Plasma Feedback Detection for Precise Dermal EMR Treatment Depth
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Solution Overview
Problem
Current treatments for dermal melasma and other pigmentary disorders face challenges in accurately targeting the dermal layer while minimizing damage to the epidermal layer, with existing EMR-based systems struggling to achieve precise focal region depth and effective plasma detection for safe and efficient treatment.
Innovation Solution
An EMR-based treatment system with high numerical aperture optics and real-time plasma detection capabilities, utilizing a window for reference and stabilization, enables precise focal region placement within a tolerance of tens of micrometers and continuous monitoring of plasma formation to ensure safe and effective treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical energy is applied to target pigmented cells in the dermis, then the pigmented cells can be damaged and disrupted, but excessive absorption by pigment in the overlying epidermis and upper dermis causes excessive damage to the outer skin and insufficient energy delivery to the deeper dermis
Solution Approach 1:
The system employs real-time feedback detection of plasma formation during treatment. A detector monitors for plasma generation at the focal region, providing feedback to the controller that adjusts treatment parameters. This ensures energy is delivered precisely to the intended depth in the dermis without excessive absorption in the epidermis, resolving the contradiction between achieving sufficient penetration and avoiding superficial damage.
Solution Approach 2:
The system dynamically changes treatment parameters including wavelength selection, pulse duration, and energy flux density based on real-time detection. By adjusting these parameters, the system optimizes energy penetration depth to reach dermal pigmented cells while minimizing absorption and damage to the epidermal layer, thus resolving the depth control contradiction.
2Manufacturing precision
If moderate thermal injury is applied to melanin-containing melanocytes in the basal layer of the epidermis, then treatment can be achieved, but this triggers an increase in melanin production causing hyperpigmentation
Solution Approach 1:
Real-time plasma detection provides feedback that confirms when the focal region has reached the intended depth in the dermis. This prevents moderate thermal injury to epidermal melanocytes by ensuring treatment energy is delivered exclusively to the deeper dermal layer, avoiding the hyperpigmentation response that would result from epidermal heating.
Solution Approach 2:
The system performs preliminary depth verification by detecting plasma formation at the predetermined focal depth before delivering full treatment energy. This preliminary action ensures the focal region is correctly positioned in the dermis, preventing any thermal injury to epidermal cells that would trigger melanin overproduction.
3Ease of operation
If conventional skin rejuvenation treatments are applied that primarily affect the overlying epidermis, then the epidermal region can be treated, but these treatments are not effective in treating dermal melasma
Solution Approach 1:
The plasma detection feedback mechanism confirms that the focal region has penetrated to the predetermined depth in the dermis. This real-time verification ensures that treatment energy is delivered to the deeper dermal layer where melasma pigmented cells are located, making the treatment effective for dermal melasma while maintaining operational simplicity through automated depth control.
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 reliable focal region depth control and safe plasma detection, enhancing the efficacy of dermal pigmentation treatment by minimizing collateral damage to the epidermis and improving treatment outcomes for conditions like melasma.
Implementation Method 1
such energy can be absorbed by pigment (e.g., melanin) in the overlying skin tissue, such as the epidermis and upper dermis
Implementation Method 2
This near-surface absorption can lead to excessive damage of the outer portion of the skin
Implementation Method 3
generation of a plasma at a focal region within a tissue
Implementation Method 4
converging an electromagnetic radiation (EMR) beam to a focal region located at a predetermined depth within a tissue
Implementation Method 5
a detector configured to detect a signal radiation emanating from the plasma
Data Source
AI summary
A system includes a focus optic configured to converge an electromagnetic radiation (EMR) beam to a focal region located along an optical axis. The system also includes a detector configured to detect a signal radiation emanating from a predetermined location along the optical axis. The system additionally includes a controller configured to adjust a parameter of the EMR beam based in part on the signal radiation detected by the detector. The system also includes a window located a predetermined depth away from the focal region, between the focal region and the focus optic along the optical axis, wherein the window is configured to make contact with a surface of a tissue.