Hand washing for surgery is the single most critical procedure for preventing surgical site infections, acting as the primary barrier against the introduction of pathogens into a sterile operative field. This process is not a simple routine task but a complex, evidence-based practice that requires strict adherence to a specific sequence of steps to achieve surgical hand antisepsis. The goal is a significant reduction in the microbial load on the hands and forearms, including the subungual region, where bacteria can hide, without causing excessive skin damage that could lead to dermatitis and increased shedding. Effective preparation protects both the patient from potentially life-threatening complications and the surgical team from exposure to hazardous microorganisms.
Understanding the Rationale Behind Surgical Hand Hygiene
The skin, even when meticulously cleaned, harbors a complex ecosystem of microorganisms, including resident flora that live on the skin surface and transient flora acquired from the environment. Standard handwashing with soap and water is insufficient for the demands of invasive procedures because it does not eliminate the hardy resident flora deep within the hair follicles and sweat glands. Surgical hand antisepsis is designed to destroy or significantly inhibit the growth of these microbes, creating a state of "surgical scrub" that maintains a low bioburden throughout the lengthy duration of an operation. This is why the process is far more rigorous than washing hands before a meal or after using the restroom.
Pre-Scrub Preparation and Protocol Selection
Before the actual scrubbing begins, meticulous preparation of the hands and arms is essential. This involves removing all jewelry, including rings, watches, and bracelets, as these can trap moisture and microorganisms, creating a nidus for bacterial growth and interfering with the integrity of gloves. Nails must be kept short and clean, as long nails harbor significant bacterial loads that are difficult to remove. The choice between an alcohol-based rub and a traditional surgical scrub solution depends on the healthcare facility's protocol, the type of procedure, and the condition of the hands. Alcohol-based hand rubs are generally preferred for their faster action, less irritating nature, and superior efficacy against many pathogens, but they require clean, dry hands and intact skin to be effective.
Steps for Alcohol-Based Hand Rub
When using an alcohol-based hand rub for surgical preparation, the technique is distinct from routine hand hygiene. The process begins with applying the product to the dry hands of a healthcare worker positioned at a safe height, ensuring the product can flow downwards without dripping onto the gown. The steps are as follows:
Apply the recommended amount of product into the palm of one hand.
Rub the palms together using a firm, vigorous rubbing motion.
Interlace the fingers of both hands to clean the interdigital spaces thoroughly.
Rotate and rub the backs of each hand with the palm of the other hand, ensuring coverage up to the wrist. Clasp each thumb sequentially in the opposite hand, rotating to clean the thumb completely.
Rub the fingertips of each hand against the palm in a circular motion to clean the nail beds.
Continue the rubbing process until the hands are completely dry, which typically takes between 2 to 3 minutes; drying time is a critical indicator of the product's contact time for microbial kill.
The Traditional Surgical Scrub Technique
In settings where an alcohol-based rub is not appropriate or historically, the traditional surgical scrub involves the use of a sterile brush and an antimicrobial soap. This method is more time-consuming and can be more harsh on the skin, but it remains a valid option. The objective is to use the brush to physically remove transient flora and disrupt the biofilm of resident flora from the nails and skin. The water temperature should be comfortable—not too hot, as this can cause vasodilation and increase the risk of dermatitis, and it should flow from the cleanest area (fingertips) to the least clean (elbows) to prevent recontamination.
