CN2253636Y

CN2253636Y - Computer diagnose device for myocardial ischemia

Info

Publication number: CN2253636Y
Application number: CN 95227624
Authority: CN
Inventors: 许东
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-14
Filing date: 1995-12-14
Publication date: 1997-05-07
Anticipated expiration: 2005-12-14

Abstract

The utility model relates to an electrocardiosignal inspection device for early diagnosis of coronary heart disease for people having normal electrocardiograms. The utility model is composed of 12 conducting and connecting wires of an electrocardiogram, an electrocardiogram amplifier, a multifunctional isolation analogue-to-digital converter, a microcomputer, a displayer and a printer. The interior of the multifunctional isolation analogue-to-digital converter is provided with an electronic disk with power failure protection used for storing the sample driven program. Under the control of the software, the device can electrocardiosignal inspection without scar, cardiac load increase or danger for patients. The system has advanced and accurate diagnosis method, very low equipment purchasing expense and inspection expense. The utility model is suitable for large, middle and small hospitals.

Description

The myocardial ischemia computerized diagnostic unit

This utility model relates to a kind of heart disease diagnosis device, especially a kind of myocardial ischemia computerized diagnostic unit.

At present, whether the people with normal ECG is done further to check to diagnose its heart to exist the method for blood supply insufficiency to have two kinds: the one, use coronary arteriography, can obtain conclusion very accurately, be referred to as " goldstandard ".But when implementing radiography, need conduit is penetrated human epidermal, arrive cardia, the inspection of wound property is arranged and certain danger is arranged so be called by arteries.The 2nd, carry out treadmill test, promptly patient's heart is increased certain load, to check the blood supply situation of its heart under the different load degree by motion mode.The method has certain danger to advanced age, weakling, so be not suitable for all patients.

The purpose of this utility model is the device that design a kind ofly can not have wound to the person that has the normal ECG, do not increase the heart burden, non-hazardous myocardial blood supply state is diagnosed.

Technical solution of the present utility model is: a kind of myocardial ischemia computerized diagnostic unit, form by cardiac diagnosis lead-line (1), ecg amplifier (2), computer and keyboard (3), display (4), printer (5) and the multi-functional isolation A/D converter (6) that has an electric board (12), it is characterized in that: the address wire (IA0～IA12) all be connected on the address bus of static storage (U29) in the described electric board (12) and read-only memory (U30); The data wire of static storage U29 and read-only memory U30 (ID0～ID7) all be connected on the data/address bus; The high address line of static storage U29 and read-only memory U30 (PA13～16) all respectively with O2～O4 of control logic circuit U28, O6 holds connection, chip selection signal CS1, CS2 are respectively from O8, the O7 end of control logic circuit U28; The A of four NAND gate assembly U31 among the power down protection circuit G1, B door input connect host power supply VCC respectively and write memory signal IMEMW, and its outfan is connected to the WE end of static storage U29 and the O5 end of control logic circuit U28; Diode DD1 forward end connects host power supply VCC, and backward end connects the power input VCCE of static storage U29, also connects the positive pole of chargeable battery BT simultaneously through resistance R 3; DD2 oppositely connects host power supply VCC, and the sheet that forward connects capacitor C 34 and static storage U29 selects the CS2 end; The DD3 forward connects host power supply VCC, oppositely connects the power input VC of capacitor C 35 and four NAND gate assembly U31.

Elaborate below in conjunction with the embodiment in the accompanying drawing.

Fig. 1: myocardial ischemia computerized diagnostic unit block diagram;

Fig. 2: the multi-functional isolation A/D converter block diagram of myocardial ischemia computerized diagnostic unit;

Fig. 3: the electric board layout of myocardial ischemia computerized diagnostic unit.

In the accompanying drawing: (1) is ten two road cardiac diagnosis lead-lines, and (2) are ecg amplifiers, and (3) are mini-computer (containing keyboard), (4) be display, (5) are printers, and (6) are multi-functional isolation A/D converters, (7) be simulation multiplexer channel switch, (8) be isolated amplifier, (9) are photoisolators, and (10) are programmable amplifiers, (11) be A/D converter, (12) be electric board, (13) are control logic circuits, and (14) are DC voltage converters.

U28: control logic circuit (programmable gate array) GAL20V8

U29: static storage HM628128

U30: read-only memory 27020

U31: four NAND gate assembly 74HCT00

DD1, DD2, DD3 are crystal diode

BT: chargeable battery

R1～R5: resistor

C21, C34～C37: capacitor

G1: power down protection circuit.

Electric board is made up of static storage chip (U29) and read-only memory chip (U30) and power down protection circuit (G1).In memory chip U29, U30, there is system and moves necessary sampling driver.U29, U30 be all by address bus and data/address bus and main frame exchange message, and be connected with control logic circuit U28 by control line.Power down protection circuit G1 is that static storage (U29) provides power down protection, in case the losing of data.As power supply VCC (from main frame) when electricity is arranged; VCC and from U31A and the U31B NAND gate logical combination of memory write signal IMEMW in power down protection circuit G1 of main frame; produce the memory written allowance signal and deliver to the WE end of U29; it is become effectively; at this moment; if the sheet of U29 choosing end (CS1, CS2) is effectively, then can carry out write operation.Simultaneously, VCC provides power supply (VCCE) by diode DD1 to U29, and charges to standby chargeable battery BT by R3, also provides power supply VC by diode DD3 to the U31 assembly; In addition, VCC provides sheet to select the CS2 useful signal by divider resistance R1, R2 and capacitor C 34 to U29.After the VCC power down, battery BT provides power supply by R3 to the VCCE of U29 end, can not lose to guarantee institute's deposit data, and DD1 plays reverse shutoff effect; Simultaneously, it is invalid that originally effective WE and CS2 all become, and feasible reading and writing to memory all are blocked.In VVC power down, power up, the combination of U31A and U31B all makes memory write IMEMW and is blocked, and WE is invalid, thereby can't carry out write operation.More than see Fig. 3.

In the technical scheme of utility model,

The electrocardiosignal of human body is input to ecg amplifier (2) by ten two road cardiac diagnosis lead-lines (1).Ecg amplifier is input to multi-functional isolation A/D converter (6) after this ten two tunnel electrocardiosignal is amplified 800 times.

Simulation multiplexer channel switch (7) on the multi-functional isolation A/D converter is under the control of channel selecting signal, ten two road electrocardio input signals are sent into programmable amplifier (10) by isolated amplifier (8) successively, and its channel selecting signal is produced by the instruction of control logic circuit (13) according to computer (3).Programmable amplifier (10) can amplify electrocardiosignal by different multiples under software control again.Then, enter A/D converter (11) through the electrocardiosignal of amplifying again and carry out the conversion of the digital quantity of analog quantity.

Control logic circuit (13) produces the control signal to simulation multiplexer channel switch (7), programmable amplifier (10), A/D converter (11) and electric board (12) under the instruction control of computer.

Electrocardiosignal through conversion enters main frame, is handled by corresponding software, and compares, judges, and is unusual to determine whether, display (4) and printer (5) are used for showing, printing ecg wave form and diagnostic result.(more than see Fig. 1, Fig. 2).

The utility model has the following advantages:

1) it can diagnose early stage deficiency myocardial blood supply in having the crowd of normal ECG.

When 2) checking, patient does not have wound, does not need with motion mode heart of patient to be increased Load, thereby without any danger.

3) system's purchase commodity and patient's Laboratory Fee all are significantly less than the coronary angiography inspection.

Claims

1, a kind of myocardial ischemia computerized diagnostic unit, form by cardiac diagnosis lead-line (1), ecg amplifier (2), computer and keyboard (3), display (4), printer (5) and the multi-functional isolation A/D converter (6) that has an electric board (12), it is characterized in that: the address wire (IA0～IA12) all be connected on the address bus of static storage (U29) in the described electric board (12) and read-only memory (U30); The data wire of static storage U29 and read-only memory U30 (ID0～ID7) all be connected on the data/address bus; The high address line of static storage U29 and read-only memory U30 (PA13～16) all respectively with O2～O4 of control logic circuit U28, O6 holds connection, chip selection signal CS1, CS2 are respectively from O8, the O7 end of control logic circuit U28; The A of four NAND gate assembly U31 among the power down protection circuit G1, B door input connect host power supply VCC respectively and write memory signal IMEMW, and its outfan is connected to the WE end of static storage U29 and the O5 end of control logic circuit U28; Diode DD1 forward end connects host power supply VCC, and backward end connects the power input VCCE of static storage U29, also connects the positive pole of chargeable battery BT simultaneously through resistance R 3; DD2 oppositely connects host power supply VCC, and the sheet that forward connects capacitor C 34 and static storage U29 selects the CS2 end; The DD3 forward connects host power supply VCC, oppositely connects the power input VC of capacitor C 35 and four NAND gate assembly U31.