Filament Pulse Control for Skin Micropore Ablation
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Solution Overview
Problem
Existing methods for thermal tissue ablation using metallic filaments struggle to efficiently create micropores in the skin for enhanced delivery of active pharmaceutical ingredients while minimizing pain and filament failure.
Innovation Solution
A thermal ablation system with a control unit that regulates electrical pulses to metallic filaments, controlling parameters such as current density, pulse width, and temperature to create micropores effectively, while preventing filament melting and ensuring safe energy delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If electrical energy is increased through metallic filaments to create deeper micropores, then transdermal delivery of active pharmaceuticals is enhanced, but filament melting and failure occur
Solution Approach 1:
The system applies electrical energy to the metallic filaments in periodic pulses rather than continuous energy delivery. The control unit regulates the timing and duration of pulses to allow heat dissipation between pulses, preventing filament melting while accumulating sufficient energy to create deeper micropores through repeated thermal cycles.
Solution Approach 2:
The system dynamically adjusts electrical parameters (current density, pulse width, frequency) based on real-time feedback from temperature sensors. This dynamic control allows the system to optimize energy delivery for deep micropore creation while preventing conditions that would lead to filament failure, adapting continuously to changing thermal conditions.
2Productivity
If electrical energy is delivered quickly through metallic filaments to ablate stratum corneum, then micropore creation efficiency is improved, but pain and tissue damage increase
Solution Approach 1:
The system uses pulsed electrical energy delivery with controlled intervals between pulses. This periodic action allows brief periods of high energy delivery for efficient stratum corneum ablation and micropore creation, followed by rest periods that allow thermal diffusion and cooling, reducing pain and preventing excessive tissue damage while maintaining high overall productivity.
Solution Approach 2:
The system applies just enough electrical energy in each pulse to achieve the desired ablation effect without excessive energy that would cause unnecessary pain or damage. The control unit precisely regulates pulse parameters to deliver sufficient energy for micropore creation through the stratum corneum while stopping before reaching thresholds that cause severe tissue damage or intense pain.
3Quantity of substance
If current density is increased to enhance micropore depth, then pharmaceutical flux rate is improved, but filament temperature control becomes difficult
Solution Approach 1:
The system incorporates temperature sensors that continuously monitor filament temperature and provide feedback to the control unit. When current density is increased to enhance micropore depth and pharmaceutical flux rate, the feedback mechanism detects temperature rise and automatically adjusts pulse parameters (reducing current density, increasing pulse intervals, or shortening pulse width) to maintain temperature within safe operating limits.
Solution Approach 2:
The system dynamically changes multiple electrical parameters (current density, pulse width, frequency, duty cycle) in response to temperature conditions. When higher current density is needed for deeper micropores and improved pharmaceutical flux, the system compensates by adjusting other parameters such as reducing pulse width or increasing pulse intervals, maintaining the necessary temperature control while achieving the desired micropore characteristics.
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 system achieves efficient micropore creation for enhanced transdermal delivery of active pharmaceuticals, minimizing pain and filament failure by precisely controlling energy parameters.
Implementation Method 1
the skin may be ablated using metallic filaments brought to a high temperature by providing electrical energy through the metallic filaments
Implementation Method 2
Fast introduction of the thermal energy into the skin causes a rapid increase in a temperature of one or more outer layers of the skin and results in ablation of at least a portion of the skin
Data Source
AI summary
Systems and methods for controlling energy delivered for thermal ablation. An apparatus may include a conductive member comprising an array of conductive filaments, a power supply configured to provide the current to the conductive/resistive member in a plurality of electrical pulses, and a processing circuit coupled to the power supply. The processing circuit is configured to control the supply current value to be greater than or equal to a first current density and less than or equal to a second current density, and control the pulse length to be greater than or equal to a first pulse length and less than a second pulse length, control the supply current value to have a third current density at a first time and a fourth current density at a second time.