The primary purpose of an enzyme surgical instrument cleaner is to remove all inorganic and organic bioburden material from the internal and external surfaces of surgical instruments and endoscopes. The secondary purpose of cleaning surgical instruments and scopes is to maintain and improve the passive Layer of stainless steel.
The passive layer is provided by the manufacturer of surgical stainless steel to resist (prevent) corrosion. Proper cleaning of surgical instruments prior to sterilization will maintain and improve this passive layer. If the manual cleaning of surgical instruments, brushing and rinsing steps are not properly carried out, protein debris can harden and lead to formation of biofilm. The optimal cleaning of surgical instruments prior to sterilization will break down bioburden and clean the surface. Inadequate cleaning surgical of instruments can thus result in material remaining on the surfaces which prevents disinfection and sterilization fluids or gases reaching all parts of potentially contaminated surfaces.
Sterilization of an inadequately cleaned instrument is not possible. Cleaning is the prerequisite for sterilization. All disinfection processes, whether done manually or done automatically in a surgical instrument washer can only be effective if prior cleaning is adequate. High level enzymatic formulations (Enzymatic Surgical Instrument Cleaners), in combination with a high level surfactant detergent chemical complex, have been shown to be more effective in removing stains, hard water deposits, and encrusted bioburden. Manufacturers of surgical instruments recommend the use of neutral pH enzyme detergent cleaners. Neutral pH enzyme surgical instrument cleaner detergent concentrates have been shown to be effective in optimizing the efficacy of the passive oxide layer. This will provide a longer life for stainless steel surgery instruments. Cleaning concentrates with a high or low pH have been shown to erode the passive layer. The most common of these cleaning concentrates utilize an alkaline detergent with an acid neutralizer. Virtually all manufacturers of surgical instruments recommend using a neutral ph detergent for cleaning surgical instruments prior to sterilization.