RU2284144C2 - Electrocardiogram attachment to personal computer - Google Patents

Abstract

FIELD: medical engineering.

SUBSTANCE: device has transducer unit, switchboard, noise equalizer, analog-to-digital converter, digital-to-analog converter, two USB interface units, communication channel and PC.

EFFECT: simplified design.

2 cl, 1 dwg

Description

The invention relates to medical equipment and can be used to monitor the human cardiovascular system.

Known small portable cardiograph [1], containing a block of electrodes of standard leads, a switch, a differential amplifier, a block for the allocation of a variable component, an analog-to-digital converter (ADC), a microprocessor controller, a liquid crystal display and providing blocks. The disadvantage of this device is the design complexity.

A known method of creating biological feedback for correcting cardiac activity and a device for its implementation [2], comprising a measuring and transmitting unit, including electrodes for removing biopotentials, amplifiers, a switch, an ADC, an encoder, an electromagnetic signal transmitter, an electromagnetic signal receiver, a decoder, a block feedback from the audio monitor and a processing complex, including an electromagnetic signal receiver, a computer and an electromagnetic signal transmitter. The disadvantage of this apparatus is the complexity of the design.

The closest in technical essence is a human operator monitoring system [3], which contains sensors of biological signals, a common electrode and common-mode suppression, a bioelectric signal multiplexer, a thermoelectric signal multiplexer, a normalizer amplifier, an ADC of electrobiological signals, a digital-to-analog converter (DAC) of zero correction , ADC of thermoelectric signals, code-voltage converter, control controller, microprogram memory block, random access memory GUSTs, biofeedback processor, DAC incentives and tests, normalizer and stimulus tests, the switching unit paraphase signal, serial communication interface, human-operator wireless transceiver, a wireless transceiver device of the computer, a central computer. The disadvantage of this apparatus is the increased complexity of the design.

The objective of the invention is to simplify the design of the console by eliminating microprocessor devices.

The solution to the problem is achieved in that in the ECG prefix to a personal computer containing a series-connected sensor block, a switch, an interference compensator and an analog-to-digital converter, a digital-to-analog converter, the output of which is connected to another input of the interference compensator, a series-connected interface, a communication channel made in in the form of a radio channel, and computers, computers are made in the form of a personal computer, the interface is made in the form of a USB interface module, the input of which is connected to the output of an analog-to-digital converter the indicator, the output is connected to the input of the digital-to-analog converter, the control output is connected to the corresponding inputs of the switch and the interference compensator, and the output-input is connected to the corresponding input-output of the communication channel; introduced another USB interface module, the input-output of which is connected to the output-input of the communication channel, and the output-input is connected to the input-output of a personal computer, and the interference compensator is made with the possibility of additionally compensating for network interference, and the sensor unit is made in the form of a set of sensors, each of which consists of a biopotential removal electrode combined with an amplifier, and is configured to install standard cardiographic leads in appropriate places; as well as the fact that the communication channel can be made wired according to the USB standard.

The technical result consists in simplifying the design of the console.

The drawing shows a structural diagram of a device.

The ECG prefix contains a sensor unit 1, a switch 2, an interference compensator 3, an ADC 4, a USB interface module 5, a communication channel 6, another USB interface module 7, a personal computer 8, and a DAC 9.

ECG prefix works as follows. From the output of the sensor unit 1, the biopotentials obtained at the electrodes and amplified come through switch 2, interference canceller 3, ADC 4, USB interface module 5, communication channel 6 and another USB interface module 7 on PC 8, in which they are processed using application software and in the necessary visual representation are displayed on the computer monitor. Due to the fact that the USB data transfer is high-speed, the PC provides not only the specified data processing, but also the generation of DC compensation signals and network noise, as well as control signals of the switch 2 and interference canceller 3 and their transmission via the USB interface module 7, channel 6 communication and USB interface module 5 to the corresponding blocks. Therefore, microprocessor devices are not used in the ECG prefix, which greatly simplifies the design.

An ECG prefix can be made of standard modules and on an accessible elemental base. The constructive implementation of a number of blocks may coincide or include designs of the same functional purpose of the prototype and analogues. For example, the design of the following blocks may coincide with the blocks of the prototype: 2 s 4, 3 s 6, 4 s 7, 9 s 8 [3]; the design of block 1 - with the design of the subsystem of blocks 1-3 analogue [2]. Blocks 5 and 7 can be made on the basis of FT 245 AM (FT 8 U 245 AM) microcircuits [4], and block 7 can be built into a PC, and on some PC models there is a USB interface input-output. The implementation of the blocks is determined by their functional purpose and is known or obvious from the prior art in the applicable time and frequency ranges.

Information sources

1. Patent No. 2093068 (RU). Cardiograph / F.A. Glezer et al. // BI. 10.20.1997.

2. Patent No. 2118117 (RU). A method of creating biological feedback for the correction of cardiac activity and a device for its implementation / L.I. Titomir and others // BI. 08/27/1998.

3. Patent No. 2201130 (RU). The monitoring system of a human operator / I.M. Borodyansky et al. // BI. 03/27/2003.

4. Lysenko A. et al. Interface converters on FT8U232AM, FT8U245 AM microcircuits. Radio, No. 6-7, 2002.

Claims (2)

1. An ECG set-top box for a personal computer, comprising series-connected sensor block, a switch, an interference compensator and an analog-to-digital converter, a digital-to-analog converter, the output of which is connected to another input of the interference canceller, an interface, a communication channel, and a computer, characterized in that the interference canceller made with the possibility of additional compensation of network interference, the communication channel is made in the form of a radio channel, the computer is made in the form of a personal computer with the possibility of formation and transmission to the communication channel for the shields of the digital-to-analog converter, switch, and the interference compensator of the corresponding information and control signals, the interface is made in the form of a USB interface module, the input of which is connected to the output of the analog-to-digital converter, the output is connected to the input of the digital-to-analog converter, the control output is connected to the corresponding inputs of the switch and the noise compensator, and the output-input is connected to the corresponding input-output of the communication channel; introduced another USB interface module, the input-output of which is connected to the output-input of the communication channel, and the output-input is connected to the input-output of a personal computer. 2. The ECG prefix according to claim 1, characterized in that the communication channel is wired according to the USB standard.