Steam sterilization indicator

Details Steam sterilization indicator Steam sterilization indicator

G - Physics

01

K

116/67

G01K 1/02 (2006.01)

Patent

CA 1165188

IMPROVED STEAM STERILIZATION INDICATOR ABSTRACT A steam sterilization indicator comprising a tablet including a fusible material and an amount of binder, with a steam permeable membrane covering at least a part of the indicator. The fusible material is meltable at and above a predetermined temperature in the presence of substantially saturated steam. The melting point of the fusible material is substantially lower in the presence of saturated steam than when dry. A wicking strip having one end in close proximity to the tablet is provided whereby upon the attainment of the predetermined temperature, or above, the fusible material melts and moves along the strip at a rate proportional to the temperature of the saturated steam. The binder holds the fusible material in tablet form prior to the attainment of the predetermined temperature or above and further provides a mechanism for altering the rate movement of the fusible material along the strip as a function of the amount of binder used for certain temperature ranges, such rate of movement being similar to spore death kinetics. - 1 -

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