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Laser crushing device, laser crushing system and laser crushing method

A technology of laser crushing and laser light source, used in lasers, laser welding equipment, laser parts and other directions, and can solve problems such as the detailed mechanism that has not yet been clarified

Pending Publication Date: 2022-06-07
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has been confirmed that this attraction effect works by pulling concretions located far away toward the optical fiber in an oblique or forward direction, but the detailed mechanism has not been elucidated so far.

Method used

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  • Laser crushing device, laser crushing system and laser crushing method
  • Laser crushing device, laser crushing system and laser crushing method
  • Laser crushing device, laser crushing system and laser crushing method

Examples

Experimental program
Comparison scheme
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Embodiment

[0153] Next, examples of the laser fragmentation device 3 , the laser fragmentation system 1 , and the laser fragmentation method according to the above-described embodiments will be described.

[0154] (method)

[0155]In this embodiment, four pulse shapes with the same pulse energy, that is, square pulse (Squre: Sq), descending triangle pulse (Descending Triangle: DT), ascending triangle pulse (Ascending Triangle: AT), and M-shaped pulse are used. (M-shaped Pulse: MP) as a comparison object. Optical energy transmission was carried out using a fiber with a core diameter of 270um (HLFDBX0270c, DornierMedTech). Table 1 shows the pulse shape parameters, Figure 10 Indicates the pulse shape of each pulse.

[0156] [Table 1]

[0157] Pulse shape parameters

[0158]

[0159] Furthermore, as Figure 10 The pulse energy (J), average power (W), and pulse width (μs) of parameters other than the shown pulse shape are selected in this embodiment, and can be referred to as exampl...

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Abstract

A laser crushing device (3) is provided with: a waveform control unit (27) that pulses laser light excited from a laser light source (21) and adjusts the output of the pulsed laser light; and a fiber tip (23a) that emits the laser light, the output of which has been adjusted by the waveform control unit (27), to urinary calculi (S) in the liquid, and the waveform control unit (27) switches the output of the laser light to a second period in which the output monotonically decreases at a gradient greater than a predetermined gradient after a first period in which the output monotonically increases.

Description

technical field [0001] Cross-reference of related applications [0002] This application claims priority to US Provisional Patent Application No. 62 / 934,019, filed on November 12, 2019, which is incorporated by reference in its entirety in this specification. [0003] The invention relates to a laser crushing device, a laser crushing system and a laser crushing method. Background technique [0004] Conventionally, as a treatment for urolithiasis, laser lithotripsy in which the stone is broken by irradiating the stone with a laser has been performed. As lasers for breaking up stones, Ho:YAG lasers and Thulium Fiber Lasers were used. Depending on the size of the stone, due to the reaction force of bubbles and fragmentation generated by the laser irradiation, the stone moves significantly backward (retropulsion), or the stone moves (migrates) in a direction deviating from the irradiation direction of the laser. Receding is also likely to occur in the method of breaking up th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/26
CPCA61B18/26A61P13/12A61B2018/00577A61B2018/00982A61B2018/00517A61B2018/263A61B2018/0066A61B2017/00477A61B2018/00732A61B2018/00904B23K26/0622B23K26/0853B23K26/40H01S3/06716H01S3/1616
Inventor 高田祐平
Owner OLYMPUS CORP
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