SU14.{1,4} | Asepsis, Sterilization and Surgical Field Practice — Summary & Reflection

KEY TAKEAWAYS

Asepsis — keeping the operative field free of microorganisms — is the surgeon's most powerful, preventable defence against surgical site infection. Learn the terms precisely: sterilization destroys all microbes including spores; disinfection removes most pathogens but may spare spores; antisepsis is disinfection of living tissue. The Spaulding classification assigns the required level — critical items (sterilize), semi-critical (high-level disinfection), non-critical (low/intermediate disinfection). Methods are physical (autoclave 121 degrees C / 15 psi / 15 min; dry-heat oven ~160 degrees C; filtration; radiation) and chemical (ethylene oxide, glutaraldehyde) for heat-sensitive items. Every cycle is monitored by physical, chemical (incl. Bowie-Dick) and biological indicators, the last being the gold standard. Field practice — timed scrub, sterile gown, closed gloving, skin prep from the centre outwards, draping and field discipline — plus basic suturing is demonstrated and mastered in simulation before it reaches a patient.

REFLECT

Think about the last time you watched a procedure or a scrub-up — a minor operation, a catheter insertion, a dressing in a simulated lab. Could you now classify each instrument by its Spaulding category and state the reprocessing it needed? When you next scrub, gown and glove in simulation, watch your own hands: where exactly does the sterile zone of your gown begin and end, and at which moments are you most likely to contaminate it? Reflect on one habit you will deliberately build now — keeping hands in view above the waist, or never reaching across the field — so that asepsis becomes automatic before you operate on a real patient.