antisepsis

ANTISEPSIS

main principles

Student: Saadia Mangoo

"A system of prophylactic and therapeutic measures aimed at destroying the MO's in a wound, pathological tissues or the body as a whole."

DEFINITION OF ANTISEPSIS

main principles

Used to decrease rate of SSI's

Surgical Ward

Sources of infection:

Patient

• Exogenous
• Endogenous

Surgical Instruments

Surgeon

Operating Theatre

Pathway of entry for Mo's

Surgical Ward

• Pre-op
• nasal / from ward
• Intra-op
• inadequate prep / surgeon / PPE
• Post-op
• dressing not sterilised

• HCAI
• Hygiene
• Dress code

patient prep

• Pre-op assessment
• Short stay
• Clean gown and trolley
• Shaving
• Skin prep: idophors and chlorhexidine
• Surgical drapes: resusable, disposable, adhesive

surgical instruments

Cleaning and Disinfection

Sterilization

Cleaning removes organic debris Disinfection destroy MO's but not spores

Sterilization destroys MO's and spores

• Steam (autoclave):
• 132 degrees/2atm/20min
• 120 degrees/1.1atm/45min

• Dry heat: 160 degrees / 2h
• Formaldehyde EO steam
• Irradiation
• ionizing - gamma
• non-ionizing - infrared/UV

• Low-level
• Intermediate-level
• High-level

surgeon prep

OPERATING THEATRE

Regulated temperature and humidity. External ventilation that changes a few times per hour. Air is disinfected via UV bactericide lamp.

• Hand washing
• Hand disinfection
• classical methods (Alfred, Furbringer, Spasokukotsky-Kochergin)
• quick methods
• Gloves, masks, visors, hair covers, gowns

Thanks for your attention

Any questions?