Pulsed RF Cannula for Isolated Fat Coagulation
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Solution Overview
Problem
Existing minimally invasive methods for fat destruction and skin tightening using RF energy often result in mechanical damage and the risk of seroma and skin burns due to whole-layer coagulation, requiring skilled techniques and a long learning curve.
Innovation Solution
A minimally invasive device with a cannula delivering pulsed RF energy to create isolated coagulation zones in subcutaneous fat, utilizing a monopolar or bipolar configuration with adjustable RF parameters and a temperature sensor to control energy delivery, minimizing skin damage and allowing for precise tissue treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CW or quasi-CW RF energy is delivered to coagulate a whole layer of fat, then fat destruction is achieved, but seroma and skin burn occur requiring skilled techniques and a long learning curve
Solution Approach 1:
The patent segments the fat layer into multiple discrete coagulation zones by delivering RF energy in pulsed mode through a moving cannula. Instead of treating the entire fat layer at once (CW mode), the system creates multiple isolated coagulation points that collectively achieve fat destruction while distributing thermal stress, thereby preventing seroma and skin burn.
Solution Approach 2:
The patent employs periodic pulsed RF energy delivery instead of continuous CW energy. The cannula is moved through the fat layer while delivering energy in pulses, creating a series of discrete coagulation zones. This periodic action allows heat to dissipate between pulses, preventing thermal accumulation that causes skin burn and seroma.
2Object-affected harmful factors
If pulsed RF energy is delivered through a moving cannula to create isolated coagulation zones, then mechanical damage to skin is reduced, but treatment time increases
Solution Approach 1:
The patent segments the treatment into multiple discrete coagulation zones created by the moving cannula. Each pulse creates a small isolated zone, and the cannula is moved to create the next zone. This segmentation allows the skin to be spared from thermal damage while still achieving comprehensive fat treatment through the cumulative effect of multiple zones.
Solution Approach 2:
The patent employs dynamic movement of the cannula through the fat layer while delivering pulsed RF energy. The cannula is moved continuously or in sequences to create multiple coagulation zones across the treatment area. This dynamic approach distributes the thermal load over time and space, protecting the skin while maintaining treatment effectiveness.
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 effective adipose tissue destruction and collagen remodeling with reduced mechanical damage, preserving a smooth skin surface and allowing for customizable coagulation zone sizes, thereby minimizing risks associated with whole-layer coagulation.
Implementation Method 1
radio-frequency (RF) energy is applied to the cannula tip... The RF energy density is high enough to create damage to the adipose tissue, which results in coagulation of adipose tissue
Implementation Method 2
The RF energy is delivered in a pulsed manner to create isolated coagulation zones during cannula movement... which achieves the same effect as a large treatment volume but without the risk
Data Source
AI summary
A method for thermal fat destruction and tightening includes delivering RF energy into adipose tissue under a skin surface to create thermal damage of fat, to cause an alteration of the overlying soft tissue contour and to heat connective tissue to cause collagen contraction. The method includes cannula movement and pulsed RF energy delivery to create a matrix of isolated coagulation zones inside the tissue.