RU126939U1 - DEVICE FOR HEATING BLOOD, BLOOD SUBSTITUTES AND SOLUTIONS FOR INFUSION THERAPY - Google Patents

Abstract

1. A device for heating blood, blood substitutes and solutions for infusion therapy, containing a container with a solution, a dropper, a flow regulator, an infusion hose and an injection needle, characterized in that it contains a metal stand designed to secure a container on it to hold the original infusion fluid and droppers, while the infusion hose is made in the form of a receiving tube, in the walls of which a heating element is built along its entire length without breaks, also contains a temperature sensor located directly enno near the infusion needle connected to the heating element and a controller, coupled to the power supply unit, wherein the infusion needle serves as an injection needle, and a flow regulator configured as a clip-regulyator.2. The device according to claim 1, characterized in that the controller is made in the form of a control board with an information display in one plastic case. The device according to claim 1, characterized in that the temperature sensor is made in the form of a thermistor. The device according to claim 1, characterized in that the heating element is made in the form of a heating thread, in particular of nichrome.

Description

The utility model relates to injection devices for medical purposes and, in particular, to devices for infusion of blood, for example, under the action of gravity.

A device for conducting normothermic infusion therapy is known, comprising an infusion hose passed through a sealed heat exchanger equipped with upper and lower sealing connectors, consisting of a rigid and communicating flexible body filled with a heat transfer fluid heated by an automatic thermostat installed in a rigid body. A circulation pump is installed inside the rigid casing, connected to the inlet of the liquid coolant pumping channel, the outlet of which is located inside the hermetic heat exchanger near the lower sealing connector (patent No. 2285544 C2, RU, A61M 5/14, priority dated 05.11.2004, bulletin No. 29 from 20.10 .2006).

The disadvantage of this device is the measurement of the temperature of the blood transfused to the patient not directly at the point of transfusion, but near its exit from the container, thereby eliminating hyperthermia of the transfused blood, as well as the relative complexity of the device.

The closest in technical essence to the claimed technical solution is an infusion device containing a dropper, an infusion hose connected to its outlet, a flow regulator installed on the hose, an infusion needle mounted on the free end of the infusion hose, and a flow heater with an automatic temperature controller mounted on infusion hose with the possibility of its coverage, while the flow heater is made in the form of several rigid removable modules mounted on an infusion hose with a prom creepy. At the same time, at least one sensor of an automatic temperature controller is installed on each removable module (patent No. 2093195 C1, RU, A61M 5/14, priority from 03/24/93, bulletin No. 29 from 10/20/97).

The disadvantages of the closest to the claimed device are:

- firstly, the relatively low mobility of the infusion hose due to the presence of rigid modules fixed to it;

- secondly, the location of the temperature sensor is relatively far from the infusion needle for the need to ensure the mobility of the infusion hose in the presence of rigid modules;

- and thirdly, although heating occurs along the entire length, but with discontinuities due to discrete rigid modules, which affects the accuracy of fixing the temperature of heating the infusion fluid.

The objective of the claimed utility model is to create a device that allows to increase the mobility of the infusion hose, to increase the accuracy of installation and determination of the temperature of the infusion fluid directly at the infusion needle, to constantly heat the fluid (blood, blood substitutes and solutions) infused to the patient during infusion therapy and simplify the device as a whole.

The technical result consists in minimizing the effect of hypothermia and increasing the accuracy of maintaining the temperature of the liquid infused to the patient directly at the infusion needle and, as a result, eliminating the complications caused by this procedure, as well as simplifying the device.

The technical result is achieved by the fact that in the device for heating blood, blood substitutes and solutions during infusion therapy, the heating element is located (built-in) inside the receiving tube along its entire length without interruption. This allows you to maintain the temperature of the fluid injected to the patient stable over the entire length of the receiving tube and in a given temperature range. In this case, the temperature sensor of the fluid injected into the patient is located in close proximity to the infusion (injection) needle, which minimizes the effect of hypothermia.

The proposed device is illustrated in figure 1 and figure 2.

Figure 1 presents a General view of the device.

Figure 2 is a cross section of a tube along aa.

The proposed device of figure 1 includes a metal rack 1, designed to secure on it a container 2 (for example, in the form of a funnel) to accommodate the initial infusion fluid 3 and a dropper 4 located under the container 2 and connected to it, the dropper is connected to the receiving tube 5 , inside of which a heating element 6 is built in, under the dropper 4 there is a clamp-regulator 7 of the infusion fluid 3 coming to the infusion needle 8, while the receiving tube 5 ends with the infusion needle 8, in front of which in close proximity STI mounted sensor 9 connected within the receiving tube 5 to the heating element 6 and wire 10 is a controller 11 containing information display connected to the power supply unit 12.

The operation of the device is as follows.

The infusion fluid 3 from the tank 2 with a constant speed through the dropper enters the receiving tube 5 and flows down to the infusion needle 8. Flowing through the receiving tube 5 to the infusion needle 8, the infusion fluid 3 is heated by the heating element 6 built into the walls of the receiving tube 5. When this heating temperature of the infusion fluid 3 is regulated by the controller 11, equipped with an information display. Data on the current temperature of the infusion fluid 3 (with an error of no more than _ + 0.5 ° C) comes from the temperature sensor 9 installed on the receiving tube and in close proximity to the infusion needle 8. This allows you to accurately control and set the optimum heating temperature of the infusion fluid 3 just before the infusion. The heating temperature can be set in the range of 31-41 degrees Celsius, depending on the type of infusion fluid 3, in increments of 0.1 degrees Celsius. When the set optimum temperature of the infusion fluid 3 is exceeded, the signal from the temperature sensor 9 is supplied to the controller 11, the signal from which turns off the heating.

The main blocks of the device (execution):

Controller - represents a control board on standard microcircuits with a display for reading the current and set temperature, assembled in one plastic case.

A temperature sensor is a device that is sensitive to temperature changes (for example, a thermistor that changes resistance when the temperature changes). It automatically turns on and off the heating circuit of the filament of the heating element. The temperature sensor inside the receiving tube is connected to a heating thread, for example from nichrome, and is controlled by commands from the controller.

In this case, the heating of the infusion fluid is turned off when the current temperature exceeds the permissible one established by the doctor (nurse) by 0.1 degrees Celsius.

The remaining elements of the device are typical for this type of application in infusion therapy.

Claims (4)

1. A device for heating blood, blood substitutes and solutions for infusion therapy, containing a container with a solution, a dropper, a flow regulator, an infusion hose and an injection needle, characterized in that it contains a metal stand designed to secure a container on it to hold the original infusion fluid and droppers, while the infusion hose is made in the form of a receiving tube, in the walls of which a heating element is built along its entire length without breaks, also contains a temperature sensor located directly enno near the infusion needle connected to the heating element and a controller, coupled to the power supply unit, wherein the infusion needle serves as an injection needle, and a flow regulator configured as a clamp controller. 2. The device according to claim 1, characterized in that the controller is made in the form of a control board with an information display in one plastic case. 3. The device according to claim 1, characterized in that the temperature sensor is made in the form of a thermistor. 4. The device according to claim 1, characterized in that the heating element is made in the form of a heating thread, in particular of nichrome.

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