Embedded sacrificial AlAs segments in GaAs nanowires for substrate reuse.

We report on the use of a sacrificial AlAs segment to enable substrate reuse for nanowire synthesis. A silicon nitride template was deposited on a p-type GaAs substrate. Then a pattern was transferred to the substrate by nanoimprint lithography and reactive ion etching. Thermal evaporation was used to define Au seed particles. Metalorganic vapour phase epitaxy was used to grow AlAs-GaAs NWs in the vapour-liquid-solid growth mode. The yield of synthesised nanowires, compared to the number expected from the patterned template, was more than 80%. After growth, the nanowires were embedded in a polymer and mechanically removed from the parent substrate. The parent substrate was then immersed in an HCl:H2O (1:1) mixture to dissolve the remaining stub of the sacrificial AlAs segment. The pattern fidelity was preserved after peeling off the nanowires and cleaning, and the semiconductor surface was flat and ready for reuse. Au seed particles were then deposited on the substrate by use of pulse electrodeposition, which was selective to the openings in the growth template, and then nanowires were regrown. The yield of regrowth was less optimal compared to the first growth but the pattern was preserved. Our results show a promising approach to reduce the final cost of III-V nanowire based solar cells.

Carga de trabajo y cumplimiento por parte de las enfermeras de las medidas no farmacológicas para la prevención de la neumonía asociada a la ventilación mecánica. Estudio piloto / Nursing workload and adherence to non-pharmacological measures in the prevention of ventilator-associated pneumonia. A pilot study

Objetivo: Analizar si el cumplimiento de las medidas no farmacológicas para la prevención de la neumonía asociada a la ventilación mecánica (NAV) se asocia a la carga de trabajo de las enfermeras. Método: Estudio observacional prospectivo llevado a cabo en una UCI médico-quirúrgica. Se evaluó a las enfermeras a cargo de pacientes con soporte ventilatorio. Variables: cuestionario de conocimiento, aplicación de las medidas no farmacológicas de prevención de la NAV, carga de trabajo medida mediante el Nine Equivalents of Nursing Manpower Use Score. Fases: 1) las enfermeras realizaron un programa educativo, basado en conferencias de 60 min sobre medidas no farmacológicas para la prevención de NAV, completando al finalizar un cuestionario de conocimiento; 2) periodo de observaciones; 3) cuestionario de conocimiento. Resultados: De un total de 67 enfermeras de UCI, 54 completaron el programa formativo y fueron incluidos en el estudio. Se llevaron a cabo un total de 160 observaciones de 49 enfermeros/as. El correcto conocimiento de las medidas de prevención se confirmó tanto en el cuestionario inicial como final. La aplicación de las medidas de prevención varió desde el 11% para el lavado de manos preaspiración hasta el 97% para el uso de sonda de aspiración estéril. La puntuación del Nine Equivalents of Nursing Manpower Use Score fue de 50±13. No se observaron asociaciones significativas entre el grado de conocimiento y la aplicación de medidas de prevención, ni entre la carga de trabajo y la aplicación de dichas medidas. Conclusiones: El conocimiento de las enfermeras de las medidas de prevención de la NAV no se traslada necesariamente a la práctica diaria. En la población estudiada, la falta de aplicación de estas medidas no está sujeta a la falta de conocimiento ni a la carga de trabajo, sino probablemente a los factores contextuales (AU)

Objective: To analyse whether adherence to non-pharmacological measures in the prevention of ventilator-associated pneumonia (VAP) is associated with nursing workload. Methods: A prospective observational study performed in a single medical-surgical ICU. Nurses in charge of patients under ventilator support were assessed. Variables: knowledge questionnaire, application of non-pharmacological VAP prevention measures, and workload (Nine Equivalents of Nursing Manpower Use Score). Phases: 1) the nurses carried out a educational programme, consisting of 60-minute lectures on non-pharmacological measures for VAP prevention, and at the end completed a questionnaire knowledge; 2) observation period; 3) knowledge questionnaire. Results: Among 67 ICU-staff nurses, 54 completed the educational programme and were observed. A total of 160 observations of 49 nurses were made. Adequate knowledge was confirmed in both the initial and final questionnaires. Application of preventive measures ranged from 11% for hand washing pre-aspiration to 97% for the use of a sterile aspiration probe. The Nine Equivalents of Nursing Manpower Use Score was 50±13. No significant differences were observed between the association of the nurses' knowledge and the application of preventive measures or between workload and the application of preventive measures. Conclusions: Nurses' knowledge of VAP prevention measures is not necessarily applied in daily practice. Failure to follow these measures is not subject to lack of knowledge or to increased workload, but presumably to contextual factors (AU)

Nursing workload and adherence to non-pharmacological measures in the prevention of ventilator-associated pneumonia. A pilot study. / Carga de trabajo y cumplimiento por parte de las enfermeras de las medidas no farmacológicas para la prevención de la neumonía asociada a la ventilación mecánica. Estudio piloto.

OBJECTIVE: To analyse whether adherence to non-pharmacological measures in the prevention of ventilator-associated pneumonia (VAP) is associated with nursing workload. METHODS: A prospective observational study performed in a single medical-surgical ICU. Nurses in charge of patients under ventilator support were assessed. VARIABLES: knowledge questionnaire, application of non-pharmacological VAP prevention measures, and workload (Nine Equivalents of Nursing Manpower Use Score). Phases: 1) the nurses carried out a educational programme, consisting of 60-minute lectures on non-pharmacological measures for VAP prevention, and at the end completed a questionnaire knowledge; 2) observation period; 3) knowledge questionnaire. RESULTS: Among 67 ICU-staff nurses, 54 completed the educational programme and were observed. A total of 160 observations of 49 nurses were made. Adequate knowledge was confirmed in both the initial and final questionnaires. Application of preventive measures ranged from 11% for hand washing pre-aspiration to 97% for the use of a sterile aspiration probe. The Nine Equivalents of Nursing Manpower Use Score was 50±13. No significant differences were observed between the association of the nurses' knowledge and the application of preventive measures or between workload and the application of preventive measures. CONCLUSIONS: Nurses' knowledge of VAP prevention measures is not necessarily applied in daily practice. Failure to follow these measures is not subject to lack of knowledge or to increased workload, but presumably to contextual factors.

Guidelines for the prevention of ventilator-associated pneumonia and their implementation. The Spanish ‘‘Zero-VAP’’ bundle

BACKGROUND: ''Zero-VAP'' is a proposal for the implementation of a simultaneous multimodal intervention in Spanish intensive care units (ICU) consisting of a bundle of ventilator-associated pneumonia (VAP) prevention measures. Methods/DESIGN: An initiative of the Spanish Societies of Intensive Care Medicine and of Intensive Care Nurses, the project is supported by the Spanish Ministry of Health, and participation is voluntary. In addition to guidelines for VAP prevention, the ''Zero-VAP'' Project incorporates an integral patient safety program and continuous online validation of the application of the bundle. For the latter, VAP episodes and participation indices are entered into the web-based Spanish ICU Infection Surveillance Program ''ENVIN-HELICS'' database, which provides continuous information about local, regional and national VAP incidence rates. Implementation of the guidelines aims at the reduction of VAP to less than 9 episodes per 1000 days of mechanical ventilation. A total of 35 preventive measures were initially selected. A task force of experts used the Grading of Recommendations, Assessment, Development and Evaluation Working Group methodology to generate a list of 7 basic "mandatory" recommendations (education and training in airway management, strict hand hygiene for airway management, cuff pressure control, oral hygiene with chlorhexidine, semi-recumbent positioning, promoting measures that safely avoid or reduce time on ventilator, and discouraging scheduled changes of ventilator circuits, humidifiers and endotracheal tubes) and 3 additional "highly recommended" measures (selective decontamination of the digestive tract, aspiration of subglottic secretions, and a short course of IV antibiotic). Discussion: We present the Spanish VAP prevention guidelines and describe the methodology used for the selection and implementation of the recommendations and the organizational structure of the project. Compared to conventional guideline documents, the associated safety assurance program, the online data recording and compliance control systems, as well as the existence of a pre-defined objective are the distinct features of "Zero VAP"

ANTECEDENTES: «Neumonía Zero» es una propuesta de aplicación de una intervención multimodal simultánea en las unidades de cuidados intensivos españolas que consiste en un paquete de medidas preventivas de la neumonía asociada a la ventilación mecánica (NAVM).Métodos/DISEÑO: Se trata de una iniciativa de las sociedades españolas de Medicina Intensiva y Enfermería Intensiva. El proyecto cuenta con el apoyo del Ministerio de Sanidad y la participación es voluntaria. Además de las directrices para la prevención de la NAVM, el proyecto« Neumonía Zero» incluye un programa integral de seguridad del paciente y una validación continua« online» de la aplicación de las medidas. Para ello se introducen los episodios de NAVM y los índices de participación en la base de datos en red del programa« ENVIN-HELICS» de vigilancia de las infecciones en las unidades de cuidados intensivos españolas, que ofrece información continua acerca de las tasas de incidencia de NAVM a nivel local, autonómico y nacional. La aplicación de «Neumonía Zero»preten de reducir las NAVM a menos de 9 episodios por cada 1.000 días de ventilación mecánica. Inicialmente, se seleccionaron 35 medidas de prevención. Un grupo de expertos utilizó la metodología del Grading of Recommendations, Assessment, Developmentand Evaluation Working Group para crear una lista de 7 recomendaciones básicas «obligatorias»(formación y entrenamiento en el manejo de la vía aérea, higiene estricta de manos en el manejo de la vía aérea, control de la presión del neumotaponamiento, higiene bucal con clorhexidina, posición semiincorporada, fomento de medidas que de forma segura eviten o reduzcan la duración de la ventilación mecánica, y desaconsejar los cambios programados de tubuladuras, humidificadores y tubos endotraqueales) y 3 medidas adicionales «muy recomendables» (descontaminación selectiva del tubo digestivo, aspiración de las secreciones subglóticas y un breve curso de antibióticos intravenosos). Debate: Presentamos las directrices españolas para la prevención de la NAVM y describimos la metodología utilizada para seleccionar y aplicar las recomendaciones y la estructura organizativa del proyecto. En comparación con recomendaciones convencionales, el programa de seguridad asociado, el registro de datos «online» y los sistemas de control del cumplimiento, además de la existencia de un objetivo predefinido, son características distintivas de «Neumonía Zero»

Guidelines for the prevention of ventilator-associated pneumonia and their implementation. The Spanish "Zero-VAP" bundle

"BACKGROUND: ""Zero-VAP"" is a proposal for the implementation of a simultaneous multimodal intervention in Spanish intensive care units (ICU) consisting of a bundle of ventilator-associated pneumonia (VAP) prevention measures. METHODS/DESIGN: An initiative of the Spanish Societies of Intensive Care Medicine and of Intensive Care Nurses, the project is supported by the Spanish Ministry of Health, and participation is voluntary. In addition to guidelines for VAP prevention, the ""Zero-VAP"" Project incorporates an integral patient safety program and continuous online validation of the application of the bundle. For the latter, VAP episodes and participation indices are entered into the web-based Spanish ICU Infection Surveillance Program ""ENVIN-HELICS"" database, which provides continuous information about local, regional and national VAP incidence rates. Implementation of the guidelines aims at the reduction of VAP to less than 9 episodes per 1000 days of mechanical ventilation. A total of 35 preventive measures were initially selected. A task force of experts used the Grading of Recommendations, Assessment, Development and Evaluation Working Group methodology to generate a list of 7 basic ""mandatory"" recommendations (education and training in airway management, strict hand hygiene for airway management, cuff pressure control, oral hygiene with chlorhexidine, semi-recumbent positioning, promoting measures that safely avoid or reduce time on ventilator, and discouraging scheduled changes of ventilator circuits, humidifiers and endotracheal tubes) and 3 additional ""highly recommended"" measures (selective decontamination of the digestive tract, aspiration of subglottic secretions, and a short course of iv antibiotic). DISCUSSION: We present the Spanish VAP prevention guidelines and describe the methodology used for the selection and implementation of the recommendations and the organizational structure of the project. Compared to conventional guideline documents, the associated safety assurance program, the online data recording and compliance control systems, as well as the existence of a pre-defined objective are the distinct features of ""Zero VAP"""

Guidelines for the prevention of ventilator-associated pneumonia and their implementation. The Spanish "Zero-VAP" bundle.

BACKGROUND: "Zero-VAP" is a proposal for the implementation of a simultaneous multimodal intervention in Spanish intensive care units (ICU) consisting of a bundle of ventilator-associated pneumonia (VAP) prevention measures. METHODS/DESIGN: An initiative of the Spanish Societies of Intensive Care Medicine and of Intensive Care Nurses, the project is supported by the Spanish Ministry of Health, and participation is voluntary. In addition to guidelines for VAP prevention, the "Zero-VAP" Project incorporates an integral patient safety program and continuous online validation of the application of the bundle. For the latter, VAP episodes and participation indices are entered into the web-based Spanish ICU Infection Surveillance Program "ENVIN-HELICS" database, which provides continuous information about local, regional and national VAP incidence rates. Implementation of the guidelines aims at the reduction of VAP to less than 9 episodes per 1000 days of mechanical ventilation. A total of 35 preventive measures were initially selected. A task force of experts used the Grading of Recommendations, Assessment, Development and Evaluation Working Group methodology to generate a list of 7 basic "mandatory" recommendations (education and training in airway management, strict hand hygiene for airway management, cuff pressure control, oral hygiene with chlorhexidine, semi-recumbent positioning, promoting measures that safely avoid or reduce time on ventilator, and discouraging scheduled changes of ventilator circuits, humidifiers and endotracheal tubes) and 3 additional "highly recommended" measures (selective decontamination of the digestive tract, aspiration of subglottic secretions, and a short course of iv antibiotic). DISCUSSION: We present the Spanish VAP prevention guidelines and describe the methodology used for the selection and implementation of the recommendations and the organizational structure of the project. Compared to conventional guideline documents, the associated safety assurance program, the online data recording and compliance control systems, as well as the existence of a pre-defined objective are the distinct features of "Zero VAP".

Análisis del nivel de satisfacción profesional y de la visión de futuro de la medicina intensiva como especialidad / Analysis of levels of professional satisfaction and view of the future of critical care medicine as a speciality

Fundamento. Dos objetivos fundamentan este estudio: conocer el nivel de satisfacción profesional de los médicos adscritos a los servicios de medicina intensiva y averiguar cuál es la visión de futuro de la medicina intensiva como especialidad. Métodos. Mediante una encuesta realizada a 245 médicos intensivistas de un mismo ámbito territorial y contestada por 46, se describen y analizan las respuestas obtenidas en cuanto al nivel de satisfacción laboral, la organización del servicio de medicina intensiva, los valores de los profesionales y el posicionamiento estratégico de la especialidad. Se analizan las características consideradas más positivas y más negativas por sus profesionales. Resultados. El análisis del nivel de satisfacción profesional es en general positivo. Mayoritariamente existe un acuerdo con el modelo actual de organización del staff en los servicios de medicina intensiva. Aunque la actividad asistencial es considerada prioritaria, se valora de forma positiva la docencia e investigación. El modelo actual de la medicina intensiva no parece ser el más adecuado, y la mayoría está de acuerdo en aceptar planteamientos de cambio. Las características positivas de la medicina intensiva hacen referencia al propio enfermo crítico y a su atención global y continuada; así como al know-how de sus profesionales. Las características negativas se relacionan principalmente con el síndrome de burnout. Conclusiones. Factores internos característicos de la medicina intensiva condicionan el nivel de satisfacción profesional, pero éste se ve influido también por factores externos. Existe un deseo de adaptar la organización de la medicina intensiva al futuro de la especialidad, pero sin perder una serie de "privilegios" inherentes a la organización clásica de atención del enfermo crítico (AU)