SU381339A1 - IYESHK ---- - Google Patents

Description

one

A device for measuring the frequency and depth of breathing is known, comprising channels for measuring signals proportional to the frequency and depth of respiration, an integrator of heart activity signals, a scheme for matching respiratory and cardiac signals, and instruments for recording and indicating critical respiratory conditions of a patient.

To provide continuous contactless patient remote monitoring of the respiratory state, an ion sensor is installed in the device on the patient’s exhaled air path, made in the form of grounded and collecting electrodes, with a grid at the sensor inlet and an ion filter at the outlet, and a low-inertia electrometric amplifier connecting inputs of channels for measuring signals with a collecting electrode.

The drawing shows a block diagram of the device.

The device contains an ion sensor / installed on the path of air inhaled and exhaled by the patient. The sensor / is made in the form of collecting 2 and grounded 3 electrodes, covering the input of the grid sensor 4 and the ion filter 5 at the output. The collecting electrode 2 is connected with a low-inertia electrometric amplifier 6, the output of which

connected to two signal measurement channels.

The measurement channel of the signal proportional to the respiration frequency contains an amplifier 7, a pulse shaper 8, a frequency meter 9, a respiration rate indicator 10. A recorder is used to record the measured signals.

The channel for measuring the signal proportional to the depth of breathing contains amplifier 7, integrator 12, terminal amplifier 13 L and indicator 14 for the depth of breathing. The device contains a device 15 for indication of critical states of respiration, connected to the frequency of the power 9 and the final amplifier 13. The central grid of the non-filter 5 is connected to the power supply 16.

The device works as follows. Before the measurement, the ion sensor / is installed and facing the patient so that the air exhaled by the mouth and nose passes through it. The exhaled air contains aero- and hydro-ions, due to which a charge pulse is accumulated by electrostatic induction on the collecting electrode 2. The amplitude of the pulse is proportional to the sharpness of the expiration, and the duration of the imiuls is the expiration duration. The area of the pulse is proportional to the kolphestvo of exhaled air. Upon entry, the charge does not accumulate, which is ensured by the corresponding inclusion of the filter grid 5 to the power supply 16.

The potential accumulated at the collecting electrode 2 is supplied to the input of the electrometric amplifier 6. . The frequency meter 9 measures the pulse frequency, which is recorded by the indicator 10 and the chart recorder 11. If the frequency of the pulses becomes below the allowable frequency, the connected respiratory indicator 9 is connected to the frequency meter 9 to indicate critical respiratory conditions.

Through the breath depth measurement channel, a pulse is fed to amplifier 7, integrator 12, after which the amplitude of DC voltage, proportional to the area of the pulse, is fed to terminal amplifier 13, and from there to indicator 14 to the depth of breath and the recorder P. If the depth of breath is below acceptable, the device 15 indicating critical states of patient breathing is connected to the final amplifier 13.

Subject invention

A device for measuring the frequency and depth of breathing, containing channels for measuring signals proportional to the frequency and depth of breathing, instruments for recording and indicating critical patient respiratory conditions, characterized in that, in order to ensure continuous non-contact with the patient an ion sensor, made in the form of a grounded and collecting electrodes, is installed with a grid at the sensor C input of the ion filter at the output, and a low-inertial electrometric force is installed A cable connecting the inputs of the signal measurement channels with the collecting electrode.