MDRAO Practice Exam 2025 – Complete Exam Prep Resource

The primary purpose of instrument milk is to provide lubrication and rust inhibition for surgical instruments. This product is designed to create a protective barrier on the surface of the instruments after they have been cleaned, but before they are sterilized.

When instruments are thoroughly cleaned, they can still be susceptible to corrosion and damage, especially if they are made of metal. Instrument milk helps to prevent rust formation, which can occur due to moisture or the presence of certain chemicals found in cleaning solutions. Additionally, the lubrication it provides helps to maintain the mechanical function of instruments, particularly those with moving parts, ensuring they operate smoothly when used.

It's crucial to note that while instrument milk plays a supportive role in instrument maintenance, it does not serve as a sterilization agent, nor does it clean or disinfect the instruments. Instruments must be thoroughly cleaned and disinfected through appropriate protocols before application of the instrument milk and subsequent sterilization. Hence, its main function rests on the protection and care of the instruments post-cleaning and pre-sterilization.