SU682224A1 - Apparatus for controlling pulse rate - Google Patents

Description

one

The invention relates to medical technology and can be used in medicine and physiology for diagnostic purposes.

A device for controlling a pulse is known, which contains electrodes, an amplifier, a driver connected in series, and an indicator 1.

However, the known device does not provide for the registration of individual stages of the curve of adaptation, which excludes the use of this device for the purposes of individual dosing of the value of the muscular load.

The purpose of the invention is to determine the degree of adaptation of the organism to the amount of muscular load.

This is achieved by the fact that the device for controlling the pulse has a switch, two integrators, two dividers, a control circuit and a subtraction circuit, the output of the driver through the switch is connected to the integrator inputs, the outputs of which are connected to the corresponding dividers through the switch, the outputs of the dividers are connected to the circuit inputs subtraction, and the output of the latter is connected to the indicator and through the control circuit to the switch.

FIG. 1 given a block diagram of the device; in fig. 2 - graphically shown

2

the dependence function, reflecting the dynamics of the heart rate over time under conditions of physical stress.

The dynamics of the heart rate during physical work is characterized by the presence of adaptation stages, manifested in the form of a discrete increase in the pulse rate, and a temporary

the localization of these stages largely depends on the individual characteristics of the organism. The stages of adaptation are an objective criterion for the adaptation of the cardiovascular system to the physical

the load, and automatic recording of the moment of their achievement allows one to diagnose the optimal states of the body's working capacity at the individual level 2.

In the general case, the dynamics of the staging adaptation of an organism to a muscular load is reflected in the graph of the pulse rate versus time function (adjustment curve) shown in FIG. 2. In the case of

pulse rate measurements at regular intervals; N-sequence measurement number; F — pulse rate. The plot of the LV characterizes the occurrence of the optimal stage of adaptation, and the branch of the curve

to the right of point B - the development of the next

3

a stage characterized by a decrease in the functional capabilities and de-integration of the functions of the cardio-respiratory annarate of a given organism. Setting a zero frequency in the range (/ A-FB) means that this load value corresponds to the optimal level of functioning of the cardiovascular and respiratory systems of the idivid.

As can be seen pa FIG. 2, the angle f between the abscissa and the segment connecting the current ordinate / with the origin is reduced from measuring to measurement. Starting from point L, this angle increases, and, consequently, ig (fn Fi / Ni) increases, therefore the establishment of a zero frequency in the range can be fixed by changing the sign of the difference (igffi-tg ф l). For the initial sections of the F (N) function, the difference ( tgfi--1gfg-1). A change in the sign of the difference between the opposite of (tgfi-tgfg-l) 0 indicates that the organism has reached the adaptation stage.

The device contains electrodes 1 connected to the amplifier 2, the output of which is connected to the driver 3. The output of the driver 3 through the switch 4 is alternately connected to the integrators 5 and 6. The outputs of the integrators 5 and 6 through the switch 4 are connected to the inputs of dividers 7 and 8, respectively. Dividers 7 and 8 are connected to the subtraction circuit 9, which is preadjoint to determine the difference law coming from the dividers and form an enable signal for the indicator 10. The control circuit 11 connected to the switch 4 and the output of the subtraction circuit 9 serves as producing periodic time intervals zadapnoy duration during which the heart rate measurement is performed by connecting shaper 3 to odpomu of iptegratorov 5 and 6, and for generating command pulses for controlling the operation of the switch 4.

The device works as follows.

The electrocardiograms removed from the electrodes 1 pass through the amplifier 2, and are fed to the input of the imaging unit 3, in which they are converted into a sequence of pulses calibrated in duration and amplitude. The output of the generator 3 is cyclically connected to the input of one of the integrators 5 and 6 through the measurement time of the pulse frequency. The integrators 5 and 6 operate in a linear accumulation mode of pulses from the generator 3 and form voltages proportional to the number of these pulses during the measurement interval pulse rate, and, therefore, proportional tgfg. Thus, during the current i-ro measurement, one integrator is in the accumulation mode

four

pulses - the receiving integrator, and the other - in the mode of remembering the result of the previous one, the (i-1) -th null frequency measurement - the memory integrator. In the moment

the end of the next pulse frequency measurement interval to the switch 4 from the control circuit 11 receives a command voltage pulse. This impulse connects the outputs of the integrators 5 and 6 to the inputs of the corresponding dividers 7 and 8, the memory integrator voltage being divided by (t-1) times, and the receiving integrator voltage is i-times, where i is the current order dead measure

pulse rate.

Output voltages from dividers 7 and 8 are fed to inputs of subtraction circuit 9.

Under the conditions of execution (tg fg-tg fg l) 0

at the output of the subtraction circuit 9 but is

a signal that can be used to turn on the indicator 10, giving a command to reduce the intensity or stop the exercise. The control signal 11 is triggered from the same signal, completing the cycle of operation of the entire device by resetting it to its original state. If, after the next measurement of the pulse rate (tg fg-tg fg l) 0, then the command pulse of the control circuit

using switch 4, the voltage is reset from the memory integrator, the transfer of this integrator to the receive mode and transfer of the second integrator from the receive mode to the memory mode, as well as the switching of dividers 7 and 8 to the next division stage, and the division ratio heart rate measurement number. The device is switched from the initial state to the pulse rate measurement mode by switching on the control circuit of the 11 toggle switch.

The proposed device provides a definition of the degree of adaptation of the organism.

to the magnitude of the muscular load, which allows it to be used for the purpose of individual dosing of the magnitude of the muscular load.

Claims (2)

Invention Formula A device for controlling the pulse, containing electrodes, an amplifier, a driver, a sequential sequence, and an indicator, characterized in that, in order to determine the degree of adaptation of the organism to the muscular load, it has a switch, two integrators, two dividers, a control circuit and a subtraction scheme, the output of the driver through the switch is connected to the inputs of the integrators, the outputs of which through the switch are connected to the respective dividers, the outputs of the dividers are connected to the inputs of the circuit subtraction, and the output of the latter is connected to indicator and control circuit with a switch. Sources of information taken into account in the examination 1. USSR author's certificate No. 465185, cl. A 61B 5/02, 1973. 2. Sorokin, AP and others. Some aspects of the dosage of exercise and adaptation to it. In Proc .: Aspects of adaptation. Ed. A.P. Sorokina, Gorky, 1973, p. 28- 37.