Variable Pulse Laser System for Controlled Dermal Heating
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Solution Overview
Problem
Current laser treatments for skin ailments, such as wrinkle reduction, often cause pain and side effects like redness due to inadequate temperature control, as they rely on linear temperature profiles and repetitive pulses, which fail to maintain the optimal temperature range of 39-45 degrees Celsius for effective collagen remodeling without overheating.
Innovation Solution
A method employing a handheld laser system that delivers variable pulse intensity, width, and time delay to quickly raise and maintain the dermal temperature between 39-45 degrees Celsius, using pre-defined pulsed beam parameters to ensure precise energy application and avoid temperature spikes, thereby promoting collagen remodeling and elastin formation without pain or collateral damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If linear temperature profiles and repetitive pulses are used, then treatment simplicity is maintained, but temperature control precision deteriorates causing pain and side effects
Solution Approach 1:
The patent applies dynamics by transitioning from static, uniform laser pulses to dynamic, variable pulses. The system continuously adjusts pulse parameters (energy, duration, interval) based on real-time temperature feedback, creating a living treatment protocol that adapts to tissue response. This resolves the contradiction by maintaining operational simplicity through automation while achieving precise temperature control through continuous parameter adjustment.
Solution Approach 2:
The patent implements feedback control by using temperature sensors to monitor tissue temperature during treatment and feeding this information back to the laser control system. The system compares actual temperature against target ranges (e.g., 39-45°C for collagen remodeling) and automatically adjusts subsequent pulse parameters. This closed-loop feedback mechanism simultaneously maintains ease of operation and achieves high temperature control precision, eliminating pain and side effects caused by overheating.
2Reliability
If high intensity laser pulses are used to achieve effective collagen remodeling, then treatment efficacy is improved, but temperature spikes cause pain and skin damage
Solution Approach 1:
The patent applies periodic action by using pulsed rather than continuous laser delivery. The system delivers laser energy in controlled pulses with specific duty cycles, allowing thermal diffusion during interpulse intervals. This periodic delivery pattern enables accumulation of therapeutic effect while preventing dangerous temperature spikes, thereby maintaining treatment efficacy while reducing pain and skin damage.
Solution Approach 2:
The system dynamically adjusts pulse parameters based on real-time temperature feedback. When approaching target temperature ranges for collagen remodeling (39-45°C), the system automatically reduces pulse energy or increases pulse intervals to prevent overheating. This dynamic adaptation ensures therapeutic efficacy is achieved without causing pain or skin damage from excessive temperature elevation.
3Reliability
If treatment time is extended to maintain optimal temperature, then collagen remodeling efficacy is improved, but treatment speed deteriorates
Solution Approach 1:
The patent applies continuity of useful action by maintaining the treatment zone within the optimal temperature window (39-45°C) for an extended duration through continuous pulsed laser delivery. Rather than using brief high-intensity pulses, the system delivers lower-intensity pulses continuously or near-continuously, keeping collagen in the remodeling temperature range for maximum efficacy while avoiding the need for repeated treatment sessions.
Solution Approach 2:
The system dynamically balances treatment duration and intensity to optimize both efficacy and speed. By using real-time temperature feedback, the system extends treatment time only when necessary to maintain temperatures within the therapeutic window, automatically reducing or pausing delivery when targets are achieved. This dynamic time-intensity management resolves the contradiction between extended treatment time for efficacy and treatment speed for productivity.
4Manufacturing precision
If variable pulse parameters are used to control temperature precisely, then temperature control precision is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by implementing automated feedback control where the system monitors its own performance and self-adjusts parameters without external intervention. Temperature sensors continuously monitor the treatment zone, and the control system automatically modifies pulse parameters to maintain target temperatures. This self-regulating mechanism achieves high temperature control precision while minimizing the need for complex manual control interfaces or multiple separate devices.
Solution Approach 2:
The system uses feedback control to simplify complexity management. By continuously monitoring temperature and automatically adjusting pulse parameters based on real-time data, the system replaces complex manual parameter adjustment with straightforward automated control. The feedback loop handles the computational complexity internally, presenting a simple operational interface to the user while achieving precise temperature control through sophisticated parameter management.
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 approach enhances treatment efficacy, safety, speed, and comfort by maintaining the desired temperature for a longer duration, reducing skin damage and side effects, and is applicable for various skin types and conditions.
Implementation Method 1
Laser wavelengths are absorbed in the skin or in other tissues to provide limited localized damage
Implementation Method 2
The attributes of optical power, pulse width, time delay between pulses, and total number of pulses dictate the total time and total energy during a treatment cycle
Data Source
AI summary
A method for providing localized heating of the dermal layers of skin of a patient, using energy in the form of a group of pulses having defined parameters in a controlled manner. This method preferably uses an optical delivery system to deliver pulsed energy to a specific spot of skin so that targeted layers of the affected skin are heated to a desired temperature range. The temperature range is optimally selected to maximize treatment efficacy while minimizing pain to the patient. Example applications include reducing wrinkles, acne, hair, scar tissue, warts, and promoting wound healing. In this method, the temperature of the selected locus rises quickly to the desired temperature range, then is maintained within a controlled range with a relatively flat temperature profile. The method maintains the temperature by controlling one or more of a pulse energy intensity, pulse width, and pulse frequency or time delay between pulses.