CN110013208A - An ultra-wide-angle endoscope structure - Google Patents

Abstract

The invention relates to a medical endoscope. An ultra-wide-angle endoscope structure includes an insertion tube, wherein an image channel, an illumination channel and an instrument channel are arranged in the insertion tube, the insertion tube includes a front end portion and a curved portion, and the instrument channel in the front end portion includes The curved guide channel and the horizontal guide channel are provided, and the outlet surface of the instrument channel is an arc surface. The invention provides an ultra-wide-angle endoscope with simple structure, wide field of view, no dead angle for operation, small diameter of the insertion tube and less pain for the patient; The technical problem is that it cannot be removed to the lesion part, and the movement angle of the instrument is limited.

Description

An ultra-wide-angle endoscope structure

technical field

The invention relates to a medical endoscope, in particular to an ultra-wide-angle endoscope structure.

Background technique

At present, in the medical field, the examination, diagnosis and treatment of minimally invasive surgery have been highly recognized by the industry. As a member of the minimally invasive surgical instruments, medical endoscopes can penetrate deep into the body of patients, and can more intuitively observe the lesions and diagnose The results are accurate, and at the same time, the damage to the human body is small, the pain of the patient is relieved, and the patient can recover better and faster. Endoscopes are mainly used in the natural orifice of the human body, especially in complex orifice operations, such as bladder or bile duct stone surgery.

The structure of the endoscope basically consists of an insertion part and an operation part connected to a display. The insertion part refers to the part that is inserted into the human body. Generally, the thinner the insertion part, the better, so as to reduce the damage to the human body. The operation part is the part where the doctor performs the surgical operation, and the monitor displays the image of the lesion transmitted by the image sensor at the end of the insertion part. The operation is completed through the cooperation of the above three parts.

The end of the insertion part is generally installed with a lens, the lens is located in the image channel, and there is an instrument channel below the image channel, which is convenient for instruments to enter and perform surgical operations, but most of the current instrument channels are parallel to the image channel and are straight channels. , as shown in Figure 5, in many cases, the lens in the image channel can see where the target is, but due to the limitation of the instrument channel, the instrument often cannot reach the target, which makes many doctors in the operation. Feel very helpless.

SUMMARY OF THE INVENTION

The invention provides an ultra-wide-angle endoscope with simple structure, wide field of view, no dead angle for operation, small diameter of the insertion tube and less pain for the patient; It is a technical problem that the lesion cannot be removed, and the movement angle of the instrument is limited.

The above-mentioned technical problem of the present invention is solved by the following technical solutions: an ultra-wide-angle endoscope structure, including an insertion tube, the insertion tube is provided with an image channel, an illumination channel and an instrument channel, and the insertion tube includes A front end portion and a curved portion, the instrument channel in the front end portion includes a curved guide channel and a horizontal guide channel, and the outlet surface of the instrument channel is an arc surface. A curved guide channel is formed on the front side of the instrument channel, the instrument moves in the instrument channel, is introduced by the horizontal guide channel on the rear side, and then passes through the curved guide channel on the front side, which can increase the outlet angle of the instrument by more than 15°, avoiding Because the instrument channels in the prior art are all horizontal straight channels, the working angle of the instruments is limited, and many visible lesion parts, that is, the parts that cannot be treated, are well treated. It solves the dead angle of the lesion, realizes the purpose of the operation, and will not fail the operation because it is out of reach. The curved surface of the device channel outlet increases the cross-sectional area of the device channel outlet, which can increase the water flow in the device channel and improve the flushing effect. The diameter of the instrument channel is about 1.2mm, and the diameter of the insertion tube is about 3mm. The diameter is small, the insertion is smooth, and the patient suffers less.

Preferably, the instrument channel is located below the image channel, a lens is arranged in the image channel, an image sensor is arranged behind the lens, and a transmission wire is connected behind the image sensor, and the starting end of the curved guide channel is located below the image sensor. The space occupied by the image sensor is relatively small, and the arc-shaped channel design of the instrument channel is carried out here, and the structure is reasonable. After ensuring the reserved space for wiring in the lighting channel, the curvature of the curved guide channel of the instrument channel is designed to achieve the best operating angle of the instrument.

Preferably, the included angle between the center line of the curved guide channel and the center line of the image channel is 5°˜45°.

Preferably, the inner wall of the instrument channel is provided with a guide surface near the outlet, and the guide surface is inclined downward. The guide surface is an arc-shaped surface, and its radius of curvature is smaller than that of the curved guide channel. When the guide surface is protruding from the device channel, the device will pass through the arc-shaped guide surface at the exit, and the device outlet can be extended more smoothly. out.

Preferably, the instrument channel and the lighting channel are arranged in a Y shape.

Preferably, the intersection of the center line of the curved guide channel and the target is located within the field of view of the lens at the end of the image channel. The field of view of the lens is 60°~160°. The field of view is large, the observation range is large, and the lesions can be well treated.

Preferably, there are two illumination channels, the illumination channels are located on both sides of the image channel, and the illumination channels are provided with light guides. Double diverging beams make the illumination higher, the illumination angle is larger, and the light spot is more uniform. With the objective lens group with a large viewing angle and a high-definition camera sensor, the image is clearer and the field of view is wider. The illuminance of the light guide is 1000～300000Lux.

Preferably, the curved portion is a snake-bone structure. Can realize multi-angle observation.

Therefore, the structure of an ultra-wide-angle endoscope of the present invention has the following advantages: simple structure, large-angle operation without dead angle operation, large field of view, and within the range of the field of view, the instrument can be bent by the instrument channel The guiding part is inserted obliquely, which improves the working range of the instrument channel and realizes the purpose of accurate surgical detection and operation. The insertion diameter is small, the insertion is smooth, and the patient suffers less.

Description of drawings

FIG. 1 is a front cross-sectional view of a structure of an ultra-wide-angle endoscope according to the present invention.

FIG. 2 is a left side view of FIG. 1 .

FIG. 3 is a plan cross-sectional view of FIG. 1 .

Figure 4 is a schematic diagram of the use of the endoscope structure.

FIG. 5 is a schematic diagram of the use of an endoscope structure in the prior art.

Detailed ways

The technical solutions of the invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example:

As shown in Figures 1, 2 and 3, an ultra-wide-angle endoscope structure includes an insertion tube, and the diameter of the insertion tube is about 3 mm. The insertion tube is composed of an interconnected tip portion 14 and a curved portion 3, and the curved portion 3 adopts a snake-bone structure that can be deformed and bent at a large angle. The tip portion 14 includes an image channel 1 , an illumination channel 4 and an instrument channel 2 . The instrument channel 2 is located below the image channel 1, and the illumination channel 4 is located on both sides of the image channel 1.

An objective lens 5 is installed at the end of the image channel 1, and the field angle β of the objective lens 5 is 60°~160°. A CMOS image sensor 7 is installed behind the objective lens 5, and the image sensor 7 is connected to an external display through a transmission wire 8.

Light guides 6 are installed in the illumination channels 4 on both sides, and the illuminance of the light guides 6 is 1000-300000Lux. The background is illuminated by the double guide light beams 6 with divergent angles to provide sufficient light protection. The captured image is captured by the objective lens 5 through the CMOS image sensor 7 as the core to realize the video acquisition circuit, and the light source and image data are connected to the image controller. , with FPGA and DDR memory as the core to achieve high-speed video cache, and FPGA programming control module to achieve video processing and control.

The instrument channel 2 is located below the image channel 1. The diameter of the instrument channel is about 1.2 mm. The instrument channel 2 is composed of a curved guide channel 12 and a horizontal guide channel 13. The curved guide channel 12 is located at the outlet of the instrument channel. The snake-bone curved parts 3 are in contact with each other. The outlet of the instrument channel is an inwardly concave arc-shaped surface 11, the inner wall of the curved guide channel and the instrument outlet are designed as an arc-shaped guide surface 10, the guide surface 10 is inclined downward, and the curvature radius of the guide surface is smaller than that of the curved guide channel. the radius of curvature. The included angle α between the center line of the curved guide channel and the center line of the image channel is between 5° and 45°.

As shown in FIGS. 4 and 5 , in the endoscope structure of the present invention, the outlet angle of the instrument 15 is increased by more than 15 degrees, and when the instrument 15 extends from the instrument channel 2, it can accurately touch the field of view angle α. The target 9, while the structure of the endoscope in the prior art, because the entire instrument channel is horizontal, the target in the field of view cannot be touched, and can only be seen but not eliminated.

Claims (8)

1. a kind of ultra-wide angle endoscope structure, including insertion tube, the insertion tube is interior to be equipped with image channel, illumination channel and device Tool channel, it is characterised in that: the insertion tube includes front end and bending section, and the instrument channel in the front end includes Curved guide channel and horizontally-guided channel, the exit face of the instrument channel are arcwall face.

2. a kind of ultra-wide angle endoscope structure according to claim 1, it is characterised in that: the instrument channel is located at figure As the lower section in channel, it is equipped with eyeglass in image channel, is equipped with imaging sensor after eyeglass, imaging sensor rear is connected with transmission Electric wire, the starting point in the curved guide channel are located at below imaging sensor.

3. a kind of ultra-wide angle endoscope structure according to claim 1 or 2, it is characterised in that: the curved guide is logical The angle of the center line of the center line and image channel in road is 5 ° ~ 45 °.

4. a kind of ultra-wide angle endoscope structure according to claim 1 or 2, it is characterised in that: the instrument channel Inner wall is equipped with guide surface close to exit, and the guide surface tilts down.

5. a kind of ultra-wide angle endoscope structure according to claim 1 or 2, it is characterised in that: the instrument channel with Illuminate the Y-shaped arrangement in channel.

6. a kind of ultra-wide angle endoscope structure according to claim 1 or 2, it is characterised in that: the curved guide is logical The intersection point of road center line and object is located in the eyeglass visual field scope of image channel end.

7. a kind of ultra-wide angle endoscope structure according to claim 1 or 2, it is characterised in that: the illumination channel has Two, illumination channel is located at the two sides of image channel, illuminates and is equipped with light guide bundles in channel.

8. a kind of ultra-wide angle endoscope structure according to claim 1 or 2, it is characterised in that: the bending section is snake Bone structure.