Fernanda Catelani | Universidade Federal do Rio de Janeiro (UFRJ) (original) (raw)

Papers by Fernanda Catelani

Proceedings of Meetings on Acoustics, 2013

Biomedical Physics & Engineering Express, Aug 11, 2021

The quantitative ultrasound technique was used to evaluate bone-mimicking phantoms; however, thes... more The quantitative ultrasound technique was used to evaluate bone-mimicking phantoms; however, these phantoms do not mimic the intermediate stages of cortical bone healing. We propose using windshield glass as an original material to produce phantoms that mimic the characteristics of three different stages of cortical bone healing. This material was processed via a route that included breaking, grinding, compacting, drying, and sintering in four temperature groups: 625 °C, 645 °C, 657 °C, and 663 °C. The parameters evaluated were the ultrasonic longitudinal phase velocity ( cL ), corrected ( αc ) ultrasonic attenuation coefficient, and bulk density ( ρs ). The results showed that the mean values of cL, αc, and ρs varied from 2, 398 to 4, 406 m·s−1, 3 to 10 dB·cm−1, and 1, 563 to 2, 089 kg·m−3, respectively. The phantoms exhibited properties comparable with the three stages of cortical bone healing and can be employed in diagnostic and therapeutic studies using ultrasound.

Sao Paulo Medical Journal, 2015

CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retract... more CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retractions are important events that deserve scientific investigation. This study aimed to characterize cases of retraction within general and internal medicine in a high-profile database, with interest in the country of origin of the article and the impact factor (IF) of the journal in which the retraction was made. DESIGN AND SETTING: This study consisted of reviewing retraction notes in the Thomson-Reuters Web of Knowledge (WoK) indexing database, within general and internal medicine. METHODS: The retractions were classified as plagiarism/duplication, error, fraud and authorship problems and then aggregated into two categories: "plagiarism/duplication" and "others." The countries of origin of the articles were dichotomized according to the median of the indicator "citations per paper" (CPP), and the IF was dichotomized according to its median within general and...

Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability ... more Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability to stimulate the consolidation process for normal or pathological fracture. However, the action mechanisms of ultrasound, as well as its propagation modes in bone, are still not completely understood. This study evaluated the parameters Integrated Reflection Coefficient (IRC), the Frequency Slope Integrated Reflection (FSIR) and Sound Pressure Level (SPL) through a pulse-echo propagation in a phantom of cortical bone and through 2D computational simulation, including five transverse fracture gaps (0, 1, 2, 3 and 4 mm) with and without the presence of an intramedullary nailing (IN). The results showed a correlation between IRC and SPL and these with the size of the fracture and the echoes of the evaluated interfaces, while FSIR helped to identify the presence of IN in combination with other parameters. The simulations followed the trend of the experimental results. It was concluded that t...

Tecnicas manuais para a avaliacao do tonus muscular sao de uso comum na pratica clinica para aval... more Tecnicas manuais para a avaliacao do tonus muscular sao de uso comum na pratica clinica para avaliacao da espasticidade. Os dinamometros isocineticos, porem, utilizam um motor e uma celula de carga, fornecendo a respectiva medida de torque necessaria para a geracao do movimento articular. O objetivo do estudo foi descrever o desenvolvimento e testar um Sistema Isocinetico de Quantificacao Mecânica para Pequenos Animais (SQMA), por meio da mobilizacao do tornozelo de 6 ratos femeas Wistar. Valores do coeficiente de elasticidade (K) foram obtidos utilizando-se o modelo massa-mola-amortecedor. O equipamento foi capaz de detectar a caracteristica deslocamento-dependente do tonus de ratos saudaveis, constatada por coeficientes de elasticidade (K) de cerca de 3•10-3 N•m/°. O trabalho mostrou que o primeiro prototipo do SQMA, tambem pode vir a ser utilizado para a quantificacao da espasticidade, com base nos valores dos coeficientes de elasticidade (K) obtidos.

A artrite reumatoide (AR) e uma doenca reumatica, inflamatoria, sistemica, cronica, de etiologia ... more A artrite reumatoide (AR) e uma doenca reumatica, inflamatoria, sistemica, cronica, de etiologia desconhecida e que acomete grandes e pequenas articulacoes, podendo levar a incapacidade funcional, sendo de maior prevalencia no sexo feminino. Alem do uso de farmacos, o tratamento da AR engloba diversas modalidades terapeuticas. O objetivo deste trabalho foi avaliar a frequencia de utilizacao de alguns recursos terapeuticos em uma paciente com AR do adulto e sua relacao com as queixas relatadas durante o periodo de tratamento fisioterapeutico. Este e um estudo longitudinal, retrospectivo e descritivo englobando o periodo de dois anos. Concluiu-se que os exercicios terapeuticos de fortalecimento muscular e resistencia aerobia estiveram associados com a reducao do quadro algico, bem como com a melhora da auto-estima e facilidade para a realizacao de atividades diarias.

nesc.ufrj.br

Resumo O objetivo do presente trabalho foi analisar a comparabilidade de Fatores de Impacto (FIs)... more Resumo O objetivo do presente trabalho foi analisar a comparabilidade de Fatores de Impacto (FIs) de revistas científicas a partir de três bancos de dados: o ISI Thompson (Web of Science), o Scopus ea Scielo, ano-base 2006. Para tal, a faixa de variação dos FIs em ...

Biomedical Physics & Engineering Express

Theoretical Issues in Ergonomics Science

Journal of Therapeutic Ultrasound, 2016

Background: Low-intensity physiotherapeutic ultrasound has been used in physical therapy clinics;... more Background: Low-intensity physiotherapeutic ultrasound has been used in physical therapy clinics; however, there remain some scientific issues regarding the bone-healing process. The objective of this study was to investigate the influence of low-intensity physiotherapeutic ultrasound on the initial stage of bone healing in rats. Methods: Twenty-two male adult rats were assessed quantitatively and qualitatively using radiographic, biochemical, and histological analyses. Numerical simulations were also performed. Fractures in animals in the ultrasound group (n = 11) were treated with low-intensity ultrasound (pulsed mode, duty cycle 20 %) for 10 min daily at an intensity of 40 mW/cm 2 SATA (1.0 MHz) for 10 days. Fractures in animals in the control group (n = 11) were not treated. Results: Alkaline phosphatase levels were non-significantly higher in the ultrasound group than in the control group in the time intervals considered (t(13) = 0.440; 95 % confidence interval (CI) −13.79 to 20.82; p = 0.67). Between-group serum calcium levels were also not significantly different (t(13) = −0.842; 95 % CI −0.48 to 0.21; p = 0.42). Finally, there were no significant differences in radiological scores between the two groups (U = 118; 95 % CI −1.99 to 1.99; p = 0.72). However, the diameter of the newly formed bone tissue was greater and more evident in the ultrasound group. Conclusions: Thirteen days after fracture, there was no significant between-group differences in bone-healing processes, although the increased alkaline phosphatase levels and diameter of new bone tissue need to be further investigated.

Research Integrity and Peer Review, 2016

Conferences were established as global forums for discussion of ideas, policies and empirical fin... more Conferences were established as global forums for discussion of ideas, policies and empirical findings related to the responsible conduct of research. The Conferences aim to galvanise the global effort to strengthen the trustworthiness and reliability of research and encourage researchers worldwide to be accountable for their findings. Earlier conferences were held in Lisbon (2007), Singapore (2010) and Montréal (2010). The Rio conference attracted over 470 delegates from 42 countries, including leaders of research institutions and funding agencies, policy makers, editors and publishers, legal experts, researchers and graduate students. The theme of the conference was Research Rewards and Integrity: Improving Systems to Promote Responsible Research. These Proceedings contain the abstracts of the presentations given at the 4th World Conference in concurrent sessions, partner symposia, and poster sessions. Also included are summaries of the discussions in three focus tracks, which allowed delegates to consider and work on questions about the roles of funders, institutions, and countries in improving research systems and strengthening research integrity. Videos of the plenary presentations are available at the conference website (www.wcri2015.org).

Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the r... more Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the release of inflammatory mediators and subsequent bone formation. The reamed intramedullary nailing (with the same diameter of the medullary cavity) is a surgical procedure widely used in Medicine. The aim of this work was to study ultrasound propagation inside fractures with and without reamed intramedullary nailing using 2D simulations. It was used a custom-made simulation code applied to numerical models (a 4-mm thick cortical plate, a medullary cavity with radius 4 mm with and without reamed nailing, and fracture gaps varying from 1 to 3 mm). A 1-MHz emitter was positioned above fracture center and fourteen receptor transducers were uniformly placed inside fracture gap. The acquired signals were used to estimate the time-of-flight of the first arriving signal (TOF) and the energy amplitude by means of the root mean square (RMS). TOF was slightly influenced by fracture gap variations. It was observed an increase in RMS values with the presence of metal nailing, due to the reflection in the interface water-metal. The receptors placed near cortical plates received more energy (constructive interference between the direct and lateral waves). For the case of reamed nailing, ultrasound stimulation may be intensified.

Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the r... more Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the release of inflammatory mediators and subsequent bone formation. The reamed intramedullary nailing (with the same diameter of the medullary cavity) is a surgical procedure widely used in Medicine. The aim of this work was to study ultrasound propagation inside fractures with and without reamed intramedullary nailing using 2D simulations. It was used a custom-made simulation code applied to numerical models (a 4-mm thick cortical plate, a medullary cavity with radius 4 mm with and without reamed nailing, and fracture gaps varying from 1 to 3 mm). A 1-MHz emitter was positioned above fracture center and fourteen receptor transducers were uniformly placed inside fracture gap. The acquired signals were used to estimate the time-of-flight of the first arriving signal (TOF) and the energy amplitude by means of the root mean square (RMS). TOF was slightly influenced by fracture gap variations. It was observed an increase in RMS values with the presence of metal nailing, due to the reflection in the interface water-metal. The receptors placed near cortical plates received more energy (constructive interference between the direct and lateral waves). For the case of reamed nailing, ultrasound stimulation may be intensified.

Littera Docente Discente Em Revista, Jun 7, 2013

A artrite reumatóide (AR) é uma doença reumática, inflamatória, sistêmica, crônica, de etiologia ... more A artrite reumatóide (AR) é uma doença reumática, inflamatória, sistêmica, crônica, de etiologia desconhecida e que acomete grandes e pequenas articulações, podendo levar à incapacidade funcional, sendo de maior prevalência no sexo feminino. Além do uso de fármacos, o tratamento da AR engloba diversas modalidades terapêuticas. O objetivo deste trabalho foi avaliar a frequência de utilização de alguns recursos terapêuticos em uma paciente com AR do adulto e sua relação com as queixas relatadas durante o período de tratamento fisioterapêutico. Este é um estudo longitudinal, retrospectivo e descritivo englobando o período de dois anos. Concluiu-se que os exercícios terapêuticos de fortalecimento muscular e resistência aeróbia estiveram associados com a redução do quadro álgico, bem como com a melhora da auto-estima e facilidade para a realização de atividades diárias.

Littera Docente Discente Em Revista, Dec 13, 2013

Técnicas manuais para a avaliação do tônus muscular são de uso comum na prática clínica para aval... more Técnicas manuais para a avaliação do tônus muscular são de uso comum na prática clínica para avaliação da espasticidade. Os dinamômetros isocinéticos, porém, utilizam um motor e uma célula de carga, fornecendo a respectiva medida de torque necessária para a geração do movimento articular. O objetivo do estudo foi descrever o desenvolvimento e testar um Sistema Isocinético de Quantificação Mecânica para Pequenos Animais (SQMA), por meio da mobilização do tornozelo de 6 ratos fêmeas Wistar. Valores do coeficiente de elasticidade (K) foram obtidos utilizando-se o modelo massa-mola-amortecedor. O equipamento foi capaz de detectar a característica deslocamento-dependente do tônus de ratos saudáveis, constatada por coeficientes de elasticidade (K) de cerca de 3·10 -3 N·m/°. O trabalho mostrou que o primeiro protótipo do SQMA, também pode vir a ser utilizado para a quantificação da espasticidade, com base nos valores dos coeficientes de elasticidade (K) obtidos.

Science and Engineering Ethics, 2015

This study focuses on retraction notices from two major Latin American/Caribbean indexing databas... more This study focuses on retraction notices from two major Latin American/Caribbean indexing databases: SciELO and LILACS. SciELO includes open scientific journals published mostly in Latin America/the Caribbean, from which 10 % are also indexed by Thomson Reuters Web of Knowledge Journal of Citation Reports (JCR). LILACS has a similar geographical coverage and includes dissertations and conference/symposia proceedings, but it is limited to publications in the health sciences. A search for retraction notices was performed in these two databases using the keywords "retracted", "retraction" "withdrawal", "withdrawn", "removed" and "redress". Documents were manually checked to identify those that actually referred to retractions, which were then analyzed and categorized according to the reasons alleged in the notices. Dates of publication/retraction and time to retraction were also recorded. Searching procedures were performed between June and December 2014. Thirty-one retraction notices were identified, fifteen of which were in JCR-indexed journals. "Plagiarism" was alleged in six retractions of this group. Among the non-JCR journals, retraction reasons were alleged in fourteen cases, twelve of which were attributed to "plagiarism". The proportion of retracted articles for the SciELO database was approximately 0.005 %. The reasons alleged in retraction notices may be used as signposts to inform discussions in Latin America on plagiarism and research integrity. At the international level, these results suggest that the correction of the literature is becoming global and is not limited to mainstream international publications.

Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability ... more Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability to stimulate the consolidation process for normal or pathological fracture. However, the action mechanisms of ultrasound, as well as its propagation modes in bone, are still not completely understood. This study evaluated the parameters Integrated Reflection Coefficient (IRC), the Frequency Slope Integrated Reflection (FSIR) and Sound Pressure Level (SPL) through a pulse-echo propagation in a phantom of cortical bone and through 2D computational simulation, including five transverse fracture gaps (0, 1, 2, 3 and 4 mm) with and without the presence of an intramedullary nailing (IN). The results showed a correlation between IRC and SPL and these with the size of the fracture and the echoes of the evaluated interfaces, while FSIR helped to identify the presence of IN in combination with other parameters. The simulations followed the trend of the experimental results. It was concluded that the evaluated parameters contributed to the mechanical characterization of the phantom bone conditions evaluated, and points to the achievement of future experiments that include other frequency of ultrasound for analysis of backscatter.

CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retrac-... more CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retrac-tions are important events that deserve scientific investigation. This study aimed to characterize cases of retraction within general and internal medicine in a high-profile database, with interest in the country of origin of the article and the impact factor (IF) of the journal in which the retraction was made. DESIGN AND SETTING: This study consisted of reviewing retraction notes in the Thomson-Reuters Web of Knowledge (WoK) indexing database, within general and internal medicine. METHODS: The retractions were classified as plagiarism/duplication, error, fraud and authorship problems and then aggregated into two categories: " plagiarism/duplication " and " others. " The countries of origin of the articles were dichotomized according to the median of the indicator " citations per paper " (CPP), and the IF was dichotomized according to its median within general and internal medicine, also obtained from the WoK database. These variables were analyzed using contingency tables according to CPP (high versus low), IF (high versus low) and period (1992-2002 versus 2003-2014). The relative risk (RR) and 95% confidence interval (CI) were estimated for plagiarism/duplication. RESULTS: A total of 86 retraction notes were identified, and retraction reasons were found for 80 of them. The probability that plagiarism/duplication was the reason for retraction was more than three times higher for the low CPP group (RR: 3.4; 95% CI: [1.9-6.2]), and similar results were seen for the IF analysis. CONCLUSION: The study identified greater incidence of plagiarism/duplication among retractions from countries with lower scientific impact.

Proceedings of Meetings on Acoustics, 2013

Biomedical Physics & Engineering Express, Aug 11, 2021

The quantitative ultrasound technique was used to evaluate bone-mimicking phantoms; however, thes... more The quantitative ultrasound technique was used to evaluate bone-mimicking phantoms; however, these phantoms do not mimic the intermediate stages of cortical bone healing. We propose using windshield glass as an original material to produce phantoms that mimic the characteristics of three different stages of cortical bone healing. This material was processed via a route that included breaking, grinding, compacting, drying, and sintering in four temperature groups: 625 °C, 645 °C, 657 °C, and 663 °C. The parameters evaluated were the ultrasonic longitudinal phase velocity ( cL ), corrected ( αc ) ultrasonic attenuation coefficient, and bulk density ( ρs ). The results showed that the mean values of cL, αc, and ρs varied from 2, 398 to 4, 406 m·s−1, 3 to 10 dB·cm−1, and 1, 563 to 2, 089 kg·m−3, respectively. The phantoms exhibited properties comparable with the three stages of cortical bone healing and can be employed in diagnostic and therapeutic studies using ultrasound.

Sao Paulo Medical Journal, 2015

CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retract... more CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retractions are important events that deserve scientific investigation. This study aimed to characterize cases of retraction within general and internal medicine in a high-profile database, with interest in the country of origin of the article and the impact factor (IF) of the journal in which the retraction was made. DESIGN AND SETTING: This study consisted of reviewing retraction notes in the Thomson-Reuters Web of Knowledge (WoK) indexing database, within general and internal medicine. METHODS: The retractions were classified as plagiarism/duplication, error, fraud and authorship problems and then aggregated into two categories: "plagiarism/duplication" and "others." The countries of origin of the articles were dichotomized according to the median of the indicator "citations per paper" (CPP), and the IF was dichotomized according to its median within general and...

Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability ... more Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability to stimulate the consolidation process for normal or pathological fracture. However, the action mechanisms of ultrasound, as well as its propagation modes in bone, are still not completely understood. This study evaluated the parameters Integrated Reflection Coefficient (IRC), the Frequency Slope Integrated Reflection (FSIR) and Sound Pressure Level (SPL) through a pulse-echo propagation in a phantom of cortical bone and through 2D computational simulation, including five transverse fracture gaps (0, 1, 2, 3 and 4 mm) with and without the presence of an intramedullary nailing (IN). The results showed a correlation between IRC and SPL and these with the size of the fracture and the echoes of the evaluated interfaces, while FSIR helped to identify the presence of IN in combination with other parameters. The simulations followed the trend of the experimental results. It was concluded that t...

Tecnicas manuais para a avaliacao do tonus muscular sao de uso comum na pratica clinica para aval... more Tecnicas manuais para a avaliacao do tonus muscular sao de uso comum na pratica clinica para avaliacao da espasticidade. Os dinamometros isocineticos, porem, utilizam um motor e uma celula de carga, fornecendo a respectiva medida de torque necessaria para a geracao do movimento articular. O objetivo do estudo foi descrever o desenvolvimento e testar um Sistema Isocinetico de Quantificacao Mecânica para Pequenos Animais (SQMA), por meio da mobilizacao do tornozelo de 6 ratos femeas Wistar. Valores do coeficiente de elasticidade (K) foram obtidos utilizando-se o modelo massa-mola-amortecedor. O equipamento foi capaz de detectar a caracteristica deslocamento-dependente do tonus de ratos saudaveis, constatada por coeficientes de elasticidade (K) de cerca de 3•10-3 N•m/°. O trabalho mostrou que o primeiro prototipo do SQMA, tambem pode vir a ser utilizado para a quantificacao da espasticidade, com base nos valores dos coeficientes de elasticidade (K) obtidos.

A artrite reumatoide (AR) e uma doenca reumatica, inflamatoria, sistemica, cronica, de etiologia ... more A artrite reumatoide (AR) e uma doenca reumatica, inflamatoria, sistemica, cronica, de etiologia desconhecida e que acomete grandes e pequenas articulacoes, podendo levar a incapacidade funcional, sendo de maior prevalencia no sexo feminino. Alem do uso de farmacos, o tratamento da AR engloba diversas modalidades terapeuticas. O objetivo deste trabalho foi avaliar a frequencia de utilizacao de alguns recursos terapeuticos em uma paciente com AR do adulto e sua relacao com as queixas relatadas durante o periodo de tratamento fisioterapeutico. Este e um estudo longitudinal, retrospectivo e descritivo englobando o periodo de dois anos. Concluiu-se que os exercicios terapeuticos de fortalecimento muscular e resistencia aerobia estiveram associados com a reducao do quadro algico, bem como com a melhora da auto-estima e facilidade para a realizacao de atividades diarias.

nesc.ufrj.br

Resumo O objetivo do presente trabalho foi analisar a comparabilidade de Fatores de Impacto (FIs)... more Resumo O objetivo do presente trabalho foi analisar a comparabilidade de Fatores de Impacto (FIs) de revistas científicas a partir de três bancos de dados: o ISI Thompson (Web of Science), o Scopus ea Scielo, ano-base 2006. Para tal, a faixa de variação dos FIs em ...

Biomedical Physics & Engineering Express

Theoretical Issues in Ergonomics Science

Journal of Therapeutic Ultrasound, 2016

Background: Low-intensity physiotherapeutic ultrasound has been used in physical therapy clinics;... more Background: Low-intensity physiotherapeutic ultrasound has been used in physical therapy clinics; however, there remain some scientific issues regarding the bone-healing process. The objective of this study was to investigate the influence of low-intensity physiotherapeutic ultrasound on the initial stage of bone healing in rats. Methods: Twenty-two male adult rats were assessed quantitatively and qualitatively using radiographic, biochemical, and histological analyses. Numerical simulations were also performed. Fractures in animals in the ultrasound group (n = 11) were treated with low-intensity ultrasound (pulsed mode, duty cycle 20 %) for 10 min daily at an intensity of 40 mW/cm 2 SATA (1.0 MHz) for 10 days. Fractures in animals in the control group (n = 11) were not treated. Results: Alkaline phosphatase levels were non-significantly higher in the ultrasound group than in the control group in the time intervals considered (t(13) = 0.440; 95 % confidence interval (CI) −13.79 to 20.82; p = 0.67). Between-group serum calcium levels were also not significantly different (t(13) = −0.842; 95 % CI −0.48 to 0.21; p = 0.42). Finally, there were no significant differences in radiological scores between the two groups (U = 118; 95 % CI −1.99 to 1.99; p = 0.72). However, the diameter of the newly formed bone tissue was greater and more evident in the ultrasound group. Conclusions: Thirteen days after fracture, there was no significant between-group differences in bone-healing processes, although the increased alkaline phosphatase levels and diameter of new bone tissue need to be further investigated.

Research Integrity and Peer Review, 2016

Conferences were established as global forums for discussion of ideas, policies and empirical fin... more Conferences were established as global forums for discussion of ideas, policies and empirical findings related to the responsible conduct of research. The Conferences aim to galvanise the global effort to strengthen the trustworthiness and reliability of research and encourage researchers worldwide to be accountable for their findings. Earlier conferences were held in Lisbon (2007), Singapore (2010) and Montréal (2010). The Rio conference attracted over 470 delegates from 42 countries, including leaders of research institutions and funding agencies, policy makers, editors and publishers, legal experts, researchers and graduate students. The theme of the conference was Research Rewards and Integrity: Improving Systems to Promote Responsible Research. These Proceedings contain the abstracts of the presentations given at the 4th World Conference in concurrent sessions, partner symposia, and poster sessions. Also included are summaries of the discussions in three focus tracks, which allowed delegates to consider and work on questions about the roles of funders, institutions, and countries in improving research systems and strengthening research integrity. Videos of the plenary presentations are available at the conference website (www.wcri2015.org).

Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the r... more Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the release of inflammatory mediators and subsequent bone formation. The reamed intramedullary nailing (with the same diameter of the medullary cavity) is a surgical procedure widely used in Medicine. The aim of this work was to study ultrasound propagation inside fractures with and without reamed intramedullary nailing using 2D simulations. It was used a custom-made simulation code applied to numerical models (a 4-mm thick cortical plate, a medullary cavity with radius 4 mm with and without reamed nailing, and fracture gaps varying from 1 to 3 mm). A 1-MHz emitter was positioned above fracture center and fourteen receptor transducers were uniformly placed inside fracture gap. The acquired signals were used to estimate the time-of-flight of the first arriving signal (TOF) and the energy amplitude by means of the root mean square (RMS). TOF was slightly influenced by fracture gap variations. It was observed an increase in RMS values with the presence of metal nailing, due to the reflection in the interface water-metal. The receptors placed near cortical plates received more energy (constructive interference between the direct and lateral waves). For the case of reamed nailing, ultrasound stimulation may be intensified.

Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the r... more Low-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the release of inflammatory mediators and subsequent bone formation. The reamed intramedullary nailing (with the same diameter of the medullary cavity) is a surgical procedure widely used in Medicine. The aim of this work was to study ultrasound propagation inside fractures with and without reamed intramedullary nailing using 2D simulations. It was used a custom-made simulation code applied to numerical models (a 4-mm thick cortical plate, a medullary cavity with radius 4 mm with and without reamed nailing, and fracture gaps varying from 1 to 3 mm). A 1-MHz emitter was positioned above fracture center and fourteen receptor transducers were uniformly placed inside fracture gap. The acquired signals were used to estimate the time-of-flight of the first arriving signal (TOF) and the energy amplitude by means of the root mean square (RMS). TOF was slightly influenced by fracture gap variations. It was observed an increase in RMS values with the presence of metal nailing, due to the reflection in the interface water-metal. The receptors placed near cortical plates received more energy (constructive interference between the direct and lateral waves). For the case of reamed nailing, ultrasound stimulation may be intensified.

Littera Docente Discente Em Revista, Jun 7, 2013

A artrite reumatóide (AR) é uma doença reumática, inflamatória, sistêmica, crônica, de etiologia ... more A artrite reumatóide (AR) é uma doença reumática, inflamatória, sistêmica, crônica, de etiologia desconhecida e que acomete grandes e pequenas articulações, podendo levar à incapacidade funcional, sendo de maior prevalência no sexo feminino. Além do uso de fármacos, o tratamento da AR engloba diversas modalidades terapêuticas. O objetivo deste trabalho foi avaliar a frequência de utilização de alguns recursos terapêuticos em uma paciente com AR do adulto e sua relação com as queixas relatadas durante o período de tratamento fisioterapêutico. Este é um estudo longitudinal, retrospectivo e descritivo englobando o período de dois anos. Concluiu-se que os exercícios terapêuticos de fortalecimento muscular e resistência aeróbia estiveram associados com a redução do quadro álgico, bem como com a melhora da auto-estima e facilidade para a realização de atividades diárias.

Littera Docente Discente Em Revista, Dec 13, 2013

Técnicas manuais para a avaliação do tônus muscular são de uso comum na prática clínica para aval... more Técnicas manuais para a avaliação do tônus muscular são de uso comum na prática clínica para avaliação da espasticidade. Os dinamômetros isocinéticos, porém, utilizam um motor e uma célula de carga, fornecendo a respectiva medida de torque necessária para a geração do movimento articular. O objetivo do estudo foi descrever o desenvolvimento e testar um Sistema Isocinético de Quantificação Mecânica para Pequenos Animais (SQMA), por meio da mobilização do tornozelo de 6 ratos fêmeas Wistar. Valores do coeficiente de elasticidade (K) foram obtidos utilizando-se o modelo massa-mola-amortecedor. O equipamento foi capaz de detectar a característica deslocamento-dependente do tônus de ratos saudáveis, constatada por coeficientes de elasticidade (K) de cerca de 3·10 -3 N·m/°. O trabalho mostrou que o primeiro protótipo do SQMA, também pode vir a ser utilizado para a quantificação da espasticidade, com base nos valores dos coeficientes de elasticidade (K) obtidos.

Science and Engineering Ethics, 2015

This study focuses on retraction notices from two major Latin American/Caribbean indexing databas... more This study focuses on retraction notices from two major Latin American/Caribbean indexing databases: SciELO and LILACS. SciELO includes open scientific journals published mostly in Latin America/the Caribbean, from which 10 % are also indexed by Thomson Reuters Web of Knowledge Journal of Citation Reports (JCR). LILACS has a similar geographical coverage and includes dissertations and conference/symposia proceedings, but it is limited to publications in the health sciences. A search for retraction notices was performed in these two databases using the keywords "retracted", "retraction" "withdrawal", "withdrawn", "removed" and "redress". Documents were manually checked to identify those that actually referred to retractions, which were then analyzed and categorized according to the reasons alleged in the notices. Dates of publication/retraction and time to retraction were also recorded. Searching procedures were performed between June and December 2014. Thirty-one retraction notices were identified, fifteen of which were in JCR-indexed journals. "Plagiarism" was alleged in six retractions of this group. Among the non-JCR journals, retraction reasons were alleged in fourteen cases, twelve of which were attributed to "plagiarism". The proportion of retracted articles for the SciELO database was approximately 0.005 %. The reasons alleged in retraction notices may be used as signposts to inform discussions in Latin America on plagiarism and research integrity. At the international level, these results suggest that the correction of the literature is becoming global and is not limited to mainstream international publications.

Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability ... more Studies on ultrasound (US) propagation in bone tissue have been conducted in view of its ability to stimulate the consolidation process for normal or pathological fracture. However, the action mechanisms of ultrasound, as well as its propagation modes in bone, are still not completely understood. This study evaluated the parameters Integrated Reflection Coefficient (IRC), the Frequency Slope Integrated Reflection (FSIR) and Sound Pressure Level (SPL) through a pulse-echo propagation in a phantom of cortical bone and through 2D computational simulation, including five transverse fracture gaps (0, 1, 2, 3 and 4 mm) with and without the presence of an intramedullary nailing (IN). The results showed a correlation between IRC and SPL and these with the size of the fracture and the echoes of the evaluated interfaces, while FSIR helped to identify the presence of IN in combination with other parameters. The simulations followed the trend of the experimental results. It was concluded that the evaluated parameters contributed to the mechanical characterization of the phantom bone conditions evaluated, and points to the achievement of future experiments that include other frequency of ultrasound for analysis of backscatter.

CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retrac-... more CONTEXT AND OBJECTIVE: Increased frequency of retractions has recently been observed, and retrac-tions are important events that deserve scientific investigation. This study aimed to characterize cases of retraction within general and internal medicine in a high-profile database, with interest in the country of origin of the article and the impact factor (IF) of the journal in which the retraction was made. DESIGN AND SETTING: This study consisted of reviewing retraction notes in the Thomson-Reuters Web of Knowledge (WoK) indexing database, within general and internal medicine. METHODS: The retractions were classified as plagiarism/duplication, error, fraud and authorship problems and then aggregated into two categories: " plagiarism/duplication " and " others. " The countries of origin of the articles were dichotomized according to the median of the indicator " citations per paper " (CPP), and the IF was dichotomized according to its median within general and internal medicine, also obtained from the WoK database. These variables were analyzed using contingency tables according to CPP (high versus low), IF (high versus low) and period (1992-2002 versus 2003-2014). The relative risk (RR) and 95% confidence interval (CI) were estimated for plagiarism/duplication. RESULTS: A total of 86 retraction notes were identified, and retraction reasons were found for 80 of them. The probability that plagiarism/duplication was the reason for retraction was more than three times higher for the low CPP group (RR: 3.4; 95% CI: [1.9-6.2]), and similar results were seen for the IF analysis. CONCLUSION: The study identified greater incidence of plagiarism/duplication among retractions from countries with lower scientific impact.