Pressure Cooker as Autoclave AGAIN

[Dr. Michael J. Miller]

You would expect to see condensation inside the bag you described. 
Actually, thermal lethality will increase with moist steam when compared
with than heat alone.  As for the sealed ampoules previously mentioned,
there are sealed biological indicators used to monitor autoclave cycles. 
They do not implode!

Dr. Michael J. Miller
http://www.servtech.com/~mignatz/olympics.html