Why do we scrub instruments with soap and water prior to autoclaving?

Scrubbing instruments with soap and water prior to autoclaving is critical for several reasons, but the primary purpose is to remove coagulated proteins. During procedures, blood and other bodily fluids can coagulate and adhere to instruments. If these materials are not thoroughly cleaned off, they can interfere with the sterilization process and may shield bacteria from the steam and heat of the autoclave.

By using soap and water, medical professionals ensure that all organic materials are dislodged from the instruments, allowing the autoclave to effectively penetrate and sterilize all surfaces. This step is essential in infection control and maintaining a sterile environment, which is vital for patient safety.

While enhancing the autoclave's effectiveness can be a result of proper cleaning, the direct and immediate need is to remove organic matter like coagulated proteins. Other choices imply different reasons that do not address the critical step of effective cleaning prior to steam sterilization, which could lead to ineffective sterilization if not carried out correctly.