CN2754560Y

CN2754560Y - Electronic ECG stethoscope

Info

Publication number: CN2754560Y
Application number: CN 200420086387
Authority: CN
Inventors: 张效科; 刘毅; 吕呼生
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-16
Filing date: 2004-12-16
Publication date: 2006-02-01
Anticipated expiration: 2014-12-16

Abstract

The utility model relates to an electronic ECG stethoscope which belongs to the technical field of medical appliances. The utility model is mainly and technically characterized in that a guide pipe between a stethoscope head and an earplug bracket is provided with a battery box in which an electronic circuit is arranged, and the battery box is connected with float electrodes through electrode conducting wire; the upper side of the stethoscope head is provided with a display and a function switch, and the lower side is provided with fixed electrodes and a sound stethoscope head. The utility model has the advantages of simple structure, small size, low cost, portability, convenient operation and functions of auscultation and display. The utility model can intuitionally display the health condition of internal organs, has high sensitivity of detecting electrocardiosignals so that the diagnosis of disease is accurate and has a data output interface so that the utility model can be connected to a computer or a PDA to carry out more comprehensive data analysis.

Description

Electronics electrocardiogram stethoscope

One, technical field

This utility model relates to a kind of stethoscope, and specifically electronics electrocardiogram stethoscope belongs to technical field of medical instruments.

Two, background technology

At present, the employed stethoscope major part of diagnosis disease still generally adopts traditional acoustic conductance principle, it is more weak and be subjected to drawbacks such as noise and audition interference easily that these stethoscopes exist sound, monitoring heart and lung sounds is subjected to environment or artificial factor affecting bigger, the Error Diagnostics rate of disease is higher relatively, and this stethoscope does not have Presentation Function.The desk-top electrocardiograph of specialty belongs to highly sophisticated device, and complex structure and inconvenience are carried, and has limited the universality of using.

Existing its structure of electronic stethoscope with auscultation function and electrocardiogram Presentation Function is that electrode slice is fixed on the auscultation head, distance between the electrode slice has only several centimetres, the electrocardiosignal of electrode slice output is less than normal, be not easy to the collection and the identification of small-signal, particularly difficult " P " ripple that shows heart; The too small whole electric excitation signal waveform that is difficult to reflect heart of distance between the electrode slice in addition can not comprehensively reflect the health status of heart; The electrocardiosignal that electrocardiosignal that fixed electrode slice detects and professional desk-top electrocardiograph detect differs greatly, and comparability is less, has reduced its practical value.

Three, utility model content

The purpose of this utility model is big in order to solve complex structure and Error Diagnostics that existing stethoscope exists, there is above defective in its structural design and proposes a kind of new technical scheme, make stethoscope have auscultation and demonstration dual-use function, and the sensitivity that has improved ECG signal, the accuracy that diagnoses the illness improves greatly.

The technical scheme that the designing technique defective of its existence of solving this utility model is adopted is:

A kind of electronics electrocardiogram stethoscope, it is made up of earplug, earplug support, earplug support shell fragment, conduit and stethoscope head, Y shape conduit turnoff between stethoscope head and earplug support is provided with battery case, the battery case switch is housed on the battery case, on battery case, is connected to float electrode by electrode cable; LCD display and functional switch are installed above the described stethoscope head, are provided with fixed electrode and sound auscultation head below; Control circuit is housed in battery case, and described control circuit is made up of cpu circuit, display circuit, function switch circuit, auscultation circuit, ecg circuit and RS232 interface circuit.

Stethoscope head is connected by conduit in the Y shape conduit with battery case, is provided with to show and the earplug electrode cable that battery case is connected by two conduits with the earplug support on conduit.

On battery case, be provided with computer and PDA interface circuit.

Stethoscope head is connected with battery case with the show electrode lead by conduit, and electrode cable is located in the catheter tube.

Control circuit is to be formed by connecting by circuit by cpu circuit, display circuit, auscultation circuit, ecg circuit, RS232 interface circuit and function switch circuit, to be mike MIC and electrode P1, P2 with signal deliver to cpu circuit and be input to display circuit through amplification carries out waveform and show that another road of sound auscultation head enters left and right sides earplug by amplification by sound auscultation head with the heart, lung, intestinal sound.

The advantage that this utility model had is: simple in structure, volume is little, with low cost, portably use conveniently, existing auscultation function has Presentation Function again, can show the health status of internal organs intuitively, compares with existing electronic stethoscope that to have electrocardiosignal highly sensitive, diagnose the illness accurately, have also that data output interface can be connected to computer or PDA (personal digital assistant) carries out more fully data analysis.

Four, description of drawings

Accompanying drawing 1 is this utility model overall structure sketch map;

Accompanying drawing 2 is stethoscope head in this utility model accompanying drawing 1 (1) left side view sketch maps;

Accompanying drawing 3 is this utility model circuit theory diagrams.

Five, the specific embodiment

With earplug (17), earplug support (16), earplug support shell fragment (15) is by Y shape conduit (8,12) be connected with battery case (9), battery case is equipped with control circuit in (9), power supply also is connected with stethoscope head (1) with electrode cable by conduit (8) with battery case switch (10), be provided with light-emitting diode display (2) above the stethoscope head (1), display function switch (3), acoustic pattern functional switch (4) and electrocardiogram mode capabilities switch (5), be provided with fixed electrode (6) and sound auscultation head (7) below the stethoscope head (1), the mike MIC in the circuit just, the conduit (8) that is located on the battery case (9) is that gas is logical mutually for Y shape with conduit (12).Upward be connected with float electrode (14) at battery case (9) by electrode cable (13).

Functional switch (3,4,5) can be selected stethoscopic mode of operation, as shows different signal waveforms, data and start and close etc.Display (2) can show electrocardiographic wave, heart rate data.The effect of fixed electrode (6) and float electrode (14) is to pick up electrocardiosignal.Sound auscultation head (7) is to pick up acoustical signal.Conduit (8) is to connect stethoscope head (1) and battery case (9), and inner conductors also has the sound channel effect.Battery case (9) built-in control circuit and battery.Gauge tap (10) is used to change battery.RS232 interface circuit (23) is the interface that stethoscope is connected with outer computer.Conduit (12) provides earplug lead and sound channel.Electrode cable (13) connects float electrode (14) and control circuit.Earplug support (16) and earplug support shell fragment (15) work to support earplug.The effect of earplug (17) provides electro-acoustic output or conventional acoustic output.

The circuit working principle:

Cpu circuit comprises chip MSP430F149 and peripheral crystal oscillating circuit device capacitor C1, C2 and crystal CR by forming based on the circuit of chip MSP430F149.

Acoustical signal is finished by integrated circuit MAX9812 pretreatment after mike MIC picks up and is input to the input A1 of cpu circuit (18) chips U1 (MSP430F149), 12 ADC change-over circuits of input A1 inside are converted to 12 position digital signals and handle, and the via line that disposes can show on the display screen that shows display circuit (2) or output on the outer computer.

Electrocardiosignal is input to the AO input of cpu circuit (18) chips U1 (MSP430F149) after integrated circuit U5 (MAX4461) and U6 (MAX1320) handle in electrocardiogram circuit (22), 12 ADC change-over circuits through AO input inside are converted to 12 position digital signals and handle, and dispose to show on the display screen in the display circuit (19) or to output on the outer computer.

Functional switch in the stethoscope mode of operation (3,4,5) is P1.2, P1.3 and the P1.4 input that the status information of SW1, SW2 and SW3 is input to chip U1 (MSP430F149), after differentiating stethoscope is switched to corresponding work mode.

RS232 interface circuit (23) couples together the end TXD of chip U1 (MSP430F149) and the RS232 of RXD and outer computer, realizes the two-way communication of chip U1 (MSP430F149) and outer computer.

Auscultation circuit (21): acoustical signal is finished by integrated circuit MAX9812 pretreatment after mike MIC picks up, and one the tunnel outputs to cpu circuit (18) carries out further digitized processing, and one the tunnel delivers to left and right sides earplug after sound power amplifier MAX4410 amplifies.

Ecg circuit (22): electrocardiosignal outputs to chip U1 (MSP430F149) and carries out digitized processing after integrated circuit MAX4460 and MAX1320 processing.

Display circuit (19): display circuit (19) is the D0-D7 that is inserted chip U1 (MSP430F149) by the 8 position datawire D0-D7 of chip U2 (GS12864), the video data of receiving chip U1 (MSP430F149) output.The work of integrated circuit GS12864 is by P1.0, P1.1, RD and the WR control of chip U1 (MSP430F149).

Function switch circuit (20): switch selects circuit to be made up of SW1, SW2, SW3, R3, R4 and R5, the state of SW1, SW2 and SW3 inserts P1.0, P1.1, the P1.4 of chip U1 (MSP430F149), by chip U1 (MSP430F149) state of three switches is carried out judgment processing.

RS232 interface circuit (23): the RS232 circuit is coupled together the TXD of chip U1 (MSP430F149) and the RS232 of RXD and outer computer by integrated circuit U7 (MAX221), realizes the two-way communication of chip U1 (MSP430F149) and outer computer.

In diagnosis is used, stethoscope head (1) is placed on the cardia of human body, fixed electrode (6) closely contacts with human body with sound auscultation head (7), press display function switch (3) and start stethoscope work, press electrocardiogram mode capabilities switch (5) and select the electrocardiogram pattern, float electrode (14) is placed on the extremity of human body and with electrode cable (13) and is inserted on the battery case (9), LCD display (2) begins to show electrocardiographic wave and heart rate data.

Press display function switch (3) and start stethoscope work, by sound display mode functional switch (4) display mode (hear sounds, lungs sound, intestinal sound) that selects a sound, LCD display (2) begins to show sound waveform, and acoustical signal passes in the earplug (17) by conduit (12) and earplug support (16) simultaneously.

Conduit (8) is stethoscope head (1) is connected with battery case (9) and transmits the signal of telecommunication.

The RS232 interface of computer or PDA is connected the various signal datas that extract the stethoscope collection carries out rounded analysis with RS232 interface circuit (23) in the interface cover plate (11).

Promote battery case switch (10) and open battery case (9) replacing battery.

LCD liquid crystal display (2) shows information such as heart rate data, various sound waveform, electrocardiographic wave, sound (lung, intestinal) sound wave shape, figure scale information and battery capacity state.

Claims

1, a kind of electronics electrocardiogram stethoscope, it is made up of earplug (17), earplug support (16), earplug support shell fragment (15), conduit (8,12) and stethoscope head (1), it is characterized in that: Y shape conduit (8, the 12) turnoff between stethoscope head (1) and earplug support (16) is provided with battery case (9), battery case switch (10) is housed on the battery case (9), goes up at battery case (9) and be connected to float electrode (14) by electrode cable (13); LCD display (2) and functional switch (3,4,5) are installed above the described stethoscope head (1), are provided with fixed electrode (6) and sound auscultation head (7) below; In battery case (9) control circuit is housed, described control circuit is made up of cpu circuit (18), display circuit (19), function switch circuit (20), auscultation circuit (22), ecg circuit (22) and RS232 interface circuit (23).

2, a kind of electronics electrocardiogram stethoscope according to claim 1, it is characterized in that: stethoscope head (1) is connected by a conduit (8) in the Y shape conduit with battery case (9), on conduit (8,12), be provided with and show and the earplug electrode cable that battery case (9) is connected by two conduits (12) with earplug support (16).

3, a kind of electronics electrocardiogram stethoscope according to claim 1 is characterized in that: be provided with computer and PDA interface circuit (23) on battery case (9).

4, a kind of electronics electrocardiogram stethoscope according to claim 1 is characterized in that: stethoscope head (1) is connected with battery case (9) with the show electrode lead by conduit (8), and electrode cable is located in conduit (8, the 12) pipe.

5, a kind of electronics electrocardiogram stethoscope according to claim 1, it is characterized in that: control circuit is to be formed by connecting by circuit by cpu circuit (18), display circuit (19), auscultation circuit (21), ecg circuit (22), RS232 interface circuit (23) and function switch circuit (20), to be mike MIC and electrode P1, P2 with signal deliver to cpu circuit (18) and be input to display circuit (19) through amplification carries out waveform and show that another road of sound auscultation head (7) enters left and right sides earplug (17) by amplification by sound auscultation head (7) with the heart, lung, intestinal sound.