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 These are
represented by infected sharp materials (needles, syringes, glassworks,
etc.) that must be collected in special cartons supplied with a spring
opening and a tip-up lid with irreversible closing and then disposed of
in containers for hospital treated waste.
Biological risk is determined by the presence, in the waste, of
micro-organisms capable of infecting workers involved in waste disposal
at all levels.
Infectious risk is linked only to some types of hospital special
waste such as microbiological waste, histopathological waste (tissue,
organs), blood and derivatives, sharp objects, animals' carcases and
anatomical pieces, all products that are largely sterilized before
disposal. Waste contamination by pathogenic micro-organisms is then not
sufficient to induce infection, as concurrence of other conditions, such
as infecting dose, germ virulence, penetration path, etc., is needed.
Infectious risks are generally the result of sharp injuries or
stab-wounds most frequently located on the hands, the forearms and the
lower limbs. These accidents may recognize different causes:
- careless manipulation of waste, carried out without the use of personal
protective devices,
- employment of containers unsuitable in size, resistance,
impermeability, closing,
- employment of incorrect conditioning techniques.
Chemical risk is due to the presence, in the waste, of chemical
substances deriving from hospital activities. The main compounds that may
be found in hospital waste include disinfectants (aldehydes, alcohol,
phenols, ammonium, etc.) and drugs (especially antitumoural drugs).
Finally, a traumatic risk can be identified in the shifting of waste
containers.
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