RF Microneedle Cooling Duct for Epidermal Heat Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing RF microneedle systems lack effective cooling mechanisms to manage heat generated by RF excitation, leading to potential epidermal damage and discomfort during skin rejuvenation treatments.
Innovation Solution
A cooling duct system is integrated with the microneedle handpiece, delivering cooled gas through a nozzle that surrounds the microneedle housing and directs cooled air both longitudinally and radially into slots within the housing to cool the microneedles and the skin surface, providing enhanced 360-degree cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RF energy is delivered through microneedles to achieve fractional dermal ablation, then collagen growth and skin rejuvenation are promoted, but heat is generated that can cause epidermal damage and patient discomfort
Solution Approach 1:
The cooling system is segmented into multiple independent channels: a first cooling channel delivers coolant to the microneedle array, while a second cooling channel delivers coolant to the treatment area. This segmentation allows simultaneous cooling of both the heated microneedles and the epidermal surface, resolving the contradiction between RF heating effectiveness and epidermal protection
Solution Approach 2:
A coolant (intermediary substance) is introduced as a mediator between the RF energy source and the epidermal tissue. The coolant absorbs excess heat through the cooling channels, preventing direct thermal damage to the epidermis while allowing the RF microneedles to generate sufficient heat for collagen stimulation in the dermis
2Object-affected harmful factors
If aggressive cooling approaches are used to protect the epidermis from heat injury, then epidermal damage is reduced, but the microneedle heating effectiveness is compromised
Solution Approach 1:
The cooling system is divided into separate channels: the first cooling channel is dedicated to cooling the microneedle array, while the second cooling channel cools the epidermal surface. This segmentation enables independent control of cooling intensity for each target, allowing the microneedles to maintain sufficient temperature for effective collagen stimulation while the epidermis receives protective cooling
Solution Approach 2:
Different cooling intensities and approaches are applied to different locations: the microneedle array receives cooling through conductive contact via the first channel, while the epidermal surface receives cooling through the second channel. This local differentiation allows optimization of temperature for each specific purpose - maintaining microneedle efficacy while protecting the epidermis
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 enhanced cooling system reduces discomfort and minimizes epidermal heat injury, improving patient comfort and safety during RF microneedle treatments.
Implementation Method 1
a cooling duct in communication with the nozzle such that the cooled gas may be supplied through the cooling duct to the nozzle
Implementation Method 2
an RF source in the system excites the microneedles with RF energy to cause an RF current to conduct from the microneedles. The targeted tissue has an Ohmic resistance to this current that causes electrothermal damage
Data Source
AI summary
An RF microneedle system is provided with a cooling duct that at least partially surrounds a circumference of a microneedle housing. Depending upon how much circumference is surrounded by the nozzle determines the cooling coverage. For example, if the nozzle surrounds the entire circumference, 360 degrees of cooling coverage is provided. In addition, the nozzle is configured to direct cooled air into at least one slot in the microneedle housing to cool the array of microneedles.