The application of vinyl silicone oil in surgical instrument coatings is mainly to reduce the friction between instruments and human tissues through its lubricity and biocompatibility, thereby improving the convenience and safety of surgical operations. The specific mechanism for reducing friction is as follows:

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1. Lubrication performance
Vinyl silicone oil has excellent lubricity and can form a uniform thin film on the surface of surgical instruments. This layer of film can significantly reduce the friction coefficient between the instrument and human tissue. For example, uncoated medical device surfaces (such as PEBAX materials) typically have a high coefficient of friction (CoF) of approximately 1.0-1.2. After coating with vinyl silicone oil, the friction coefficient can be reduced to around 0.13. This low friction coefficient makes the instrument move more smoothly in human tissue, reducing damage to the tissue.


2. Surface modification
Vinyl silicone oil coating can be uniformly applied to the surface of instruments through specific coating processes such as immersion coating or spray coating, forming a stable lubricating layer. This coating not only reduces the roughness of the instrument surface, but also reduces the direct contact between the instrument and tissue, thereby further reducing friction.


3. Biocompatibility
Vinyl silicone oil has good biocompatibility and will not cause adverse reactions to human tissues. This characteristic enables it to exist stably on the surface of medical devices for a long time without being rejected or degraded by human tissues. Therefore, the ethylene based silicone oil coating can continue to function during the surgical process, reducing friction.


4. Reduce particle shedding
Compared with traditional lubricants such as Vaseline or liquid silicone oil, vinyl silicone oil coating has stronger adhesion on the surface of instruments and is less prone to detachment. This not only reduces the shedding of particles during the surgical process, but also avoids potential complications caused by particles entering the human body cavity.


5. Durability
The lubricating layer formed by the vinyl silicone oil coating on the surface of surgical instruments has high durability. Even under repeated friction and use, the coating can still maintain its lubrication performance. This durability is particularly important for surgical instruments that require long-term operation, ensuring that the instruments remain in a low friction state throughout the entire surgical process.


6. Comparison with other coatings
Compared with other lubricating coatings such as polytetrafluoroethylene (PTFE), ethylene based silicone oil coatings exhibit better lubrication and durability in certain application scenarios. For example, although PTFE coating has a low coefficient of friction, its adhesion to the surface of the instrument is weak, making it prone to wear or detachment during complex operations. The ethylene based silicone oil coating is firmly attached to the surface of the instrument through chemical bonding or physical adsorption, providing better stability and durability.


7. Practical application cases
In practical applications, vinyl silicone oil coatings are widely used for surface treatment of medical devices such as catheters, guide wires, and surgical instruments. For example, in vascular angioplasty catheters and neurovascular microcatheters, the ethylene based silicone oil coating significantly reduces the friction of the instruments while reducing particle detachment. This coating not only improves the efficiency of surgery, but also reduces damage to patient tissues and enhances patient comfort.


summary
The ethylene based silicone oil coating significantly reduces the friction between surgical instruments and human tissues due to its excellent lubricity, biocompatibility, and durability. This coating not only improves the convenience and safety of surgical operations, but also reduces the occurrence of tissue damage and complications caused by friction. Therefore, the application of vinyl silicone oil coating in medical devices has important clinical significance.