Laser light irradiation system and laser light irradiation method
A laser light irradiation system that irradiates a stone in a body with laser light to cause the stone to be dust, the laser light irradiation system including a laser fiber that emits the laser light, and a processor configured to control a frequency of the laser light emitted from the laser fiber, wherein the processor is configured to switch between first laser light of a first frequency and second laser light of a second frequency such that the second laser light is emitted at least before or after an emission timing of the first laser light, the first laser light generating a water flow that pulls the stone toward the laser fiber, the second laser light generating a water flow that stirs the stone.
1 . A laser light irradiation system comprising:
a laser fiber that delivers laser lights from a light source; and
a sensor configured to output information comprising a detection of a state of a stone in a body and a state of a closed space to be irradiated with the laser lights,
a processor configured to:
control the light source to emit a series of first laser lights having a first frequency;
control the light source to emit a series of second laser lights having a second frequency, different from the first frequency, before or after an emission timing of the first laser light; and
switch between the first laser lights and the second laser lights based on the information output by the sensor, wherein:
the first laser lights are configured to, one of, generate a water flow that pulls the stone toward the laser fiber or generate a water flow that stirs the stone; and
the second laser lights are configured to perform the alternate one of, generate a water flow that pulls the stone toward the laser fiber or generate a water flow that stirs the stone.
2 . The laser light irradiation system according to claim 1 ,
wherein the processor is configured to switch the first frequency to a frequency lower than the second frequency.
3 . The laser light irradiation system according to claim 1 ,
wherein a frequency of the first laser lights are a frequency at which next first laser lights are emitted in a state where the stone pulled toward the laser fiber in accordance with irradiation of previous first laser lights are disposed in an irradiation range of the first laser lights.
4 . The laser light irradiation system according to claim 1 ,
wherein average power of the first laser lights light and the second laser lights are between 10 W and 30 W.
5 . The laser light irradiation system according to claim 1 ,
wherein the first frequency or second frequency is lower than or equal to 120 Hz.
6 . The laser light irradiation system according to claim 1 ,
wherein the state of the stone includes at least one of a size, number, type, and shape thereof.
7 . The laser light irradiation system according to claim 1 ,
wherein the state of the space includes at least one of a size, shape, and gravitational direction of the space.
8 . The laser light irradiation system according to claim 1 ,
wherein the sensor is a camera configured to acquire an image of the stone.
9 . The laser light irradiation system according to claim 1 ,
wherein the processor is configured to repeat emission of the first laser lights and the second laser lights are based on the information which is related to a size of the stone and which is output by the sensor.
10 . The laser light irradiation system according to claim 1 , further comprising:
a storage unit configured to store a plurality of control conditions for controlling the frequency of the laser lights,
wherein the processor is configured to control the frequency of the laser lights based on the control conditions stored in the storage unit.
11 . The laser light irradiation system according to claim 1 ,
wherein the first laser lights includes a first pulse train and the second laser lights includes a second pulse train which is different from the first pulse train.
12 . A laser light irradiation method for irradiating a stone in a body with laser lights to cause the stone to be dust, the laser light irradiation method comprising:
receiving information comprising a detection of a state of the stone and a state of a closed space to be irradiated with first laser lights and second laser lights;
controlling the first laser lights having a first frequency configured to generate a water flow that pulls the stone toward a fiber emission end from which the laser lights are emitted in a series;
controlling the second laser lights having a second frequency configured to generate a water flow that stirs the stone at least before or after an emission timing of the first laser lights in a series; and
switching between controlling the first laser lights and the second laser lights based on the received information.
13 . The laser light irradiation method according to claim 12 , wherein the frequency of the first laser lights are lower than the frequency of the second laser lights.
14 . The laser light irradiation method according to claim 12 ,
wherein the frequency of the first laser lights are a frequency at which next first laser lights are emitted in a state where the stone pulled toward the fiber emission end in accordance with irradiation of previous first laser lights are disposed in an irradiation range of the first laser lights.
15 . The laser light irradiation method according to claim 12 ,
wherein average power of the first laser lights and the second laser lights are between 10 W and 30 W.
16 . The laser light irradiation method according to claim 12 ,
wherein the first frequency is lower than or equal to 120 Hz.
17 . A method for causing a stone in a body to be dust, the method comprising:
receiving information comprising a detection of a state of the stone and a state of a closed space to be irradiated with first laser lights or second laser lights,
positioning a laser fiber to be directed to the stone, the laser fiber being configured to emit a series of the first laser lights;
keeping the laser fiber at a position while an operation is being performed, the operation making the first laser lights emit from the laser fiber configured to generate a water flow that pulls the stone toward the laser fiber; and
switching, based on the received information, to emit a series of the second laser lights configured to generate a water flow for stirring the stone before or after an emission timing of pulling the stone toward the laser fiber.
18 . The method according to claim 17 , further comprising:
switching the emission of the second laser lights to emission of the first laser lights when the stone moves into a range by the emission of the second laser lights, the range being one where a suction effect is generated by the first laser lights.
19 . The method according to claim 17 ,
wherein the switching of the emission of the first laser lights and the emission of the second laser lights are repeated until a size of the stone becomes smaller than a predetermined size.