SU762854A1 - Device for examining gastrointestinal tract - Google Patents

Description

The invention relates to the field of medical equipment, namely, devices for gastroenterological research by the method of sensing. five

A device for the study of the gastrointestinal tract, containing a multi-channel measuring probe and recorders [1],

A disadvantage of the known device Yu is the need for manual data processing and visual removal of information from recording devices, which increases the time and errors of research. 15

The aim of the invention is the automation of the research process.

This goal is achieved by the fact that the unit is connected in series connected block amplifiers, 20

A control and conversion unit, a digital computer, a recording device, and a multichannel measuring probe connected to the output of an amplifier unit, 25 one of the outputs of which is connected to recorders, and a calibrator connected to one of the outputs of the digital computer. Moreover, the amplifier unit is made in the form of three-

channel matching amplifiers, as well as a distributor, timer and key connected in series, May amplifiers and a temperature channel switch; the outputs of two-channel matching amplifiers are connected directly to the inputs of the scaling amplifiers, and the third through the temperature channels switch to one of the control inputs the distributor is connected. The control and conversion unit has a control circuit connected in series by a channel switch, a voltage-to-voltage converter, and a buffer register, an exchange register connected to the control circuit, and a time counter connected to the buffer register.

The invention is illustrated in the drawing, which shows a block diagram of a device for the study of the gastrointestinal tract.

The device contains a series-connected multichannel measuring probe 1, a block of 2 amplifiers, a block 3 of control and conversion, a digital computer (DVM) 4, which registers the set'Hg-l ³ 762854

Function 5. One of the outputs of block 2 of amplifiers is connected to recorders b, and a calibrator 7 is connected to one of the outputs of digital computer 4 ·. Moreover, block 2 of amplifiers is designed as three-channel matching amplifiers 8, distributor 9, timer 10, key 11, scaling amplifiers 12 and the switch 13 temperature channels, and the control and conversion unit 3 has a control circuit 14, a switch 15 channels, a voltage-code converter 16, a buffer register 17, an exchange register 18 and a time counter 19.

The device works as follows. *

The device measures, records, analyzes, and processes documents in automatic mode using the built-in mini-digital computer 4 physiological parameters simultaneously through 12 measuring channels from 4 ~ x zones of the gastrointestinal track-Τ ^ 'in the following measurement range:.

Acidity, pH unit 0-9

Intracavitary pressure, mm Hg 0-300

Those $ 4 temperature, ° С 35-41

Measurement error,% Not more than 5.

The abstraction of physiological parameters is carried out using a replaceable measuring probe 1 introduced into the gastrointestinal tract.

The probe is structurally made on the basis of a rubber tube IR-152. The probe includes twelve sensors of 3 types: temperature sensors 20 (4 pcs.), Pressure sensors 21 (4 pcs.), Acidity sensors 22 (4 pcs.)

Thermistors TM-2 were used as temperature sensors. Pressure sensors and acidity of the original development.

The sensors along the length of the probe are arranged in four groups so that when

In the introduction of the probe, the first group was located in the duodenum,

2nd and 3rd group - in the stomach, ...... *

fourth - at the end of the esophagus.

The probe length is 1700 mm, the outer diameter is 6 mm, the probes are produced in 4 versions, differing from each other by the distances between the groups of sensors. - ..... - ................ ....

'The probe also allows you to enter drugs' and take samples through catheters, the distal ends of which are located in the areas of the sensors. ·

'The connection of the sensors with the unit 2 is wired.

The signals from the sensors of the probe are fed to the matching amplifiers 8 DC Type 710 UD1, installed in each measuring channel. In matching amplifiers, the signals of the sensors are normalized, i.e., "lead.

are carried out to a single measuring scale selected in the range of 0-4 V.

After matching amplifiers, sensor signals through scaling amplifiers 12 are output to recorders .6 for graphical recording

⁵ and simultaneously arrive at block 3 for converting from analog form to 8-digit digital code and subsequent input into digital computer 4.

The temperature sensors on the recorders are recorded for recording one track, to which they are connected alternately by a switch of 13 temperature channels controlled from the distributor of 9 pulses. All other sensors have separate tracks for recording.

Scaling amplifiers 12 lead the normalized signal to a form convenient for reading information from up to 20 recorders.

For the timing of the recorded processes, time stamps are applied to the paper tapes of the recorders using a timer that is controlled by timer 10, which forms 1s, 10 sec, 1 min, and 30 min marks.

Unit 3 conversion and management performs the following functions:

conversion of physiological signals from analog to 8-bit binary code;

cyclic polling of pressure and acidity sensors with a frequency of 80 Hz, '

address polling of temperature sensors with a frequency determined by a temperature processing algorithm;

two-way byte exchange

between the digital computer and the recording device 5;

operation control of the registering device;

management of information transfer from sensors to digital computers. ·

The signals of the sensors in block 3 are fed to a switch of 15 channels, which provides alternate connection to the converter of 16 pressure and acidity sensors in cyclic mode with a frequency of 80 Hz and temperature sensors -'v addressable mode

50 polls.

The converter 16 operates on the principle of one-by-one weighing and outputs 8-bit code, which is generated by the address of the connected sensor. Conversion time 140 min. Code and

⁵ address through the buffer register 17 are removed in the digital computers, where they are analyzed and processed. Through register 17, the digital computer also reads the time code from time counter 19.

60 Through 8-bit register 18

exchange is a two-way exchange between the digital computer and the recording device 5, as the latter can be used electric typing machine (EPM) Sopzi! 5

762854

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-254, With the help of an EPM, a device allocates to a doctor the results of a patient's examination in the form of a machine card 23. The type, format, content of a machine card depend on the specific implementation of physiological information processing algorithms, in particular, the proposed device gives the doctor results of processing in the form of tables and graphs histogram type.

For the purposes of managing and organizing information exchange between the digital computer, unit 3, and recording device 5, nine commands from the digital computer command system and a number of service signals are also used, which are also generated in the digital computer. On their basis, built the control circuit block 3 and the device itself. In general, the device is controlled by hardware and software from a digital computer.

The work of the operator is to turn on, turn off and monitor the device during operation. The operator also performs calibration of the probe on the calibrator 7 before starting work.

Calibrator 7 provides installation and maintenance with an accuracy of 0.1 ° C of two temperature regimes at 36 ° C and 40 ° C ·, changing buffer solutions with washing the working chamber, the probe calibration time is not more than 15 minutes; access to temperature for 2-3 minutes

Thus, the proposed device provides automatic operation at all stages of the study, collecting physiological information, processing, analyzing and documenting it, which significantly improves the measurement accuracy, eliminates objective errors and reduces by 2-3 orders of time the processing, analysis and documentation research results.

Claims (3)

Claim 1. A device for studying the gastrointestinal tract, containing a multichannel measuring probe and recorders, is distinguished by the fact that, in order to automate the research process, sequentially connected amplifiers, a control and conversion unit, a digital computer, I register the ^first device, while the multi-channel measuring probe is connected to the output of the amplifier unit, one of the outputs of which is connected to the recorders, and connected to one of the outputs of the digital computer calibrator. 2. The device according to claim 1, characterized in that the block of amplifiers is made in the form of three 20 channel matching amplifiers, as well as a distributor connected in series, a timer and a key, scaling amplifiers and a switch of temperature channels, while 25 outputs, two-channel terminating amplifiers are connected to the inputs of the scaling amplifiers directly, and the third output is connected via a temperature channel switch, - and one of the control inputs of which ^{1.0 is} connected to the valve. 3. The device according to claim 1, characterized in that the control unit and the conversion has a scheme _ control, serially connected <n switch channels, voltage-code converter and buffer register, exchange register connected to the control circuit, and time counter connected to the register 40 buffer.