SU390443A1 - DEVICE FOR FLOW POLAROMETRIC - Google Patents

Description

one

The invention relates to the field of medicine, namely to devices for flow-through polarometric analysis.

Devices for flow-through polarimetric analysis are known that contain polarometric sensors, a flow velocity sensor for the biological fluid under study, secondary transducers, an indicator device and a computing device including operational amplifiers, adders, multipliers and an integrator with an analog-digital converter.

However, the known devices do not automatically measure the energy balance in the flow of the biological fluid flowed.

In order to provide automatic measurement of the energy balance in the flow of biological fluid in the proposed device, the input and output polarometric pH sensors are connected to the operational amplifiers of the computing device through the secondary converters and then to the input of the adder, whose output through the installed nonlinearity unit, for example, as a diode assembly, associated with a multiplier loaded on a second adder with a set potentiometer, the output of the second with mmatora connected via a second multiplier with ana2

logo-digital converter and a third factor with a sensor for the flow rate of biological fluid. The drawing shows the block diagram of the proposed device for flow-through polarometric analysis.

The instrument for flow-through polarometric analysis contains polarometric sensors including input sensors.

i (рНвх) and 2 (рСО2вх) and output sensors З (РНЕх) and 4 (рС02Еых), sensor 5 of the flow velocity of the biological fluid (perfusate), secondary converters 6, operational amplifiers 7, first adder 8 and second adder 9, first multiplier JO, the second multiplier //, the third multiplier 12, the fourth multiplier 3 and the fifth multiplier 14, the integrator 15 with the analog-digital converter 16, the nonlinearity blocks 17, the setting potentiometer 18, the decoder 19 and the indicator 20.

The device works as follows.

Known mathematical dependence for

The vitamins of the viability of the preserved IaLfOB are as follows:

D - D, -f 0.043 f Q.pCO ,,, - antlg (pH ,, - 6.3) X

rsOg ...

antlgApH df,

Where D is the current oxygen debt, DO is the initial oxygen debt, pCO2inx is the partial CO2 voltage in the perfusate at the inlet 5 of the organ. pCO2out - partial CO2 voltage in the perfusate at the outlet of the organ pHinh - partial voltage N Yu in the superfusate at the inlet of the organ, AHH - partial voltage H in the perfusate at the outlet of the organ, Q - number of perseusable perfusate per minute. During the operation of the device according to the block diagram, two channels are allocated: for the formation of ant log pH of CGROUTED AND FOR the formation of 0.043 (H 2 H 2 O 3) I-C. The signals from the input sensor 1 through the secondary converter 6 are fed to the nonlinearity block 17, the output of which is antlg (pHBx-6,3). The signal is then fed to the fifth factor 14 and the third factor ZO 12, multiplying the value obtained by the signals from the input 2 and speed sensor 5. In the second channel, the signal from the output sensor 3 is converted and fed to the second adder 9, where its difference 35 is formed with the signal from the input sensor /. The voltage corresponding to the APH entering the nonlinearity block 17 is converted into antIgApH. Simultaneously, the converted signals from sensors 2 and 4, arriving at fourth factor 13, are extracted as a ratio. Further, in the first multiplier / CONS 10, the product antlgApH is formed by this 45 20 25 40 difference. At the second adder 9, the resulting product is subtracted from one. The setpoint voltage (unit) is set with the setpoint potentiometer 18 from stabilized loading I. The output signals of the channels, ostun to the second factor 11, are converted to an integrand function in analog form. They are fed to an analog-to-digital converter 16, which converts this design into a digital code, and then to integrator 15, where integration from O to t occurs. The information is provided via the decoder 19 to the indicator device 20. Object of the Invention A device for flow-through polarimetric analysis containing null sensors, a flow velocity sensor of the biological fluid being studied, secondary transducers, a indicating device and a computing device including operational amplifiers, totalizers, multipliers and an integrator with an analog-to-digital converter, characterized in that, in order to provide an automatic measurement of the energy balance in the flow biological fluid, in it input and output polarimetric pH sensors - secondary transducers are connected to on-board amplifiers of the calculator device and further to the input of the adder, the output of which through an installed nonlinearity unit, for example, in the form of a diode assembly, is connected with a multiplier loaded on a second adder with a set potentiometer, the output of the second adder is connected via a second multiplier with an analog-to-digital converter and through a third multiplier a flow rate sensor biological fluid. IS i5 13 20 Q