Plasma-Deposited PDMS Coating for Electrosurgical Sealing Plates
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Solution Overview
Problem
Existing electrosurgical instruments face challenges in reducing tissue sticking to sealing plates during energy application while maintaining effective tissue sealing and sensing of tissue parameters.
Innovation Solution
A polydimethylsiloxane coating with a controlled thickness of 35 nm to 85 nm is applied to the electrosurgical instrument's tissue sealing plates using plasma-enhanced chemical vapor deposition, reducing tissue sticking and allowing for proper electrical performance and tissue parameter sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a non-stick coating is applied to the sealing plate to reduce tissue sticking, then tissue sticking is reduced, but electrical performance and tissue parameter sensing may be interfered with
Solution Approach 1:
The patent applies a thin polymeric organosilicon coating with controlled thickness (35-85 nm) to reduce tissue sticking while maintaining electrical performance. By precisely controlling the coating thickness parameter, the solution achieves non-stick properties without creating a barrier thick enough to interfere with electrical energy delivery or tissue parameter sensing, thus resolving the contradiction between reducing tissue sticking and maintaining electrical reliability
Solution Approach 2:
The patent uses a composite structure combining a metal sealing plate substrate with a thin polymeric organosilicon coating layer. This composite material approach allows the sealing plate to maintain its inherent electrical conductivity and thermal properties from the metal substrate while the thin polymeric layer provides non-stick characteristics, thus achieving both reduced tissue sticking and maintained electrical performance
2Object-generated harmful factors
If a thick non-stick coating is applied to reduce tissue sticking, then tissue sticking is reduced, but tissue parameter sensing is interfered with
Solution Approach 1:
The patent precisely controls the coating thickness parameter within the range of 35-85 nm, which is thin enough to allow electrical energy to pass through and tissue parameters to be sensed accurately, while still providing sufficient non-stick properties. This precise parameter control resolves the contradiction between achieving non-stick performance and maintaining measurement precision
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 coating effectively reduces tissue sticking and maintains the instrument's ability to perform tissue sealing and sensing, preventing eschar buildup and ensuring efficient operation.
Implementation Method 1
A polydimethylsiloxane coating with a controlled thickness of 35 nm to 85 nm is applied to the electrosurgical instrument's tissue sealing plates using plasma-enhanced chemical vapor deposition
Data Source
AI summary
A method for applying a polydimethylsiloxane coating having a thickness in the range of from about 35 nm to about 85 nm on a tissue sealing plate. The method includes: placing the electrically conductive component into a plasma deposition chamber; supplying an ionizable media into the plasma deposition chamber; igniting the ionizable media to generate a first plasma at a first power level to prepare the electrically conductive component to receive the coating; supplying the ionizable media and a precursor composition into the plasma deposition chamber; and igniting the ionizable media and the precursor composition to generate a second plasma at a second power level thereby forming the coating on the electrically conductive component.