Hand Hygiene and Surgical Scrubbing Techniques

The Chain of Infection in Maternity Care

Infection control in the maternity unit centers on breaking the links that allow microorganisms to pass from one person to another. The chain consists of six interdependent elements: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host. In labor wards and postnatal floors, mothers and newborns represent highly vulnerable hosts due to surgical wounds from cesarean sections, perineal tears, and immature immune systems.

Transmission happens most frequently through healthcare workers' hands. A midwife touching an infected wound and immediately assisting another client without proper decontamination bridges the portal of exit to a new portal of entry. Interrupting this chain at the level of transmission is the single most effective way to prevent postpartum and neonatal infections.

Clinical Hand Hygiene Standards

Hand hygiene encompasses both routine handwashing with soap and water and the use of alcohol-based hand rubs. Routine handwashing mechanically removes dirt, organic material, and transient flora through friction and rinsing. Alcohol-based hand rubs destroy most vegetative bacteria, fungi, and enveloped viruses quickly without needing water.

Technique matters just as much as the product used. Every part of the hand must make contact with the cleanser—palms, dorsum, between fingers, thumbs, knuckles, and wrists. The entire process for soap and water should take forty to sixty seconds, while alcohol rubs require twenty to thirty seconds until the hands feel completely dry.

Indications for Handwashing vs. Alcohol Rubs

Choosing between soap and water and an alcohol-based rub depends on the clinical situation. Alcohol rubs are the preferred method for routine clinical tasks because they are faster, cause less skin dryness, and are more accessible at the bedside.

• Soap and water: Mandatory when hands are visibly dirty, visibly soiled with blood or other body fluids, or after caring for patients with known infectious diarrhea like rotavirus or Clostridioides difficile.
• Alcohol-based hand rub: Recommended for all other clinical situations where hands are not visibly soiled, such as before touching a patient, before clean or aseptic procedures, and after body fluid exposure risk.

Understanding Surgical Asepsis in Obstetrics

Surgical asepsis, or sterile technique, aims to eliminate every single microorganism from an area or object. Unlike medical asepsis which reduces the overall number of germs to prevent spread, surgical asepsis creates a sterile field where zero living microbes should exist.

In maternity practice, surgical asepsis is non-negotiable during cesarean sections, primary surgical repair of third and fourth-degree perineal tears, and internal examinations during the immediate surgical suite phase. A single break in this sterile barrier introduces bacteria directly into the pelvic cavity or deep muscle layers, leading to severe postpartum endometritis, wound dehiscence, or systemic sepsis.

Surgical Scrubbing Techniques

The surgical scrub is a specialized, time-intensive cleansing protocol performed before entering the operating theater. The goal is to reduce the resident skin flora and temporarily suppress transient flora for the duration of the procedure.

1. Preparation: Remove all jewelry, watches, and badges. Inspect hands for cuts or abrasions; open cuts may disqualify a staff member from scrubbing.
2. Initial Wash: Wet hands and forearms, applying antimicrobial soap to wash thoroughly up to the elbows.
3. Nail Cleaning: Use a sterile disposable nail pick under running water to clean subungual spaces.
4. Scrubbing Action: Using a scrub brush or sponge, scrub each finger, the palm, the back of the hand, and the forearm systematically in a circular motion. Always scrub from fingertips toward the elbows.
5. Rinsing: Rinse by passing hands and arms through the water in one direction only—fingertips up, elbows down—so dirty water drips off the elbow, never back down to the clean hands.

Maintaining Sterile Integrity After the Scrub

Completing a surgical scrub does not mean hands are permanently sterile. The skin continuously releases bacteria from deep sebaceous glands and hair follicles, making post-scrub management vital.

After rinsing, hands must be kept elevated above the waist and away from the body at all times. Drying requires a sterile towel, using a separate corner for each arm with a blotting motion rather than rubbing. When donning sterile gowns and gloves, hands must never slip outside the gown cuffs until the gloves are securely in place. If a sterile glove touches any non-sterile surface—such as an unsterile gown, table edge, or mask—it is immediately contaminated and must be replaced.