RU168516U1 - AUTONOMOUS OPTICAL LIQUID FLOW METER FOR MEDICAL DROPS - Google Patents

Abstract

The utility model relates to the field of medical technology and is intended for use in droppers infusing a liquid drug to a human or animal. The claimed technical solution is used for the drip infusion of liquids, in particular medicines or drugs / blood components into the venous vessel of the human circulatory system. types of droppers. The technical task is to develop a device with registration and drop counting during intravenous infusion in an autonomous p press with the transfer of data on the results of counting to the clinic’s wireless network without compromising the integrity of the infusion system and supporting compatibility with common types of droppers. Achieving the development goal is ensured by design features that require mounting compatible with most infusion systems, as well as using an optical control system in the infrared range , allowing with sufficient accuracy to carry out the required measurements with multiple installation of the device. Another advantage is the increase in the efficiency and safety of the installation and removal of the optical control system for intravenous infusion through the use of a clamp, which is part of the design of the device’s body.

Description

The technical solution claimed as a utility model relates to the field of medical technology and is intended for use in droppers infusing a liquid drug to a human or animal.

The claimed technical solution is used for drip infusion of fluids, in particular medicines or drugs / blood components into a venous vessel of the human circulatory system. The task of measuring the flow rate of the infused fluid during drip infusion of drugs is an important task in order to ensure human safety and increase the effectiveness of treatment.

Known automatic detection and signaling system for a medical dropper (analogue) according to the certificate of Russia for utility model No. 36980 dated 09/30/2003, IPC: A61M 5/14, G08B21 / 00, published on 04/10/2004, which includes a container for a medicinal fluid, a transparent cylinder for indicating the flow rate, a tube, a flow controller and a syringe, and also contains a clip located on it detection means, an alarm device connected to the specified detection means, and means for ensuring the swing of the droplet transmitter, and press adapted for its mounting on the outer surface of said cylinder indicating no compression or deformation of the cylinder and two opposite clamping grips said respective hollows formed; said detection means includes an emitter and a receiver, which are separately located in the depressions of the specified clip, so that the specified emitter and the specified receiver are spaced from each other by the indicated indication cylinder, being facing each other when the specified clip is fixed to the indicated indication cylinder at a predetermined height ; said signaling device is connected to said detection means by means of a conductor for receiving signals from said detection means and is provided with internal electronic control circuits for performing detection and tuning functions; the specified means for ensuring the swing of the droplet transmitter is located inside the indicated cylinder of the indicator below the pipette, which is available for the dropper and passed through the center of the upper cover of the indicated cylinder of indication, and contains a balancing support and a transmitter of drops, pivotally and eccentrically connected to the lower end of the specified balancing support with the ability to swing around of this support and the downward inclination of the portion of the transmitter with a larger radial width when the drop of medicine falling from the indicated pipette is hit, about the specified portion to a transmitter having a large radial width, due to which the grip is fixed on the indicated indication cylinder, and the indicated medical dropper is adjusted using the indicated flow controller to drip the medicinal fluid at a constant number of drops per minute, the specified droplet transmitter is periodically subjected to shock drops of the drug, making oscillations of a constant frequency with periodic overlapping of the interval between the specified emitter and the specified receiver having a large radial w If the indicated area of the droplet transmitter is used to shut off the indicated detection means at the specified terminal, the indicated electronic circuits of the indicated alarm device are capable of detecting the indicated periodic shutdowns of the detection means and set the standard values of the number of drops or flow rate per minute for the specified specific drug installation operation, and the indicated alarm device starts automatically when an abnormal number of capes is observed for a given period of time s or flow per minute. The detection tool in this analogue is adapted to emit and receive infrared light, magnetic waves or laser radiation. The analogue signaling device is equipped with external access switches and a display for working with said electronic control circuits of said signaling device.

Thus, the automatic detection and signaling system for a medical dropper according to the certificate for utility model No. 36980 contains a liquid container, a flask with two crimping plates, in which the light source and photodetector, fluid connecting tubes, syringe, signaling unit and display are located. The consumption of the number of drops is determined by the principle of "shading" of the photodetector during the passage of a drop between it and the light source.

General technological features related to this analogue with the claimed technical solution consist in the presence of a clamp adapted for mounting it on the outer surface of the indication cylinder located on the clamp of the detection means, as well as in the presence of an alarm device connected to the detection means.

The disadvantages of this device include the low accuracy of determining the number of drops due to the use of a single emitter and the structural connection of the clamp and the housing using a wire; the inability to transmit droplet counting results to a wireless WiFi network.

Known Automatic capacitive liquid flow meter for a medical dropper (prototype) according to the Russian patent for utility model No. 93146 dated 10.11.2009, IPC: G01F 23/00, G08B 21/00, A61M 5/14, published on 04/20/2010. , which includes a series-connected container with a liquid drug, a flask with two plates that fit on the walls, a flow controller and a syringe, as well as a series-connected alarm unit and a display, and it additionally contains a high-frequency signal generator, the output connected to the input electrode, and between the output electrode and the second signaling unit further includes series-connected amplitude detector, a low pass filter, an amplifier and a comparator, wherein the container with the liquid drug, flask, syringe flow rate controller and connected by tubes.

Thus, in the prototype device, to solve the problem, it is proposed to use a capacitive liquid flow meter for a medical dropper, in which the medical dropper flask contains two plates that fit along the walls, a flow controller and a syringe, as well as a signaling unit and a display connected in series. As indicated in the description of the prototype, since the bulb body is made of dielectric, and the plates are made of conductive material, and these plates are not electrically connected to each other, such a design (bulb with plates) is a capacitor. The authors of the useful prototype model note that the high accuracy of the device is determined by the fact that regardless of the optical uniformity and transparency of the flask material, the principle of operation of the capacitor is not violated, and high noise immunity is caused by the fact that no light effects affect the electrical circuit of the device with the capacitor turned on.

However, with all the above positive qualities of the technical solution of the prototype, this technical solution is applicable to a limited type of droppers. Therefore, the disadvantage of the prototype is the impossibility of implementing an autonomous device design without violating the integrity of the infusion system and with support for compatibility with common types of droppers. Therefore, the prototype device is not sufficiently autonomous and universal.

The purpose of the development of the proposed technical solution is the creation of an autonomous device for optical measurement of fluid flow, the most safe for the patient and with the possibility of use for different types of droppers.

The technical task is to develop a device with registration and drop counting during intravenous infusion in an autonomous mode with the transfer of counting results to the clinic’s wireless network without compromising the integrity of the infusion system and supporting compatibility with common types of droppers.

Achieving this result is ensured by design features that require mounting that is compatible with most infusion systems, as well as the use of an optical control system in the infrared range, which allows the required measurements to be carried out with sufficient accuracy when installing the device multiple times. Another advantage is the increased efficiency and safety of the installation and removal of the optical control system for intravenous infusion through the use of a clamp, which is part of the design of the device.

A self-contained optical liquid flow meter for a medical dropper is a device mounted on a transparent drip chamber (flask of a droplet indicating cylinder) of the infusion system from the outside with a clamp and which ensures the detection of droplets using a system of optical sensors operating in the infrared range, followed by counting their number and transferring this information to a wireless WiFi network. The technical essence of the utility model lies in the design of the optical sensor system and the data acquisition and processing device with their subsequent transmission over the WIFI wireless network in one housing with a clamping mechanism.

The essence of the claimed technical solution lies in the fact that a stand-alone optical liquid flow meter for a medical dropper includes an optical sensor system that implements registration of drops and counts the speed and volume of infusion, and two sources and one light signal receiver are located in the same plane in the housing, made together clamping mechanism for mounting outside on a cylindrical flask dropper, and also includes a data collection and processing unit for transmission to a wireless network WiFi communication, and the battery for the autonomous operation. The inventive stand-alone optical liquid flow meter for a medical dropper can be equipped with a charger with a spring contact.

The claimed technical solution is illustrated by a drawing, drawing and photographs:

FIG. 1 - arrangement of sources and receiver of a light signal;

FIG. 2 is a photograph of the installation of a device on a dropper flask using a clamp;

FIG. 3 - photograph of the device in the process of work;

FIG. 4 - a sketch of the image of the device in the process.

The drawing positions are as follows:

1 - dropper flask;

2 - case;

3 - optical sensor (receiver) of light;

4 - optical light sources (emitters) - two LEDs;

5 - indicator;

6 - initialization button.

A stand-alone optical liquid flow meter is installed on the dropper flask 1 using a clamping mechanism, made in conjunction with the device body structurally as a whole. The housing 2 is connected to the clamping mechanism by means of a hinge with a spring, which holds the meter on the dropper bulb during use. The case has the shape of a “drop” with dimensions of 7 × 4 × 4 cm, including the handles of the clamping mechanism (Fig. 4).

To register the droplets, an optical sensor system is used, which includes an optical receiver of light flux 3 and two optical emitters (light sources) in the infrared range 4 mounted diametrically opposite to receiver 3 in one plane perpendicular to the central (axial) line of the bulb having a cylindrical shape.

The emitters 4 are located at a distance of 5-7 mm relative to each other at an equal distance relative to the straight line passing through the receiver 3 and the point formed by the intersection of the center (axial) line of the dropper bulb and the plane of the optical sensors. When installing, the directivity of the emitters 4 to the receiver 3 is ensured.

Thus, with the outer diameter of the bulb 15–16 mm, the angles between the rays formed by the light sources 4 and the straight line passing through the receiver 3 and the point formed by the intersection of the center (axial) line of the dropper bulb and the plane of the optical sensors is 17–25 °.

Given the difference in the dimensions of the sources and receivers of light signals in the infrared range, the emitters 4 are installed on the side opposite to the mounting of the clamping mechanism to the housing of the device 2. This allows the required accuracy of the sensors to be installed in the conditions of minor defects in the mounting holes in the housing.

The stand-alone optical liquid flow meter also includes a data collection and processing device, which includes an information collection unit, an STM32L100RB microcontroller, and a wireless information transmission unit (WI-FI module type ESP8266).

The device operates as follows.

The device is installed using the clamping mechanism on the flask dropper 1 (Fig. 2, 4).

The counting procedure is started by pressing the initialization button 6. After that, the device starts recording and counting drops (Fig. 3), as indicated by the blinking of indicator 5.

Periodically, information about the number of drops and the current infusion rate (the ratio of the number of drops to the duration of the procedure - the time elapsed from its beginning) is transmitted as a formal message to the WiFi network, which makes it possible to receive this information in a software application on the nurse’s mobile communication device.

At the time of termination of the procedure (identified in the case of a significant delay between drops, from 10 sampling intervals), a corresponding notification is sent to the wireless communication network, the indicator is green, it does not blink.

Compared with the known, the proposed device has autonomy, the consequence of which is the ease of installation, the speed of event identification and security.

The ability to repeatedly play the inventive device stems from the method of its manufacture, this method is industrial and suitable for the production of a large number of identical products.

A similar combination of versatility, achieving the possibility of manufacturing a compact safe and easy-to-use device with the relative simplicity of manufacture in the prototype has not been achieved.

Based on the foregoing, we can conclude that the claimed technical solution meets the criteria of "novelty" and "industrial applicability".

Claims (1)

A stand-alone optical liquid flow meter for a medical dropper includes an optical sensor system that implements drop detection and counts the infusion rate and volume, characterized in that the optical sensor system includes two sources and one light signal receiver, the light signal sources being installed diametrically opposite to the receiver in the same plane perpendicular to the central axial line of the bulb having a cylindrical shape in a housing made together with a clamping mechanism Nia for installation outside of the cylindrical flask dropper, wherein the housing unit is also arranged for collecting and processing data for transmission in a wireless communication network and WiFi battery for battery life.

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