Cryogenic Skin Treatment Using High Thermal Effusivity Cooling Plate
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Solution Overview
Problem
Current cosmetic methods for lightening skin pigmentation are often ineffective and can cause unintended hyperpigmentation or require invasive procedures, with existing cryosurgery techniques leading to severe tissue damage and unpredictable results.
Innovation Solution
A non-invasive cosmetic method and apparatus using a cooling plate with high thermal effusivity, capable of controlled cooling and freezing of skin tissue to induce hypopigmentation, employing a cooling arrangement with a refrigerant or Peltier device to maintain specific temperatures and prevent excessive cooling, allowing for safe and gradual skin lightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cryosurgery techniques are used to freeze skin tissue, then pigmentation can be affected, but severe tissue damage and cellular damage occur
Solution Approach 1:
The patent applies parameter changes by precisely controlling temperature parameters during cryogenic treatment. Instead of using extreme freezing temperatures that cause severe tissue damage, the system maintains the skin surface temperature within a controlled range (below 0°C but above freezing point of deep tissues) to affect pigmentation while preserving tissue integrity. This is achieved through controlled cooling rates, temperature monitoring, and regulated treatment duration.
Solution Approach 2:
The patent implements feedback control through temperature sensors that continuously monitor the skin surface temperature during treatment. The system uses this real-time temperature data to adjust the cooling power dynamically, ensuring the temperature remains within the safe therapeutic window. This feedback mechanism prevents both insufficient pigmentation effect and excessive tissue damage by automatically modulating the cooling intensity.
2Reliability
If moderate freezing is applied to affect skin pigmentation, then cosmetic lightening effect is achieved, but control precision is difficult to maintain
Solution Approach 1:
The system employs real-time temperature feedback control with sensors positioned to monitor skin surface temperature during treatment. The control system processes this temperature data and dynamically adjusts the cooling power to maintain the temperature within the precise therapeutic window required for cosmetic pigmentation lightening without causing damage.
Solution Approach 2:
The patent replaces manual mechanical control of cooling intensity with an automated electronic control system. Instead of relying on operator skill to manually regulate cooling, the system uses electronic temperature sensors and control algorithms to automatically maintain precise temperature control, thereby achieving consistent cosmetic results without requiring expert manual intervention.
3Ease of operation
If existing cosmetic formulations are used to lighten skin, then application is simple, but effectiveness is questionable
Solution Approach 1:
The patent replaces chemical formulations with a physical cryogenic treatment system. Instead of applying topical lightening agents that require prolonged contact time and show variable results, the system uses controlled cooling to directly affect pigmentation through thermal mechanisms, providing more reliable and predictable cosmetic outcomes.
4Reliability
If cryosurgery procedures are performed to achieve hypopigmentation, then pigmentation lightening occurs, but treatment time and recovery period are extended
Solution Approach 1:
The patent optimizes treatment time by changing the temperature parameters and cooling intensity profile. Instead of prolonged freezing at extreme temperatures that require long recovery, the system uses controlled cooling at moderate sub-zero temperatures for shorter durations, achieving effective pigmentation lightening while reducing both treatment time and recovery period.
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 method achieves long-lasting or permanent lightening of skin areas with controlled cooling, reducing the risk of tissue damage and allowing for safe, non-invasive treatment of large skin areas with precise temperature control, ensuring effective and safe skin lightening.
Implementation Method 1
employing a cooling arrangement with a refrigerant or Peltier device to maintain specific temperatures
Implementation Method 2
A non-invasive cosmetic method and apparatus using a cooling plate with high thermal effusivity, capable of controlled cooling and freezing of skin tissue
Implementation Method 3
using a cooling plate with high thermal effusivity, capable of controlled cooling and freezing of skin tissue
Implementation Method 4
capable of controlled cooling and freezing of skin tissue to induce hypopigmentation
Data Source
AI summary
Cosmetic method and apparatus are provided that can provide cooling and/or freezing of skin tissue proximal to the skin surface to generate an appearance of lightening or reduced pigmentation in the skin. The skin can be cooled to a temperature of less than about −5 degrees Celsius for a duration of about one minute or less, using a cooled surface that is at least 3 cm in width. A cooling arrangement can be provided to provide controlled heat removal from the skin tissue being treated. A sensor can optionally be provided to detect freezing of tissue proximal to the cooled surface.