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1.
J Anim Sci ; 2024 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-39046459

RESUMO

Gestating sows are often fed a single diet throughout their gestation cycle, leading to situations of nutrients deficiency or excess at the individual level. The purpose of this study was to characterize, over 3 consecutive cycles, the impact of a precision feeding (PF), i.e. dietary supplies adjusted at individual level in terms of quantity (energy intake) and quality (standardized ileal digestible (SID) lysine (Lys) intake), on gestating sows' productive performance, feeding behavior, environmental outputs and health status compared with sows fed a conventional feeding (CF, i.e. fixed SID Lys intake). At the start of the trial, 2 batches of 20 Landrace × Large White gestating sows were allocated to one of the 2 feeding strategies (PF vs. CF), based on their parity (1, 2 or 3 and more), body weight (BW), and backfat thickness (BT) 3 days after insemination. The PF strategy consisted in mixing with automatic feeders 2 iso-energetic diets (9.8 MJ/kg of net energy with 3.3 and 8.5 g SID Lys / kg, respectively) in variable proportions at individual and daily levels, whereas for the CF strategy these proportions remained constant throughout gestation (73% and 27%, respectively, resulting in a SID Lys concentration of 4.7 g/kg). Sows were followed over 3 consecutive gestations and the sows remained allocated to the same strategy throughout the study. Some sows were culled before the end of the study and were replaced by other sows who therefore performed only 1 or 2 gestations during the study. Thus, 106 gestations and lactations from 51 sows were fully studied and their data analyzed. The PF strategy allowed the sows to reach more closely the expected BT values at farrowing across cycles than the CF strategy (P < 0.001). The PF sows consumed 16% less SID Lys per gestation than the CF sows (P < 0.001), resulting in a 4% improvement in N efficiency (P < 0.001), with no impact on performance at farrowing (P > 0.10). The sows consumed their daily ration in a single visit whatever the feeding strategy (P = 0.41), but CF sows spent more time in the feeder in cycle 2 and 3 (P < 0.001). Thus, compared to the CF strategy implemented by farmers, the individual and daily nutritional supplies implemented with the PF strategy were more efficient in enabling sows to achieve body condition objectives at farrowing over the long-term, also with a reduced SID Lys intake and an improved N efficiency without negative impact on farrowing performances.

2.
Eur J Intern Med ; 2024 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-38880725

RESUMO

BACKGROUND: Eosinophilic granulomatosis with polyangiitis (EGPA), is a rare ANCA-associated systemic vasculitis. Its overlapping features with other vasculitic or eosinophilic diseases, and the wide and heterogeneous range of clinical manifestations, often result in a delay to diagnosis. OBJECTIVE: To identify red flags that raise a suspicion of EGPA to prompt diagnostic testing and to present an evidence-based clinical checklist tool for use in routine clinical practice. METHODS: Systematic literature review and expert consensus to identify a list of red flags based on clinical judgement. GRADE applied to generate a strength of recommendation for each red flag and to develop a checklist tool. RESULTS: 86 studies were included. 40 red flags were identified as relevant to raise a suspicion of EGPA and assessed by the experts as being clinically significant. Experts agreed that a diagnosis of EGPA should be considered in a patient aged ≥6 years with a blood eosinophil level >1000 cells/µL if untreated and >500 cells/µL if previously treated with any medication likely to have altered the blood eosinophil count. The presence of asthma and/or nasal polyposis should reinforce a suspicion of EGPA. Red flags of asthma, lung infiltrates, pericarditis, cardiomyopathy, polyneuropathy, biopsy with inflammatory eosinophilic infiltrates, palpable purpura, digital ischaemia and ANCA positivity, usually anti-myeloperoxidase, among others, were identified. CONCLUSION: The identification of a comprehensive set of red flags could be used to raise a suspicion of EGPA in patients with eosinophilia, providing clinicians with an evidence-based checklist tool that can be integrated into their practice.

3.
Nat Commun ; 13(1): 4945, 2022 08 23.
Artigo em Inglês | MEDLINE | ID: mdl-35999209

RESUMO

Spatial arrangement of distinct Amazonian environments through time and its effect on specialized biota remain poorly known, fueling long-lasting debates about drivers of biotic diversification. We address the late Quaternary sediment deposition that assembled the world's largest seasonally flooded ecosystems. Genome sequencing was used to reconstruct the demographic history of bird species specialized in either early successional vegetation or mature floodplain forests. Sediment deposition that built seasonally flooded habitats accelerated throughout the Holocene (last 11,700 years) under sea level highstand and intensification of the South American Monsoon, at the same time as global increases in atmospheric methane concentration. Bird populations adapted to seasonally flooded habitats expanded due to enlargement of Amazonian river floodplains and archipelagos. Our findings suggest that the diversification of the biota specialized in seasonally flooded habitats is coupled to sedimentary budget changes of large rivers, which rely on combined effects of sea level and rainfall variations.


Assuntos
Ecossistema , Inundações , Animais , Aves , Florestas , Rios
4.
Braz. j. biol ; 76(4): 864-870, Oct.-Dec. 2016. tab, graf
Artigo em Inglês | LILACS | ID: biblio-828083

RESUMO

Abstract We tested the hypothesis of a negative relationship between vegetation characteristics and ant species richness in a Brazilian open vegetation habitat, called candeial. We set up arboreal pitfalls to sample arboreal ants and measured the following environmental variables, which were used as surrogate of environmental heterogeneity: tree richness, tree density, tree height, circumference at the base of the plants, and canopy cover. Only canopy cover had a negative effect on the arboreal ant species richness. Vegetation characteristics and plant species composition are probably homogeneous in candeial, which explains the lack of relationship between other environmental variables and ant richness. Open vegetation habitats harbor a large number of opportunistic and generalist species, besides specialist ants from habitats with high temperatures. An increase in canopy cover decreases sunlight incidence and may cause local microclimatic differences, which negatively affect the species richness of specialist ants from open areas. Canopy cover regulates the richness of arboreal ants in open areas, since only few ant species are able to colonize sites with dense vegetation; most species are present in sites with high temperature and luminosity. Within open vegetation habitats the relationship between vegetation characteristics and species richness seems to be the opposite from closed vegetation areas, like forests.


Resumo Nós testamos a hipótese de que há uma relação negativa entre as características da vegetação e a riqueza de espécies de formigas em habitats abertos como o candeial. Para isto, nós instalamos pitfalls arborícolas para a captura de formigas e mensuramos as seguintes variáveis ambientais: riqueza de árvores, densidade de árvores, altura de árvores, circunferência basal das plantas e cobertura de dossel. Somente a cobertura de dossel apresentou efeito negativo na riqueza de formigas arborícolas. Provavelmente, as características da vegetação e a composição de espécies de plantas são mais homogêneas no candeial, o que explica a ausência de relação entre a riqueza de formigas e as outras variáveis ambientais. Formações abertas abrigam um grande número de espécies oportunistas e generalistas, além de formigas especialistas de climas quentes. O aumento na cobertura de dossel diminui a incidência solar o que pode causar diferenças microclimáticas que afetam negativamente as espécies de formigas especialistas de hábitats abertos. A cobertura de dossel regula a riqueza de espécies de formigas arborícolas em áreas abertas e poucas espécies nestes locais estão aptas a colonizar locais com a vegetação densa. Assim, a maioria das espécies estão presentes em locais com alta temperatura e luminosidade. Em outras palavras, em hábitats de vegetação aberta a relação entre características da vegetação e a riqueza de espécies pode ser oposta em comparação ao que é encontrado em áreas que apresentam a vegetação mais fechada, como florestas.


Assuntos
Animais , Formigas/classificação , Árvores/fisiologia , Ecossistema , Formigas/fisiologia , Plantas , Clima Tropical , Brasil , Florestas , Folhas de Planta , Biodiversidade
5.
Braz J Biol ; 76(4): 864-870, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27143066

RESUMO

We tested the hypothesis of a negative relationship between vegetation characteristics and ant species richness in a Brazilian open vegetation habitat, called candeial. We set up arboreal pitfalls to sample arboreal ants and measured the following environmental variables, which were used as surrogate of environmental heterogeneity: tree richness, tree density, tree height, circumference at the base of the plants, and canopy cover. Only canopy cover had a negative effect on the arboreal ant species richness. Vegetation characteristics and plant species composition are probably homogeneous in candeial, which explains the lack of relationship between other environmental variables and ant richness. Open vegetation habitats harbor a large number of opportunistic and generalist species, besides specialist ants from habitats with high temperatures. An increase in canopy cover decreases sunlight incidence and may cause local microclimatic differences, which negatively affect the species richness of specialist ants from open areas. Canopy cover regulates the richness of arboreal ants in open areas, since only few ant species are able to colonize sites with dense vegetation; most species are present in sites with high temperature and luminosity. Within open vegetation habitats the relationship between vegetation characteristics and species richness seems to be the opposite from closed vegetation areas, like forests.


Assuntos
Formigas/classificação , Ecossistema , Árvores , Animais , Formigas/fisiologia , Biodiversidade , Brasil , Florestas , Folhas de Planta , Plantas , Árvores/fisiologia , Clima Tropical
6.
Eur J Vasc Endovasc Surg ; 51(4): 572-8, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26905471

RESUMO

OBJECTIVE: In patients with claudication, an ankle brachial index (ABI) under 0.90 is considered to be abnormal and a sufficient argument for the arterial origin of exercise induced pain. Exercise transcutaneous oxygen pressure (Ex-tcpO2) can provide evidence of exercise induced regional blood flow impairment (RBFI) and confirm the arterial origin of walking induced pain. The frequency with which calf Ex-tcpO2 remains apparently normal in patients with claudication and abnormal ABI is unknown. Causes of these discrepant results have yet to be analysed. METHODS: A retrospective analysis of 4575 Ex-tcpO2 tests performed on 3,281 patients was conducted. The focus was on patients with a history of calf claudication and ABI under 0.90. Duplicate or non-standard tests were excluded, as were patients with no pain or those able to walk more than 15 minutes (on a treadmill). Searches were conducted for possible explanations of normal calf Ex-tcpO2 in the selected patients. RESULTS: Cardiorespiratory limitation was identified in 50 patients and isolated non-calf ischemia in 36 of the 106 patients selected. There was no obvious explanation during Ex-tcpO2, but clinical improvement after non-vascular treatment or total absence of improvement after a technically successful revascularisation was noted in 12 patients. Four patients were lost on follow up. Four patients improved after revascularisation, which suggests that the Ex-tcpO2 result was false negative. CONCLUSIONS: Ex-tcpO2 is negative in more than 20% of tests performed in patients with an ABI under 0.90 and a history of calf claudication. In most cases, when excluding re-tests and non-limiting or non-calf claudication on the treadmill, non-calf ischemia or a non-vascular limitation occurring during the test were observed. This observation supports both the value of treadmill testing in patients with calf claudication assumed to be of arterial origin (ABI<0.90) and the use of Ex-tcpO2 to detect non-calf ischemia.


Assuntos
Índice Tornozelo-Braço , Monitorização Transcutânea dos Gases Sanguíneos , Teste de Esforço , Claudicação Intermitente/diagnóstico , Perna (Membro)/irrigação sanguínea , Doença Arterial Periférica/diagnóstico , Idoso , Tolerância ao Exercício , Feminino , França/epidemiologia , Humanos , Claudicação Intermitente/epidemiologia , Claudicação Intermitente/fisiopatologia , Masculino , Pessoa de Meia-Idade , Doença Arterial Periférica/epidemiologia , Doença Arterial Periférica/fisiopatologia , Valor Preditivo dos Testes , Prevalência , Fluxo Sanguíneo Regional , Estudos Retrospectivos , Fatores de Tempo , Caminhada
7.
Eur J Vasc Endovasc Surg ; 50(5): 623-9, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26319478

RESUMO

OBJECTIVE: In patients with peripheral artery disease (PAD), the different distances between stops and the stop durations recorded with Global Positioning System (GPS) during a 1 hour stroll in the community are highly variable. Nevertheless, the reliability of the greatest community walk distance (greatest distance), the average of walking speeds (average speed) and the durations of stops (average stop durations) have not been studied. DESIGN: Seventeen PAD patients performed two series of evaluations (T1 and T2) within a 1 month period. METHODS: Each series included: a 1 hour stroll in the community with the calculation of the walking impairment questionnaire (WIQ) scores, the measurement of maximal walking distance on a treadmill (MWD on treadmill) and a 1 hour stroll in the community with GPS. The Garmin GPS-60 (Garmin Ltd, Olathe, Kan) receiver was used for all patients. Test-retest reliability of MWD on treadmill, WIQ, and GPS parameters were assessed with intraclass coefficient of correlation (ICC). RESULTS: ICCs are almost perfect between T1 and T2 for greatest distance (ICC = 0.911), average speed (ICC = 0.905), and MWD on treadmill (ICC = 0.992), and substantial for the average WIQ (ICC = 0.794). Correlation of average stop durations was considered substantial (ICC = 0.691). CONCLUSIONS: Despite the previously reported "within stroll" variability of walking bouts for distances, speeds, and stop durations, GPS derived greatest distance and average speed are reliable in PAD patients in test-retest experiments. The GPS appears to be a new tool to assess walking limitation and allows objective clinical investigation.


Assuntos
Teste de Esforço , Sistemas de Informação Geográfica , Claudicação Intermitente/fisiopatologia , Doença Arterial Periférica/fisiopatologia , Caminhada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Reprodutibilidade dos Testes , Inquéritos e Questionários
8.
J Thromb Haemost ; 8(1): 68-74, 2010 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-19817998

RESUMO

BACKGROUND: Few studies have examined the clinical course of pulmonary embolism (PE) in patients anticoagulated continuously for 1 year. OBJECTIVE: We sought to determine the incidence of death, recurrent PE and bleeding during anticoagulation in the first year after acute PE, and to assess associated risk factors. METHODS: All consecutive PE patients who were referred to our center in Pisa, Italy between 2001 and 2005 received a conventional initial treatment, followed by vitamin K antagonists [international normalized ratio (INR), 2.0-3.0] for 1 year. They were followed-up at scheduled times at the study center. The development of recurrent PE was objectively documented and recorded. RESULTS: Out of 497 patients, 48 (9.6%) developed recurrent PE, which was fatal in 36. Of these 48 events, 39 occurred within 10 days of diagnosis and only two patients had a non-fatal recurrent PE between 6 and 12 months. Risk factors associated with the risk for overall recurrent PE were persistent severe dyspnoea (P = 0.007), a high perfusion defect score index (PDI) (P = 0.003) and cardiopulmonary co-morbidities (P = 0.005). Unprovoked presentation (P = 0.030), persistent severe dyspnoea (P = 0.011) and a high PDI (P = 0.001) predicted the risk for fatal PE. Overall bleeding incidence was 3.4%, no cases of bleeding occurred between 180 and 360 days post-diagnosis. CONCLUSIONS: In spite of conventional anticoagulation, a proportion of patients with PE experience both a fatal and non-fatal recurrent embolism within the first year. The large majority of these occur within the days proceeding diagnosis, with only a small minority occurring in the last 6 months. No bleeding was observed after 6 months. Therefore, prolonging anticoagulation for 1 year represents both a safe and effective treatment.


Assuntos
Anticoagulantes/administração & dosagem , Embolia Pulmonar/tratamento farmacológico , Idoso , Anticoagulantes/efeitos adversos , Esquema de Medicação , Feminino , Seguimentos , Hemorragia/induzido quimicamente , Humanos , Coeficiente Internacional Normatizado , Itália/epidemiologia , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Estudos Prospectivos , Embolia Pulmonar/sangue , Embolia Pulmonar/mortalidade , Recidiva , Medição de Risco , Fatores de Risco , Fatores de Tempo , Resultado do Tratamento , Vitamina K/antagonistas & inibidores
9.
Rev. panam. infectol ; 10(4): 58-66, oct.-dic. 2008.
Artigo em Espanhol | LILACS | ID: lil-544928

RESUMO

Las helmintiasis intestinales continúan siendo un problema de salud para una gran parte del mundo. La quimioterapia antihelmíntica aplicada en las comunidades logra disminuir la prevalencia e intensidad de estas infecciones; sin embargo, las cifras suelen regresar a valores similares poco tiempo después. Un enfoque integral en la lucha contra los helmintos intestinales con intervenciones que involucren a las comunidades, los sectores y a los decisores de salud ayudará a hacer decrecer la transmisión de los geohelmintos. Una estrategia de comunicación social, donde se tome en consideración a la audiencia, el mensaje que se llevará a esta, la fuente de procedencia del mensaje y el canal por el cual llegará a la audiencia propicia que el público conozca de las amenazas de estas infecciones y que aumente el nivel de percepción y su participación. La presente revisión aborda aspectos relacionados con la importancia de la capacitación de los trabajadores de la salud en comunicación social en salud y en la identificación de los problemas relacionados con el control de las helmintiasis intestinales en su comunidad. El uso de los métodos de comunicación puede influir positivamente en las decisiones individuales y comunitarias para disminuir el impacto de este problema en la salud de las poblaciones.


Assuntos
Humanos , Feminino , Pré-Escolar , Criança , Comunicação em Saúde , Helmintos/patogenicidade , Infecções , Pobreza
10.
Farm Hosp ; 31(5): 270-5, 2007.
Artigo em Espanhol | MEDLINE | ID: mdl-18052629

RESUMO

OBJECTIVE: To know relative dose intensity (RDI) in patients with breast cancer treated with chemotherapy. To determine the number of patients where RDI was < 85% of that programmed and the possible cause. METHOD: Retrospective study, four-month selection period. The following were recorded: age, body surface, protocol applied, intention of treatment, frequency of administration of cycles, number of cytostatic treatments previously received and filgrastim administration. The average RDI per patient and protocol was calculated. RESULTS: 110 patients were analysed, the average age of them being 55.4 years (interval: 31-84), average body surface 1.7 m2 (1.3-2.4). Overall average RDI was 91.0% (SD 10.7). 93.8% (10.6), 95.8% (6.3) and 81.9% (18.5) in neoadjuvant, adjuvant and palliative treatments, respectively. 20% of the patients did not reach a RDI = 85% of that programmed, average RDI 69.5% (3.29). A delay in the administration of chemotherapy equal or greater than seven days occurred in 45.4% of the cases, average RDI 80.7% (16.0). In the episodes where the dose was reduced because of toxicity, the RDI was 75.6% (13.6). Significant inverse ratios were obtained with age (p = 0.02) and line of treatment (p = 0.03) with the RDI. In 36.8%, dose reduction was caused by neutropenia; 52.9% received filgrastim. CONCLUSIONS: Most patients received the appropriate RDI. Age, previous treatments and intention of treatment were the variables with the greatest impact on the dose received. The delay in administering the cycle was the most frequent act minimising the toxicity and which least affected the treatment.


Assuntos
Antineoplásicos/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/administração & dosagem , Relação Dose-Resposta a Droga , Esquema de Medicação , Humanos , Pessoa de Meia-Idade , Estudos Retrospectivos
11.
Braz J Med Biol Res ; 40(2): 265-7, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17273664

RESUMO

It is well established that interleukin-6 (IL-6) is an essential growth factor for multiple myeloma (MM) and patients with increased IL-6 levels have a poor prognosis. In healthy subjects, the presence of the C allele at a polymorphic site (-174 G/C) of the IL-6 gene is related to low IL-6 levels. In view of the potential association of this particular polymorphism with IL-6 concentration, and the relevance of IL-6 in MM pathogenesis, the objective of the present study was to investigate the prevalence of IL-6 (-174 G/C) promoter polymorphism and its association with development of MM in Brazilian individuals. We investigated the prevalence of these alleles in 52 patients and 60 healthy subjects (matched by age, sex, and race) of a Brazilian population. Thirty patients were male (42.4%), 24 (46.2%) were white and the median age at diagnosis was 58.5 years (range: 28 to 84 years). To determine the IL-6 (-174 G/C) polymorphism, molecular analysis was performed by polymerase chain reaction followed by endonuclease restriction digestion. The genotype distributions observed in the group of patients were 4% CC, 42% GC and 54% GG. The C allele frequency was 0.25. These results were similar to the control group, suggesting no impact of this polymorphism on the susceptibility to MM.


Assuntos
Interleucina-6/genética , Mieloma Múltiplo/genética , Polimorfismo Genético , Regiões Promotoras Genéticas/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Alelos , Feminino , Predisposição Genética para Doença , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase
12.
Braz. j. med. biol. res ; 40(2): 265-267, Feb. 2007. tab
Artigo em Inglês | LILACS | ID: lil-440494

RESUMO

It is well established that interleukin-6 (IL-6) is an essential growth factor for multiple myeloma (MM) and patients with increased IL-6 levels have a poor prognosis. In healthy subjects, the presence of the C allele at a polymorphic site (-174 G/C) of the IL-6 gene is related to low IL-6 levels. In view of the potential association of this particular polymorphism with IL-6 concentration, and the relevance of IL-6 in MM pathogenesis, the objective of the present study was to investigate the prevalence of IL-6 (-174 G/C) promoter polymorphism and its association with development of MM in Brazilian individuals. We investigated the prevalence of these alleles in 52 patients and 60 healthy subjects (matched by age, sex, and race) of a Brazilian population. Thirty patients were male (42.4 percent), 24 (46.2 percent) were white and the median age at diagnosis was 58.5 years (range: 28 to 84 years). To determine the IL-6 (-174 G/C) polymorphism, molecular analysis was performed by polymerase chain reaction followed by endonuclease restriction digestion. The genotype distributions observed in the group of patients were 4 percent CC, 42 percent GC and 54 percent GG. The C allele frequency was 0.25. These results were similar to the control group, suggesting no impact of this polymorphism on the susceptibility to MM.


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso de 80 Anos ou mais , /genética , Mieloma Múltiplo/genética , Polimorfismo Genético , Regiões Promotoras Genéticas , Alelos , Predisposição Genética para Doença , Genótipo , Reação em Cadeia da Polimerase
13.
Cell Signal ; 19(2): 269-77, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16963227

RESUMO

Oxidative mechanisms of injury are involved in many neurodegenerative diseases such as stroke, ischemia-reperfusion injury and multiple sclerosis. G protein-coupled receptor kinase 2 (GRK2) plays a key role in G protein-coupled receptor (GPCR) signaling modulation, and its expression levels are decreased after brain hypoxia/ischemia and reperfusion as well as in several inflammatory conditions. We report here that hydrogen peroxide downregulates GRK2 expression in C6 rat glioma cells. The hydrogen peroxide-induced decrease in GRK2 is prevented by a calpain protease inhibitor, but does not involve increased GRK2 degradation or changes in GRK2 mRNA level. Instead we show that hydrogen peroxide treatment impairs GRK2 translation in a process that requires Cdk1 activation and involves the mTOR pathway. This novel mechanism for the control of GRK2 expression in glial cells upon oxidative stress challenge may contribute to the modulation of GPCR signaling in different pathological conditions.


Assuntos
Proteína Quinase CDC2/metabolismo , Calpaína/metabolismo , Peróxido de Hidrogênio/farmacologia , Biossíntese de Proteínas , Quinases de Receptores Adrenérgicos beta/metabolismo , Animais , Linhagem Celular , Relação Dose-Resposta a Droga , Regulação para Baixo , Quinase 2 de Receptor Acoplado a Proteína G , Glioma/metabolismo , Estresse Oxidativo , Proteínas Quinases/metabolismo , Ratos , Transdução de Sinais , Serina-Treonina Quinases TOR
14.
Arch Bronconeumol ; 42(1): 33-8, 2006 Jan.
Artigo em Espanhol | MEDLINE | ID: mdl-16426521

RESUMO

Cystic fibrosis is usually diagnosed based on suspicion arising from a typical clinical picture and must be confirmed by either a finding of high chloride concentrations in sweat tests on 2 separate days or detection of 2 gene mutations. The nasal potential difference (NPD) test has been proposed to provide evidence of abnormal function of the cystic fibrosis transmembrane conductance regulator (CFTR), a receptor that forms a chloride ion channel. The test is especially useful for patients who have normal chloride concentrations in sweat tests and in whom 2 gene mutations related to cystic fibrosis have not been detected. The NPD test requires 2 electrodes connected to a voltmeter (a Tholy-Medicap device). One is placed on the nasal mucosa of the inferior turbinate and the other is placed subcutaneously on the forearm. A reading less than -40 mV is considered abnormal, as values under that cut point are never found in healthy individuals. Two abnormal NPD findings on separate days are required for a diagnosis of CFTR dysfunction. False negatives arise when the integrity of the epithelium is altered. After application of amiloride, NPD decreases more markedly in cystic fibrosis patients than in healthy individuals and applying isoproterenol or fenoterol after amiloride provokes no response in patients with the genetic defect that prevents chloride ion channel activation.


Assuntos
Fibrose Cística/diagnóstico , Fibrose Cística/fisiopatologia , Nariz/fisiologia , Potenciais de Ação , Eletrodos , Eletrofisiologia , Epitélio/fisiologia , Desenho de Equipamento , Humanos
15.
Braz J Med Biol Res ; 38(11): 1609-13, 2005 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-16258629

RESUMO

The biologic basis of the negative prognosis of plasmablastic myeloma is not fully understood. To determine whether histologically aggressive multiple myeloma (MM) is associated with a more angiogenic marrow environment, bone marrow samples from 50 recently diagnosed MM patients were evaluated. Twelve percent (6/50) of patients presented plasmablastic MM, and this feature correlated with moderate/strong intensity of vascular endothelial growth factor staining of plasma cells (P = 0.036). Although plasmablastic MM was not associated with increasing of microvessel density, this new evidence of increased expression of vascular endothelial growth factor on plasmablasts suggests that the adverse prognosis conferred by plasmablastic disease may be due, at least in part, to secretion of this angiogenic cytokine, also suggesting that the subset of MM patients with plasmablastic features may derive particular benefit from antiangiogenic therapies.


Assuntos
Medula Óssea/irrigação sanguínea , Mieloma Múltiplo/irrigação sanguínea , Neovascularização Patológica/patologia , Fator A de Crescimento do Endotélio Vascular/análise , Adulto , Idoso , Idoso de 80 Anos ou mais , Biomarcadores Tumorais/análise , Biópsia , Medula Óssea/patologia , Feminino , Humanos , Imuno-Histoquímica , Masculino , Microcirculação , Pessoa de Meia-Idade , Mieloma Múltiplo/metabolismo , Mieloma Múltiplo/patologia , Prognóstico
16.
Braz. j. med. biol. res ; 38(11): 1609-1613, Nov. 2005. ilus
Artigo em Inglês | LILACS | ID: lil-414729

RESUMO

The biologic basis of the negative prognosis of plasmablastic myeloma is not fully understood. To determine whether histologically aggressive multiple myeloma (MM) is associated with a more angiogenic marrow environment, bone marrow samples from 50 recently diagnosed MM patients were evaluated. Twelve percent (6/50) of patients presented plasmablastic MM, and this feature correlated with moderate/strong intensity of vascular endothelial growth factor staining of plasma cells (P = 0.036). Although plasmablastic MM was not associated with increasing of microvessel density, this new evidence of increased expression of vascular endothelial growth factor on plasmablasts suggests that the adverse prognosis conferred by plasmablastic disease may be due, at least in part, to secretion of this angiogenic cytokine, also suggesting that the subset of MM patients with plasmablastic features may derive particular benefit from antiangiogenic therapies.


Assuntos
Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Pessoa de Meia-Idade , Humanos , Masculino , Fator A de Crescimento do Endotélio Vascular/análise , Medula Óssea/irrigação sanguínea , Mieloma Múltiplo/irrigação sanguínea , Neovascularização Patológica/patologia , Biópsia , Imuno-Histoquímica , Microcirculação , Biomarcadores Tumorais/análise , Medula Óssea/patologia , Mieloma Múltiplo/metabolismo , Mieloma Múltiplo/patologia , Prognóstico
17.
Acta Otorrinolaringol Esp ; 54(7): 527-30, 2003.
Artigo em Espanhol | MEDLINE | ID: mdl-14671926

RESUMO

Ahorizontal canal positional vertigo with apogeotropic and persistent directional changing nystagmus is reported. A new procedure consisting in cervical hiperflexion was used to determine the affected side in order to perform a particle repositioning manoeuvre.


Assuntos
Vertigem , Feminino , Humanos , Pessoa de Meia-Idade , Otolaringologia/métodos , Vertigem/diagnóstico , Vertigem/terapia
18.
Acta Otorrinolaringol Esp ; 54(3): 215-9, 2003 Mar.
Artigo em Espanhol | MEDLINE | ID: mdl-12825344

RESUMO

This study investigated 44 healthy elderly subjects aged between 64 and 87, who were analysed with videonystagmoscopy and quantitative videonystagmography, for establishing new standards for normal limits into this new diagnostic tool. 15.9% of the subjects were found to have spontaneous and provoked nystagmus at least in one position studied. Vertical nystagmus in head hanging position was the most frequent finding. In the Dix-Hallpike test we found one case of torsional nystagmus. No subject had seated position nystagmus. Nystagmus after head shaking and evoked nystagmus were not found.


Assuntos
Eletronistagmografia/instrumentação , Nistagmo Patológico/diagnóstico , Gravação de Videoteipe , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
19.
Artigo em Inglês | MEDLINE | ID: mdl-12355292

RESUMO

The aim of this study was to test a surgical technique for the treatment of stress urinary incontinence associated with genital prolapse through a transvaginal suspension anchored to the pubic bone. Thirty-seven patients with severe genital prolapse and urodynamically proven stress incontinence were operated on with this procedure from February 1998 to May 2000. Preoperatively a detailed history, pelvic examination and urodynamic studies were carried out. The degree of prolapse was assessed pre- and postoperatively in the lithotomy position in accordance with the classification proposed by Baden and Walker [8]. Two titanium bone screws with no. 1 polypropylene sutures attached to them and a battery-operated screw inserter are used to fix the vaginal sutures to the pubic bone bilaterally. The procedure is performed transvaginally with no abdominal or suprapubic incisions. Objective outcomes were assessed by symptom assessment, clinical examination and a full urodynamic evaluation at 6 months postoperatively, and annually by clinical evaluation. Subjective outcomes were assessed by directly interviewing the patients about their postoperative urinary symptoms and asking them to classify their level of satisfaction. An objective cure rate (no objective loss of urine during coughing in the absence of a simultaneous detrusor contraction) at the 6-month postoperative urodynamic evaluation was observed in 23 of 37 patients (62%). Recurrent anterior vaginal wall prolapse (grade 2) had developed in 7 of 37 patients (27%). Subjectively, 73% of the patients expressed satisfaction with the procedure. Early results using two bone screws into the pubis to fix the periurethral and perivesical tissues and vagina to the posterior surface of the pubic bone were disappointing. Based on our results we have abandoned the use of this procedure to correct stress incontinence associated with severe genital prolapse.


Assuntos
Parafusos Ósseos , Incontinência Urinária por Estresse/cirurgia , Procedimentos Cirúrgicos Urológicos , Prolapso Uterino/complicações , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Histerectomia Vaginal , Pessoa de Meia-Idade , Satisfação do Paciente , Incontinência Urinária por Estresse/complicações , Urodinâmica , Prolapso Uterino/cirurgia
20.
Arch Bronconeumol ; 37(6): 274-80, 2001 Jun.
Artigo em Espanhol | MEDLINE | ID: mdl-11412525

RESUMO

OBJECTIVE: To evaluate the efficacy and efficiency of a specialist outpatient clinic for corticosteroid-dependent asthmatics. The clinic was supervised by the respiratory medicine service of a reference hospital. MATERIAL AND METHODS: The first 20 consecutive patients (mean age 58.1+/- 9.5 years; 14 women, 6 men) treated at a specialist outpatient clinic for corticosteroid-dependent asthmatics were studied, with prospective follow-up of 12.33 +/- 4.6 months. The following variables were examined: a) forced spirometry (FS), b)corticosteroid doses, c) number and cost (NC) of visits to the outpatient clinic, d) NC of FS, e) NC of emergency room visits, f) NC of hospitalizations, g)cumulative cost of health care generated by these patients within the National Health Service of Catalonia (NHSC). The results were compared with those recorded in each patient's history. RESULTS: Findings were a) improved FEV1 (55.1 +/- 21.6% vs.60.1 +/- 21%, p = 0.02); b) decreased corticosteroid use (21.9 +/- 11.2 mg vs. 12.8 +/- 6.0 mg, p < 0.0001);c) statistically significant increase in NC to the outpatient clinic and NC of FS; d) statistically significant decrease in number of visits to emergency services and hospitalizations;e) reduced total cost of health care for these patients borne by the NHSC, which went from 4,400,070 Spanish pesetas to 1,171,157 Spanish pesetas. A hospital deficit of nearly 2,000,000 Spanish pesetas was canceled. CONCLUSIONS: Changing the system for delivering health care to these patients has led to improved care (effectiveness) and a noteworthy reduction in cost (efficiency). We conclude that medical specialists should play an important role in reorganizing the present health care system of the NHSC.


Assuntos
Corticosteroides/uso terapêutico , Asma/tratamento farmacológico , Corticosteroides/economia , Assistência Ambulatorial , Asma/economia , Custos e Análise de Custo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
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