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Eccentric endoscope laser catheter

An eccentric, endoscopic technique, applied in the fields of endoscopy, catheterization, medical science, etc.

Active Publication Date: 2021-05-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are currently no catheters or similar products that combine eccentric endoscopy and laser therapy

Method used

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  • Eccentric endoscope laser catheter
  • Eccentric endoscope laser catheter
  • Eccentric endoscope laser catheter

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0025] The head end of the eccentric endoscope laser catheter tube (110) has three eccentric concentric circular apertures, the central aperture is used for the endoscope objective lens imaging system (112), and its aperture size is 1mm. In addition, there is an annular hole outside the central aperture for placing the illumination light source (113) required for endoscope imaging, and the size of the gap can be 0.3 mm. An annular aperture is designed on the outside of the aperture of the illumination light source for the discharge aperture (114) of physiological saline or gas, and the size of the gap is 0.2 mm. The injection of normal saline can reduce the damage of the lumen wall, or the injection of air can eliminate the interference of foreign bodies in the lumen, which is more helpful for imaging and treatment. Finally, the diameter of the whole catheter can be controlled in the range of 2.5-4.0mm, and can smoothly pass through the lumen in the human body for endoscopic i...

specific Embodiment approach 2

[0027] The optical fiber (111) for laser therapy used in the catheter can be a multi-wavelength optical fiber or a single-mode optical fiber. Flexibility for imaging and treatment within the vessel is maintained through the use of multiple small optical fibers. The fiber must be totally reflected in the core and the cladding. Considering that the core-to-cladding ratio of the fiber is 1:1.05 or 1:1.1, the core diameter of the small fiber can be controlled between 40-50 microns. In order to ensure the softness and flexibility of the conduit, the total number of optical fibers arranged in the entire conduit must not exceed 150, and the number of optical fibers can be controlled at 100-150 according to the size of the conduit. Adjust the number of optical fibers according to the specific clinical situation, and customize close-packed catheters, optimally spaced catheters, and high-density catheters. Tight-packed catheters consistently yield larger ablation areas, high-density ca...

specific Embodiment approach 3

[0029] Based on the first specific embodiment, the illumination light source (200) required by the endoscope system (300) for imaging is a cold light source. A cold light source is a light source that contains almost no infrared spectrum. The more popular light-emitting diode light source is a typical cold light source. The light generated by the cold light source is transmitted to the surface of the observed object in the lumen, and the surface of the observed object is illuminated. In order to make the illumination of the entire field of view uniform, the illumination range of the light source should be larger than the field of view angle, so the viewing angle of the light source part must increase the divergence function, and the light guide window of the light source can be made into a plano-concave lens.

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Abstract

The invention provides an eccentric endoscope catheter, which adopts eccentric aperture and optical fiber eccentric arrangement design to perform real-time imaging and real-time treatment on pathological tissues in a catheter cavity. The catheter comprises a catheter head end, a catheter wall part, a catheter cavity part and a catheter tail end. A plurality of apertures which are eccentrically and annularly distributed are designed in the catheter head end and are used for placing an endoscope objective lens imaging system, a lighting source required by endoscope imaging and a discharge aperture for normal saline or gas. A plurality of optical fibers used for laser ablation are arranged at the catheter cavity part and are arranged in an eccentric array manner. An aperture of an endoscope imaging system, an aperture of an illumination light source, an injection aperture of normal saline or gas and a plurality of optical fibers are reserved in the catheter cavity. A miniature spring and a flexible material are arranged on the catheter wall part, and the bending angle of catheter imaging and treatment is controlled. According to the design of the catheter, imaging and treatment in a catheter cavity are better combined, and the treatment time of minimally invasive surgery can be shortened.

Description

[0001] (1) Technical field [0002] The invention relates to the field of medical instruments, in particular to an eccentric endoscope laser catheter. [0003] (2) Background technology [0004] Minimally invasive surgery is relative to traditional surgery, which requires deep trauma to the human body to reach the specific location of the lesion. Minimally invasive surgery is a kind of surgery that allows surgeons to perform surgery without causing huge wounds to patients mainly through endoscopes and various imaging techniques. Minimally invasive surgery can greatly reduce the pain of patients and shorten the operating time of surgery. As a minimally invasive method, endoscopic technology has been widely used in the gastrointestinal tract, abdominal cavity, blood vessels, ears, nose, joints and other parts that need to be diagnosed. The endoscope is mainly used for the observation of the lumen wall to diagnose cardiovascular diseases or cooperate with accessories and lasers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/24A61B18/26A61B90/30
CPCA61B18/245A61B18/26A61B90/30A61B2018/00345A61B2018/00982A61B2018/2211A61B2090/309A61B2018/00482
Inventor 付博吉训明李静徐立军程湲张奡杰王子皓
Owner BEIHANG UNIV
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