RU192359U1 - Lighting unit with adjustable blinking frequency for laryngostroboscopy - Google Patents

Abstract

The utility model relates to medical equipment, in particular, to devices for examining the state of human vocal folds. Allows you to judge the presence or absence of a pathological process in the larynx in adults and children, to conduct differential diagnosis of functional and organic diseases of the vocal apparatus. A lighting unit with an adjustable flicker frequency for laryngostroboscopy containing an integrated timer chip that generates rectangular pulses, the voltage of which is supplied from power supply unit, a signal frequency control unit that allows you to get rectangular pulses and a specific frequency, power unit signal, represented by a field effect transistor, transmitting it to a light source, characterized in that it is convenient to use at low cost for its development and operation in comparison with modern existing analogs. 2 ill.

Description

The utility model relates to medical equipment, in particular to devices for examining the state of human vocal folds using the stroboscopic effect.

The urgency of the problem is justified by the fact that in the diagnosis of diseases of the human vocal apparatus, the method of classical indirect laryngoscopy does not allow to fully assess the state of human vocal folds. At present, during routine examination of the vocal folds using this method, laryngoscopic handles with continuous LEDs located in its inner part are used. Inspection by a doctor is carried out directly by attaching to the laryngoscopic handle a standard interchangeable fiber-optic blade.

A full-fledged diagnostic study of the state of the vocal folds is possible only with the high-tech method of laryngostroboscopy, the use of which in everyday clinical practice is difficult due to the relatively high costs of acquiring industrially produced electronic laryngostroboscopes, the complexity of their multi-element design and the management of its settings, significant weight and size characteristics, due to which insufficient equipment similar devices phoniatric care rooms, dia Gnostics of otorhinolaryngological pathology.

Closest to the proposed device is a device for laryngoscopy, which is a hollow metal handle with a lighting system located in it, which uses an LED, as well as a power supply unit with a compartment for accommodating three AAA batteries connected to each other by central contact rings [US 2017258952, A1, 11/10/2017].

The disadvantage of this device is the operation of the lighting system in continuous mode and the inability to implement a stroboscopic effect to assess the state of the vocal folds.

This device is taken as a prototype.

The objective and technical result of the proposed utility model is to create a compact device that allows you to expand the technical capabilities of laryngostroboscopy, to ensure the availability and speed of diagnosis of the anatomical and functional state of the vocal folds.

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

The utility model is illustrated by graphic material. In FIG. 1 shows a block diagram of the design of the developed lighting unit with an adjustable flicker frequency for laryngostroboscopy, where 1 is a power supply; 2 - signal frequency control unit; 3 - block generating rectangular pulses; 4 - signal amplification unit; 5 - light source.

The rectangular pulse generation unit (3) is supplied with voltage from the power supply unit (1), which is a lithium-polymer battery. The rectangular pulse generation unit is represented by an integrated timer-chip NE555 for generating repetitive pulses with stable temporal characteristics. The signal frequency control unit (2) is represented by a 3540S-1-203L multi-turn precision resistor and allows you to set the frequency value for the rectangular pulses generated by block 3, choosing it so that it matches the frequency of oscillation of the vocal folds of a person. The signal amplification unit (4), represented by the IRFZ44N field-effect transistor, increases the voltage from the square-wave pulse generating unit. The light source (5) converts the input voltage of the signal into optical pulses. A white LED with a power of 5 W and a heat of light of 6800 K was used as a light source.

In FIG. 2 is a structural diagram of a lighting unit with an adjustable flicker frequency for laryngostroboscopy. For laryngostroboscopy, the developed lighting unit with its end end with a threaded connection (6) is connected to a replaceable curved blade of a standard rigid laryngoscope, which is placed in the patient’s wide open mouth. The inclusion of the developed lighting unit is performed using the toggle switch (7) on its body. Then, using the switch (9), the required flicker frequency of the LED is selected to assess the state of the voice folds, the visualization of which is possible using a medical video monitor connected to the device via a USB port (8).

After the laryngostroboscopy procedure, the lighting unit with a controlled flicker frequency is turned off and disconnected from the blade of the laryngoscope, followed by treatment with 70% alcohol and stored strictly under aseptic conditions. Every 3 hours of continuous operation, the lighting unit must be charged from the mains.

The developed device allows you to judge the presence or absence of a pathological process in the larynx in adults and children, to conduct differential diagnosis of functional and organic diseases of the vocal apparatus.

The developed device can and should be used for use in the offices of otorhinolaryngological and phoniatric pathology of healthcare institutions by qualified medical personnel. The proposed device has a low cost due to the simplicity of its design and assembly, convenient in operation.

Claims (1)

An illumination unit with an adjustable flicker frequency for laryngostroboscopy, connected by an end end with a threaded connection to a removable curved blade of a standard rigid laryngoscope and containing an integrated timer chip that generates rectangular pulses, the voltage of which is supplied from the power supply unit, and a signal frequency control unit that allows receiving pulse pulses rectangular shape and a certain frequency, the signal amplification unit, represented by a field effect transistor, transmitting it to the sources light.

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