RU205294U1 - Video-assisted laryngoscope for small laboratory animals - Google Patents

Abstract

The utility model relates to the field of experimental medicine, namely to technical means in the form of video-assisted laryngoscopes (video laryngoscopes) designed to visualize the glottis of small rodents (mice, rats, guinea pigs) used for laboratory purposes. The video laryngoscope contains a collapsible video camera with a variable focal length, a Wi-Fi module for transmitting an image to a widescreen display, has the ability to mechanically adjust the camera illumination and replaceable blades. The fastening of the components is carried out by means of a threaded connection. The interchangeability of blades of various sizes and geometry as part of the device makes it possible to manipulate various types of animals with the components of one product. The proposed utility model has a simple design, the ability to connect to digital screens with different resolutions and increased performance, due to the variation of focus and image settings. 2 c.p. f-ly, 1 dwg.

Description

The utility model relates to the field of experimental medicine, namely to technical means in the form of video-assisted laryngoscopes (video laryngoscopes) designed to visualize the glottis of small rodents (mice, rats, guinea pigs) used for laboratory purposes. The proposed video laryngoscope is focused on visualization of the larynx for the purpose of tracheal intubation, as well as the introduction of a biologically active substance into the pulmonary system of animals through intratracheal instillation and intubation-mediated aerosol delivery.

From the prior art, the means aimed at instrumental examination of the vocal cords of small laboratory animals include a light laryngoscope, including one equipped with an auxiliary optical device, for example, a lens (USSR patent for invention No. 1003803. Laryngoscope. IPC А61В 1/26. Published: 03/07/1983. Bul. No. 10). The disadvantages of the model under consideration include the low ergonomics of the visualization process, which is associated with the limited lens diameter and small size of the glottis, and the fast movement cycles of the arytenoid cartilage of animals. This results in a small focal length from the laryngoscope to the investigator's eye and requires the operator to be in close proximity to the animal's mouth. Together with the risk of a back release of the substance introduced during the instillation, caused by the respiration of rodents, the latter may represent the prerequisites for violations of industrial safety requirements.

Known methods for direct visualization of the pharynx of rodents with optical and video approximation by means of a human otoscope (Balzer S., Cleveland WJ, Jinka, TR, Riess, M. L. Video laryngoscopy oral intubation in rats: a simple and effective method // American Journal of Physiology- Lung Cellular and Molecular Physiology. 2020. V. 318, No. 5. P. 1032-35. Doi: 10.1152 / ajplung.00498.2019). However, the disadvantage of this prototype is the lack of performance of the product in an adapted body and the function of wireless data transmission to the monitor. The third drawback of the device is associated with the fact that, due to the diameter of the chamber used, it is not suitable for visualizing the larynx in mice.

J.M., Correia-Pinto J. Animal facility videoendoscopic intubation station: tips and tricks from mice to rabbits // Laboratory Animals. 2016. V. 51, №2. P. 204-207). Недостатком сочетания 2 приборов можно считать задействованность 2 рук у оператора в ходе манипуляции и отсутствие свободного пространства в глотке животного. Это исключает проведение инстилляции фармакологической субстанции в трахею и сильно затрудняет постановку интубационной трубки мелким грызунам.To visualize the larynx, a rigid video endoscope in a rigid metal frame is used in conjunction with a laryngoscope (Miranda A.,

JM, Correia-Pinto J. Animal facility video endoscopic intubation station: tips and tricks from mice to rabbits // Laboratory Animals. 2016. V. 51, No. 2. P. 204-207). The disadvantage of the combination of 2 devices can be considered the involvement of 2 hands of the operator during the manipulation and the lack of free space in the throat of the animal. This excludes the instillation of the pharmacological substance into the trachea and greatly complicates the placement of the endotracheal tube in small rodents.

Known devices of this kind, intended for laryngoscopy in humans and with the ability to wirelessly transmit images to a large-format display and with the ability to change the blade (RF patent for useful model No. 158812. Device for laryngoscopy with visualization. IPC: A61B 1/00. Published: 20.01. 2016. Bulletin No. 2). In this device, in the mode of modernization of the metal body of a known medical product, the video camera is executed in the mode of external plastic wiring and does not allow, due to its location, to conduct effective disinfection after contact with biological material.

Closest to the claimed technical solution is a device for visualizing the larynx in rats (Patent No. CN 209789812 U Rat video intubation laryngoscope. IPC A61B 1/04; A61B 1/267; A61M 16/04. Publication date 17.12.2019. Https: // worldwide.espacenet.com/patent/search/family/068819621/publication/CN209789812U?q=laryngoscope%20AND%20rats), made in a monolithic case with an electronic monitor and no wireless connection with it. As a result of this and the lack of the possibility of changing the blade, the disadvantages of the prototype can be considered the limited use of it among various types of rodents and reduced processing capabilities.

Taking into account the products and models of the prior art, the need for a video-assisted laryngoscope for small laboratory animals, which is easy to operate and maintain, and the equipment is sufficient for use in several species, the task can be achieved with the following device.

The utility model is based on the task of creating a video-assisted laryngoscope for small laboratory animals, which provides increased accuracy when working with small biological objects, the efficiency of post-manipulation degassing and decontamination, increased safety for the operator and the possibility of broadcasting images for educational purposes.

The solution to this problem is provided by the fact that the laryngoscope for small laboratory animals includes a video endoscope, the function of wireless data transmission to the monitor. The device contains a handle as part of a collapsible structure, sequentially combined by means of detachable connections with a neck and blades. In a neck curved at 80 °, 5-6 cm long with an external diameter of 4 mm, the body of the video endoscope is placed, which abuts against the base of the replaceable blade, while the video endoscope contains a video camera with a focus range from 10 to 70 mm, the lens of which is framed by at least six LED elements; The handle is made of stainless steel, while the palm contact surface is covered with non-slip rubber of a congruent ergonomic shape, the product switch, a block for mechanical adjustment of the LED backlight level, a microUSB connector for recharging a nickel-metal hydride rechargeable battery of AAA size located in the channel of the handle are located on the occipital surface, and also in the channel of the laryngoscope handle there is a Wi-Fi module chip for a wireless communication method; the blades are made of medical anti-corrosion steel with a matte polish that prevents the reflection of the light flux, the removable blades are fixed on the video endoscope body as part of the neck of the product by means of a threaded connection adjusted so that the blades in the screwed state are located in a strictly specified position determined by the location of the animal's epiglottis.

The grip can be fitted with an additional cylindrical sleeve to which the monitor holding device is attached. The handle can be equipped with a connector for separate connection of the unit with a video camera.

The utility model is illustrated in FIG. 1, which shows a diagram of a video-assisted laryngoscope.

In contrast to optical approximation by means of a magnifying lens, a video camera and image transmission as part of the model provide sufficient clarity and image quality. The video-assisted laryngoscope (Fig. 1) for visualization of the larynx is characterized by adaptability for use in small laboratory animals and the possibility of various processing intensities, contains a collapsible video camera with a variable focal length, a Wi-Fi module for transmitting an image to a widescreen screen, has the ability to mechanically adjust the camera illumination and replaceable blades. The device of the video laryngoscope includes 3 units of general functional purpose: the handle (1), sequentially combined by means of detachable connections with the neck (2) and blades (3). The presence of three removable units in the structure of the device allows them to be interchanged with similar ones in case of failure.

Blades 3 are made of medical anti-corrosion steel with a matt polish to prevent reflections of the luminous flux. The attachment of the removable blades 3 to the body of the video endoscope as part of the neck 2 of the product is carried out by means of a threaded connection adjusted in such a way that the blades 3 in the screwed state are located in a strictly predetermined position. The interchangeability of blades of various sizes and geometry as part of the device allows manipulation of various types of animals with the components of one product.

The body of a video endoscope with an external diameter of 4 mm is located in a neck 2 bent by 80 °, 5-6 cm long and abuts against the base of a replaceable blade 3. The video endoscope includes a video camera with a possible focus range from 10 to 70 mm, the lens of which is framed by six LED elements.

Communication of the neck of the video laryngoscope with the handle is carried out by means of a 6-PIN threaded connection. The handle body is made of stainless steel. The palm contact surface is covered with non-slip rubber of a congruent ergonomic shape. On the occipital surface there is a product switch, a block for mechanical adjustment of the LED backlight level, a microUSB connector for recharging an AAA nickel-metal hydride rechargeable battery located in the handle channel. In addition, a Wi-Fi module chip is placed in the channel of the handle 1 of the laryngoscope for a wireless method of communication with the monitor. As a monitor, digital display means are used that support a similar Wi-Fi function (personal computer, TV, smartphone).

Thus, the video laryngoscope has a simple design, the ability to connect to screens with different resolutions and increased performance, due to the variation of focus and image settings. The technical result of this solution also presupposes a high probability of success in manipulations and a minimum traumatic potential for animals, allows for various degrees of intensity and conditions of processing of nodes and their connections, depending on the degree of contact with biological and chemical material.

The laryngoscope works as follows. Handle 1 is turned on, wireless setting is performed, and it is put into standby mode. Blade 3, neck 2 and handle 1 are connected. After preliminary sedation, the animals are placed on a manipulative table on their backs and fixed. A video laryngoscope is inserted into the oral cavity, then into the larynx of the animal. The tongue is withdrawn to the necessary-possible distance and the glottis is visualized on the screen. Adjust the brightness of the backlight, focus the arytenoid cartilage. Next, the main manipulation is carried out: tracheal intubation, or the introduction of the test substance by means of a dosing microsyringe.

Claims (3)

1. Video-assisted laryngoscope for small laboratory animals with the function of wireless data transmission to a monitor, including a video endoscope, characterized in that it contains a collapsible structure, a handle that is sequentially combined by means of detachable connections with a neck and blades, in a neck curved at 80 ° with a length of 5 -6 cm with an outer diameter of 4 mm, the body of the video endoscope is placed, which abuts against the base of the replaceable blade, while the video endoscope contains a video camera with a focus range from 10 to 70 mm, the lens of which is framed by at least six LED elements; the handle is made of stainless steel, while the palm contact surface is covered with non-slip rubber of a congruent ergonomic shape, the laryngoscope switch, a block for mechanical adjustment of the LED backlight level, a microUSB connector for recharging an AAA nickel-metal hydride rechargeable battery located in the handle channel are also located on the surface of the handle , as well as in the channel of the laryngoscope handle there is a Wi-Fi module chip for a wireless communication method; the blades are made of medical anti-corrosion steel with a matte polish that prevents the reflection of the light flux, the removable blades are fixed on the video endoscope body as part of the neck of the product by means of a threaded connection adjusted so that the blades in the screwed state are located in a strictly specified position determined by the location of the animal's epiglottis. 2. The video-assisted laryngoscope according to claim 1, characterized in that the handle is equipped with an additional cylindrical sleeve to which the monitor holding device is attached. 3. Video-assisted laryngoscope according to claim 1, characterized in that the handle is equipped with a connector for separate connection of the unit with a video camera.

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