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Venule vascular disease therapeutic instrument

A technology for vascular lesions and therapeutic instruments, applied in the field of laser therapeutic instruments, can solve the problems of high mass production cost of V-shaped cavity, serious thermal effect under high-energy pumping, low efficiency of ordinary straight cavity, etc., and achieves simple structure and easy adjustment. Effect

Active Publication Date: 2017-07-04
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the above-mentioned technologies, the present invention provides a microvenous vascular lesion treatment instrument to solve the problems of low efficiency of ordinary straight cavity, high batch production cost of V-shaped cavity, and serious thermal effect under high-energy pumping, etc.

Method used

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Experimental program
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Effect test

Embodiment 1

[0030] Such as image 3 As shown, the present invention provides a therapeutic apparatus for microvenous vascular disease, which includes a light-gathering cavity, a resonant cavity, and a temperature-controlled cooling system. The concentrating cavity includes a pumping source 1 and a gain medium 2 in the same optical path. The resonant cavity is used for oscillating, amplifying and frequency doubling the light emitted by the gain medium 2. The resonant cavity includes a total reflection mirror 3, a Q-switching device 4, a frequency doubling crystal 5, an output mirror 6, a fiber coupling lens 7 and a coupling fiber in the same optical path. 8; the Q-switching device 4 and the frequency doubling crystal 5 are respectively located on two opposite light-emitting sides of the gain medium 2 . The gain medium 2 is a single-doped Nd:YAG laser rod or a double-doped Nd:Ce:YAG laser rod. The two ends of the laser rod and the outer layer of the cylindrical surface are provided with pu...

Embodiment 2

[0038] On the basis of Embodiment 1, the resonant cavity further includes a λ / 4 wave plate 10 between the Q-switching device 4 and the gain medium 2 and a harmonic mirror 11 between the gain medium 2 and the frequency doubling crystal 5 . The λ / 4 wave plate 10 is a wave plate in the 1064nm wave band, and the surface of the λ / 4 wave plate 10 is coated with a dielectric film with a transmittance of not less than 99% in the 1064 nm wave band. By adjusting the direction of the fast axis of the λ / 4 wave plate 3, the The laser is in the best output state. The harmonic mirror 11 is coated with a dielectric film with a transmittance of not less than 99% in the 1064nm band and a reflectivity of not less than 99% in the 532nm band. At this time, what Q-switching device 4 selects is the active electro-optic Q-switching switch, and the active electro-optic Q-switching switch comprises an electro-optic Q-switching crystal and a polarizer 9 of a 1064nm band, and the polarizer 9 is located b...

Embodiment 3

[0040] On the basis of Embodiment 1, the resonant cavity further includes a harmonic mirror 11 located between the gain medium 2 and the frequency doubling crystal 5, and the pumping source 1 is semiconductor array pumping at this time.

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Abstract

The present invention discloses a venule vascular disease therapeutic instrument. The instrument comprises: a light-gathering cavity consisting of a pumping source and a gain medium of the same optical path; a resonant cavity configured to perform frequency multiplication of light emitted by the gain medium and consisting of a total reflective mirror, a regulation Q device, a frequency doubling crystal, an output mirror, a fiber coupling lens and a coupling fiber of the same optical path, wherein the regulation Q device and the frequency doubling crystal are respectively located at two opposite light emitting sides of the gain medium; temperature control cooling systems are respectively arranged at the light-gathering cavity and the frequency doubling crystal; the gain medium is single-added Nd: YAG laser bar or double-added Nd : YAG laser bar, the two ends of the laser bar and the external layer of the cylindrical surface are provided with pure YAG crystal without Nd and Ce ions; and the two ends of the laser bar pure YAG crystal are plated with a dielectric film having a 1064nm waveband transmissivity being not less than 99%. The venule vascular disease therapeutic instrument provided by the invention can solve the problems that the common straight cavity efficiency is low, the V-shaped cavity batch production cost is high and the thermal effect is severe under the large energy pumping, etc.

Description

technical field [0001] The present invention relates to the technical field of laser therapeutic apparatus, and more specifically, the present invention relates to a therapeutic apparatus for microvenous vascular disease. Background technique [0002] The 532nm band is at the absorption peak of hemoglobin. The laser in this band irradiates the subcutaneous tissue through the skin surface. Due to the selective light absorption of the laser wavelength, the absorption of the blood vessel wall is almost negligible, while the absorption of hemoglobin in the blood is very strong, so raises blood temperature. When the temperature rises to 60°C-80°C, the blood protein will coagulate, the collagen will denature, and the platelet embolism will form. As a result, the blood vessels will be closed due to the photocoagulation effect, and the therapeutic purpose will be achieved. Higher peak power can be obtained by using a longer pulse green laser in the 532nm band, and the pulse width o...

Claims

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Application Information

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IPC IPC(8): A61N5/067
CPCA61N5/0613A61N2005/0602A61N5/067
Inventor 郑陈琪杨杰陈瑞涛顾华东丁可为
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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