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Preparation method of optical fiber puncture needle, slit and homogenizer for homogenizing light

A puncture needle and light homogenizer technology, applied in the field of medical devices, can solve problems such as the inability to control the direction of lateral light output, insufficient optical power density, and damage to the light homogenizer, so as to achieve high light output efficiency and therapeutic effect, and improve irradiation efficiency and treatment effect, the effect of enhancing the effect of irradiation

Active Publication Date: 2019-07-26
尚华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above methods of forming a beam homogenizer have some disadvantages, including the production of scatterers with special doping concentrations and fiber gratings with graded specifications that require high processing technology, which inevitably leads to an increase in cost; When it is strong, it is easy to cause damage caused by heat absorption, thereby destroying the function of the homogenizer; since the scatterer and the grating are scattered 360 degrees to the side, the direction of the side light output cannot be controlled, and the power is dispersed within 360 degrees in the radial direction. , if the lesion is on one side of the irradiation area, the light is too scattered and the light power density of the lesion on one side is insufficient

Method used

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  • Preparation method of optical fiber puncture needle, slit and homogenizer for homogenizing light
  • Preparation method of optical fiber puncture needle, slit and homogenizer for homogenizing light
  • Preparation method of optical fiber puncture needle, slit and homogenizer for homogenizing light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] An optical fiber puncture needle for homogenizing light, which includes an optical fiber, the optical fiber includes a main body 8, and the main body 8 is connected with a homogenizer 2 capable of emitting light. like Figure 1-2 As shown in , since the optical fiber cannot be seen from the outside, the optical fiber is indicated by a dotted line.

[0056] like image 3 As shown, the homogenizer 2 is a light guide device composed of a tubular structure or a rod-shaped structure. The light guide device includes a tube sleeve 11 whose inner wall has a reflection effect. If there are slits 12 on both sides that can emit light evenly, the light in the sleeve 11 can be evenly emitted from the slit 12. The slit can run through the entire length direction of the sleeve, or can be a part of the length direction of the sleeve. Set it up as needed.

[0057] The periphery of the main body 8 is wrapped with a main tube 9, and the periphery of the homogenizer 2 is provided with a...

Embodiment 2

[0070] On the basis of Example 1, the slit 12 capable of uniform light emission needs to meet the following conditions, that is, the change of the slit width with the length satisfies the formula ① Among them, d(z) is the width of the slit at z; L is the length of the sleeve; z is the length of the slit at the measurement point z along the transmission direction of the light; r is the inner diameter of the light guide device (that is, the length of the sleeve) Inner diameter); controlling the width of the slit through this formula ① can make the emitted light evenly distributed.

[0071] The transmittance of light in the slit 12 satisfies the formula ② Among them, T(z) is the transmittance of the light exiting from the slit 12 at z, L is the length of the sleeve; z is the length of the slit at the measuring point z along the transmission direction of the light; r is the light guide inside diameter of the device.

[0072] When the transmittance T(z)<1, the width of the slit...

Embodiment 3

[0077] On the basis of Embodiment 1 or 2, during the transmission of light in the sleeve, part of the light is output through the slit on the side. By controlling the width of the slit, the outgoing light can be evenly distributed, and the expression of the slit width d(z) is deduced below.

[0078] First, assume that the light transmission direction in the sleeve is the z direction, the inner diameter of the sleeve is r, the optical power at z in the sleeve is P(z), and the relationship between the optical power density I(z) and P(z) is:

[0079]

[0080] or

[0081] P(z)=πr 2 I(z) (2)

[0082] Assuming that the width of the slit at z is d(z), then the transmittance T(z) of the light exiting the sleeve at z is:

[0083]

[0084] Therefore, the optical power transmitted through the slit at z can be obtained as:

[0085] dP(z)=-I(z)T(z)2πrdz (4)

[0086] Now it is necessary to keep the transmitted light power uniform, that is, dP(z) is required to be a constant value, ...

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Abstract

Disclosed are an optical fiber puncture needle capable of uniformly emitting light, and a method for preparing a slit (12) and a light homogenizer (2). The optical fiber puncture needle comprises an optical fiber. The optical fiber comprises a main body portion (8). The main body portion (8) is connected to the light homogenizer (2) capable of uniformly emitting light. The light homogenizer (2) comprises a tube sleeve (11) with an inner wall thereof having a reflection effect. A lateral face of the tube sleeve (11) is provided with the slit (12) running through inner and outer sides of the tube sleeve (11) and being capable of uniformly emitting light. The periphery of the main body portion (8) is wrapped by a main body tube (9). The periphery of the light homogenizer (2) is wrapped by a petal-shaped needle head (3) made of memory metal. The puncture needle can realize, by means of cooperative interaction between various components, the purpose of carrying out transmission in a long blood vessel more quickly, for example, the puncture needle can smoothly pass through a blood vessel with a length of nearly two meters; and the puncture needle can realize higher light emission efficiency and a better therapeutic effect, and has great application value and significance in photodynamic tumor therapy.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a preparation method of an optical fiber puncture needle for homogenizing light, a slit and a homogenizer. 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 ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/06
CPCA61N5/062A61N2005/0612A61N2005/063
Inventor 尚华
Owner 尚华
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