Coated Surgical Instruments Corrosion Resistance and Identification
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Solution Overview
Problem
Surgical instruments made from metals like stainless steel face corrosion issues due to repeated handling and cleaning processes, making them difficult to identify and maintain effectively during procedures.
Innovation Solution
Coated surgical instruments with multiple layers, including a corrosion-protection layer and a distinctive outer layer for easy identification, are developed using vapor deposition techniques, providing enhanced corrosion resistance and visual differentiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If surgical instruments are made from stainless steel, then they are durable and can be reused, but they corrode quickly due to repeated handling and cleaning processes
Solution Approach 1:
The patent applies composite materials by coating stainless steel surgical instruments with multiple layers including a corrosion-protection layer (such as chromium, hafnium, titanium, or niobium) and a distinctive outer layer. This composite structure combines the durability and reusability of stainless steel with enhanced corrosion resistance and visual identification capabilities, resolving the contradiction between instrument longevity and corrosion resistance.
2Duration of action of stationary object
If surgical instruments are made from stainless steel, then they are durable, but they have the same silver color making them difficult to identify and distinguish
Solution Approach 1:
The patent applies color changes by incorporating a distinctive outer layer with specific color properties (such as black, blue, or other distinguishable colors) over the corrosion-protection layer. This allows medical personnel to quickly and easily visually identify and select the desired instrument from the tray, resolving the contradiction between instrument durability and visual identifiability.
3Loss of substance
If hospitals clean and reuse surgical instruments, then costs are reduced, but the cleaning and sterilization processes shorten the instrument's useful life
Solution Approach 1:
The patent applies preliminary anti-action by pre-coating surgical instruments with corrosion-protection layers before they enter service. This protective coating acts in advance to counteract the corrosive effects of cleaning and sterilization processes, allowing the instruments to withstand repeated cleaning cycles without degrading, thus extending their useful life while maintaining cost-effectiveness through reuse.
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 coated instruments exhibit improved corrosion resistance and are easier to identify, reducing procedural time and risk by extending the lifespan of surgical instruments.
Implementation Method 1
a first vapor deposition system can be used to sequentially deposit the first metal layer and the corrosion-protection layer onto the surgical instrument
Data Source
AI summary
A coated medical instrument can include a first layer bonded to a metal substrate surface of a medical instrument, a second layer bonded to the first layer, and a third layer disposed on the second layer, The first layer comprises chromium (Cr), hafnium (Hf), titanium (Ti), and/or niobium (Nb). The second layer comprises a nitride, oxide, carbide, carbonitride, or boride of chromium (Cr), hafnium (Hf), niobium (Nb), tungsten (W), titanium (Ti), aluminum (Al), zirconium (Zr), and/or silicon (Si). The third layer comprises a nitride, oxide, carbide, boride, oxynitride, oxycarbide, or oxycarbonitride of chromium (Cr), hafnium (Hf), niobium (Nb), tungsten (W), titanium (Ti), aluminum (Al), zirconium (Zr), and/or silicon (Si). Methods for making coated medical instruments are also disclosed herein.