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1.
Radiol Bras ; 53(6): 366-374, 2020.
Article in English | MEDLINE | ID: mdl-33304003

ABSTRACT

OBJECTIVE: To evaluate the effect of acromial inferolateral tilt on subacromial impingement syndrome. MATERIALS AND METHODS: The acromial inferolateral tilt was retrospectively quantified by two researchers on 346 shoulder magnetic resonance images using the glenoacromial (between the inferior proximal acromial surface and the glenoidal face) and acromioclavicular (between the axis of the proximal acromion and distal clavicle) angles. RESULTS: The glenoacromial angle was associated with subacromial impingement syndrome (p < 0.001) and complete supraspinatus tendon rupture (p < 0.001), and the acromioclavicular angle was associated with partial or complete supraspinatus tendon rupture (p = 0.003). The area under the receiver operating characteristic curve (AUC), best cut-off angle, and odds ratio (OR) of the glenoacromial angle for impingement syndrome were 0.579 (95% confidence interval [CI]: 0.508-0.649; p = 0.032), 72°, and 2.1 (95% CI: 1.136-4.053), respectively. For complete supraspinatus tendon rupture, the AUC, best cut-off angle, and OR of the glenoacromial angle were 0.731 (95% CI: 0.626-0.837; p = 0.001), 69°, and 8.496 (95% CI: 2.883-28.33), respectively. For partial or complete supraspinatus tendon rupture, the AUC, best cut-off angle and OR of the acromioclavicular angle were 0.617 (95% CI: 0.539-0.694; p = 0.002), 17°, and 3.288 (95% CI: 1.886-5.768), respectively. Interobserver agreement found for the glenoacromial and acromioclavicular angles were 0.737 (95% CI: 0.676-0.787; p < 0.001) and 0.507 (95% CI: 0.391-0.601; p = 0.001), respectively. CONCLUSION: Inferolateral acromial tilt may have some impact on subacromial impingement syndrome; however, the best quantification method identified (glenoacromial angle) showed a moderate interobserver agreement and a fair performance to assess the risk of complete supraspinatus tendon rupture.


OBJETIVO: Avaliar a contribuição da inclinação inferolateral do acrômio na síndrome do impacto subacromial. MATERIAIS E MÉTODOS: A inclinação inferolateral do acrômio foi quantificada retrospectivamente por dois pesquisadores em 346 ressonâncias magnéticas de ombro por meio dos ângulos glenoacromial (entre a superfície inferior proximal do acrômio e a face glenoidal no plano coronal) e acromioclavicular (entre o eixo do acrômio proximal e o eixo da clavícula distal no plano coronal). RESULTADOS: Houve associação entre ângulo glenoacromial e síndrome do impacto subacromial (p < 0,001) e ruptura completa do tendão supraespinal (p < 0,001). Ângulo acromioclavicular associou-se a ruptura parcial ou completa do tendão supraespinal (p = 0,003). A área sob a curva (area under the curve - AUC) característica de operação do receptor, o melhor ângulo de corte e a razão de chances (odds ratio - OR) do ângulo glenoacromial para a síndrome do impacto foram, respectivamente: 0,579 (intervalo de confiança [IC] 95%: 0,508-0,649; p = 0,032), 72° e 2,1 (IC 95%: 1,136-4,053). Para ruptura completa do tendão supraespinal, a AUC, o melhor ângulo de corte e a OR do ângulo glenoacromial foram, respectivamente: 0,731 (IC 95%: 0,626-0,837; p = 0.001), 69° e 8,496 (IC 95%: 2,883-28,33). Para ruptura parcial ou completa do tendão supraespinal, a AUC, o melhor ângulo de corte e a OR do ângulo acromioclavicular foram, respectivamente: 0,617 (IC 95%: 0,539-0,694; p = 0,002), 17° e 3,288 (IC 95%: 1,886-5,768). As concordâncias interobservador encontradas para os ângulos glenoacromial e acromioclavicular foram, respectivamente: 0,737 (IC 95%: 0,676-0,787; p < 0,001) e 0,507 (IC 95%: 0,391-0,601; p = 0,001). CONCLUSÃO: Inclinação inferolateral do acrômio pode determinar alguma influência sobre a síndrome do impacto subacromial, entretanto, o melhor método de quantificação identificado (o ângulo glenoacromial) apresentou moderada concordância interobservador e desempenho moderado para estratificar o risco de ruptura completa do tendão supraespinal.

2.
Radiol. bras ; 53(6): 366-374, Nov.-Dec. 2020. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1136111

ABSTRACT

Abstract Objective: To evaluate the effect of acromial inferolateral tilt on subacromial impingement syndrome. Materials and Methods: The acromial inferolateral tilt was retrospectively quantified by two researchers on 346 shoulder magnetic resonance images using the glenoacromial (between the inferior proximal acromial surface and the glenoidal face) and acromioclavicular (between the axis of the proximal acromion and distal clavicle) angles. Results: The glenoacromial angle was associated with subacromial impingement syndrome (p < 0.001) and complete supraspinatus tendon rupture (p < 0.001), and the acromioclavicular angle was associated with partial or complete supraspinatus tendon rupture (p = 0.003). The area under the receiver operating characteristic curve (AUC), best cut-off angle, and odds ratio (OR) of the glenoacromial angle for impingement syndrome were 0.579 (95% confidence interval [CI]: 0.508-0.649; p = 0.032), 72°, and 2.1 (95% CI: 1.136-4.053), respectively. For complete supraspinatus tendon rupture, the AUC, best cut-off angle, and OR of the glenoacromial angle were 0.731 (95% CI: 0.626-0.837; p = 0.001), 69°, and 8.496 (95% CI: 2.883-28.33), respectively. For partial or complete supraspinatus tendon rupture, the AUC, best cut-off angle and OR of the acromioclavicular angle were 0.617 (95% CI: 0.539-0.694; p = 0.002), 17°, and 3.288 (95% CI: 1.886-5.768), respectively. Interobserver agreement found for the glenoacromial and acromioclavicular angles were 0.737 (95% CI: 0.676-0.787; p < 0.001) and 0.507 (95% CI: 0.391-0.601; p = 0.001), respectively. Conclusion: Inferolateral acromial tilt may have some impact on subacromial impingement syndrome; however, the best quantification method identified (glenoacromial angle) showed a moderate interobserver agreement and a fair performance to assess the risk of complete supraspinatus tendon rupture.


Resumo Objetivo: Avaliar a contribuição da inclinação inferolateral do acrômio na síndrome do impacto subacromial. Materiais e Métodos: A inclinação inferolateral do acrômio foi quantificada retrospectivamente por dois pesquisadores em 346 ressonâncias magnéticas de ombro por meio dos ângulos glenoacromial (entre a superfície inferior proximal do acrômio e a face glenoidal no plano coronal) e acromioclavicular (entre o eixo do acrômio proximal e o eixo da clavícula distal no plano coronal). Resultados: Houve associação entre ângulo glenoacromial e síndrome do impacto subacromial (p < 0,001) e ruptura completa do tendão supraespinal (p < 0,001). Ângulo acromioclavicular associou-se a ruptura parcial ou completa do tendão supraespinal (p = 0,003). A área sob a curva (area under the curve - AUC) característica de operação do receptor, o melhor ângulo de corte e a razão de chances (odds ratio - OR) do ângulo glenoacromial para a síndrome do impacto foram, respectivamente: 0,579 (intervalo de confiança [IC] 95%: 0,508-0,649; p = 0,032), 72° e 2,1 (IC 95%: 1,136-4,053). Para ruptura completa do tendão supraespinal, a AUC, o melhor ângulo de corte e a OR do ângulo glenoacromial foram, respectivamente: 0,731 (IC 95%: 0,626-0,837; p = 0.001), 69° e 8,496 (IC 95%: 2,883-28,33). Para ruptura parcial ou completa do tendão supraespinal, a AUC, o melhor ângulo de corte e a OR do ângulo acromioclavicular foram, respectivamente: 0,617 (IC 95%: 0,539-0,694; p = 0,002), 17° e 3,288 (IC 95%: 1,886-5,768). As concordâncias interobservador encontradas para os ângulos glenoacromial e acromioclavicular foram, respectivamente: 0,737 (IC 95%: 0,676-0,787; p < 0,001) e 0,507 (IC 95%: 0,391-0,601; p = 0,001). Conclusão: Inclinação inferolateral do acrômio pode determinar alguma influência sobre a síndrome do impacto subacromial, entretanto, o melhor método de quantificação identificado (o ângulo glenoacromial) apresentou moderada concordância interobservador e desempenho moderado para estratificar o risco de ruptura completa do tendão supraespinal.

3.
Bull Environ Contam Toxicol ; 103(2): 292-301, 2019 Aug.
Article in English | MEDLINE | ID: mdl-31243473

ABSTRACT

Reservoir sediment can work as both sink and source for contaminants. Once released into the water column, contaminants can be toxic to biota and humans. We investigate potential ecological risk to benthic organisms by metals contamination in six reservoirs in Southeast Brazil. Results of the bioavailable fraction of copper (Cu), chromium (Cr), cadmium (Cd), lead (Pb), zinc (Zn), and iron (Fe) in sediment samples are presented. Considering Cu, Cd, and Zn concentrations, about 6% of the samples exceeded the threshold effect levels of sediment quality guidelines. The comparison to sediment quality guidelines is conservative because we used a moderate metal extraction. Control of contaminant sources in these reservoirs is key because they are sources of water and food. The mixture toxicity assessment showed an increased incidence of toxicity to aquatic organisms showing that mixture toxicity should be taken into account in sediment assessment criteria.


Subject(s)
Environmental Monitoring/methods , Geologic Sediments/chemistry , Metals, Heavy/analysis , Water Pollutants, Chemical/analysis , Aquatic Organisms/drug effects , Biota/drug effects , Brazil , Humans , Risk Assessment , Tropical Climate
4.
Chemosphere ; 215: 753-757, 2019 Jan.
Article in English | MEDLINE | ID: mdl-30347368

ABSTRACT

On November 2015, one of Brazil's most important watersheds was impacted by the mine waste from Fundão dam collapse in Mariana. The mine waste traveled over 600 km along the Doce River before reaching the sea, causing severe devastation along its way. Here we assessed trace element concentrations and cytogenotoxic effects of the released mine waste. Water samples were collected along the Doce River ten days after the disaster in two impacted sites and one non-impacted site. Sampling points were located hundreds of kilometers downstream of the collapsed dam. Water samples were used for trace element quantification and to run an experiment using Allium cepa to test cytogenotoxicity. We found extremely high concentrations of particulate Fe, Al, and Mn in the impacted sites. We observed cytogenotoxic effects such as alterations in mitotic and phase indexes, and enhanced frequency of chromosomal aberrations. Our results indicate interferences in the cell cycle in impacted sites located hundreds of kilometers downstream of the disaster. The environmental impacts of the dam collapse may not only be far-reaching but also very likely long-lasting, because the mine waste may persist in the Doce River sediment for decades.


Subject(s)
Chromosome Aberrations/drug effects , Disasters , Environmental Exposure/adverse effects , Mining , Mitosis/drug effects , Onions/drug effects , Water Pollutants, Chemical/toxicity , Brazil , Environmental Monitoring , Rivers/chemistry , Structure Collapse , Trace Elements/toxicity
5.
Rev. bras. otorrinolaringol ; 74(6): 843-852, nov.-dez. 2008. ilus, tab
Article in English, Portuguese | LILACS | ID: lil-503628

ABSTRACT

A ototoxicidade ainda é um desafio para medicina. A descoberta dos mecanismos endógenos autoprotetores das células ciliadas externas associados a métodos de avaliação funcional e ultra-estrutural das mesmas abriu nova perspectiva no entendimento e controle destes mecanismos. OBJETIVO: O trabalho objetivou determinar se subdoses de gentamicina protegia contra ototoxicidade da amicacina baseado nestes mecanismos e determinar se a amplitude das emissões otoacústicas teria correlação com grau de integridade das células ciliadas. MATERIAL E MÉTODO: Estudo experimental. Utilizando 31 cobaias, administrou-se soro fisiológico, gentamicina e amicacina, isoladamente e associadas, via intramuscular, por 12, 30 e 42 dias. Pesquisa de emissões otoacústicas foi realizada no início e final do experimento, comparado com estudo da integridade coclear, por microscopia eletrônica. RESULTADOS: Subdoses de gentamicina não protegeram a orelha interna contra toxicidade da amicacina; diminuições da amplitude das emissões otoacústicas apresentaram forte correlação com aumento de lesões das células ciliadas. CONCLUSÃO: Os achados contribuem para o entendimento dos mecanismos de ototoxicidade e otoproteção da orelha interna. A determinação da correlação entre amplitude de emissões e integridade celular tem grande importância no acompanhamento das lesões de células ciliadas, com possível aplicação no monitoramento de ototoxicidade por drogas em humanos.


Ototoxicity is still a challenge to medicine. The discovery of self-protecting endogenous mechanisms of the outer hair cells associated with their functional and ultra-structural assessment methods has opened new horizons in the understanding and controlling of these mechanisms. AIM: this paper aimed at establishing whether or not underdoses of gentamicin could protect the inner ear against the harmful effects of amikacin, based on these protection mechanisms and determine if the otoacoustic emission amplitudes could be associated with the level of hair cell integrity. MATERIALS AND METHODS: Experimental study. We used 31 guinea pigs. They were injected with saline solution, gentamicin and amikacin, alone and in combinations -intramuscular injections - during 12, 30 and 42 days. The otoacoustic emissions were recorded in the beginning and at the end of the experiment, comparing it with the cochlear integrity study carried out by electron microscopy. RESULTS: gentamicin underdoses did not protect the inner ear against amikacin toxicity; the reduction in otoacoustic emissions was strongly associated with an increase in hair cell lesions. CONCLUSION: these findings help understand inner ear otoprotection and ototoxicity. Establishing the correlation between the emissions amplitude an cell integrity plays an important role in the follow up of hair cell damage, with possible monitoring of ototoxicity caused by drugs in humans.


Subject(s)
Animals , Guinea Pigs , Male , Amikacin/adverse effects , Anti-Bacterial Agents/adverse effects , Ear, Inner/drug effects , Gentamicins/therapeutic use , Hair Cells, Auditory, Inner/drug effects , Dose-Response Relationship, Drug , Ear, Inner/ultrastructure , Gentamicins/administration & dosage , Hair Cells, Auditory, Inner/ultrastructure , Microscopy, Electron, Scanning , Otoacoustic Emissions, Spontaneous/drug effects
6.
Braz J Otorhinolaryngol ; 74(6): 843-852, 2008.
Article in English | MEDLINE | ID: mdl-19582340

ABSTRACT

UNLABELLED: Ototoxicity is still a challenge to medicine. The discovery of self-protecting endogenous mechanisms of the outer hair cells associated with their functional and ultra-structural assessment methods has opened new horizons in the understanding and controlling of these mechanisms. AIM: this paper aimed at establishing whether or not underdoses of gentamicin could protect the inner ear against the harmful effects of amikacin, based on these protection mechanisms and determine if the otoacoustic emission amplitudes could be associated with the level of hair cell integrity. MATERIALS AND METHODS: Experimental study. We used 31 guinea pigs. They were injected with saline solution, gentamicin and amikacin, alone and in combinations -intramuscular injections - during 12, 30 and 42 days. The otoacoustic emissions were recorded in the beginning and at the end of the experiment, comparing it with the cochlear integrity study carried out by electron microscopy. RESULTS: gentamicin underdoses did not protect the inner ear against amikacin toxicity; the reduction in otoacoustic emissions was strongly associated with an increase in hair cell lesions. CONCLUSION: these findings help understand inner ear otoprotection and ototoxicity. Establishing the correlation between the emissions amplitude an cell integrity plays an important role in the follow up of hair cell damage, with possible monitoring of ototoxicity caused by drugs in humans.


Subject(s)
Amikacin/adverse effects , Anti-Bacterial Agents/adverse effects , Ear, Inner/drug effects , Gentamicins/therapeutic use , Hair Cells, Auditory, Inner/drug effects , Animals , Dose-Response Relationship, Drug , Ear, Inner/ultrastructure , Gentamicins/administration & dosage , Guinea Pigs , Hair Cells, Auditory, Inner/ultrastructure , Male , Microscopy, Electron, Scanning , Otoacoustic Emissions, Spontaneous/drug effects
7.
Arq. bras. psicol. (Rio J. 1979) ; 52(2): 93-105, abr.-jun. 2000.
Article in Portuguese | Index Psychology - journals | ID: psi-15204

ABSTRACT

Respostas auditivas de tronco cerebral foram obtidas de 112 recém-nascidos, sendo 36 normais, testados entre o sétimo e décimo dias de vida e 76 recém-nascidos que estiveram internados em uma Unidade Neonatal de Cuidados Intensivos, com a finalidade de identificar a incidência do comprometimento auditivo durante o acompanhamento. Os recém-nascidos de alto risco foram selecionados para o exame com base nos critérios de risco recomendados pela Academia Americana de Pediatria - 'Joint Committee of Infant Hearing'. Os 76 recém-nascidos de alto risco foram divididos em dois grupos: o primeiro com idade pós-concepcional media de 38.8 semanas na data do teste e o segundo com idade pós-concepcional media de 47.7 semanas na data do teste. A latência das ondas I e o intervalo I-V foram medidos a 80 dB HL e a latência da onda V foi medida a 80, 60, 40 e 20 dB HL, para o grupo de alto risco as medidas das latências da onda V foram obtidas com cliques de 60 e 40 dB HL. Dentre os 76 recém-nascidos de alto risco, 69 tiveram um acompanhamento adequado. Vinte crianças mostraram alterações no teste eletrofisiológico. Destas, sete apresentaram normalização dos traçados no acompanhamento e 12 confirmaram a anormalidade auditiva. Encontrou-se uma incidência de 7.2 por cento de perdas auditivas neurossensoriais, 7.2 por cento de perdas condutivas e 2.9 por cento de disfunção neurológica (AU)

8.
Rev. bras. med. otorrinolaringol ; 3(6): 286-90, nov. 1996. ilus
Article in Portuguese | LILACS | ID: lil-181474

ABSTRACT

Os abscessos septais nasais sao relativamente raros na clínica atual. As causas mais comuns sao os traumas nasais seguidos de hematoma septal. As complicaçoes intracranianas destes abscessos, hoje, sao pouco comuns e geralmente com resoluçao satisfatória, quando o tratamento adequado é realizado. O presente estudo relata o caso de uma criança de 11 anos, com velamento de células etmoidais bilaterais, que desenvolveu extenso abscesso de septo nasal de origem nao traumática, evoluindo rapidamente para um quadro sintomatológico de meningite, comprovado por exame liquórico. Após avaliaçao na unidade de emergência a criança foi submetida a intervençao cirúrgica, sob anestesia geral, com drenagem do abscesso e antibioticoterapia endovenosa. Evoluiu com resoluçao completa do processo infeccioso, sem deixar sequelas nasais ou neurológicas. A etmoidite, apesar de descrita como causa de abscesso septal, nao pôde ser confirmada como agente etiológico do mesmo, neste caso. Outras causas nao foram encontradas. Os autores enfatizam a necessidade do diagnóstico precoce e tratamento correto dos abscessos septais, qualquer que seja a cuasa, como única forma de se evitar as deformidades estéticas e as complicaçoes intracranianas que, embora raras, podem instalar-se rapidamente e ser fatais.


Subject(s)
Humans , Male , Adolescent , Abscess/complications , Meningitis/etiology , Nasal Septum , Tomography, X-Ray Computed
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