RU134794U1 - DEVICE FOR HEATING LIQUIDS AND MEDICINAL SOLUTIONS USED FOR INFUSION THERAPY - Google Patents

Abstract

A device for heating liquids and medicinal solutions used in infusion therapy, containing a power source, a heating element in the form of metal plates, characterized in that the liquid crystal display of the target heating temperature associated with a microcontroller equipped with an analog-to-digital converter form a control part, while the microcontroller is also connected to temperature sensors made in the form of thermocouples and with the possibility of installing on the trunk of the infusion system before and after heating an element, and with liquid crystal displays of the temperature of the solution before heating and the temperature of the heated solution, respectively, and the analog-to-digital converter is connected to the heating element and the Peltier semiconductor element forming the working part, the optical light refraction sensor is configured to detect the movement of liquid in the dropper of the infusion system and is connected with a microcontroller.

Description

The utility model relates to medicine, and more particularly to the field of infusion therapy.

The urgency of the problem today is justified by the negative and often fatal influence of the hypothermic and hyperthermic conditions of the human body. Severe forms of hyperthermia and hypothermia pose a threat to life, which determines the importance of their timely recognition and treatment in emergency care. Intravenous administration of cold solutions lowers body temperature and leads to hypothermia, the consequences of which adversely affect human health (1,2).

A device is known for heating liquids and medicinal solutions, consisting of a container filled with water, the temperature of which is 40-42 ° C (3).

The disadvantages of this device are the short duration of its performance, the impossibility of objective control of the temperature of the drug solution. Increased injury hazard when working with it.

A device for heating liquids and medicinal solutions is known, consisting of a wire frame for fixing containers and a heat source (4).

The disadvantages of this device are the inability to uniformly heat the liquid and control the temperature limit of heating.

Known device Empire - 01. Working on the principle of continuous heating of the liquid by heating the heat exchanger. The device consists of a heat source placed in a ceramic drum on the outer surface of which there are cylindrical grooves where a PVC tube from a disposable infusion system is located. The device is equipped with a digital temperature indicator that displays the temperature of the heated device and a digital temperature controller (5).

The disadvantages of this device are cumbersome and significant weight. The lack of battery life. The device does not provide objective control of the temperature of the medicinal solution at the inlet and outlet when it passes through the device.

A device for heating liquids and medicinal solutions AMPIRmini. The device includes a housing in which two heating metal plates are placed, a display for displaying the heating temperature of the device, a heat exchanger heating control unit, and a battery (5).

The disadvantages of this device is the short duration of its operation from the battery, 3 hours. The device does not provide objective control of the temperature of the liquid at the inlet and outlet when it passes through the device. Has an insufficient temperature range of the initial infusion solution: from + 18 ° C to + 30 ° C.

This device is taken as a prototype.

The purpose of creating a utility model is the development of a device for heating liquids and medicinal solutions used in infusion therapy, with advanced technical and operational characteristics.

The technical result of the created utility model is the possibility of controlled heating of the drug solution and objective control of the temperature of the drug solution at the exit in the given parameters, as well as achieving a wider temperature range of the primary infusion solution: from + 5 ° C to + 60 ° C.

This technical result is achieved by the fact that the device has a liquid crystal display of the target heating temperature associated with a microcontroller equipped with an analog-to-digital converter, form a control part, while the microcontroller is also connected to temperature sensors made in the form of thermocouples and with the possibility of installing on the trunk of the infusion system up to and after the heating element, and with liquid crystal displays of the temperature of the solution before heating and the temperature of the heated solution, respectively, and the analog-to-digital converter is connected to the heating element and the Peltier semiconductor element forming the working part, the optical light refraction sensor is configured to detect the movement of fluid in the dropper of the infusion system and is connected to the microcontroller.

The device consists of a liquid crystal display of the target heating temperature associated with a microcontroller equipped with an analog-to-digital converter, form a control part, while the microcontroller is also connected to temperature sensors made in the form of thermocouples and with the possibility of installing on the trunk of the infusion system before and after the heating element, and with liquid crystal displays of the temperature of the solution before heating and the temperature of the heated solution, respectively, and an analog-to-digital converter n with the heating element and the semiconductor Peltier element, forming the working portion, refractive optical sensor configured to fix the liquid movement in the flow of the infusion system and is connected to the microcontroller

Comparison of the proposed device with others known in the field of medicine, showed its compliance with the criteria of a utility model.

The utility model is illustrated by graphic material. Figure 1 shows a structural diagram of a device for heating liquids and medicinal solutions used in infusion therapy; figure 2 shows a General view of a device for heating liquids and medicinal solutions used in infusion therapy; figure 3 shows a General view of the control part of the device for heating liquids and medicinal solutions used in infusion therapy; figure 4 shows a General view of the working part and the optical light refraction sensor of the device for heating liquids and medicinal solutions used in infusion therapy: 1-control part, 2- working part, 3-optical light refraction sensor, 4 - digital panel with buttons for entering target temperature of heating the solution; 5, 11, 12-liquid crystal displays, 6 - a microcontroller, 7 - a digital-to-analog converter, 8 - a power source, 9, 10 - thermocouples, 13 - a heating element, 14 - a Peltier semiconductor element, 15 - a container with a medicinal solution, 16 - dropper, 17 - line of a single-use infusion system, 18 - wheel for adjusting the fluid flow rate in the system; 19, 20-pin wires.

The device is used as follows. Having prepared the system for infusion, the nurse fixes the optical light refraction sensor - 3, on the dropper - 16, and installs the working part of the device - 2 on the line of the infusion system - 17 made of silicone or Teflon, then presses the power button of the device, sets the required target temperature for heating the drug solution on the digital panel - 4, and opens the wheel for adjusting the flow rate in the system - 18. The target heating temperature is displayed on the liquid crystal display - 5. Optical light refraction sensor - 3 detects the movement of fluid in the dropper - 16 and sends a signal, through the contact wire - 19, "Start" to the microcontroller - 6. Thermocouple - 9, installed on the line of the infusion system - 17 to the heating element - 13, measures the temperature of the solution before heating and sends information to the microcontroller - 6, through the contact wire - 20. The temperature of the solution before heating is displayed on the liquid crystal display - 11. The microcontroller - 6, through the digital-to-analog converter - 7, sends an analog signal in the form of current to the heating element - 13, through the contact wire - 20, and in parallel reads information from the thermocouple - 10 installed on the line of the infusion system after the heating element - 13. The temperature of the heated solution is displayed on the liquid crystal display - 12. As soon as the temperature on the thermocouple - 10 reaches the target value, set by a medical professional, the controller captures and maintains the optimum temperature, if necessary, cooling the heating element using a Peltier-14 semiconductor element. The whole system is powered from the power source - 8.

The Peltier element is a thermoelectric converter, the principle of which is based on the Peltier effect - the occurrence of a temperature difference during the flow of electric current. In English literature, Peltier elements are designated as TEC (from the term Thermoelectric Cooler - thermoelectric cooler). The basis of the Peltier elements is the contact of two conductive materials with different levels of electron energy in the conduction band. When current flows through the contact of such materials, the electron must acquire energy in order to transfer to a higher-energy conduction band of another semiconductor. When this energy is absorbed, the contact point of the semiconductors is cooled. When the current flows in the opposite direction, the contact point of the semiconductors is heated, in addition to the usual thermal effect.

The solution is heated as follows. The optical light refraction sensor is fixed to a dropper, then the working part of the device is fixed to the line of a prepared and filled with a medicinal solution disposable infusion system. The fixing of these elements is performed by the type of clothespin. Medical personnel presses the power button of the device and opens the wheel for adjusting the flow rate in the system. The device works automatically.

The technical result is achieved as follows.

Controlled heating and temperature control of the drug solution at the outlet are ensured by the coordinated operation of the heating element and temperature sensors by means of a microcontroller. The use of a primary infusible solution with a wider temperature range from + 5 ° C to + 60 ° C is possible due to the higher temperature regime of incandescent heating element.

The operation of the device is illustrated by a clinical example. Patient V., 45 years old, had a medical history 12544/1432 who underwent detoxification in the emergency narcological care department of the Samara Regional Narcological Dispensary from 10/05/12 to 10/7/12 with a diagnosis of Chronic alcohol intoxication. Withdrawal syndrome. ”Detoxification procedure was started, after infusion with 30 ml of 0.9% sodium chloride solution, the temperature of which was 22 ° C, the patient complains of chills, signs of muscular tremor appear. After pouring another 20 ml of the same solution, muscle trembling is more pronounced, the patient begins to panic, actively complains of chills and cold. It was decided to connect a device for heating liquids and medicinal solutions used in infusion therapy. The nurse attaches the optical light refraction sensor to the dropper and installs the working part of the device on the infusion system line, then presses the device’s power button, sets the required heating temperature on the digital panel. An optical light refraction sensor detects fluid movement and sends a “Start” signal to the microcontroller via a contact wire. The target heating temperature is displayed on the LCD. A thermocouple installed on the line of the infusion system to the heating element measures the temperature of the solution before heating and sends information to the microcontroller via the contact wire. The temperature of the solution before heating is displayed on the LCD. The microcontroller, through a digital-to-analog converter, sends an analog signal in the form of current to the heating element via a contact wire, and in parallel reads information from the second thermocouple installed on the line of the infusion system after the heating element. The temperature of the heated solution is displayed on the LCD. As soon as the temperature at the thermocouple reaches the target value set by the medical professional, the controller captures and maintains the optimum temperature, if necessary, cooling the heating element with the help of a semiconductor Peltier element. The whole system is powered by a power source. The device confirmed its effectiveness after infusion of another 50 ml of a solution of optimal temperature - 36.6 ° C. The patient calmed down, muscle tremors stopped, the color of the skin took on a normal pale pink color.

The proposed device can and should be used in any medical institutions of the healthcare system during infusion therapy.

Information sources

1. Mallet M.L. Pathophysiology of accidental hypothermia // Q.J. Med. - 2002. - Vol. 95. - P.775-785.

2. Danzl D.F., Pozos R.S. Accidental hypothermia // N. Engl. J. Med. 1994. Vol.331. - P.1756-1760.

3. The Feldsher Handbook edited by Professor A.N. Shabanova “Medicine” 1976

4. The rationalization proposal No. 243 of April 10, 2013, Samara State Medical University of Samara.

5. Catalog of medical equipment "TAKHAT"

Claims (1)

A device for heating liquids and medicinal solutions used in infusion therapy, containing a power source, a heating element in the form of metal plates, characterized in that the liquid crystal display of the target heating temperature associated with a microcontroller equipped with an analog-to-digital converter form a control part, while the microcontroller is also connected to temperature sensors made in the form of thermocouples and with the possibility of installing on the trunk of the infusion system before and after heating an element, and with liquid crystal displays of the temperature of the solution before heating and the temperature of the heated solution, respectively, and the analog-to-digital converter is connected to the heating element and the Peltier semiconductor element forming the working part, the optical light refraction sensor is configured to detect the movement of liquid in the dropper of the infusion system and is connected with a microcontroller.

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