Non-Ablative Laser Tissue Regeneration Thermal Control
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Solution Overview
Problem
Current tissue regeneration methods face challenges in effectively heating deeper connective tissues without causing significant damage to superficial layers, as conventional techniques often rely on bypassing the superficial layer to thermally activate fibroblasts, and there is a limitation in achieving high temperatures due to heat diffusion and absorption by the epithelial layer.
Innovation Solution
The development of a laser-based apparatus that generates pulses with controlled energy delivery and penetration depth to heat the tissue surface to a maximal temperature between 70°C and boiling point without causing protein denaturation, using a thermal exposure time shorter than 900 microseconds, and a wavelength that penetrates to a depth of less than 30 micrometers to avoid damage and promote collagen production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional laser techniques are used to heat deeper connective tissues, then fibroblast activation is achieved, but the superficial epithelial layer suffers significant thermal damage
Solution Approach 1:
The patent segments the thermal treatment into two distinct phases: a first phase that heats the superficial epithelial layer to a first temperature, and a second phase that heats the deeper connective tissue to a second temperature. This temporal segmentation allows each layer to be heated independently, preventing the superficial layer from suffering thermal damage while still achieving fibroblast activation in the deeper tissues.
Solution Approach 2:
The patent employs periodic thermal action by alternating between heating the superficial layer and heating the deeper connective tissue. The method includes multiple cycles where the superficial layer is heated, then cooled, then the connective tissue is heated, creating a periodic thermal stimulus that activates fibroblasts without causing permanent damage to the epithelium.
2Productivity
If high temperatures are applied to activate fibroblasts, then collagen production is enhanced, but protein denaturation occurs in the tissue
Solution Approach 1:
The patent changes the temperature parameters dynamically during treatment. The superficial layer is heated to a first temperature that is sufficient to trigger regeneration but below the threshold for protein denaturation. The deeper connective tissue is heated to a second temperature that optimizes fibroblast activation. By carefully controlling temperature parameters and exposure times, the method enhances collagen production without causing protein denaturation.
3Temperature
If thermal energy is delivered to heat deeper tissues, then regenerative effect is achieved, but heat diffusion limits the temperature reach
Solution Approach 1:
The patent applies preliminary thermal action to the superficial epithelial layer before heating the deeper connective tissue. By first heating the superficial layer to a controlled first temperature and allowing it to cool, the method creates thermal conditions that facilitate subsequent heating of the deeper tissues. This preliminary action prevents excessive heat diffusion from reaching the superficial layer during the second heating phase.
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 allows for safe and intense thermal activation of superficial epithelia, triggering collagen production and regeneration without significant chemical damage, enabling effective tissue rejuvenation and repair by short-lived high temperature gradients.
Implementation Method 1
The apparatus comprises means for generating at least one laser pulse comprising a wavelength; and means for directing the at least one laser pulse onto a tissue surface
Implementation Method 2
the corresponding fluence on the tissue surface heats the tissue surface up to a maximal temperature Tmax
Implementation Method 3
a wavelength that penetrates to a depth of less than 30 micrometers to avoid damage
Data Source
AI summary
A treatment method for non-ablative tissue regeneration includes directing at least one laser pulse having a wavelength onto a tissue surface of a human or animal body, and controlling an energy delivery time ted of the at least one laser pulse, during which the second half of the pulse energy is delivered, to be sufficiently short, so that, given the wavelength and thus a corresponding penetration depth δ of the at least one laser pulse, a thermal exposure time texp of the tissue surface is smaller than 900 microseconds. The thermal exposure time texp of the tissue surface is defined as a time interval in which the temperature of the tissue surface is above T0+(Tmax−T0)/2, wherein T0 defines the initial temperature of the tissue surface, before the laser pulse arrives, and Tmax is a maximal temperature of the tissue surface.