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Journal Information
Vol. 33. Issue 3.
Pages 133-135 (March 1997)
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Vol. 33. Issue 3.
Pages 133-135 (March 1997)
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Ácido peracético: alternativa a la esterilización de broncofibroscopios
Peracetic acid: an altemative to sterilization of fiberoptic bronchoscopes
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J.I. Villate*,1, J. Barrón**, R. Zalacaín***, M.I. Urcelay*, J.M. Hernández*, M. Argumedo*
* Servicio de Medicina Preventiva. Vizcaya. Universidad del País Vasco
** Servicio de Microbiología. Vizcaya. Universidad del País Vasco
*** Servicio de Neumología. Hospital de Cruces. Cruces. Baracaldo
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Se ha valorado el sistema de esterilización en frío con ácido peracético Steris® a través de sucesivas contaminaciones de un broncofibroscopio (BF) con muestras de Pseudomonas aeruginosa, Acinetobacter baumannii y Mycobacterium kansasii.

El BF se ha contaminado en 24 ocasiones, ocho por cada microorganismo, con muestras que contenían niveles superiores a 108ufc/ml. Tras la fijación de secreciones en el BF y lavado con jabón enzimático, se ha llevado a cabo la esterilización, tomándose muestras para cultivo después de la contaminación del BF, de la limpieza, al finalizar el proceso de esterilización y una hora después de finalizado el mismo.

No se detectó crecimiento de microorganismos en ninguna de las muestras obtenidas después de la esterilización, ni a la hora de finalizado el proceso. Los datos microbiológicos demostraron la contaminación del BF tras la aspiración y fijación del inoculo. Los tests químicos y biológicos con esporas de B. stearothermophilus, propuestos por el fabricante, fueron correctos en todos los casos: 24 contaminaciones y 52 procesos de entrenamiento previos.

Debe resaltarse la eficacia del lavado con jabón enzimático previo a la esterilización. En 14 de las 24 muestras, el cultivo poslavado fue negativo y en siete la concentración de microorganismos fue menor de 500ufc/ml, lo que ratifica la necesidad de un lavado correcto previo a cualquier proceso de desinfección o esterilización.

En conclusión, el sistema Steris®, a base de ácido peracético, es una alternativa en relación a los sistemas de esterilización en frío y desinfección de alto nivel.

Palabras clave:
Ácido peracético
Esterilización fibrobroncoscopios

The Steris® system for cold sterilization with peracetic acid was evaluated by effecting a series of contaminations of a fiberoptic bronchoscope (FB) with specimens of Pseudomonas aeruginosa, Acinetobacter baumanii and Mycobacterium kansasi.

The FB was contaminated 24 times, 8 times by each microorganism, using specimens containing more than 108cfu/ml. After fixing the secretions on the FB and washing it with enzyme soap, the BF was sterilized. Specimens were taken for culturing after contamination of the FB, after washing, immediately after sterilization and 1 hour after sterilization.

No microorganism growth of any of the samples was detected either immediately after sterilization or one hour later. Microbiological data confirmed contamination of the FB after aspiration and fixation of the inoculate. Chemical and biological tests with B. stearothermophilus spores as specified by the manufacturer were correct in all cases: 24 contaminations and 52 processes of prior training.

The efficacy of washing with enzyme soap before sterilization stands out. In 14 of the 24 samples, culture was negative after washing and in 7 the concentration of microorganisms was less than 500cfu/ml, which confirms the need for appropriate washing before any disinfection or sterilization process is begun.

In conclusion, the Steris system based on peracetic acid is an alternative to other systems for cold sterilization or high level disinfection.

Key words:
Cleaning
Sterilization of fiberoptic bronchoscopes
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Hum Toxicol, 5 (1986), pp. 325-327
Copyright © 1997. Sociedad Española de Neumología y Cirugía Torácica
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