US Patent No: 5,872,359
Number of patents in Portfolio can not be more than 2000
Real-time monitor and control system and method for hydrogen peroxide vapor decontamination
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Feb 16, 1999
Issued date -
Jul 27, 1995
filing date -
08/508,314
serial no -
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Abstract
The invention includes a system and a method for maintaining a selected concentration of a sterilant vapor during vapor phase sterilization. The system includes a sterilization chamber with a source of multicomponent vapor containing a sterilant vapor, an electromagnetic radiation source capable of generating radiation at a plurality of wavelengths, a radiation detector for detecting and quantitating the electromagnetic radiation absorbed at the wavelengths, the detector generating absorbance signals proportional to the concentration of the sterilant vapor in the multicomponent vapor, a microprocessor programmed to compare the absorbance signals with reference absorbance signals, to calculate the sterilant vapor concentration therefrom and to generate an output signal, and a controller to receive the output signal and to control addition of the sterilant vapor to the sterilization chamber to maintain a selected concentration of the sterilant vapor in the sterilization chamber during the sterilization process. The method allows sterilization conditions to be optimized to reduce the time required for and to increase the sterilization efficacy of the sterilization procedure.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,843,867 System for monitoring sterilant vapor concentration | 40 | 1987 | |
| 4,956,145 Optimum hydrogen peroxide vapor sterilization method | 81 | 1987 | |
| RE33007 Method of vaporizing multicomponent liquids | 20 | 1988 | |
| 4,909,999 Flow-through vapor phase sterilization system | 68 | 1989 | |
| 5,173,258 Recirculation, vapor and humidity control in a sealable enclosure | 49 | 1989 | |
| 5,139,957 Chemical indicator that includes potassium dichromate and urea and method of using the same to detect hydrogen peroxide | 25 | 1990 | |
| 5,600,142 Measurement of vaporized hydrogen peroxide | 47 | 1995 | |
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| 4,664,522 Optical waveguide spectrum analyzer and method | 23 | 1984 | |
| 4,786,171 Spectral analysis apparatus and method | 38 | 1986 | |
| 5,184,193 Dual fiber optic spectrophotometer | 8 | 1989 | |
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| 5,475,222 Ruggedized gas detector | 9 | 1994 | |
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| 5,418,366 IR-based nitric oxide sensor having water vapor compensation | 51 | 1994 | |
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| 5,139,956 Method and system for determining peroxide content | 10 | 1991 | |
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| 5,055,690 Method of eliminating water vapor interference in detecting gases | 8 | 1989 | |
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| 5,384,640 Gas sample chamber for use with a source of coherent radiation | 15 | 1993 | |
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| 4,641,973 Method and apparatus for measurement of the concentration of a component of a mixture | 21 | 1982 | |
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| 4,661,320 Gas sensor | 38 | 1984 | |
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| 4,680,271 Process and apparatus for analysis | 11 | 1985 | |
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| 4,916,058 Method and test composition for determination of hydrogen peroxide | 5 | 1987 | |
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| 4,998,018 Two-wavelength type respiratory gas concentration measuring apparatus | 31 | 1990 | |
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| 4,323,777 Hydrocarbon gas analyzer | 30 | 1980 | |
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| 5,167,927 Monitor for ozone, hydrogen peroxide and other gases in fluids | 19 | 1989 | |
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| 5,445,792 Optimum hydrogen peroxide vapor sterlization method | 76 | 1994 | |
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| 5,339,155 Optical wavelength modulated long-path gas monitoring apparatus | 14 | 1993 | |
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| 5,081,045 Chemical concentration pressure analyzing apparatus and process | 12 | 1990 | |