Study On The Preparation And Properties Of Medical Anti-adhesion Conductive Surfaces

Electrosurgical scalpel has been widely used in medical field because of its high cutting efficiency,neat tissue cutting and less bleeding.However,in the process of surgery,dehydrated scabby blood or soft tissue easily adhere to the surface of the scalpel,which will bring safety risks.At present,many anti-adhesion methods have been proposed by scholars at home and abroad,but these methods have some problems such as poor biocompatibility and poor electrical conductivity.In order to solve the above problems,this paper proposed the preparation method of medical anti-adhesion superhydrophobic and super-slippery conductive surfaces inspired by the superhydrophobic and super-slippery surfaces in nature,and explored the related properties of the prepared surfaces.The main contents include:An anti-adhesion super-slippery conductive surface preparation method was proposed for high frequency electrotome,electric shovel and other electrosurgical scalpels with flat surface and regular shape.Nano-hydrophobic ceramic coating,medical silicone oil and multi-walled carbon nanotubes were prepared into a mixture of coatings,and the anti-adhesion super-slippery conductive surface was prepared by immersion coating method on high frequency electrotome.The optimal ratio and process parameters of the coating were determined by single factor tests.The sliding angle was about 9° under the optimum ratio and parameters,which had good superslippery performance.The microstructure and chemical composition of the surface were analyzed,and the formation mechanism of super-slippery property was studied.An anti-adhesion superhydrophobic conductive surface preparation method was proposed for bipolar electrocoagulation tweezers,hooks,electroneedles and other electrosurgical scalpels with irregular shape and difficult to form uniform coating on the surface.An anti-adhesion superhydrophobic conductive surface was constructed on bipolar electrocoagulation tweezers by laser etching and low surface energy modification.The optimum process parameters of laser etching were determined by single factor tests.The contact angle was about 159.8° and the rolloff angle was about 1°,which had good superhydrophobic properties.The formation mechanism of superhydrophobicity was studied by analyzing the surface morphology and chemical composition.In order to study the application value of anti-adhesion superhydrophobic and super-slip conductive surfaces,the properties of anti-blood adhesion,anti-tissue adhesion and electrical conductivity of the prepared surfaces were tested.The results showed that the adhesion of blood and tissue on the surface of superhydrophobic electrotome and super-slippery electrotome were significantly reduced compared with that of ordinary electrotome,and the mass of tissue decreased by 75.64% and 58.06%,respectively.The resistance value of superhydrophobic and super-slippery electrotome were about 1.1 Ω and 4.5 Ω,which had good electrical conductivity.After stored at 5℃ for two weeks,the electrotome still had good anti-blood adhesion property,showing promising application prospect in the medical field.