Pressure Pulse Jet Injection Device for Minimizing Skin Lesions

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Solution Overview

Problem

Current methods for injecting media under the skin using pressure pulses often result in multiple needle punctures and potential cutting injuries, limiting the efficiency and safety of transdermal delivery.

Innovation Solution

A device comprising a reservoir, hydraulic high-pressure pump, and electronic control unit that delivers media in a series of pressure pulses, allowing for controlled injection depth and distribution without needles, using interchangeable nozzles and pressure regulation to minimize lesions and ensure wide-area transdermal delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a single high pressure pulse is used for injection, then the injection speed is high, but cutting injuries and water jet effects occur

Engineering Contradiction:

Improveinjection speedVSAvoidcutting injuries

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent applies periodic action by dividing a single high-pressure pulse into a series of pressure pulses with intermittent intervals. The control unit regulates the high-pressure pump to generate multiple pulses rather than one continuous pulse, allowing the medium to be injected in controlled bursts that prevent water jet cutting effects while maintaining effective delivery speed

Inventive Principle:

Principle #19Periodic action

2Measurement precision

If injection needles are used for transdermal delivery, then precise delivery is achieved, but multiple needle punctures and lesions occur

Engineering Contradiction:

Improvedelivery precisionVSAvoidneedle punctures

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical needle puncture system with a pressure-based jet injection system. Instead of using physical needles to penetrate the skin, the invention uses controlled pressure pulses to propel the medium through the skin barrier, eliminating needle-related injuries while maintaining precise delivery through electronic control of injection parameters

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-affected harmful factors

If a series of pressure pulses is used for injection, then cutting injuries are minimized, but the injection duration increases

Engineering Contradiction:

Improvecutting injuriesVSAvoidinjection duration

Core Design Contradiction:

Object-affected harmful factorsVSDuration of action of moving object

Solution Approach 1:

The periodic action principle is applied by using a series of short-duration pressure pulses with controlled intervals. Each pulse is brief and high-intensity, but the overall injection process is extended across multiple pulses. This approach minimizes cutting injuries during each pulse while the total injection time remains manageable through optimized pulse frequency and duration

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The control unit dynamically adjusts multiple parameters including pulse frequency, pulse duration, and inter-pulse intervals to optimize the balance between minimizing injuries and maintaining efficient injection duration. By varying these parameters, the system adapts to different injection requirements while preventing water jet effects

Inventive Principle:

Principle #35Parameter changes

4Productivity

If high pressure is used for transdermal injection, then delivery efficiency is high, but tissue damage increases

Engineering Contradiction:

Improvedelivery efficiencyVSAvoidtissue damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

By using periodic pressure pulses instead of continuous high pressure, the system achieves effective transdermal delivery during each pulse while allowing tissue recovery during the intervals between pulses. This prevents cumulative tissue damage that would occur with sustained high pressure while maintaining high delivery efficiency through the cumulative effect of multiple pulses

Inventive Principle:

Principle #19Periodic action

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

Enables efficient, minimally invasive transdermal delivery of medications over large areas with controlled release, reducing needle punctures and potential injuries, accommodating various viscosities and substances, and allowing flexible control of injection parameters.

Implementation Method 1

a hydraulic high-pressure pump (6) for pumping the medium from the reservoir (1) into the application unit (10)

Methodology Applied

Scientific EffectHydraulic pressure: Hydraulic Press

Implementation Method 2

The application unit (10) can comprise at least one injection nozzle that can be actuated mechanically-hydraulically, electrically or piezoelectrically

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentEP2696920B1Device for injecting a medium into or under the skin with a series of pressure pulses

Publication Date: 2017.06.07 STOCKMAR JURGEN

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Figure 2A~2B
Figure 3~4

AI summary

The invention relates to a device for injecting a medium into or under the skin with a series of pressure pulses. The device comprises a reservoir (1) for the medium, an applicator unit (10) for injecting the medium into or under the skin, a hydraulic high-pressure pump (6) for pumping the medium from the reservoir (1) into the applicator unit (10), and an electronic control unit (11), which is suitable for controlling the applicator unit (10) in such a way that the medium is injected into or under the skin with a series of pressure pulses.