Aseptic technique Flashcards
sepsis - define
pathogens +/- toxic substances in tissue
asepsis - define
absence of pathogenic microbes in tissue
antisepsis - define
prevention of sepsis by destruction/inhibition of microorganisms
antiseptic - define
chemical that kills/inhibits pathogens - applied to the body
disinfectant - define
chemical that kills/inhibits pathogens - applied to inanimate objects
sterilisation - define
complete elimination of microbial viability, incl spores, physically/chemically
chlorhexidine
kills broad spec of bacteria - no spores, variable for viruses
rapid initial kill + residual activity
iodine
kills bacteria, viruses, fungi - not spores
use on mucosal surfaces - not near open wounds
corrodes instruments + can cause contact dermatitis
alcohol
kills broad spec of bacteria
enhances effect of chlorhexidine + iodine
corrodes instruments
closed gloving
in most surgeries
needs long sleeve gown
gloves must cover cuff of gown
open gloving
procedures that only need sterile hands
methods of sterilisation of instruments
physical - heat, irradiation, filtration
chemical - ethylene oxide, disinfectants
surgical infection - bacterial factors
presence, growth + no. of bacteria
type + virulence
duration of exposure
nature of contamination
surgical infection - surgical factors
duration + technique preparation dead space + seroma foreign material blood clots devitalised tissue
surgical infection - host risk factors
age
nutritional status
disease conditions
therapy
