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1.
Rev Gaucha Enferm ; 44: e20230071, 2023.
Article in English, Portuguese | MEDLINE | ID: mdl-38055459

ABSTRACT

OBJECTIVE: To investigate the impact of the COVID-19 pandemic on personal dimensions and its relationship with the work context of nursing technicians who worked in ICUs. METHOD: A cross-sectional mixed-method study (convergent parallel). A total of 229 nursing technicians from intensive care units participated and responded a questionnaire. The study was conducted using the IRaMuTeQ software for lexicographic verification and similarity analysis of the corpus and the Minitab 19 software for comparison between means and logistic regression. RESULTS: Fear was found that the biggest impact on the lives of nursing technicians. The professionals experienced stress and anxiety as a consequence of the fear of Coronavirus infection and its transmission to their families. CONCLUSION: The pandemic affected the daily personal lives of nursing technicians, in the same work context, in different ways.


Subject(s)
COVID-19 , Humans , COVID-19/epidemiology , Pandemics , Cross-Sectional Studies , Anxiety/epidemiology , Intensive Care Units
2.
Rev. gaúch. enferm ; 44: e20230071, 2023. tab, graf
Article in English | LILACS-Express | LILACS, BDENF - Nursing | ID: biblio-1522036

ABSTRACT

ABSTRACT Objective: To investigate the impact of the COVID-19 pandemic on personal dimensions and its relationship with the work context of nursing technicians who worked in ICUs. Method: A cross-sectional mixed-method study (convergent parallel). A total of 229 nursing technicians from intensive care units participated and responded a questionnaire. The study was conducted using the IRaMuTeQ software for lexicographic verification and similarity analysis of the corpus and the Minitab 19 software for comparison between means and logistic regression. Results: Fear was found that the biggest impact on the lives of nursing technicians. The professionals experienced stress and anxiety as a consequence of the fear of Coronavirus infection and its transmission to their families. Conclusion: The pandemic affected the daily personal lives of nursing technicians, in the same work context, in different ways.


RESUMEN Objetivo: Investigar el impacto de la pandemia de la COVID-19 en las dimensiones personales y su relación con el contexto de trabajo de los técnicos de enfermería que actuaban en las UTI. Método: Estudio transversal de carácter mixto (paralelo convergente). Participaron 229 técnicos de enfermería de unidades de cuidados intensivos que respondieron un cuestionario. El estudio mixto se realizó con la ayuda del software IRaMuTeQ para verificación lexicográfica y análisis de similitud del corpus y el software Minitab 19 para comparación entre medias y regresión logística. Resultados: Se constató que la mayor repercusión en la vida de los técnicos de enfermería fue el miedo. Los profesionales tenían estrés y ansiedad como consecuencia del miedo a la contaminación por el Coronavirus y la diseminación a los familiares. Conclusión: La pandemia afectó el cotidiano personal de los técnicos de enfermería, en el mismo contexto de trabajo, de formas diversas.


RESUMO Objetivo: Investigar a repercussão da pandemia da COVID-19 nas dimensões pessoais e sua relação com o contexto laboral dos técnicos de enfermagem que atuaram em unidades de terapia intensiva. Método: Pesquisa transversal de natureza mista (paralelo convergente). Participaram 229 técnicos de enfermagem de unidades de terapia intensiva que responderam um questionário. O estudo foi realizado com auxílio do software IRaMuTeQ para verificação lexicográfica e análise de similitude do corpus e o software Minitab 19 para comparação entre médias e regressão logística. Resultados: Verificou-se que a maior repercussão na vida dos técnicos de enfermagem foi o medo. Os profissionais apresentaram estresse e ansiedade que se configuraram como desdobramento do medo de contaminação pelo Coronavírus e disseminação para familiares. Conclusão: A pandemia afetou de formas distintas o cotidiano de vida pessoal dos técnicos de enfermagem, inseridos no mesmo contexto laboral.

3.
Preprint in Portuguese | SciELO Preprints | ID: pps-2444

ABSTRACT

Bullying is a systematic aggressive act, involving threat, intimidation or coercion, practiced against someone, by an individual or a group of people. It is a problem still present in young people, especially in the school environment. The objective of this work was to analyze the reasons of bullying victimization  and measures to minimize them, in different educational contexts, perceived by students. A questionnaire was used, adapted from the "Peer Victimization Scale" model by Mynard and Joseph (2000), with two questions about the occurrence of victimization by bulliyng and measures to minimize it. Student responses were categorized for each question. The responses in category 1 were classified as: my fault, the fault of the other and naturalization. Category 2 responses were classified as: Individualized assistance, awareness, punishment, supervision and nothing to do. The categorized results were related to quantitative victimization data and considerations were made for anti-bullying actions in schools based on the results.


El Bullying es un acto agresivo sistemático que implica una amenaza, intimidación o coacción que puede ser llevado a cabo por una o más personas en contra de alguien. Es un problema que está presente en la vida de los jóvenes, principalmente en el ámbito escolar.  El objetivo de este trabajo es analizar las diferencias percibidas por los estudiantes de los motivos de la victimización por bullying y las medidas para minimizarlas en diferentes contextos educativos. Utilizamos un cuestionario adaptado del modelo Peer Victimization Scale, de Mynard y Joseph (2000), con dos preguntas sobre la aparición de victimizaciones por bulling y medidas para minimizarlas. Las respuestas de los estudiantes fueron categorizadas y relacionadas a cada pregunta. Las respuestas de la categoría 1 fueron clasificadas en: mi culpa, culpa del otro y naturalización. Las respuestas de la categoría 2 fueron clasificadas en: auxilio individual, sensibilización, punición, supervisión, nada que hacer. Los resultados categorizados fueron relacionados a los datos cuantitativos de la victimización; en base a los resultados fueron hechas consideraciones para acciones anti bullying en las escuelas.


O bullying é um ato agressivo sistemático, envolvendo ameaça, intimidação ou coação, praticado contra alguém, por um indivíduo ou um grupo de pessoas. É um problema ainda presente na vida dos jovens, principalmente no ambiente escolar. O objetivo desse trabalho foi analisar as diferenças percebidas pelos estudantes quanto aos motivos das vitimizações por bullying e medidas para minimizá-las, em diferentes contextos educacionais Utilizou-se de um questionário adaptado do modelo "Peer Victimization Scale" de Mynard e Joseph (2000) com duas perguntas sobre a ocorrência de vitimizações por bulliyng e medidas para minimizá-lo. As respostas dos estudantes foram categorizadas relativas a cada pergunta. As respostas da categoria 1 foram classificadas em: minha culpa, culpa do outro e naturalização. As respostas da categoria 2 foram classificadas em: Auxílio individualizado, sensibilização, punição, supervisão e nada a fazer. Os resultados categorizados foram relacionados aos dados quantitativos de vitimização e baseado nos resultados  foram feitas considerações para ações anti-bullying nas escolas.

4.
Rev. enferm. UFPE on line ; 14: [1-9], 2020. ilus, tab
Article in Portuguese | BDENF - Nursing | ID: biblio-1096339

ABSTRACT

Objetivo: categorizar a vitimização por bullying e cyberbullying em adolescentes. Método: trata-se de um estudo quantitativo, descritivo, exploratório, transversal, com estudantes adolescentes de duas escolas públicas e duas particulares que respondeream um questionário, em seguida, empregou-se o instrumento Multidimentional Peer Victimation Scale adaptado para a mensuração do bullying. Utilizou-se o teste Kruskal-Wallis para a comparação entre médias e a correlação de Pearson para relacionar as variáveis estudadas com as ocorrências de vitimização. Resultados: revela-se que aproximadamente 78% dos estudantes das escolas relataram, pelo menos, uma ocorrência de bullying nos últimos seis meses e 17% sofreram metade das vitimizações totais no mesmo período. Mostraram-se, pela média do bullying entre as escolas, diferenças significantes, e a comparação com dados da literatura indicou preocupação nos graus moderado e severo. Conclusão: conclui-se que as classificações das vitimizações foram consistentes com a literatura. Observaram-se diferenças nas características das vítimas nos diferentes contextos educacionais com a premência de ações interdisciplinares contra o bullying.(AU)


Objective: to categorize victimization by bullying and cyberbullying in adolescents. Method: this is a quantitative, descriptive, exploratory, cross-sectional study with adolescent students from two public schools and two private schools that answered a questionnaire, then the Multidimentional Peer Victimation Scale instrument was used, adapted to measure bullying. The Kruskal-Wallis test was used to compare means and Pearson's correlation to relate the variables studied with the occurrences of victimization. Results: it is revealed that approximately 78% of school students reported at least one occurrence of bullying in the last six months and 17% suffered half of the total victimizations in the same period. Significant differences were shown by the mean of bullying between schools, and the comparison with data in the literature indicated concern in the moderate and severe degrees. Conclusion: it is concluded that the victimization classifications were consistent with the literature. Differences in the characteristics of the victims were observed in different educational contexts with the urgency of interdisciplinary actions against bullying.(AU)


Objetivo: categorizar la victimización por bullying y cyberbullying en adolescentes. Método: este es un estudio cuantitativo, descriptivo, exploratorio, transversal con estudiantes adolescentes de dos escuelas públicas y dos escuelas privadas que respondieron a un cuestionario, luego se usó el instrumento Multidimentional Peer Victimation Scale adaptado para medir el acoso escolar. La prueba de Kruskal-Wallis se utilizó para comparar medias y la correlación de Pearson para relacionar las variables estudiadas con los casos de victimización. Resultados: se revela que aproximadamente el 78% de los estudiantes escolares informaron al menos una ocurrencia de acoso escolar en los últimos seis meses y el 17% sufrió la mitad de las victimizaciones totales en el mismo período. Las diferencias significativas se mostraron por la media de la intimidación entre las escuelas, y la comparación con los datos en la literatura indicó preocupación en los grados moderados y severos. Conclusión: se concluye que las clasificaciones de victimización fueron consistentes con la literatura. Se observaron diferencias en las características de las víctimas en diferentes contextos educativos con la urgencia de acciones interdisciplinarias contra el acoso escolar.(AU)


Subject(s)
Humans , Male , Female , Adolescent , Students , Adolescent , Adolescent Behavior , Bullying , Cyberbullying , Public Health , Epidemiology, Descriptive , Cross-Sectional Studies
5.
Rev. enferm. UFPE on line ; 13: [1-9], 2019. ilus, tab
Article in Portuguese | BDENF - Nursing | ID: biblio-1049696

ABSTRACT

Objetivo: analisar as condições de trabalho percebidas por técnicos de Enfermagem e sua relação com acidentes envolvendo material biológico. Método: trata-se de um estudo misto, descritivo, transversal, realizado em um hospital público. Elencaram-se 275 profissionais que responderam a um questionário com perguntas relacionadas ao número de acidentes, percepção das condições de trabalho e sugestões para minimizá-los. Detalha-se que a pesquisa foi do tipo probabilística aleatória simples, com distribuição proporcional nas unidades e turnos de trabalho e os resultados apresentados a partir de relatos e tabelas. Resultados: declarou-se, por 210 técnicos, ter sofrido acidente de trabalho. Revela-se que as variáveis ritmo de trabalho estressante, monotonia e influência do trabalho na saúde tiveram significância estatística, e o uso de equipamentos de proteção individual e diminuição da sobrecarga foram as medidas mais indicadas pelos respondentes. Conclusão: indicou-se, pela análise, relação positiva entre sobrecarga de trabalho e acidentes com material biológico. Percebe-se que, apesar de a instituição disponibilizar equipamentos de proteção individual aos trabalhadores, há forte indício do não uso ou uso parcial. Podem-se subsidiar, pelo instrumento utilizado nesta pesquisa, ações gerenciais para readequações dos processos de trabalho.(AU)


Objective: to analyze the working conditions perceived by nursing technicians and their relationship with accidents involving biological material. Method: this is a mixed, descriptive, cross-sectional study conducted in a public hospital. 275 professionals answered a questionnaire with questions related to the number of accidents, perception of working conditions and suggestions to minimize them. It is noted that the research was of simple random probability type, with proportional distribution in units and work shifts and the results presented from reports and tables. Results: 210 technicians claimed to have suffered an accident at work. It is revealed that the variables stressful work rhythm, monotony and influence of work on health were statistically significant, and the use of personal protective equipment and decreased overload were the measures most indicated by respondents. Conclusion: the analysis indicated a positive relationship between work overload and accidents with biological material. Although the institution makes personal protective equipment available to workers, there is strong evidence of non-use or partial use. It can be subsidized, by the instrument used in this research, managerial actions to readjust the work processes.(AU)


Objetivo: analizar las condiciones de trabajo percibidas por los técnicos de Enfermería y su relación con los accidentes que involucran material biológico. Método: este es un estudio mixto, descriptivo, transversal realizado en un hospital público. Fueron listados 275 profesionales respondieron un cuestionario con preguntas relacionadas con el número de accidentes, la percepción de las condiciones de trabajo y sugerencias para minimizarlos. Se observa que la investigación fue de tipo de probabilidad aleatoria simple, con distribución proporcional en unidades y turnos de trabajo y los resultados presentados a partir de relatos y tablas. Resultados: 210 técnicos afirmaron haber sufrido un accidente en el trabajo. Se revela que las variables ritmo de trabajo estresante, monotonía e influencia del trabajo en la salud fueron estadísticamente significativas, y el uso de equipo de protección personal y la disminución de la sobrecarga fueron las medidas más indicadas por los encuestados. Conclusión: el análisis indicó una relación positiva entre sobrecarga de trabajo y accidentes con material biológico. Si bien la institución pone a disposición de los trabajadores equipos de protección personal, existe una fuerte evidencia de falta de uso o uso parcial. Puede ser subsidiado, por el instrumento utilizado en esta investigación, acciones de gestión para reajustes de los procesos de trabajo.(AU)


Subject(s)
Perception , Working Conditions , Working Conditions , Occupational Risks , Accidents, Occupational , Occupational Exposure , Occupational Health , Licensed Practical Nurses , Hospitals, Public , Epidemiology, Descriptive , Cross-Sectional Studies , Personal Protective Equipment
6.
BMC Pulm Med ; 18(1): 153, 2018 Sep 14.
Article in English | MEDLINE | ID: mdl-30217179

ABSTRACT

BACKGROUND: The sweat test (ST) is the gold standard for the diagnosis of cystic fibrosis (CF). However, little is known about sweat induction using different types of currents and waves. In this context, our objective was to develop a device to induce sweat and compare the use of continuous constant current (CCC) and continuous pulsed current (CPC) in individuals with CF and healthy controls. METHODS: A prospective cross-sectional study with experimental intervention. The variables of gender, ethnicity, age, and body mass index (BMI) were considered. The method of Gibson and Cooke was used, and the following markers were evaluated: sweat weight, electrical impedance, sufficient sweat amount, and CF diagnosis. Triangular (TPC) or sinusoidal (SPC) pulsed current was applied to the right arm, and CCC was applied to the left arm. RESULTS: The study analyzed 260 individuals, 141/213 (54.2%) were female participants, 135/260 (51.9%) were Caucasians. The distribution of individuals by concentration of chloride at the ST was: (CF) 26/260 (10%); (borderlines) 109/260 (41.9%); (healthy) 97/260 (37.3%); (insufficient weight in sweat) 28/260 (10.8%). No association was observed between the sufficient sweat amount to perform the ST when we compared the currents. However, the SPC showed a higher amount of sweat weight. Using Bland and Altman plot considering the agreement between the sweat chloride values achieved from CPC [SPC and TPC] and CCC, there was no proportional bias and mean values are unrelated and only explain less than 8% of the variation. Moreover, TPC presented higher electrical impedance when compared with SPC and CCC. SPC presented lower electrical impedance and higher sweat weight than CCC. Male participants presented lower electrical impedance and higher sweat weight with CCC and TPC, and higher sweat weight with SPC. CONCLUSIONS: The evaluated currents are safe and able to induce and produce sweat in sufficient quantities for the ST. SPC presented lower electrical impedance when compared with other currents. The use of SPC is recommended to induce sweat in patients with sweat problems. Finally, ethnicity, gender, age and BMI did not influence sweat induction at the ST, and no side effect was observed in our study.


Subject(s)
Chlorides/analysis , Cystic Fibrosis/diagnosis , Sweat/chemistry , Adolescent , Adult , Aged , Biomarkers , Child , Child, Preschool , Cross-Sectional Studies , Electric Impedance , Female , Humans , Infant , Male , Middle Aged , Prospective Studies , Reproducibility of Results , Sodium/analysis , Specimen Handling , Young Adult
7.
Rev. bras. cir. cardiovasc ; 28(4): 462-469, out.-dez. 2013. ilus
Article in English | LILACS | ID: lil-703113

ABSTRACT

INTRODUCTION: In vitro hydrodynamic characterization of prosthetic heart valves provides important information regarding their operation, especially if performed by noninvasive techniques of anemometry. Once velocity profiles for each valve are provided, it is possible to compare them in terms of hydrodynamic performance. In this first experimental study using laser doppler anemometry with mechanical valves, the simulations were performed at a steady flow workbench. OBJECTIVE: To compare unidimensional velocity profiles at the central plane of two bi-leaflet aortic prosthesis from St. Jude (AGN 21 - 751 and 21 AJ - 501 models) exposed to a steady flow regime, on four distinct sections, three downstream and one upstream. METHODS: To provide similar conditions for the flow through each prosthesis by a steady flow workbench (water, flow rate of 17L/min.) and, for the same sections and sweeps, to obtain the velocity profiles of each heart valve by unidimensional measurements. RESULTS: It was found that higher velocities correspond to the prosthesis with smaller inner diameter and instabilities of flow are larger as the section of interest is closer to the valve. Regions of recirculation, stagnation of flow, low pressure, and flow peak velocities were also found. CONCLUSIONS: Considering the hydrodynamic aspect and for every section measured, it could be concluded that the prosthesis model AGN 21 - 751 (RegentTM) is superior to the 21 AJ - 501 model (Master Series). Based on the results, future studies can choose to focus on specific regions of the these valves.


INTRODUÇÃO: A caracterização hidrodinâmica in vitro de próteses de válvulas cardíacas fornece informações importantes quanto ao seu funcionamento, sobretudo se realizada por meio de métodos não-invasivos de anemometria. Uma vez obtidos os perfis de velocidade para cada válvula, é possível compará-las quanto ao seu desempenho hidrodinâmico. Neste primeiro estudo experimental de anemometria laser com válvulas mecânicas, as simulações foram realizadas em bancada de testes para escoamento permanente. OBJETIVO: Comparar perfis de velocidade unidimensional no plano central de duas próteses aórticas de duplo folheto St. Jude (modelos AGN 21 - 751 e 21 AJ - 501) submetidas a um regime de fluxo permanente, para quatro seções distintas, três à jusante e uma à montante. MÉTODOS: Proporcionar condições de similaridade para o escoamento através de cada prótese, por meio de bancada hidrodinâmica para escoamento permanente (água, à vazão de 17 L/min.) e, por meio de anemometria laser unidimensional, obter os perfis de velocidades para as mesmas seções e varreduras. RESULTADOS: Verificou-se que as maiores velocidades correspondem à prótese de diâmetro interno menor e que as instabilidades do fluxo são maiores à medida que a seção de interesse encontra-se mais próxima da válvula. Também foram verificadas as regiões de recirculação, de estagnação do fluxo e de baixa pressão, além dos picos de velocidade para o escoamento em questão. CONCLUSÕES: Sob o aspecto hidrodinâmico e para todas as seções de interesse, foi possível concluir a preferência da válvula de modelo AGN 21 - 751 (RegentTM) sobre a 21 AJ - 501 (Master Series). Os resultados obtidos permitiram escolher, para os próximos trabalhos, um foco de estudo mais específico para regiões concretas dessas próteses.


Subject(s)
Blood Flow Velocity , Heart Valve Prosthesis , Hydrodynamics , Laser-Doppler Flowmetry/methods , Materials Testing , Medical Illustration , Models, Cardiovascular , Pressure , Prosthesis Design , Reproducibility of Results , Time Factors
8.
Rev. bras. cir. cardiovasc ; 27(4): 535-541, out.-dez. 2012. tab
Article in Portuguese | LILACS | ID: lil-668115

ABSTRACT

INTRODUÇÃO: A circulação extracorpórea (CEC) é indispensável para a maioria das operações cardíacas, mas causa danos significantes ao sangue, dentre eles a hemólise. OBJETIVO: Quantificar as taxas de hemólise em diferentes tempos nas operações para revascularização do miocárdio com uso de CEC. MÉTODOS: Foram medidas as taxas de hemólise de 22 pacientes em 6 tempos distintos durante a revascularização do miocárdio com uso de CEC: T0 - antes do início da CEC, T1 - 5 minutos após o início da CEC, T2 - com 30 minutos de CEC, T3 - imediatamente antes do despinçamento da aorta, T4 - imediatamente antes da passagem do volume residual para o paciente e T5 - 5 minutos após o término da passagem do volume residual para o paciente. Foram calculadas as taxas de hemólise entre os intervalos de tempo: T0-T1; T1-T2; T2-T3; T3-T4 e T4-T5. RESULTADOS: Os primeiros 5 minutos após a CEC demonstraram maior taxa de hemólise (P = 0,0003) em comparação às outras taxas calculadas, representando 29% da hemólise total até T4 (imediatamente antes da passagem do volume residual para o paciente). CONCLUSÃO: Não foram observadas variações significantes nas taxas de hemólise durante a aspiração na raiz da aorta (P > 0,38) nem com o procedimento utilizado para a passagem do volume residual de sangue no circuito para os pacientes.


INTRODUCTION: Extracorporeal circulation (EC) is very important in cardiac surgery but causes significant damage to the blood, including hemolysis. OBJECTIVE: To quantify the rate of hemolysis at different times during EC in elective coronary artery bypass grafting. METHODS: We measured rates of hemolysis of 22 patients at 6 different times during myocardial revascularization during EC: T0 - before the start of EC, T1 - five minutes after of the EC initiation, T2 - 30 minutes of EC, T3 - immediately before the aortic unclamping, T4 - immediately before passage of the residual volume to the patient and T5 - five minutes after the passage of the residual volume to the patient. Rates of hemolysis were calculated between the intervals of time: T0-T1; T1-T2; T2-T3; T3-T4 and T4-T5. RESULTS: The first 5 minutes after the EC showed the highest rate of hemolysis (P = 0.0003) compared to the others calculated rates, representing 29% of the total haemolysis until T4 (Immediately before passage of the residual volume to the patient). CONCLUSION: There were no significant changes in the rate of hemolysis during the suction in the aortic root (P> 0.38), nor with the procedure used for the passage of the residual volume of blood in the circuit to the patient.


Subject(s)
Female , Humans , Male , Middle Aged , Coronary Artery Bypass/methods , Extracorporeal Circulation/adverse effects , Hemolysis/physiology , Analysis of Variance , Blood Specimen Collection/methods , Blood Specimen Collection/statistics & numerical data , Extracorporeal Circulation/methods , Statistics, Nonparametric , Time Factors
9.
Rev Bras Cir Cardiovasc ; 27(4): 535-41, 2012 Dec.
Article in English, Portuguese | MEDLINE | ID: mdl-23515726

ABSTRACT

INTRODUCTION: Extracorporeal circulation (EC) is very important in cardiac surgery but causes significant damage to the blood, including hemolysis. OBJECTIVE: To quantify the rate of hemolysis at different times during EC in elective coronary artery bypass grafting. METHODS: We measured rates of hemolysis of 22 patients at 6 different times during myocardial revascularization during EC: T0 - before the start of EC, T1 - five minutes after of the EC initiation, T2 - 30 minutes of EC, T3 - immediately before the aortic unclamping, T4 - immediately before passage of the residual volume to the patient and T5 - five minutes after the passage of the residual volume to the patient. Rates of hemolysis were calculated between the intervals of time: T0-T1; T1-T2; T2-T3; T3-T4 and T4-T5. RESULTS: The first 5 minutes after the EC showed the highest rate of hemolysis (P = 0.0003) compared to the others calculated rates, representing 29% of the total haemolysis until T4 (Immediately before passage of the residual volume to the patient). CONCLUSION: There were no significant changes in the rate of hemolysis during the suction in the aortic root (P> 0.38), nor with the procedure used for the passage of the residual volume of blood in the circuit to the patient.


Subject(s)
Coronary Artery Bypass/methods , Extracorporeal Circulation/adverse effects , Hemolysis/physiology , Analysis of Variance , Blood Specimen Collection/methods , Blood Specimen Collection/statistics & numerical data , Extracorporeal Circulation/methods , Female , Humans , Male , Middle Aged , Statistics, Nonparametric , Time Factors
10.
Rev Bras Cir Cardiovasc ; 26(2): 205-12, 2011.
Article in English, Portuguese | MEDLINE | ID: mdl-21894410

ABSTRACT

INTRODUCTION: Roller pumps play an important role in extracorporeal circulation. However, occlusion of the rollers should be adequately performed and this can be adjusted mainly by two methods: static and dynamic. OBJECTIVE: To investigate how the Brazilian perfusionists adjust arterial roller pumps in their services and evaluate the application of a Device to Assist Calibration (DAC) that facilitates roller adjustment by the dynamic calibration method. METHODS: We installed a roller pump with accessories to perform adjustment by drop rate (static calibration) and dynamic calibration methods during the XXVIII Brazilian Congress of Extracorporeal Circulation. Perfusionists were asked to adjust the roller pump according to the procedure they usually do in their service. After each adjustment pressure was measured by dynamic calibration method with DAC. The research was approved by the Research Ethics Committee of UNICAMP, Nº 1144/2010. RESULTS: There were 56 perfusionists in this study. Pressure average of 56 measurements of dynamic calibration was 434 ± 214 mmHg; 76% of measurements were within the recommended range for the use of the dynamic calibration method (between 150 and 500 mmHg). CONCLUSION: Brazilian perfusionists tend to adjust roller pumps with less occlusive settings. The amplitudes of the dynamic calibration pressure tend to be smaller for more experienced perfusionists because their skills increase with time. The device can be used by the perfusionist to adjust roller pumps with greater accuracy and mainly repeatability in few minutes.


Subject(s)
Extracorporeal Circulation/instrumentation , Infusion Pumps/standards , Adult , Allied Health Occupations , Calibration , Female , Humans , Male , Middle Aged , Young Adult
11.
Rev. bras. cir. cardiovasc ; 26(2): 205-212, abr.-jun. 2011. ilus, tab
Article in Portuguese | LILACS | ID: lil-597740

ABSTRACT

INTRODUÇÃO: Bombas de roletes desempenham um papel importante na circulação extracorpórea. No entanto, a oclusão dos roletes das bombas deve ser realizada de forma adequada e estas podem ser ajustadas, principalmente por dois métodos: estático e dinâmico. OBJETIVO: Investigar como os perfusionistas brasileiros ajustam as bombas de rolete arterial em seus serviços e testar o uso de um Dispositivo Auxiliar de Calibração que facilita o ajuste pelo método de calibração dinâmica. MÉTODOS: Foi instalada uma bomba de roletes com os acessórios necessários para a realização de sua calibração pelos métodos de velocidade de queda (calibração estática) e calibração dinâmica durante o XXVIII Congresso Brasileiro de Circulação Extracorpórea. Foi solicitado aos perfusionistas que ajustassem uma bomba de roletes conforme procedimento normalmente utilizado em seu serviço. Após cada regulagem, foi medida a respectiva pressão pelo método de calibração dinâmica com o auxílio do dispositivo. O projeto foi aprovado pelo Comitê de Ética em Pesquisa da UNICAMP, sob Nº 1144/2010. RESULTADOS: Participaram da pesquisa 56 perfusionistas. A média das 56 medidas de pressão de calibração dinâmica foi 434 ± 214 mmHg; 76 por cento das medidas realizadas ficaram no intervalo preconizado para o uso da técnica de calibração dinâmica (entre 150 e 500 mmHg). CONCLUSÃO: Os perfusionistas brasileiros tendem a calibrar bombas de roletes com ajustes menos oclusivos. As amplitudes das medidas de pressão de calibração dinâmica tendem a ser menores para perfusionistas mais experientes. O dispositivo pode ser utilizado por perfusionistas para ajustar bombas de roletes com maior precisão e, principalmente, repetitividade e em alguns minutos.


INTRODUCTION: Roller pumps play an important role in extracorporeal circulation. However, occlusion of the rollers should be adequately performed and this can be adjusted mainly by two methods: static and dynamic. OBJECTIVE: To investigate how the Brazilian perfusionists adjust arterial roller pumps in their services and evaluate the application of a Device to Assist Calibration (DAC) that facilitates roller adjustment by the dynamic calibration method. METHODS: We installed a roller pump with accessories to perform adjustment by drop rate (static calibration) and dynamic calibration methods during the XXVIII Brazilian Congress of Extracorporeal Circulation. Perfusionists were asked to adjust the roller pump according to the procedure they usually do in their service. After each adjustment pressure was measured by dynamic calibration method with DAC. The research was approved by the Research Ethics Committee of UNICAMP, Nº 1144/2010. RESULTS: There were 56 perfusionists in this study. Pressure average of 56 measurements of dynamic calibration was 434 ± 214 mmHg; 76 percent of measurements were within the recommended range for the use of the dynamic calibration method (between 150 and 500 mmHg). CONCLUSION: Brazilian perfusionists tend to adjust roller pumps with less occlusive settings. The amplitudes of the dynamic calibration pressure tend to be smaller for more experienced perfusionists because their skills increase with time. The device can be used by the perfusionist to adjust roller pumps with greater accuracy and mainly repeatability in few minutes.


Subject(s)
Adult , Female , Humans , Male , Middle Aged , Young Adult , Extracorporeal Circulation/instrumentation , Infusion Pumps/standards , Allied Health Occupations , Calibration
12.
Rev. bras. eng. biomed ; 26(1): 25-32, abr. 2010. ilus, tab, graf
Article in Portuguese | LILACS | ID: lil-570336

ABSTRACT

As bombas de roletes ocupam um papel de destaque entre os dispositivos utilizados na circulação extracorpórea, pois são responsáveis pela movimentação do sangue. O ajuste adequado desses equipamentos é fundamental para minimizar o trauma nas células sanguíneas. O presente trabalho analisou dois métodos para ajuste das bombas: o método de medida de velocidade de queda e a calibração dinâmica em dois modelos de bombas, com o objetivo de avaliar as suas variações e limitações práticas de uso em centro cirúrgico. A velocidade de queda foi medida em dois modelos de bombas de roletes e em três pontos do leito rígido com valor final calculado pela média entre eles. A calibração dinâmica foi medida sequencialmente às medidas de velocidade de queda, e os valores médios de pressão foram registrados em arquivo, com intervalo entre medidas de 20 ms. Os valores médios de velocidade de queda mostraram diferenças significantes (p < 0,0007), quando comparados com os valores mínimos e entre os dois modelos de bombas. Nos dois métodos analisados foram observadas variações de ajuste entre os roletes, com possíveis consequências para a hemólise. A bomba 1 mostrou descentralização do leito rígido entre os pontos medidos (p < 0,02). O método de ajuste por medida de velocidade de queda mostrou erros em seus valores absolutos e com dificuldade de repetitividade e não foi possível estabelecer correlação com a respectiva medida de calibração dinâmica.


Roller pumps have an important role among the devices used in cardiopulmonary bypass, being responsible for pumping blood. The setting of pumps is essential to minimize the trauma on blood cells. This study examined two methods for pump adjustment: the drop rate method and dynamic calibration method, applied to two different pumps in order to evaluate their variations and practical limitations of use in operating room. The drop rate was measured in the lowest point of pump raceway (0º) and in two other points close to it (–20º and +20º) and the average values of the three points was also taken. The dynamic calibration was measured sequentially, and the pressure average values were recorded on file with a sampling interval of 20 ms. There were significant differences (p < 0.0007) in drop rate averages when compared with the lowest point in the two types of pumps. In two pumps were observed variations in settings between rollers with possible consequences for the hemolysis. The pump 1 showed decentralization in raceway between points measured (p < 0.02). The drop rate method showed errors in their absolute values and with limited repeatability, and it was not possible to correlate with their dynamic calibration measurements.


Subject(s)
Extracorporeal Circulation/instrumentation , Extracorporeal Circulation/standards , Calibration , Pulsatile Flow , Hemolysis , Hydrodynamic Models/methods , Cardiopulmonary Bypass/instrumentation
13.
Rev. bras. cir. cardiovasc ; 24(4): 533-539, out.-dez. 2009. ilus, graf
Article in English, Portuguese | LILACS | ID: lil-540756

ABSTRACT

Objetivo: Um dos maiores danos causados pela oclusão em bombas de rolete é a hemólise. Estudos comparativos entre bomba de roletes com ajustes não oclusivos e bombas centrífugas têm sido realizados nas últimas décadas na tentativa de desenvolver novos produtos e ajustes que causem menos trauma aos elementos figurados do sangue. Comumente as bombas de rolete são ajustadas pelo método estático devido à preocupação com fluxos variáveis que podem ocorrer com ajustes não oclusivos. Folga excessiva nos roletes permite refluxo e pode acarretar erros no cálculo dos fluxos pela rotação da bomba, de acordo com os dispositivos adicionados ao circuito e a resistência sistêmica do paciente. O objetivo desse trabalho é avaliar o refluxo causado por dois modelos de bombas de rolete em aspirador de sangue e em reservatório de cardiotomia. Métodos: A visualização do refluxo foi realizada em aspirador de sangue e, em reservatório de cardiotomia, a visualização foi acompanhada de respectiva medida. Foram testados dois modelos de bombas de rolete de diferentes fabricantes, ajustadas pelo método de velocidade de queda e calibração dinâmica. Os testes foram conduzidos com tubos de silicone de 3/8 x 1/16 e 1/2 x 3/32 polegadas de diâmetro em água e solução análoga ao sangue. Resultados: Foram registrados visualmente os refluxos em aspirador de sangue e em reservatório de cardiotomia, com respectiva medida dos valores. As bombas apresentaram diferenças nos refluxos medidos ajustadas pelo método de calibração dinâmica. A bomba #2 apresentou refluxo, ajustada totalmente ocluída. Conclusão: Os refluxos medidos nos dois modelos de bomba apresentaram diferenças (P<0,008). Os resultados indicam diferenças nas características construtivas ocasionadas pelo processo de fabricação, projeto ou possíveis desgastes. Ajustes pouco oclusivos podem proporcionar variações nos fluxos com a resistência adicionada ao circuito, com dificuldade de correção do fluxo pelo incremento da rotação.


Objective: One of the major damage caused by occlusion in roller pumps is hemolysis. Comparative studies between roller pump with adjustments non occlusive and centrifugal pumps have been made in recent decades in an attempt to develop new products and adjustments that cause fewer traumas to the figurative elements of blood. Usually the roller pumps are adjusted by the static method due to concern variables flow that can occur with non-occlusive settings. Excessive slack in the rollers provoke back flow and can provides errors in the calculation of flow by the rotation of the pump, according to the devices added to the circuit and the systemic resistance of the patient. The objective of this study is to evaluate the back flow caused by two types of roller pumps in blood aspirator and cardiotomy reservoir. Method: Back flow visualization was performed in blood aspirator and cardiotomy reservoir. It was tested two different models of roller pumps, adjusted by drop rate and dynamic calibration. The tests were conducted with silicone tubes of 3/8 x 1/16 e 1/2 x 3/32 inches in diameter in water and solution similar to blood. Results: We recorded back flow visually in blood aspirator and in cardiotomy reservoir with their measure of values. The pumps had differences in refluxes measured adjusted by the dynamic calibration method. Pump#2 presents back flow adjusted fully occluded. Conclusion: The back flow measured in two models of pump present differences (P <0.008). The results indicate differences in its characteristics caused by the process of manufacturing, design or possible wear. Non-occlusive adjustments may cause variations in flow with the increase of resistance added to the circuit, with difficulty to fix the flow by increasing the rotation.


Subject(s)
Blood Circulation , Cardiopulmonary Bypass/instrumentation , Hemodynamics/physiology , Analysis of Variance , Calibration , Equipment Design
14.
Rev. bras. cir. cardiovasc ; 24(2): 188-193, abr.-jun. 2009. ilus, tab
Article in English, Portuguese | LILACS | ID: lil-525550

ABSTRACT

OBJETIVO: Dentre os equipamentos utilizados em circulação extracorpórea, as bombas de rolete têm grande importância, com diversos modelos disponíveis de vários fabricantes. A calibração é um fator importante nas taxas de hemólise e o seu potencial difere em cada uma delas. Pesquisadores nem sempre abordam detalhes sobre os perfis do leito rígido, supondo que as formas padronizadas de calibração garantem valores iguais e comparáveis para todos os modelos de bombas de rolete. Dispomos principalmente de dois métodos para a calibração das bombas, o que também interfere com o potencial hemolítico. Nenhum dos métodos considera as características de impulsão do fluído, definido pela forma construtiva do leito rígido. O objetivo é avaliar o perfil hidrodinâmico de três modelos de bombas de roletes disponíveis no mercado brasileiro. MÉTODOS: A oclusão dos roletes foi feita por medidas de velocidade de queda e calibração dinâmica. Foram utilizados dois diferentes diâmetros de tubos de silicone (3/8 x 1/16 e 1/2 x 3/32 polegadas). RESULTADOS: Os perfis apresentaram diferenças em suas variâncias. P<0,01 para medidas de velocidade de queda e P<0,0001 para medidas de calibração dinâmica. Foram encontradas diferenças nas variações de pressão entre as bombas analisadas (P<0,002). CONCLUSÃO: As medidas de oclusão são dependentes da forma do leito rígido e comparações envolvendo bombas de rolete devem ser feitas com cautela. Testes com sangue deveriam ser realizados para verificar a influência das variações de pressão na hemólise.


OBJECTIVE: Among the equipments used in cardiopulmonary bypass the roller pumps have great importance with various models available from several manufacturers. The calibration is an important factor in hemolysis rates and its potential is different in each. Researchers do not always approach details on the pump bed profiles assuming that the standardized calibration settings ensure equal and comparable values for all models of roller pumps. We have mainly two methods for calibration of pumps which also interferes on the hemolytic potential. In both of them, the characteristics of fluid impulsion defined by the pump bed design are not considered. The aim of this study is to compare the hydrodynamic profile of three models of roller pumps available in the Brazilian market. METHODS: The rollers occlusion was performed by measures of drop and dynamic calibration. Two different silicone diameter tubes were used (3/8 x 1/16 and 1/2 x 3/32 inches). RESULTS: The profiles showed differences in their variances, P<0.01 for drop rate measures and P<0.0001 for dynamic calibration. Different changes in pressure were found between the pumps analyzed (P<0.002). CONCLUSION: The measures of occlusion are dependent on the design of the pump bed and comparisons involving roller pumps should be performed with caution. Blood tests should be performed to verify the influence of changes in hemolysis pressure.


Subject(s)
Cardiopulmonary Bypass/instrumentation , Pulsatile Flow/physiology , Analysis of Variance , Brazil , Calibration , Equipment Design , Linear Models
15.
Rev Bras Cir Cardiovasc ; 24(4): 533-9, 2009.
Article in English, Portuguese | MEDLINE | ID: mdl-20305927

ABSTRACT

OBJECTIVE: One of the major damage caused by occlusion in roller pumps is hemolysis. Comparative studies between roller pump with adjustments non occlusive and centrifugal pumps have been made in recent decades in an attempt to develop new products and adjustments that cause fewer traumas to the figurative elements of blood. Usually the roller pumps are adjusted by the static method due to concern variables flow that can occur with non-occlusive settings. Excessive slack in the rollers provoke back flow and can provides errors in the calculation of flow by the rotation of the pump, according to the devices added to the circuit and the systemic resistance of the patient. The objective of this study is to evaluate the back flow caused by two types of roller pumps in blood aspirator and cardiotomy reservoir. METHOD: Back flow visualization was performed in blood aspirator and cardiotomy reservoir. It was tested two different models of roller pumps, adjusted by drop rate and dynamic calibration. The tests were conducted with silicone tubes of 3/8 x 1/16 e 1/2 x 3/32 inches in diameter in water and solution similar to blood. RESULTS: We recorded back flow visually in blood aspirator and in cardiotomy reservoir with their measure of values. The pumps had differences in refluxes measured adjusted by the dynamic calibration method. Pump#2 presents back flow adjusted fully occluded. CONCLUSION: The back flow measured in two models of pump present differences (P <0.008). The results indicate differences in its characteristics caused by the process of manufacturing, design or possible wear. Non-occlusive adjustments may cause variations in flow with the increase of resistance added to the circuit, with difficulty to fix the flow by increasing the rotation.


Subject(s)
Blood Circulation , Cardiopulmonary Bypass/instrumentation , Hemodynamics/physiology , Analysis of Variance , Calibration , Equipment Design
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