Microbiological evaluation of the steam sterilization of assembled laparoscopic instruments
ABSTRACT Objective: assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. Method: a laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial popu...
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Published in | Revista latino-americana de enfermagem Vol. 24; p. e2830 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
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Brazil
Escola de Enfermagem de Ribeirão Preto / Universidade de São Paulo
01.01.2016
Universidade de São Paulo |
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ISSN | 0104-1169 1518-8345 0104-1169 1518-8345 |
DOI | 10.1590/1518-8345.1431.2830 |
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Abstract | ABSTRACT Objective: assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. Method: a laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial population of 106UFC/Filter paper substrate, removed from the biological indicator. Three of them were introduced into each instrument at the time of assembly, and sterilized at pressurized saturated steam, 134oC for 5 minutes. After sterilization, the instrument was disassembled and each filter paper substrate was inoculated in soybean casein culture and incubated at 56oC for 21 days. In case of absence of growth, they were subjected to heat shock of 80oC, for 20 minutes and re-incubated for 72 hours. Sample size: 185 graspers and 185 trocars, with 95% power. We paired the experiments with comparative negative control groups (5 graspers and 5 trocars with challenge contamination, sterilized disassembled) and positive control (30 filter paper supports, unsterilized), subject to the same incubation procedures. Results: there was no microbial growth in experimental and negative control. The results of the positive control were satisfactory. Conclusion: this study provided strong scientific evidence to support the safety of steam sterilizing of the assembled laparoscopic instrument.
RESUMEN Objetivo: evaluar la seguridad de la esterilización a través de vapor, de instrumental laparoscópico previamente montado con desafío de contaminación. Método: estudio experimental en laboratorio, cuyo cuerpo de prueba fueron trócarte y pinza laparoscópica. Se utilizó esporas Geobacillus stearothermophilus ATCC-7953, con población microbiana de 106UFC/soporte de papel filtro, removidos del indicador biológico. Tres de ellos fueron introducidos en el interior de cada instrumento, en el momento del montaje, los que fueron esterilizados a vapor saturado bajo presión, 134oC por 5 minutos. Después de la esterilización, el instrumental fue desmontado y cada soporte de papel filtro fue inoculado en medio de una cultura de caseína y soya, incubado a 56oC por 21 días. No habiendo crecimiento, fueron sometidos a un choque térmico de 80oC, por 20 minutos y nuevamente incubados por 72 horas. La muestra estuvo constituida por 185 pinzas y 185 trócartes, con poder de 95%. Los experimentos fueron acompañados en los grupos: control negativo comparativo (5 pinzas y 5 trócartes con contaminación desafío, esterilizados desmontados) y positivo (30 soportes de papel filtro, no esterilizados), sometidos a los mismos procedimientos de incubación. Resultados: no se encontró crecimiento microbiano en los grupos experimental y control negativo. Los resultados del control positivo fueron satisfactorios. Conclusión: este estudio suministra fuertes evidencias científicas para sustentar que la práctica, de esterilización a vapor del instrumental laparoscópico montado, es segura.
RESUMO Objetivo: avaliar a segurança da esterilização a vapor, do instrumental laparoscópico montado com desafio da contaminação. Método: estudo experimental laboratorial, cujo corpo de prova foram trocarte e pinça laparoscópica. Utilizou-se esporos Geobacillus stearothermophillus ATCC-7953, com população microbiana de 106UFC/suporte de papel filtro, removidos do indicador biológico. Três deles foram introduzidos no interior de cada instrumento, no momento da montagem, sendo esterilizados a vapor saturado sob pressão, 134oC por 5 minutos. Depois da esterilização, o instrumental foi desmontado, e cada suporte de papel filtro foi inoculado em meio de cultura de caseína soja, incubado a 56oC por 21 dias. Não havendo crescimento, foram submetidos a um choque térmico de 80oC, por 20 minutos e reincubados por 72 horas. Tamanho da amostra, 185 pinças e 185 trocartes, com poder de 95%. Os experimentos foram acompanhados dos grupos controle negativo comparativo (5 pinças e 5 trocartes com contaminação desafio, esterilizados desmontados) e positivo (30 suportes de papel filtro, não esterilizados), submetidos aos mesmos procedimentos de incubação. Resultados: não houve nenhum crescimento microbiano nos grupos experimental e controle negativo. Os resultados do controle positivo foram satisfatórios. Conclusão: este estudo forneceu fortes evidências científicas para sustentar a segurança da prática de esterilização a vapor do instrumental laparoscópico montado. |
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AbstractList | ABSTRACT Objective: assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. Method: a laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial population of 106UFC/Filter paper substrate, removed from the biological indicator. Three of them were introduced into each instrument at the time of assembly, and sterilized at pressurized saturated steam, 134oC for 5 minutes. After sterilization, the instrument was disassembled and each filter paper substrate was inoculated in soybean casein culture and incubated at 56oC for 21 days. In case of absence of growth, they were subjected to heat shock of 80oC, for 20 minutes and re-incubated for 72 hours. Sample size: 185 graspers and 185 trocars, with 95% power. We paired the experiments with comparative negative control groups (5 graspers and 5 trocars with challenge contamination, sterilized disassembled) and positive control (30 filter paper supports, unsterilized), subject to the same incubation procedures. Results: there was no microbial growth in experimental and negative control. The results of the positive control were satisfactory. Conclusion: this study provided strong scientific evidence to support the safety of steam sterilizing of the assembled laparoscopic instrument.
RESUMEN Objetivo: evaluar la seguridad de la esterilización a través de vapor, de instrumental laparoscópico previamente montado con desafío de contaminación. Método: estudio experimental en laboratorio, cuyo cuerpo de prueba fueron trócarte y pinza laparoscópica. Se utilizó esporas Geobacillus stearothermophilus ATCC-7953, con población microbiana de 106UFC/soporte de papel filtro, removidos del indicador biológico. Tres de ellos fueron introducidos en el interior de cada instrumento, en el momento del montaje, los que fueron esterilizados a vapor saturado bajo presión, 134oC por 5 minutos. Después de la esterilización, el instrumental fue desmontado y cada soporte de papel filtro fue inoculado en medio de una cultura de caseína y soya, incubado a 56oC por 21 días. No habiendo crecimiento, fueron sometidos a un choque térmico de 80oC, por 20 minutos y nuevamente incubados por 72 horas. La muestra estuvo constituida por 185 pinzas y 185 trócartes, con poder de 95%. Los experimentos fueron acompañados en los grupos: control negativo comparativo (5 pinzas y 5 trócartes con contaminación desafío, esterilizados desmontados) y positivo (30 soportes de papel filtro, no esterilizados), sometidos a los mismos procedimientos de incubación. Resultados: no se encontró crecimiento microbiano en los grupos experimental y control negativo. Los resultados del control positivo fueron satisfactorios. Conclusión: este estudio suministra fuertes evidencias científicas para sustentar que la práctica, de esterilización a vapor del instrumental laparoscópico montado, es segura.
RESUMO Objetivo: avaliar a segurança da esterilização a vapor, do instrumental laparoscópico montado com desafio da contaminação. Método: estudo experimental laboratorial, cujo corpo de prova foram trocarte e pinça laparoscópica. Utilizou-se esporos Geobacillus stearothermophillus ATCC-7953, com população microbiana de 106UFC/suporte de papel filtro, removidos do indicador biológico. Três deles foram introduzidos no interior de cada instrumento, no momento da montagem, sendo esterilizados a vapor saturado sob pressão, 134oC por 5 minutos. Depois da esterilização, o instrumental foi desmontado, e cada suporte de papel filtro foi inoculado em meio de cultura de caseína soja, incubado a 56oC por 21 dias. Não havendo crescimento, foram submetidos a um choque térmico de 80oC, por 20 minutos e reincubados por 72 horas. Tamanho da amostra, 185 pinças e 185 trocartes, com poder de 95%. Os experimentos foram acompanhados dos grupos controle negativo comparativo (5 pinças e 5 trocartes com contaminação desafio, esterilizados desmontados) e positivo (30 suportes de papel filtro, não esterilizados), submetidos aos mesmos procedimentos de incubação. Resultados: não houve nenhum crescimento microbiano nos grupos experimental e controle negativo. Os resultados do controle positivo foram satisfatórios. Conclusão: este estudo forneceu fortes evidências científicas para sustentar a segurança da prática de esterilização a vapor do instrumental laparoscópico montado. ABSTRACT Objective: assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. Method: a laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial population of 106UFC/Filter paper substrate, removed from the biological indicator. Three of them were introduced into each instrument at the time of assembly, and sterilized at pressurized saturated steam, 134oC for 5 minutes. After sterilization, the instrument was disassembled and each filter paper substrate was inoculated in soybean casein culture and incubated at 56oC for 21 days. In case of absence of growth, they were subjected to heat shock of 80oC, for 20 minutes and re-incubated for 72 hours. Sample size: 185 graspers and 185 trocars, with 95% power. We paired the experiments with comparative negative control groups (5 graspers and 5 trocars with challenge contamination, sterilized disassembled) and positive control (30 filter paper supports, unsterilized), subject to the same incubation procedures. Results: there was no microbial growth in experimental and negative control. The results of the positive control were satisfactory. Conclusion: this study provided strong scientific evidence to support the safety of steam sterilizing of the assembled laparoscopic instrument. assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. a laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial population of 106UFC/Filter paper substrate, removed from the biological indicator. Three of them were introduced into each instrument at the time of assembly, and sterilized at pressurized saturated steam, 134oC for 5 minutes. After sterilization, the instrument was disassembled and each filter paper substrate was inoculated in soybean casein culture and incubated at 56oC for 21 days. In case of absence of growth, they were subjected to heat shock of 80oC, for 20 minutes and re-incubated for 72 hours. Sample size: 185 graspers and 185 trocars, with 95% power. We paired the experiments with comparative negative control groups (5 graspers and 5 trocars with challenge contamination, sterilized disassembled) and positive control (30 filter paper supports, unsterilized), subject to the same incubation procedures. there was no microbial growth in experimental and negative control. The results of the positive control were satisfactory. this study provided strong scientific evidence to support the safety of steam sterilizing of the assembled laparoscopic instrument. assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination.Objectiveassess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination.a laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial population of 106UFC/Filter paper substrate, removed from the biological indicator. Three of them were introduced into each instrument at the time of assembly, and sterilized at pressurized saturated steam, 134oC for 5 minutes. After sterilization, the instrument was disassembled and each filter paper substrate was inoculated in soybean casein culture and incubated at 56oC for 21 days. In case of absence of growth, they were subjected to heat shock of 80oC, for 20 minutes and re-incubated for 72 hours. Sample size: 185 graspers and 185 trocars, with 95% power. We paired the experiments with comparative negative control groups (5 graspers and 5 trocars with challenge contamination, sterilized disassembled) and positive control (30 filter paper supports, unsterilized), subject to the same incubation procedures.Methoda laboratory experimental study, using as test samples trocars and laparoscopic graspers. Geobacillus stearothermophillus ATCC-7953 was used, with a microbial population of 106UFC/Filter paper substrate, removed from the biological indicator. Three of them were introduced into each instrument at the time of assembly, and sterilized at pressurized saturated steam, 134oC for 5 minutes. After sterilization, the instrument was disassembled and each filter paper substrate was inoculated in soybean casein culture and incubated at 56oC for 21 days. In case of absence of growth, they were subjected to heat shock of 80oC, for 20 minutes and re-incubated for 72 hours. Sample size: 185 graspers and 185 trocars, with 95% power. We paired the experiments with comparative negative control groups (5 graspers and 5 trocars with challenge contamination, sterilized disassembled) and positive control (30 filter paper supports, unsterilized), subject to the same incubation procedures.there was no microbial growth in experimental and negative control. The results of the positive control were satisfactory.Resultsthere was no microbial growth in experimental and negative control. The results of the positive control were satisfactory.this study provided strong scientific evidence to support the safety of steam sterilizing of the assembled laparoscopic instrument.Conclusionthis study provided strong scientific evidence to support the safety of steam sterilizing of the assembled laparoscopic instrument. |
Author | Suzuki, Karina Pinto, Flávia Morais Gomes Camargo, Tamara Carolina de Almeida, Alda Graciele Claudio dos Santos Graziano, Kazuko Uchikawa Silva, Cely Barreto da |
AuthorAffiliation | 7 PhD, Professor Instructor, Faculdade de Ciências Médicas, Santa Casa de Misericórdia, São Paulo, SP, Brazil 3 PhD, Full Professor, Escola de Enfermagem, Universidade de São Paulo, São Paulo, SP, Brazil 5 PhD, Adjunct Professor, Faculdade de Enfermagem, Universidade Federal de Goiás, Goiânia, GO, Brazil 6 MSc, Pharmacy-Biochemistry, Santa Casa de Misericódia, São Paulo, SP, Brazil 4 MSc, Doctoral student, Escola de Enfermagem, Universidade de São Paulo, São Paulo, SP, Brazil 2 PhD, Assistant Professor, Faculdade de Ciências Médicas e da Saúde, Pontifícia Universidade Católica de São Paulo, Sorocaba, SP, Brazil |
AuthorAffiliation_xml | – name: 2 PhD, Assistant Professor, Faculdade de Ciências Médicas e da Saúde, Pontifícia Universidade Católica de São Paulo, Sorocaba, SP, Brazil – name: 7 PhD, Professor Instructor, Faculdade de Ciências Médicas, Santa Casa de Misericórdia, São Paulo, SP, Brazil – name: 4 MSc, Doctoral student, Escola de Enfermagem, Universidade de São Paulo, São Paulo, SP, Brazil – name: 5 PhD, Adjunct Professor, Faculdade de Enfermagem, Universidade Federal de Goiás, Goiânia, GO, Brazil – name: 3 PhD, Full Professor, Escola de Enfermagem, Universidade de São Paulo, São Paulo, SP, Brazil – name: 6 MSc, Pharmacy-Biochemistry, Santa Casa de Misericódia, São Paulo, SP, Brazil – name: Universidade de São Paulo – name: Santa Casa de Misericórdia – name: Universidade Federal de Goiás – name: Pontifícia Universidade Católica de São Paulo – name: Santa Casa de Misericódia |
Author_xml | – sequence: 1 givenname: Tamara Carolina de surname: Camargo fullname: Camargo, Tamara Carolina de organization: Pontifícia Universidade Católica de São Paulo, Brazil – sequence: 2 givenname: Kazuko Uchikawa surname: Graziano fullname: Graziano, Kazuko Uchikawa organization: Universidade de São Paulo, Brazil – sequence: 3 givenname: Alda Graciele Claudio dos Santos surname: Almeida fullname: Almeida, Alda Graciele Claudio dos Santos organization: Universidade de São Paulo, Brazil – sequence: 4 givenname: Karina surname: Suzuki fullname: Suzuki, Karina organization: Universidade Federal de Goiás, Brazil – sequence: 5 givenname: Cely Barreto da surname: Silva fullname: Silva, Cely Barreto da organization: Santa Casa de Misericódia, Brazil – sequence: 6 givenname: Flávia Morais Gomes surname: Pinto fullname: Pinto, Flávia Morais Gomes organization: Santa Casa de Misericórdia, Brazil |
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Cites_doi | 10.1021/jp901801k 10.1111/j.1365-2672.2007.03330.x 10.1046/j.1365-2672.1998.00607.x 10.5327/Z1414-4425201400040004 10.1590/S0103-21002008000300018 10.1016/S0001-2092(07)61520-8 10.1590/S0104-11692011000200020 |
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Keywords | Instrumentos Cirúrgicos Instrumentos Quirúrgicos Evidence-Based Nursing Enfermagem Surgical Instruments Laparoscopy Enfermagem Baseada em Evidências Operating Room Nursing Enfermería Basada en la Evidencia Enfermagem de Centro Cirúrgico Nursing Sterilization Enfermería de Quirófano Laparoscopía Esterilização Enfermería Laparoscopia Esterilización |
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References | Camargo TC (ref11) 2008; 21 Arghyros M (ref15) 2012 Albert H (ref12) 1998; 85 (ref6) 2016 Moore G Griffith (ref16) 2007; 103 Zimbro MJ (ref14) 2009 Camargo TC (ref7) 2014; 19 Voyles CR (ref9) 1995; 5 Lopes CLBC (ref10) 2011; 19 (ref13) 2008 (ref1) 2012 Marshburn PB (ref8) 1991; 36 (ref4) 2006 Francis MJ (ref3) 2009; 113 (ref5) 1980; 32 Rutala WA (ref2) 2008 2007; 103 1991; 36 Zimbro, MJ; Power, DA; Miller, SM; Wilson, GE; Johnson, JA 2009 2012 1980; 32 2008 2009; 113 2006 2016 2008; 21 2014; 19 Rutala, WA; Weber, JD 2008 1998; 85 Arghyros, M; Douglass, G; Löcher, M; Mugg, P; Myatt, DC; Olma, T; Scholtes, A; Wilkinson, I 2012 2011; 19 1995; 5 |
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Snippet | ABSTRACT Objective: assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. Method: a laboratory... assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination. a laboratory experimental study, using as test... assess the safety of steam sterilization of assembled laparoscopic instruments with challenge contamination.Objectiveassess the safety of steam sterilization... |
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SubjectTerms | Enfermería Enfermería Basada en la Evidencia Enfermería de Quirófano Equipment Contamination Esterilización Instrumentos Quirúrgicos Laparoscopes - microbiology Laparoscopía NURSING Original Steam Sterilization - methods |
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Title | Microbiological evaluation of the steam sterilization of assembled laparoscopic instruments |
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