RU170360U1 - Apgar timer module - Google Patents

Abstract

The inventive apgar timer module relates to medical equipment for use in the departments of newborns of maternity hospitals and is designed to assess the condition of the newborn on the Apgar scale, can be used in medicine to generate sound signals at predetermined time intervals after the birth of the child in order to control the time for examination of the newborn and another assessment of its condition. The apgar timer module contains a housing consisting of a front part 1 and a housing base 10, the back of which is provided with a fastener Niemi for fixing the module on the rails. On the front part 1 of the housing there is a window 2 of a liquid crystal indicator (LCD) 11 and four windows 3 for LED indicators 12, three of which are located in the immediate vicinity of the corresponding controls - on / off buttons 4, mechanical ventilation buttons - IVL 5 and buttons Indirect cardiac massage - NMS 6, and near the fourth window of the LED indicator 12 there is a graphic sign 9, indicating the state of charge of the power supply. On the front side of the case there is a cover for access to the power supply, which is represented by two AA batteries. Buttons 7 and 8 with printed graphic signs (<) and (>) are used to decrease or increase the frequency or volume of sound signals generation. A printed circuit board 13 with radio elements is fixed to the housing base on supporting elements through fastening elements 17, on which LCDs 11, LED indicators 12, microcontroller 14, sound emitter 15 are electrically connected to each other and to the power supply. Sound emitter 15 executes commands to generate the main sound signal and sound signals of artificial lung ventilation and indirect heart massage, which have different frequency. The controls, represented by buttons 4, 5, 6, 7, 8, are made in the form of a flexible (film) keyboard, which is attached to the front part 1 of the housing and is electrically connected to the printed circuit board 13 with radio elements via a cable 16. Technical result - enhanced functionality apgar timer module. 6 c.p. f-ly, 3 ill.

Description

The utility model relates to medical equipment for use in the departments of newborn maternity hospitals and is designed to assess the condition of the newborn on the Apgar scale; it can be used in medicine to generate sound signals at predetermined time intervals after the birth of a child in order to control time for examination of the newborn and another assessment his condition.

According to the International Consensus on Resuscitation of Newborns (2000), the Apgar scale is a generally accepted system for quickly assessing the condition of a newborn by five criteria, which include an assessment of respiratory activity and heart rate. The Apgar timer is included at the time of birth of the newborn for a clear registration of the elapsed time from the moment of birth and estimates on the Apgar scale. The measures that a neonatologist uses to help a newborn have two main goals - the restoration of adequate breathing and a heartbeat. In cases where the newborn is not rated high enough (less than 7 points), he is observed further, continuing to give points every 5 minutes, i.e. at the end of the 10th, 15th or 20th minute.

Cardiopulmonary resuscitation is vital when the heartbeat or breathing stops. Within a few minutes after a child’s cardiac arrest, brain damage and death may occur.

Cardiopulmonary resuscitation (hereinafter - CPR) is an emergency medical procedure aimed at restoring the body's vital functions and removing it from the state of clinical death. CPR includes indirect cardiac massage (NMS) and mechanical ventilation (mechanical ventilation). It is necessary to start the victim's CPR as early as possible - the result directly depends on the time of the start of resuscitation and the adequacy of the action. With every minute of inaction, the chance of survival is reduced by 7-10%. Lack of independent or artificial blood circulation for more than 5 minutes means the onset of irreversible brain damage and, as a result, biological death. The main parameters of CPR are the frequency, depth of compression, their quantitative ratio with the inhalation of mechanical ventilation. To all this, you need to adhere to a certain sequence of resuscitation, constantly count the number of compressions and maintain the ratio of compressions / artificial inspirations into the lungs of the newborn. Thus, the use of a metronome optimizes the rate of chest compression during cardiopulmonary resuscitation.

A device for recording data on the Apgar scale obtained during the birth of a newborn, which is a card or other storage media with information about the condition of the newborn, recorded on them using various means (patent CN101934677, 2011).

The known device provides only obtaining information about the physical condition of the newborn in the first minutes of his life, but cannot be used as a timer to assess the condition of the newborn on the Apgar scale.

Known apgar timer, which is an emitter located in the housing, which after a predetermined time interval generates sound signals (TU 1-692-2-817.000TU-91 Apgar timer AT).

The known device has small functionality, especially for determining the condition of newborns with pathologies.

Known devices when the timer is built into the breathing monitor during mechanical ventilation. In addition to the timer, the device includes a sensor, a respiratory detector, light indication blocks, an audio signal emitter connected to an amplifier, generators with frequency dividers that are connected to a timer (patent RU 2005410,1994).

The known device does not allow its use for the purpose of determining the state of a newborn on the Apgar scale, because it is intended only for ventilator events, i.e. The known device has limited functionality.

Closest to the proposed is a multifunctional apgar timer, which contains a signal collection device, an information input module, a central data processing unit and one group of single output devices, in which the signal collection device at least comprises a device for collecting a heart rhythm signal or a combination of more than one of the collecting devices, including a detecting device with body temperature data, a device for monitoring blood pressure and gas analysis of blood, a cardiac device rhythm the information input module is designed to enter information about newborns: about parameters of heart rate, respiration, reaction to irritants, skin color and muscle tone in newborns; the central data processing unit receives input information from the device for collecting signals and the information input module and outputs the processed information through a group of individual output devices for printing or outputs the processing result to the central processing unit; the output ends of the signal collection device and the information input module are connected to the input end of the central data processing unit, and the end of the output control of the central processor is connected to the input ports of the device output unit (CN202277388, 2012).

The known device performs automatic scoring on the Apgar scale, replacing the subjective rating and thereby increasing the accuracy of the assessment in accordance with the generally accepted standard. However, the known device is difficult to manufacture and is a complex of various devices connected to each other, each of which has its own functionality. As practice shows, the most relevant is the apgar timer module, which can be used on its own or in combination with other special equipment for rehabilitation, intensive care and newborn care, in particular, complete with mechanical ventilation devices and other newborn resuscitation systems, which neonatology rooms are equipped.

A technical problem is the creation of an apgar timer module, which is suitable for primary use to determine the condition of a newborn using the Apgar system by assessing at certain periods of time, and can also be used as a metronome for resuscitation in cardiopulmonary care resuscitation of newborns with pathologies.

The technical result is an extension of the functionality of the apgar timer module.

The technical problem is solved by declaring an apgar timer module containing a power supply unit and a printed circuit board with radio elements, on which a microcontroller, liquid crystal and LED indicators, a sound emitter are mounted, which are electrically connected to each other and to the power supply, on the front the side of the housing contains controls that are electrically connected to the printed circuit board, windows are made above the LCD and LED indicators on the front side of the housing, micro the controller is configured to interact with controls, liquid crystal and LED indicators and a sound emitter, which executes commands to generate sounds after predetermined time periods, while the sound emitter executes commands to generate a main sound signal and sound signals of artificial lung ventilation and indirect heart massage, having different frequency.

On the back of the case there is a mount for fixing the case to the holder of an external device, for example, to roof rails or a flexible bracket. On the front side of the case there is a cover for access to the power supply for the purpose of replacing them or other maintenance.

The controls are made in the form of a flexible (film) keyboard with five buttons that bear informational signs and signs indicating the operation modes of the apgar timer module, namely the on / off button and the module operation settings, the decrease (<) button and the increase button ( >) to change the discreteness or volume of the sound signal, the ventilator button (for turning on or off and setting the mode of artificial ventilation) and the NMS button (for turning on or off and setting the mode of indirect heart massage). The electrical connection of the flexible keyboard to the printed circuit board is represented by a loop.

The electrical connection is represented by a power circuit implemented by conductive wires, electrical contacts, conductive paths on a printed circuit board and other known elements of electrical circuits.

The liquid crystal indicator (LCD) has four seven-segment familiarity. LCD is designed to display numerical information depending on the mode of operation.

LED indicators are designed to display information about the operation mode of the apgar timer module and are installed in an amount of 4 pieces above the on / off, ventilation and NMS buttons, and the last LED indicator is an indicator of the discharge of the power supply.

The sound emitter is designed to supply three types of sound signals depending on the specified operating mode of the apgar timer module and have different tonality.

In particular, the sound emitter executes commands to generate the following signals:

- the main sound signal lasting 1.5 seconds, the formation of the signal at 1, 5, 10, 20, 30, 40, 50 minutes of operation of the Module. When the module is turned off, the generation of the main signal stops;

- a signal of a metronome of artificial lung ventilation (IVL) lasting 0.2 seconds, the signal frequency is generated by the Module settings in the range from 20 to 80 times per minute. The basic value of the frequency is 50 times per minute;

- a signal of a lung metronome of indirect cardiac massage (NMS) lasting 0.07 seconds. The tone of the signal of the metronome of the lungs of indirect heart massage (NMS) differs from the tone of the signal of the metronome of mechanical ventilation.

The microcontroller performs the function of the control system of the apgar timer module, generating control signals for the LCD, LED indicators and sound emitter.

The microcontroller is equipped with a program that is recorded in its flash memory, and performs the following functions:

- counts astronomical time (current time);

- in the "counting" mode, the time is counted down with a discretion of 1 second from 00:00 to 59:59 with the issuance of a command to give sound signals at 1, 5, 10, 20, 30, 40, 50 minutes. Moments of sound signals are used by medical personnel to assess the condition of the baby and to perform medical procedures;

- in the "metronome IVL" mode generates an audio signal with a given frequency (preferably from 30 to 80 per minute), which is designed to synchronize the actions of medical personnel when performing artificial ventilation of the patient's lungs;

- in the "metronome NMS" mode, it generates an audio signal with a given frequency (Fivl * 4), which is designed to synchronize the actions of medical personnel when performing indirect heart massage;

- provides electrical control signals to the LCD;

- supplies electrical control signals to LED indicators;

- reads electrical signals the state of the keyboard buttons by evaluating the electrical potential at the contacts of the buttons relative to the potential of the GND circuit. When the button is pressed, the potential becomes equal to the level of logical 0. When the button is released, the potential is equal to the level of the logical unit;

- estimates the value of the voltage from the batteries and, if it is reduced, lights up the LED indicator, indicating a decrease in the voltage of the power supply;

- controls the operation of a step-up power source, which is part of the power circuit and is designed to power a sound emitter with a voltage of 3.3V.

The ventilation and NMS metronomes are synchronized with each other, namely, 3 NMS signals are fed between two successive ventilation signals.

The frequency of generating information signals of indirect cardiac massage depends on the frequency of generation of information signals of artificial lung ventilation in a ratio of 3: 1, i.e. 3 compressions (NMS) 1 breath (mechanical ventilation).

The generation of the metronome signals of indirect heart massage or artificial lung ventilation is triggered when the module controls are exposed to the corresponding buttons and does not depend on the operating mode in which the module is located.

The power supply is represented by batteries, for example, two AA batteries.

The inventive apgar timer module provides enhanced functionality through the implementation of the metronome function for cardiopulmonary resuscitation, which allows using the periodic sound signals of different tones to synchronize the work of medical personnel during resuscitation. At the same time, the inventive apgar timer module performs the main function - it has the function of saving the real time of birth and the end of resuscitation, which is stored in the memory of the microcontroller and displayed on the LCD.

The utility model formula is presented without highlighting the restrictive part for a better understanding of the technical nature of the claimed device.

The inventive device is illustrated by the following figures.

In FIG. 1 shows the appearance of the device.

In FIG. 2 shows a structural diagram of the device.

In FIG. Figure 3 shows an example of the generation of the main signal, the metronome of mechanical ventilation, and the metronome of indirect heart massage.

The apgar timer module comprises a housing consisting of a front part 1 and a housing base 10, the back of which is provided with a fastener for fixing the module to rails (not shown). On the front part 1 of the housing there is a window 2 of a liquid crystal indicator (LCD) 11 and four windows 3 for LED indicators 12, three of which are located in the immediate vicinity of the corresponding controls - on / off buttons 4, IVL buttons 5 and NMS buttons 6, and near the fourth window of the LED indicator 12 is placed a graphic sign 9, indicating the state of charge of the power supply. On the front side of the case there is a cover (not shown) for access to the power supply, which is represented by two AA batteries (not shown). Buttons 7 and 8 with printed graphic signs (<) and (>) are used to decrease or increase the frequency or volume of sound signals generation. A printed circuit board 13 with radio elements is fixed to the housing base on the supporting elements 17 via fasteners 17, on which the LCDs 11, LED indicators 12, microcontroller 14, sound emitter 15 are electrically connected to each other and to a power supply unit (not shown). The controls, represented by buttons 4, 5, 6, 7, 8, are made in the form of a flexible (film) keyboard, which is attached to the front part 1 of the case and is electrically connected to the printed circuit board 13 with radio elements by means of a loop 16.

The operation of the apgar timer module is as follows. The modes are switched on and adjusted by means of button 4. The volume of sound signals is set in the range from 30 dB to 60 dB and can be changed by buttons 7 and 8 from the minimum to the maximum value discretely for 5 clicks on the corresponding button. The microcontroller 14 is programmed to issue commands to the sound emitter 15 to generate three kinds of signals. The main signal is generated with a duration of 1.5 seconds; Signal formation is carried out at 1, 5, 10, 20, 30, 40, 50 minutes of module operation. When the module is turned off, the generation of the main signal stops. The operation indication in the main signal generation mode is carried out by means of the LED indicator 12 and visualized through the corresponding window 3 located on the front part 1 of the housing. The module is equipped with a function of automatic shutdown when the time value reaches 59 minutes 59 seconds, if during this time there was no forced stop of the count (end of resuscitation actions). Upon shutdown (forced or automatic), the module displays the current countdown time for at least 5 seconds, after which it generates a module shutdown signal and goes into sleep mode.

The module visually displays time. Indication is implemented by means of LCD 11 and is displayed in window 2 as large, clearly distinguishable, contrasting numbers. Number of familiarity - 2 digital groups (from 00 to 99), separated by a colon (Format: 88:88).

When the (IVL) 5 button is pressed, the metronome of artificial lung ventilation mode with a duration of 0.2 seconds is turned on, the signal frequency is generated by the module settings in the range from 20 to 80 times per minute. The base frequency value is set 50 times per minute.

When you press the button (NMS) 6, the metronome mode of indirect heart massage lasts 0.07 seconds. The tone of the indirect heart massage metronome signal differs from the tone of the artificial lung ventilation metronome signal.

The module indicates the above modes through the corresponding LED indicators 12, visualization is carried out through the corresponding windows 3.

The frequency of generation of the signals of the metronome of artificial ventilation of the lungs is carried out through buttons 7 and 8 discretely with step 1. The module displays the set frequency of generation of sound signals of the metronome and generates a signal of the corresponding frequency.

The frequency of generating information signals of indirect cardiac massage depends on the frequency of generation of information signals of artificial lung ventilation in a ratio of 3: 1, i.e. 3 compressions (NMS) 1 breath (mechanical ventilation). An example of the generation of these signals is shown in Fig.3.

With joint cardiopulmonary resuscitation, the signals for mechanical ventilation and NMS are synchronized with each other.

The module stores in the memory of the microcontroller 14 and displays in window 2 the last time the end of resuscitation, i.e. the time of the last forced shutdown of the module, or the time of automatic shutdown of the module.

The display of real time, the time of the last start of the module and the end time of resuscitation is available only when the apgar timer module is not in the countdown mode.

After activating the real-time display, the time of the last start of the module or the time of the end of resuscitation, the corresponding time is displayed in window 2 for at least 3 seconds, and after that the module switches to the mode in which it was before the display of the specified time.

The discharge indication of the power supply unit is carried out by means of the corresponding LED indicator 12 and is visualized in window 3 on the front part 1 of the housing. The inventive device has small overall dimensions - not more than 150 × 100 × 70 mm (W × H × D) and weight not more than 0.6 kg (together with power supplies). The inventive apgar timer module allows you to replace the power supply without losing the installed information (real time, frequency of generation of the signals of the metronome of indirect heart massage, frequency of generation of the signals of the metronome of artificial ventilation, frequency coefficient of the signals of artificial ventilation, real time, last time the module was started, time end of resuscitation) for at least 2 minutes. The presence in the inventive module of the apgar timer of additional functions of ventilator and NMS metronomes significantly expands the functionality and improves the efficiency of cardiopulmonary resuscitation of newborns with pathology.

Claims (7)

1. The apgar timer module, comprising a printed circuit board with radio elements and a power supply unit mounted on the printed circuit board, a microcontroller, a liquid crystal and LED indicators, an audio emitter, which are electrically connected to each other and to the power supply, the elements are placed on the front side of the case controls that are electrically connected to the printed circuit board by a loop, windows are made above the liquid crystal and LED indicators on the front side of the case, the microcontroller is made with the ability to interact with controls, liquid crystal and LED indicators and a sound emitter, which executes commands to generate sounds after predetermined periods of time, while the sound emitter executes commands to generate the main sound signal and sound signals of artificial ventilation of the lungs and indirect heart massage, which have different periodicity. 2. The apgar timer module according to claim 1, characterized in that the controls are made in the form of a flexible keyboard with five buttons. 3. The apgar timer module according to claim 2, characterized in that the electrical connection of the flexible keyboard to the printed circuit board is made by means of a loop. 4. The apgar timer module according to claim 1, characterized in that the power supply is represented by two batteries. 5. The apgar timer module according to claim 1, characterized in that on the back of the case there is a mount for fixing it to the holder of an external device. 6. The apgar timer module according to claim 1, characterized in that a cover is placed on the front side of the housing for access to the power supply. 7. The apgar timer module according to claim 1, characterized in that the electrical connection of the elements mounted on the printed circuit board is represented by a power circuit.

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