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An optical fiber puncture needle tube

A puncture needle and optical fiber technology, applied in the field of medical devices, can solve the problems of increasing the diameter of the needle, destroying blood vessel tissue, trauma, etc., and achieve the effect of less waste rate, high efficiency, and waste reduction

Active Publication Date: 2019-09-13
尚华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, light can be introduced into the body by using a puncture needle containing an optical fiber, but due to the need to guide the light out from the optical fiber, the needle tip needs to have a hole of sufficient size to allow the light to pass through, which increases the diameter of the needle
In order to overcome the puncture resistance, the optical fiber is wrapped by a hard metal material, and the needle tube is relatively thick. During the puncture process, a lot of pressure is required to make it puncture, which is likely to cause a large trauma and damage the normal blood vessel tissue and cause bleeding.

Method used

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  • An optical fiber puncture needle tube
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of optical fiber puncture needle tube, shown in 1-4, it comprises optical fiber, and described optical fiber comprises main body part 8 and head, and described head comprises straight head 1 and tapered head 2, and the most of described tapered head 2 The front end or free end is a tapered tail end 21 with tapered diameter formed by the tapering process. One end of the straight head 1 is integrally connected with the main body 8 and fixedly connected or integrally formed, and the other end is connected with the large diameter end of the tapered head. Fixed connection or one-piece molding.

[0047] The periphery of the main body 8 is wrapped with a main tube 9, and the straight head 1 is wrapped with a metal jacket 4, and the metal jacket 4 is tightly wrapped around the periphery of the straight head 1 so that the straight head 1 of the optical fiber and the metal The jacket 4 is connected as a whole; the periphery of the taper head 2 is wrapped with a polymer jac...

Embodiment 2

[0062] On the basis of Embodiment 1, the main body tube 9 is a helical tube containing a plurality of helical coils, and the slit of the helical tube is a helical structure formed by laser cutting to form a helical slit.

[0063] like Figure 9 As shown, the Figure 9 It is a schematic view of the section of the main pipe 9, and is a view from the inside of the main pipe 9; in the main pipe 9, the width a of the slit is 0.02-0.2mm, such as 0.05, 0.08mm, 0.1mm, 0.15mm, etc. , the width d of the helical sheet forming the helical structure in the main tube 9 is 0.5-3 mm, such as 1 mm, and the thickness is 0.05-0.1 mm, such as 0.08 mm. The length of the main body tube 9 is nearly 2 meters, and it usually has 1-1.8m to penetrate into the human body, and the blood vessels of the human body vary in thickness and have a certain degree of curvature. The flexibility requirement is very high, so the width a of the slit, the width d of the helical piece, and the data of their thickness ...

Embodiment 3

[0068] On the basis of embodiment 2, the refractive index of the tapered head 2 of the optical fiber is 1.45-1.55, preferably 1.5, and the refractive index of the polymer coat 3 is 1.45-1.55, such as 1.45, 1.5, 1.55, etc., and then the tapered head 2 The taper angle β of middle tapered tail end 21 is 7-25 °, as Figure 5As shown, the taper angle of the tapered structure in the polymer jacket 3 is also basically consistent with the tapered tail end 21, which can basically ensure that the light emitted by the tapered head emits light within the range of 60-120°, and its angle is as follows: Figure 11 In the α shown. Specifically, it can be seen through optical simulation that if the cone angle β is 22°, the light divergence angle α is within 120°, and if the cone angle β is 7.6°, the light divergence angle α is within 60°. Therefore, when the cone angle β of the tapered head 2 is 7-25°, the light on the tapered head can be effectively directed to the target position, such as o...

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Abstract

The invention relates to an optical fiber puncture needle tube and an application thereof. The optical fiber puncture needle tube includes an optical fiber which is composed of a body part and a headpart. The head part includes a straight head and a tapered head. The most front end of the tapered head is a tapered tail end formed by a tapering process. The periphery of the body part is wrapped with a main pipe. The periphery of the straight head is wrapped with a metal jacket. The periphery of the tapered head is wrapped with a polymer jacket. In the polymer jacket, the part corresponding tothe tapered tail end is a tapered structure with diameter decreasing in turn. An inverted toothed structure or an inverted slot structure is arranged outside the polymer jacket. The puncture needle tube can realize the purpose of fast transmission in long blood vessels through the synergistic action of the components. The puncture needle tube can achieve higher light output efficiency and a bettertherapeutic effect, and has important application value and significance in photodynamic tumor treatment. Moreover, the puncture needle tube can be used in other fields, such as blood vessel blockageelimination or blood vessel puncture.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an optical fiber puncture needle tube and its application. Background technique [0002] Photodynamic therapy (Photodynamic Therapy, PDT) is a new technology that uses photodynamic effect for disease diagnosis and treatment. Its basis is the photodynamic effect. This is a photosensitization reaction accompanied by biological effects involving oxygen molecules. The process is that the photosensitizer absorbed by the tissue is excited by the laser irradiation of a specific wavelength, and the photosensitizer in the excited state transfers energy to the surrounding oxygen to generate highly active singlet oxygen, and the singlet oxygen and adjacent biological Oxidation of macromolecules produces cytotoxicity, which in turn leads to cell damage and even death. Compared with traditional therapy, photodynamic therapy has the advantages of less trauma, better targeting, no dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/06
Inventor 尚华
Owner 尚华
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