechema signals is carried out staging treating, obtain the height energy parameter of first heart sound S1, second heart sound S2; Adopt threshold method to choose the end points of hear sounds, and then, judge its concrete time limit according to the theory of medicine corresponding relation of S1 and S2;
Step 5: on the frequency domain, the cardiechema signals after the denoising is adopted the Welch analysis of spectrum, obtain the height energy parameter of S1, S2;
Step 6:, obtain the auxiliary diagnosis result in conjunction with the characteristic parameter of time domain and frequency domain.
The heart sound data signal that reads from database often comprises the faint noise that brings such as move of test environment, electromagnetic interference (EMI) and tested personnel's health, and it is quite necessary that signal is carried out denoising.It is better to go out the effect that the theory of wavelet transformation denoising handles hear sounds through a large amount of experimental summaries, and it is little influenced by the complicacy of hear sounds, and algorithm realizes that easily real-time is good.Analysis on Heart Sounds is handled two aspects of employing time-domain and frequency-domain, and in time domain was handled, purpose was the hear sounds characteristic parameter that finds in the time domain.Hear sounds temporal signatures synoptic diagram as shown in figure 10, the characteristic parameter of time-domain analysis is:
1. cardiac cycle: systole phase and total duration of diastole sum;
2. S1 time limit: first heart sound duration;
3. S2 time limit: second heart sound duration;
4. the ratio of first heart sound duration and second heart sound duration.
The characteristic parameter of the frequency-domain analysis that employing Welch analysis of spectrum obtains is:
1. low frequency energy;
2. intermediate frequency energy;
3. high-frequency energy;
4. maximum energy-density.
Empirical modal in the Hilbert-Huang transform decompose (Empirical Mode Decomposition, EMD) process, as shown in figure 11, this process purpose be seek intrinsic mode function (Intrinsic Mode Function, IMF).This method thinks that any one signal can be made of a series of simple non-sinusoidal functions, and these non-sinusoidal functions are exactly the IMF that will seek.IMF must satisfy 2 conditions:
(1) concerning whole time series, the number of extreme point and the number of zero crossing equate or differ 1;
(2) at place, any point, the average of maximal value envelope and minimum value envelope is zero.
Suppose that original signal is s (t), the concrete steps of s (t) being carried out Hilbert-Huang transform are as follows:
1. determine the extreme point of s (t), at first set when n=1 r
N-1(t)=and s (t), be the skin beginning that circulates for the first time;
2. set when k=1 h
K-1(t)=r
N-1(t), be the internal layer beginning that circulates for the first time; Connect maximum point and minimum point respectively with 3 spline interpolations, that operation circulation k=1 obtains is the coenvelope line x of original signal s (t)
1max(t) and lower envelope line x
1min(t);
3. obtain the average line m of coenvelope line and lower envelope line
k(t):
m
k(t)=[x
Kmax(t)+x
Kmin(t)]/2, use previous h
K-1(t) signal deducts average line m
k(t) get h
k(t), that is: h
k(t) for satisfy two signals that condition is separated of above-mentioned IMF from original signal;
If 4. h
k(t) do not satisfy two conditions, the then h of IMF
k(t) will repeat 2. 3. step as original signal, up to finding out qualified h
k(t), jump out interior loop;
5. make c
n(t)=h
k(t), then work as k=1, c
1(t) be the IMF that is asked, be called the first rank intrinsic mode function; Residual error r
1(t)=r
o(t)-c
1(t), i.e. r
n(t)=r
N-1(t)-c
n(t);
6. with r
N-1(t) regard new original signal as and repeat above step, until residual error r
n(t) content the meaning very little or r of the information in to being studied
nWhen (t) being monotonic quantity, then stop decomposable process.Decompose successively by this process:
s(t)＝r
1(t)+c
1(t)
r
1(t)＝r
2(t)+c
2(t)
r
n-1(t)＝r
n(t)+c
n(t)
As can be seen, the EMD process is that residual error is constantly separated, and obtains the process of intrinsic mode function.And along with increasing of IMF exponent number, c
k(t) frequency reduces gradually, can obtain required reconstruction signal to the intrinsic mode function summation of preserving.The reconstruction signal that obtains is carried out the envelope that Hilbert-Huang transform just can obtain cardiechema signals.Obtain behind the envelope hear sounds to be carried out segmentation, adopt threshold method to choose the end points of hear sounds, and then, judge its concrete time limit according to the theory of medicine corresponding relation of S1 and S2.On frequency domain, adopt the Welch analysis of spectrum among the Matlab, S1, the S2 that obtains its signal energy, signal high low-yield separately such as compares at parameter.These parameters will offer doctor's auxiliary diagnosis parameter as us, and the interface that outputs to doctor's terminal computer shows.
6. help system submodule, this module comprises two parts content, the one, the software manual help file adopts the HTMLHelp WorkShop software of Microsoft to write.But this software is only supported the importing of html file, so elder generation imports among the HTML Help WorkShop after writing html file with Dreamweaver again; The 2nd, the displaying at auscultation position, the pattern that adopts FLASH to play.
7. the software switching flow of hardware switching device shifter as shown in Figure 4, at first carries out the parallel port initialization, and install driver, judges whether initialization is successful, if unsuccessful, then provides initialization failure prompting; If success is then selected the current mode of operation that needs switching by the patient: electronic auscultation device inserts or voice Mike inserts.Its detailed process is as follows: judge whether to insert electronic auscultation device, if, then insert electronic auscultation device, if not, then insert voice Mike.
The operating process of system of the present invention, as shown in figure 12, at first the patient lands system of the present invention by the user terminal computer, and the IP address of input user profile and doctor's terminal computer transmit a request to doctor's terminal, requires to seek medical advice.Require to seek medical advice owing to have a plurality of patients this moment, therefore need wait in line, as shown in Figure 5.And at doctor's terminal computer, the doctor at first enters login interface, just can enter main interface after input number of the account and the password confirming identity.The doctor can select patient or input patient information inquiry patient arbitrarily.When the doctor confirms patient information and agrees to go to a doctor, connect.Patient and doctor can carry out online exchange by voice or literal, through after doctor's the interrogation, require auscultation, and the patient switches to cardiophony to voice at user terminal by the hardware switching device shifter; The online auscultation of doctor, the Real Time Observation wave form varies, and preserve heart sound data; The state of an illness is analyzed, diagnosed to the online observation heart sound data of doctor, waveform by the auxiliary diagnosis submodule, preserve case history; The doctor sends diagnostic result to the patient, finishes this patient's diagnosis, and the patient logs off, and continues the next patient diagnosis.
Claims (6)
1. a remote medical treatment auscultation advisory system is characterized in that, comprises doctor's terminal computer, user terminal computer, electronic auscultation device, hardware switching device shifter and network,
Described doctor's terminal computer, it has voice Mike and camera, and has INTERFACE DESIGN submodule, network service submodule, real-time display sub-module, auxiliary diagnosis submodule, database submodule and help system submodule; This doctor's terminal computer can be finished from described network and receive voice data, and can play, realize data waveform, obtains the auxiliary diagnosis parameter;
Described user terminal computer, it has voice Mike and camera, and has INTERFACE DESIGN submodule, real-time display sub-module, network service submodule and help system submodule, and this user terminal computer can be sent to described network with described voice data;
Described electronic auscultation device is used to gather patient's heart sound data, and this electronic auscultation device is connected with the stethoscope interface that described hardware switches transposition;
Described hardware switching device shifter is used for the switching of voice and hear sounds;
Described network is used to connect described user terminal computer and described doctor's terminal computer, and can transmits described voice data.
2. a kind of remote medical treatment auscultation advisory system according to claim 1 is characterized in that the network service submodule of described doctor's terminal computer and user terminal computer, carries out according to following steps:
Step 1: obtain the RTC interface, determine communication capacity;
Step 2: select communication type;
Step 3: select communication facilities;
Step 4: initialize session;
Step 5: handle the RTC incident;
Step 6: create communication session, handle the words incident that fails to be convened for lack of a quorum in real time, comprise that media event, volume incident, instant message incident, session status change incident;
Step 7: close session.
3. a kind of remote medical treatment auscultation advisory system according to claim 1 is characterized in that the real-time display sub-module of described doctor's terminal computer and user terminal computer, carries out according to following steps:
Step 1: check the audio frequency apparatus ability, corresponding audio frequency parameter is set;
Step 2: open recording or playback equipment;
Step 3: judge whether to record, if, then being judged as recording, execution in step four if not, then is judged as broadcast, changes and goes execution in step seven;
Step 4: for sound pick-up outfit is prepared data structure;
Step 5: begin the recording, and with deposit data in internal memory; Judge whether to send data to doctor's terminal computer, if, then send data Xiang doctor's terminal computer, the real-time display waveform that draws, and connection is interrupted; If not, judge then whether internal memory is full, if less than, then return execution in step five, continue deposit data in internal memory,, then to store data if full, empty the data buffer, discharge respective data structures again;
Step 6: judge whether recording finishes, if, then close sound device, if not, then return execution in step two;
Step 7: prepare data structure for playback equipment, obtain data from internal memory;
Step 8: play sound, discharge respective data structures;
Step 9: judge to play whether finish, if not, then return execution in step two, if then close sound device.
4. a kind of remote medical treatment auscultation advisory system according to claim 1 is characterized in that described auxiliary diagnosis submodule, carries out according to following steps:
Step 1: from database, read heart sound data;
Step 2: this The data theory of wavelet transformation is carried out denoising, and the oscillogram after the denoising of drawing;
Step 3: on the time domain, the cardiechema signals after the denoising is carried out Hilbert-Huang, extract the hear sounds envelope;
Step 4: after obtaining temporal envelope, cardiechema signals is carried out staging treating, obtain the characteristic parameter of time-domain analysis;
Step 5: on the frequency domain, the cardiechema signals after the denoising is adopted the Welch analysis of spectrum, obtain the characteristic parameter of frequency-domain analysis;
Step 6:, obtain the auxiliary diagnosis result in conjunction with the characteristic parameter of time domain and frequency domain.
5. a kind of remote medical treatment auscultation advisory system according to claim 1 is characterized in that described database submodule, carries out according to following steps:
Step 1: the doctor lands;
Step 2: retrieve user information, judge whether this user registers, if not, then close data source, finish visit; If then execution in step three;
Step 3: show online patient;
Step 4: inquire about the patient in database, judged whether this patient, if there is not this patient, then prompting makes mistakes, and returns execution in step three, if this patient is arranged, then successful inquiring shows patient information, adds patient's diagnostic result, upgrades patient's record;
Step 5: forward next patient to, return execution in step three.
6. a kind of remote medical treatment auscultation advisory system according to claim 1, it is characterized in that described hardware switching device shifter comprises triode and relay, the height control level that described user terminal computer expert crosses parallel port output is connected with triode, and described triode is connected with the coil of relay; Described electronic auscultation device is connected with the normally closed contact of relay, and described voice Mike is connected with the normally opened contact of relay.
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