Optimum hydrogen peroxide vapor sterilization system
First Claim
1. A system for optimizing sterilization with a sterilant vapor, comprising:
- a sterilization chamber comprising an inlet port and an outlet port, said chamber being fluidly connected to a vacuum means;
an injection assembly for injecting a sterilant vapor into a carrier gas;
means for flowing the sterilant vapor and carrier gas into the chamber through the inlet port, through the chamber, and out of the chamber through the outlet port;
a measuring unit for predetermining the relative humidity, pressure and temperature of the carrier gas;
a sensing unit for sensing a characteristic in the sterilization chamber during a sterilization cycle, said characteristic selected from the group consisting of pressure and temperature;
a first regulating unit for regulating the rate of injection of the sterilant vapor into the carrier gas to maintain a predetermined percentage of the instantaneous saturation limit for the sterilant vapor in the chamber, wherein the rate of sterilant vapor injection is responsive to the sensed characteristic in the chamber and the predetermined relative humidity, pressure and temperature of the carrier gas.
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Accused Products
Abstract
A sterilization method is provided which includes the steps of measuring the pressure within a sterilization chamber injecting a sterilant vapor into a flow of carrier gas, introducing the sterilant vapor and carrier gas into and through a sterilization chamber, and adjusting the rate of sterilant vapor injection to reach a pre-determined percentage of saturation limit for the sterilant vapor in the chamber, immediately following the introduction of sterilant vapor and carrier gas into the chamber, in response to the measured pressure. The predetermined saturation limit is selected to optimize the rate of sterilization, while avoiding substantial condensation of the sterilant.
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Citations
4 Claims
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1. A system for optimizing sterilization with a sterilant vapor, comprising:
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a sterilization chamber comprising an inlet port and an outlet port, said chamber being fluidly connected to a vacuum means; an injection assembly for injecting a sterilant vapor into a carrier gas; means for flowing the sterilant vapor and carrier gas into the chamber through the inlet port, through the chamber, and out of the chamber through the outlet port; a measuring unit for predetermining the relative humidity, pressure and temperature of the carrier gas; a sensing unit for sensing a characteristic in the sterilization chamber during a sterilization cycle, said characteristic selected from the group consisting of pressure and temperature; a first regulating unit for regulating the rate of injection of the sterilant vapor into the carrier gas to maintain a predetermined percentage of the instantaneous saturation limit for the sterilant vapor in the chamber, wherein the rate of sterilant vapor injection is responsive to the sensed characteristic in the chamber and the predetermined relative humidity, pressure and temperature of the carrier gas. - View Dependent Claims (2, 3, 4)
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Specification