RU168715U1 - VIDEO ENDOSCOPE LIGHTING SYSTEM - Google Patents

Abstract

Usage: in medical technology and can be used when working with a video endoscope to study the gastrointestinal tract in white light and using the autofluorescence diagnostic method. Task: to increase the sensitivity of diagnosis, reduce the size and weight of the lighting system. Essence: lighting system for a video endoscope, consisting from a light-emitting device with a light source for illuminating the interior of the space, a fluorescent element for emitting fluorescent light and a light guide filled with a unit for generating and focusing light radiation made in the form of two aspherical lenses and a prism, a collimator and a prism located between the light-emitting device and the end face of the video endoscope connector, while the collimator is installed between the fluorescent element for emitting fluorescent light and the light guide, in addition, the light-emitting device is made in the form of an LED. 2 ill.

Description

The utility model relates to medical equipment and can be used when working with a video endoscope to study the gastrointestinal tract in white light and using the autofluorescence diagnostic method.

Using the phenomenon of autofluorescence in endoscopy allows you to get a fluorescence image of the mucosa, which shows the difference in the intensity of autofluorescence of healthy and diseased tissues in the green and red regions of the spectrum.

Known medical endoscope with a lighting device [1]. The lighting device includes a short high-pass filter, a viewing device with a long pass filter for viewing the red fluorescence excited by the lighting device. One of these filters is an interference filter and is controlled by an angular filter so that the transmission wavelength of the transmitted backlight is below the wavelength range of the transmitted fluorescent light.

The disadvantages of the known endoscope with a lighting device include the following:

- low sensitivity;

- an endoscope with a lighting device is complex, both in manufacture and in use;

- the endoscope is not intended for the study of the gastrointestinal tract.

Known lighting system video endoscopic complex company OLYMPUS [2].

The video endoscopic complex, in addition to the lighting system, also includes a video endoscope, processor and monitor. The lighting system contains a XENON-300 light source, three filters on a rotating disk, a locking filter and a matrix.

The disadvantages of this device include the following:

- large dimensions of the lighting unit;

- heavy lighting unit;

- not enough power to excite autofluorescence.

The closest technical solution to the proposed utility model is an endoscopic device with a lighting system [3], containing a processor, lighting system and monitor.

The lighting system includes a light emitting device, with a light source for illuminating the interior of the space, a fluorescent element for emitting fluorescent light with light from the light emitting device as light excitation, a light guide for transmitting light from the light emitting device for the fluorescent element, an element for branching part of the fluorescent light to be returned from a fluorescent element through a light guide, and an optical sensor for detecting a portion of the branched fluorescent light .

The endoscopic device is supplemented by a light source control unit for controlling light from the emitting state of the light emitting device using the result of detecting an optical sensor.

The light-emitting device may be made in the form of a laser diode that emits a laser beam with an oscillation wavelength in the range of 235 to 500 nm or as an LED emitting light with an oscillation wavelength in the range of 235 to 500 nm.

With a fluorescent element, the fluorescent light emitted by light from a light emitting device is like white light exciting light.

The disadvantages of the described endoscopic device with a lighting system include the following:

- the selected length range of 235-500 nm for both the laser diode and LED, in which below 400 nm it does not provide an image of the internal space on the monitor of the endoscopic device, and in the range from 400 to 500 nm there is not enough power for the sensitivity and accuracy of diagnosis.

- the location of the laser diode, which increases the dimensions of the device and does not provide ease of use.

The main task, which the utility model is aimed at, is to increase the sensitivity of diagnostics, reduce the size and weight of the lighting system.

To solve this problem, a lighting system for a video endoscope is proposed, which, like the prototype, consists of a light-emitting device with a light source to illuminate the interior of the space, a fluorescent element for emitting fluorescent light and a light guide.

In contrast to the prototype, the lighting system for a video endoscope is supplemented with a unit for generating and focusing light radiation made in the form of two aspherical lenses and a prism, a collimator and a prism located between the light-emitting device and the end face of the video endoscope connector, while the collimator is installed between the fluorescent element for emitting fluorescent light and the light guide, in addition, the light emitting device is made in the form of an LED.

The essence of the proposed utility model is that due to the use of a fluorescent element for emitting fluorescent light, the output power in the angle of 140 ° increases, when using an optical system, from the fluorescent element for emitting fluorescent light to the end face of the video endoscope connector, a compact and lightweight design of the entire lighting system is provided.

Using the proposed constructive solution of the video endoscope lighting system allows to increase the sensitivity and accuracy of diagnosis in the framework of medical practice.

The essence of the utility model is illustrated by drawings, where in FIG. 1 - shows a structural diagram of the lighting system of the video endoscope; in FIG. 2 is a graph showing the difference in the autofluorescence intensity of healthy and diseased tissues in the green and red regions of the spectrum.

The video endoscope lighting system consists of a fluorescent element for emitting fluorescent light 1, exciting autofluorescence, a collimator 2, a focusing light beam into a light guide 3, a unit for generating and focusing light radiation, consisting of an aspherical lens 4, a prism 5 and a spherical lens 6, a prism 7, a guide a laser beam at the end of the video endoscope connector 8 and a light-emitting device with a light source to illuminate the interior of the space 9, providing operation in white light mode.

The prism 7 is located between the light-emitting device 9 and the end face of the video endoscope connector 8, and the collimator 2 is installed between the fluorescent element for emitting fluorescent light 1 and the light guide 3, in addition, the light-emitting device 9 is made in the form of an LED.

The lighting system for a video endoscope works as follows.

When the power is turned on, LED 9 lights up, allowing you to work in white light mode. When you turn on the fluorescent element mode to emit fluorescent light 1 on the button of the video endoscope from the video endoscope, a signal is sent to the processor, which in turn drives the mechanism on which the prism 7 is attached, the prism 7 is aligned with the axis of the LED 9, the fluorescent element 1 is turned on, and when Using an optical system consisting of a collimator 2, a light guide 3, an aspherical lens 4, a prism 5, and a spherical lens 6, light radiation is projected into the end face of the video endoscope connector 8.

Thus, the proposed utility model makes it possible to increase the diagnostic sensitivity, as shown in FIG. 2, which shows the difference in the intensity of the autofluorescence spectra of a healthy and affected mucosa, which allows an accurate diagnosis.

In addition, it simplifies the process of preparing the patient for examination, provides quick and painless diagnostics, and significantly reduces the weight and dimensions of the lighting unit.

INFORMATION SOURCES

1 UK Patent No. 2347521, IPC: A61B 1/00; A61B 5/00; G02B 23/24, September 6, 2000

2 Olympus prospectus. Medical and Surgical Endoscopy with EXERA II. Olympus Observer 2007, p. 6, 7, 18, 21.

3 US Patent No. 2007147033, IPC: A61B 1/06; A61B 1/07; G02B 23/24, 06/28/2007 - prototype.

Claims (1)

A lighting system for a video endoscope comprising a light source in the form of an LED, a fluorescent element for emitting fluorescent light, a collimator mounted between the fluorescent element and the light guide associated with the light generation and focusing unit including an aspherical lens, a prism and a spherical lens, and a video endoscope connector characterized in that it is supplemented by a prism located between the light-emitting device and the end face of the video endoscope connector and mounted on a mechanism with zhnosti its alignment with the axis of the LED.

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