Pulsed Shock Wave Drug Injection Device
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Solution Overview
Problem
Existing drug injection technologies face challenges such as injection phobia, risk of infection, and generation of medical waste, with liquid injection technologies struggling to accurately adjust thermal conductivity and requiring large, expensive equipment.
Innovation Solution
A drug injection device using pulsed shock waves, comprising a power unit, pulsed shock wave generating unit, upper and lower housings, and a shock wave transmitting unit, which generates pulsed power to create shock waves that expand a liquid and inject a drug without damaging optical systems or requiring complex equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If laser pulse is used to generate shock waves in liquid, then high-speed liquid stream is generated, but equipment size and price increase
Solution Approach 1:
The patent replaces the optical laser system with an electrical discharge system. Instead of using laser pulses to generate shock waves, the invention uses electrical discharge between electrodes immersed in the liquid to create bubbles that generate shock waves. This substitution eliminates the need for complex optical systems while achieving the same effect of generating high-speed liquid streams through shock wave-induced bubble collapse.
Solution Approach 2:
The patent changes the physical mechanism from optical energy input (laser) to electrical energy input (electrical discharge). By changing the energy input method and the resulting physical process (from direct laser heating to bubble formation and collapse), the system achieves comparable liquid stream speeds without requiring expensive laser equipment.
2Temperature
If high energy laser pulse is used to generate shock waves, then liquid expands effectively, but optical systems may be damaged
Solution Approach 1:
The patent substitutes the laser optical system with an electrical discharge system. Electrical discharge between electrodes in the liquid creates bubbles through localized heating and vaporization, which then collapse to generate shock waves. This method achieves effective liquid expansion without using high-energy laser pulses that could damage optical components.
Solution Approach 2:
The patent introduces bubbles as an intermediary mechanism. Instead of directly heating the liquid with laser (which risks optical damage), the electrical discharge creates bubbles that act as intermediaries to transfer energy to the liquid. The bubble collapse generates shock waves that expand the liquid effectively while the electrical discharge system avoids the damage risks associated with high-energy optical systems.
3Power
If multiple optical systems are used to irradiate laser beam, then shock waves are generated, but system complexity increases
Solution Approach 1:
The patent replaces multiple optical systems with a simple electrical discharge system. Instead of using multiple lasers or optical components to generate shock waves, the invention uses electrical discharge between two electrodes immersed in the liquid. This substitution dramatically reduces system complexity while maintaining the power needed to generate effective shock waves for drug injection.
4Speed
If thermal expansion method is used to generate shock waves, then liquid jet is formed, but thermal conductivity control is difficult
Solution Approach 1:
The patent changes the energy input method from thermal (laser heating) to electrical (discharge between electrodes). Electrical discharge allows for precise control of energy input parameters such as voltage, current, and pulse duration, which directly control bubble formation and collapse. This provides much easier adjustment of shock wave intensity and liquid jet speed compared to controlling thermal conductivity in laser-based systems.
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 allows for adjustable liquid expansion, economical implementation, and simplified control of drug injection, preventing optical system damage and reducing equipment costs while improving injection precision and safety.
Implementation Method 1
a pulsed shock wave generating unit that receives the pulsed power and generates the pulsed shock waves
Implementation Method 2
first and second shock wave generating electrodes that receive the pulsed power and allow a current to instantaneously flow
Implementation Method 3
a shock wave transmitting unit provided between the upper housing and the lower housing and transmitting the shock waves generated in the upper housing to the lower housing
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
The present invention relates to a drug injection device using pulsed shock waves, the drug injection device comprising: a power unit generating pulsed power; a pulsed shock wave generating unit which receives the pulsed power and generates pulsed shock waves; an upper housing in which a liquid and the pulsed shock wave generating unit are disposed; a lower housing which is connected to the upper housing, and in which a drug is disposed; a shock wave transmission unit which is provided between the upper housing and the lower housing to separate the upper housing and the lower housing; and an injection unit which is disposed in the lower housing and inject the drug.