Sterilization indicator with temperature indicator
AssigneeAmerican Sterilizer Company
InventorHarry Bala
Life of this patent
Estimating the term…
Abstract
A steam sterilization indicator for indicating acceptability of a sterilization cycle includes a temperature indicator for indicating the temperature used in the sterilization cycle.
Claims18
A sterilization indicator configured for indicating acceptability of a sterilization cycle for at least two different sterilization conditions including a first sterilization condition for a first period of time at a first temperature and a second sterilization condition for a second period of time at a second temperature that is different from the first temperature, the sterilization indicator comprising:
- a base element;
- an indicator chemical composition arranged on the base element, the indicator chemical composition formed from a temperature sensitive material configured to display a base color at a room temperature and change to a first color after being exposed to the first temperature and to a second color after being exposed to the second temperature, wherein the first color is visually distinguishable from the base color, and the second color is visually distinguishable from the base color and the first color;
- a wicking material positioned at least in part in contact with the indicator chemical composition;
- a film layer positioned over the base element, the wicking material and the indicator chemical composition;
- a first pass zone;
- a second pass zone;
- and
- a temperature indicator configured to indicate a temperature used in the sterilization cycle;
- wherein, the sterilization indicator is configured to indicate that an acceptable level of sterilization has occurred when the indicator chemical composition wicks along the wicking material to a location within the first pass zone after a sterilization cycle using the first sterilization condition, or when the indicator chemical composition wicks along the wicking material to a location within the second pass zone after a sterilization cycle using the second sterilization condition, the temperature indicator displaying a temperature indicator base color at a room temperature and changing to a temperature indicator first color after being exposed to the first temperature and to a temperature indicator second color after being exposed to the second temperature, wherein the temperature indicator first color is visually distinguishable from the temperature indicator base color, and the temperature indicator second color is visually distinguishable from the temperature indicator base color and the temperature indicator first color.
A steam sterilization indicator configured as a Class 5/Type 5 steam sterilization indicator comprising:
- a base element;
- an indicator chemical composition arranged on the base element, the indicator chemical composition formed from a temperature sensitive material configured to display a base color at a room temperature and change to a first color after being exposed to the first temperature and to a second color after being exposed to the second temperature, wherein the first color is visually distinguishable from the base color, and the second color is visually distinguishable from the base color and the first color;
- a wicking material positioned at least in part in contact with the indicator chemical composition;
- a film layer positioned over the base element, the wicking material and the indicator chemical composition;
- a pass zone and a fail zone;
- and
- a temperature indicator formed from an irreversible thermochromic ink configured to indicate a temperature of a sterilization cycle,
- the thermochromic ink displaying a base color at a room temperature and changing to a first color after being exposed to the first temperature and to a second color after being exposed to the second temperature, wherein the first color is visually distinguishable from the base color, and the second color is visually distinguishable from the base color and the first color.
Dependencies are inferred from the claim text.