Acoustic Pathogen Disruption via High-Cycle Fatigue
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Solution Overview
Problem
Current antibacterial, antiviral, and antifungal medications face challenges due to the development of resistant pathogens, necessitating a non-chemical approach to selectively disrupt pathogens without harming somatic cells, which are differentiated by their mechanical properties.
Innovation Solution
The use of tailored acoustic excitation below cavitation thresholds to apply high-cycle fatigue to pathogens, utilizing a conformable piezoelectric transducer array with specific frequency, amplitude, and orientation, to selectively compromise the integrity of bacterial, fungal, or viral membranes without causing cavitation or excessive heating in the surrounding medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical antibiotics are used to kill pathogens, then pathogen viability is reduced, but pathogen resistance develops over time
Solution Approach 1:
The patent replaces chemical antibacterial agents with a mechanical system using acoustic waves to disrupt pathogen membranes. The acoustic transducer generates pressure variations that mechanically compromise pathogen integrity through high-cycle fatigue, eliminating the chemical interaction that leads to resistance development.
Solution Approach 2:
The patent employs mechanical vibration through acoustic excitation at specific frequencies to selectively disrupt pathogen membranes. The vibration causes high-cycle fatigue in the pathogen cell walls and membranes, leading to structural failure without affecting somatic cells that have different mechanical properties.
2Reliability
If high intensity acoustic radiation is used to disrupt pathogens, then pathogen membranes are compromised, but cavitation and excessive heating occur in the surrounding medium
Solution Approach 1:
The patent carefully controls acoustic parameters including intensity (below cavitation threshold), frequency (resonant with pathogen structures), and duration (sufficient cycles for fatigue) to achieve selective pathogen disruption without causing harmful cavitation or excessive heating in the surrounding medium.
Solution Approach 2:
The patent uses periodic acoustic pressure variations applied over many cycles to induce high-cycle fatigue in pathogen membranes. This periodic mechanical stress accumulates damage to the pathogen structure over time while remaining below the threshold for immediate cavitation or thermal damage to surrounding tissues.
3Reliability
If acoustic pressure is applied to disrupt pathogens, then pathogen viability is diminished, but somatic cells may also be affected
Solution Approach 1:
The patent exploits local quality differences in mechanical properties between pathogens and somatic cells. Pathogens have rigid cell walls and high internal pressure that make them susceptible to acoustic fatigue, while somatic cells with flexible membranes and low internal pressure remain unaffected by the same acoustic treatment.
Solution Approach 2:
The patent converts the high internal pressure that pathogens use for their metabolic functions into a vulnerability. The same turgor pressure and internal stress that maintain pathogen structure also make their membranes more susceptible to acoustic fatigue and mechanical disruption.
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
This method effectively diminishes the viability of pathogens while preserving somatic cells, potentially enhancing the efficacy of antimicrobial agents and addressing antibiotic resistance, by exploiting the mechanical differences between pathogens and somatic cells through precise acoustic pressure variations.
Implementation Method 1
acoustic radiation has been routinely applied to non-invasive imaging of biological tissues at low intensities and to gross mechanical disruption of macroscopic targets such as kidney stones or tumors at substantially higher intensities
Implementation Method 2
administering greater than ten thousand cycles of pressure variation below the threshold for cavitation of the surrounding medium
Implementation Method 3
the acoustic transducer is a conformable piezoelectric transducer array
Implementation Method 4
administering greater than ten thousand cycles of pressure variation below the threshold for cavitation of the surrounding medium
Data Source
AI summary
Described herein are methods and devices for selectively diminishing viability of or killing bacterial, fungal, or viral pathogens using acoustic excitation below the thresholds for cavitation.