Jet Stream Generating Device With Adjustable Laser Positioning
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Solution Overview
Problem
Current jet stream generating devices face limitations in generating high-intensity and long-duration liquid jets due to inefficient absorption of pulse laser energy by the liquid, leading to suboptimal jet stream velocity and efficiency, and lack the ability to finely control the crushing force and duration for precise surgical applications.
Innovation Solution
A jet stream generating device with a cylindrical liquid chamber having a mirror plane on its inner surface and an adjustable optical fiber position to optimize laser beam absorption and reflection, allowing for variable pulse energy and width control, and intermittent jet stream generation to limit pressure wave propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the optical fiber is fixed at a predetermined position in the liquid chamber, then the device structure is simple, but the jet stream velocity and duration cannot be finely controlled
Solution Approach 1:
The optical fiber is made movable along the liquid chamber axis rather than being fixed, allowing dynamic adjustment of the irradiation position. This enables continuous control of jet stream velocity and duration by varying the optical fiber position, resolving the contradiction between operational flexibility and structural simplicity.
Solution Approach 2:
By changing the position parameter of the optical fiber along the liquid chamber axis, the jet stream characteristics (velocity and duration) are controlled. This parameter adjustment allows fine-tuning of surgical effects without requiring complex additional control mechanisms.
2Speed
If the pulse laser energy is increased to generate higher velocity jet stream, then the jet stream velocity increases, but the pressure wave propagation damage to surrounding tissues increases
Solution Approach 1:
The optical fiber is positioned to irradiate only a localized region of the liquid chamber, creating a focused vaporization zone. This localized energy application generates high-velocity jet stream at the target position while limiting pressure wave propagation to surrounding tissues, resolving the contradiction between jet velocity and tissue damage.
Solution Approach 2:
The liquid chamber acts as an intermediary medium that converts laser energy into a controlled liquid jet. By adjusting the optical fiber position within the liquid chamber, the energy conversion location is controlled, enabling high-velocity jet generation at the desired position while the liquid chamber contains and directs the pressure wave away from sensitive tissues.
3Productivity
If the laser beam irradiation position is fixed, then the device structure is simple, but the jet stream generation efficiency decreases when the distance between optical fiber and nozzle is not optimal
Solution Approach 1:
The optical fiber is made dynamically adjustable along the liquid chamber axis, allowing the irradiation position to be optimized for maximum jet stream generation efficiency. This dynamic positioning capability enables the system to achieve optimal performance without requiring complex mechanical adjustment mechanisms for the entire device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves high-velocity and efficient jet stream generation with adjustable flow rate and duration, enabling precise control over crushing and preserving biotissues by utilizing the elastic differences, thus minimizing tissue damage and improving surgical precision.
Implementation Method 1
irradiating a pulse laser beam into a liquid chamber to heat and vaporize liquid inside the liquid chamber, thereby generating a bubble
Implementation Method 2
the expanded bubble injects liquid from a nozzle to generate a liquid jet stream
Implementation Method 3
cylindrical liquid chamber having a mirror plane on its inner surface to optimize laser beam absorption and reflection
Data Source
Figure 1
Figure 2
Figure 3(a)~3(d)
AI summary
The present invention provides a jet stream generating device that can generate a jet stream having high velocity, that can generate a jet stream of liquid at high efficiency, that can adjust the flow rate of the jet stream and energy of the liquid, and that can adjust the jet stream time, using a simple configuration. The present invention is a jet stream generating device (100) configured to generate a jet stream of liquid, having: a cylindrical liquid chamber (160) such as a metal cylindrical member; a nozzle (165) configured to open an end part of the liquid chamber 160 and inject liquid F in the liquid chamber (160) to outside; a liquid supply path (140) configured to supply liquid F into the liquid chamber (160); a laser beam irradiation part (21) configured to irradiate a pulse laser beam into the liquid chamber (160), and vaporize the liquid F in the liquid chamber (160); and a laser device (2) (laser oscillator) configured to control laser beam intensity and laser beam pulse width independently. An inner surface of the liquid chamber (160) has a mirror plane for reflecting and guiding the pulse laser beam emitted from the laser beam irradiation part (21) to the end part of the liquid chamber (160), and an adjusting part (170) configured to adjust a distance between the nozzle (165) and the laser beam irradiation part (21) is included.