20
3.2 Program 2 (2 - WDry 273)
Program 2 is recommended for wrapped instruments, porous load and
other materials when the manufacturer recommends autoclaving at
temperatures of up to 273ºF with a drying stage.
Nominal parameters
♦ Sterilization temperature: 273ºF - 279ºF.
♦ Sterilization time: 8 minutes.
♦ Dry time: 20 minutes.
Operations Sequence
♦ Pre Vacuum stage; four vacuum pulses remove 99.5% of the air by
drawing the chamber down to -11 psig (22 Ih). At the end of the pre
vacuum stage s
team enters the chamber from the jacket until the
sterilization temperature and pressure is reached.
♦ Sterilization stage; temperature and pressure are maintained
constant at the preset level for the programmed sterilization time by
periodic injection of steam from the jacket.
♦ Exhaust stage; steam is rapidly exhausted from the chamber
allowing the chamber pressure to reach 0 psig (atmospheric
pressure).
♦ Post Vacuum Drying stage; while the jacket is heated to maintain a
high temperature environment within the chamber, a single vacuum
pulse is created for 20 minutes in order to release and remove
residual moisture from any items within the chamber.
TIME
PRESSURE (PSIG)
TEMPERATURE
Ambient Pressure
and Temperature
t1
t2
t3
-11 psig (22 Ih)
t1 = Pre Vacuum stage
t2 = Sterilization stage
t3 = Fast exhaust stage
t4 = Post Vacuum Drying stage
= Pressure
= Temperature
8.5 psig
To Next Page
Loading...
