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1.
Arq. bras. oftalmol ; Arq. bras. oftalmol;87(5): e2021, 2024. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1527852

ABSTRACT

ABSTRACT Purpose: Microperimetry has been used for several years as a form of visual function testing in patients with retinal diseases. Normal microperimetry values obtained with microperimeter MP-3 have not yet been fully published, and baseline values for topographic macular sensitivity and correlations with age and sex are needed to establish degrees of impairment. This study aimed to determine values for light sensitivity thresholds and fixation stability using the MP-3 in healthy individuals. Methods: Thirty-seven healthy volunteers (age, 28-68 years), underwent full-threshold microperimetry using a 4-2 (fast) staircase strategy with the standard Goldmann III stimulus size and 68 test points positioned identically to those in the Humphrey Field Analyzer 10-2 test grid. The fixation stability was simultaneously recorded during the microperimetry test. The relationship between global sensitivity and age was calculated using linear regression analysis. Results: Microperimetry was performed on 37 participants (74 eyes). The global mean sensitivity was 29.01 ± 1.44 (range, 26-31) dB. The mean central sensitivity at 2° measured by the MP-3 was 28.5 ± 1.77 dB in the right eye (OD) and 28.75 ± 1.98 dB in the left eye (OS). The total median fixation stability values within 2° and 4° were 80% and 96%, respectively. The linear regression analysis also revealed an age-related global sensitivity decline per year of -0.051 dB ± 0.018 (OD) and -0.078 dB ± 0.021 (OS). Conclusions: Microperimetry performed with the MP-3 allows for an automatic, accurate, and topography-specific examination of retinal sensitivity thresholds. The results of this study provide a normal and age-matched database of MP-3 microperimetry.


RESUMO Objetivos: A microperimetria tem sido usada há vários anos como uma forma de teste de função visual em pacientes com doenças da retina. Os valores normais de microperimetria obtidos com MP-3 ainda não foram totalmente publicados e os valores basais para sensibilidade macular topográfica e correlações com idade e sexo são necessários para estabelecer graus de comprometimento. O objetivo do trabalho é determinar valores para limiares de sensibilidade à luz e estabilidade de fixação usando o MP-3 em indivíduos normais. Métodos: Trinta e sete voluntários saudáveis (idade: 28-68 anos), submetidos à microperimetria de limiar total usando uma estratégia de escada 4-2 (rápida) com o tamanho de estímulo padrão Goldmann III e 68 pontos de teste posicionados de forma idêntica aos do Humphrey Field Analyzer 10-2 grade de teste. A estabilidade da fixação foi registrada simultaneamente durante o teste de microperimetria. A relação entre a sensibilidade global e a idade foi calculada por meio de análise de regressão linear. Resultados: A microperimetria foi realizada em 37 indivíduos (74 olhos). A sensibilidade média global foi de 29,01 ± 1,44 dB, intervalo: 26-31 dB. A mediana da sensibilidade central a 2° medida pelo MP-3 foi de 28,5 ± 1,77 dB (ER) e 28,75 ± 1,98 dB (OE). Os valores médios totais de estabilidade da fixação em 2° e 4° foram 80% e 96%, respectivamente. A análise de regressão linear também revelou um declínio de sensibilidade global relacionado à idade por ano de -0,051 dB ± 0,018 (ER) e -0,078 dB ± 0,021 (LE). Conclusões: A microperimetria realizada com o MP-3 permite um exame automático, preciso e específico da topografia dos limiares de sensibilidade da retina. Os resultados deste estudo fornecem um banco de dados normal e de idade correspondente da microperimetria MP-3.

2.
Pulmonology ; 2022 Jul 15.
Article in English | MEDLINE | ID: mdl-35851263

ABSTRACT

BACKGROUND: The cardiopulmonary exercise test (CPET) is the gold standard for assessing aerobic fitness; however, it is expensive, not widely available, and requires specialized equipment and staff. The incremental shuttle walking test (ISWT) is an exercise field test used to evaluate exercise capacity and may be an alternative to CPET in patients with lymphangioleiomyomatosis (LAM). OBJECTIVE: To investigate whether the ISWT can be used to assess maximal aerobic capacity in patients with LAM. METHODS: Forty-five women were evaluated on two days, and they randomly performed the CPET and ISWT. The maximum oxygen uptake (peak VO2) was evaluated using gas analyzers in both tests. The carbon dioxide production (VCO2), respiratory exchange ratio (RER), and heart rate (HR) were compared during peak exercise. Pearson's correlation and Bland-Altman assessed the association and agreement, respectively. The intraclass correlation coefficient (ICC) was used to assess the reliability of the data. RESULTS: All patients (46.1 ± 10.2 years) presented similar peak VO2, RER, and peak HR during the CPET and ISWT (15.6 ± 4.6 vs. 15.7 ± 4.4 ml·kg-1·min-1; 1.15±0.09 vs. 1.17±0.12; and 142.2 ± 18.6 vs. 141.5 ± 22.2 bpm, respectively; p>0.05). A good linear correlation (r = 0.79; p<0.001) and ICC (0.86; 95%CI 0.74-0.93) were observed between the peak VO2 in both tests. Predictive peak VO2 equations based on the ISWT performance are also presented. CONCLUSION: Our results suggest that the ISWT can be used to assess maximal exercise performance in patients with LAM, and it is a valuable option to be used as an alternative to the CPET and predict maximal exercise capacity.

3.
Rev. bras. oftalmol ; 81: e0102, 2022. tab, graf
Article in English | LILACS | ID: biblio-1407671

ABSTRACT

ABSTRACT The rate of visual field progression is an essential factor in determining risk of visual disability or blindness in glaucoma patients. Knowledge of the rate of progression of a particular patient, in combination with an estimation of their longevity and other clinical factors, allows clinicians to optimize management by providing appropriately aggressive treatment. Despite decades of research on the treatment of glaucoma, the natural history of glaucomatous visual field progression in untreated and treated patients remains unclear. The purpose of this review is to provide a comprehensive summary of the literature surrounding the rate of visual field progression in glaucoma. Most of the available data pertains to primary open angle glaucoma, but we will also review progression rates in other subtypes of open angle glaucoma, such as pseudoexfoliative glaucoma and normal tension glaucoma, as well as in primary angle closure glaucoma. Specifically, we will cover methods to identify rates of progression, rates of progression in treated versus untreated patients, factors that may influence progression, and lastly, suggest some parameters that might help clinicians in determining acceptable rates of visual field deterioration in patients with glaucoma.


RESUMO A taxa de progressão do campo visual é um fator essencial para determinar o risco de incapacidade visual ou cegueira em pacientes com glaucoma. Conhecer a taxa de progressão de um determinado paciente, em combinação com uma estimativa de sua longevidade e outros fatores clínicos, permite que os médicos otimizem a conduta, fornecendo um tratamento adequadamente agressivo. Apesar de décadas de pesquisa sobre o tratamento do glaucoma, a história natural da progressão do campo visual glaucomatoso em pacientes não tratados e tratados permanece pouco clara. O objetivo desta revisão é fornecer um resumo abrangente da literatura sobre a taxa de progressão do campo visual do glaucoma. A maioria dos dados disponíveis diz respeito ao glaucoma de ângulo aberto primário, mas também revisaremos as taxas de progressão em outros subtipos de glaucoma de ângulo aberto, como o glaucoma pseudoexfoliativo e o glaucoma de tensão normal, bem como o glaucoma primário de ângulo fechado. Especificamente, iremos cobrir métodos para identificar taxas de progressão, taxas de progressão em pacientes tratados versus não tratados, fatores que podem influenciar a progressão e, finalmente, sugerir alguns parâmetros que podem ajudar os médicos a determinar taxas aceitáveis de deterioração do campo visual em pacientes com glaucoma


Subject(s)
Humans , Visual Fields , Glaucoma/complications , Glaucoma/diagnosis , Linear Models , Glaucoma/physiopathology , Blindness/etiology , Risk Factors , Disease Progression , Visual Field Tests/methods , Intraocular Pressure
4.
Arq. bras. oftalmol ; Arq. bras. oftalmol;84(3): 203-208, May-June 2021. tab, graf
Article in English | LILACS | ID: biblio-1248956

ABSTRACT

ABSTRACT Purpose: To comparatively assess the macular sensitivity threshold of microperimetry and the fixation stability between the first (right) and second (left) tested eye of normal participants. Methods: Thirty healthy patients were randomly assigned to two groups. The participants underwent microperimetry in the fast mode and expert mode in groups I and II, respectively. Each participant underwent a single test and the right eye was tested first. Results: The mean macular sensitivity threshold (± standard deviation [SD]) was 24.5 ± 2.3 dB and 25.7 ± 1.1 dB in the first (right) and second (left) eyes of group I, respectively (p=0.0415) and 26.7 ± 4.5 dB and 27.3 ± 4.0 dB in the first (right) and second (left) eyes of group II, respectively (p=0.58). There was no statistically significant difference between eyes in either group (p=0.1512). Regarding fixation stability (evaluated in the microperimetry expert mode group), the mean ± SD percentage of fixation points within the 1-degree central macula (P1) was 87.9 ± 11.5% in the right eye and 93.8 ± 6.6% in the left eye. The paired t-test did not show a statistically significant difference between eyes (p=0.140). Mean ± SD P2 value was 95.5 ± 4.9% in the right eye and 98.5 ± 2.1% in the left eye. The analysis demonstrated an increase in the percentage of fixation points in the second tested eye compared with the first one (paired t-test= 2.364; p=0.034). There was a negative correlation between the macular sensitivity threshold of the right eye and the duration of the examination for both groups (microperimetry expert mode: r=-0.717; p=0.0026; microperimetry in the fast mode: r=-0.843; p<0.0001). Conclusion: Mean macular sensitivity threshold was higher in the second tested eye in the microperimetry in the fast mode group and was similar in both eyes in the expert mode. Our data suggest that comprehension of the examination by the individual may impact the results of the microperimetry test.(AU)


RESUMO Objetivo: Avaliar comparativamente o limiar de sensibilidade macular da microperimetria e a estabilidade de fixação entre o primeiro (direito) e o segundo (esquerdo) olhos testados de indivíduos normais. Métodos: Trinta pacientes saudáveis foram divididos aleatoriamente em 2 grupos. Os participantes foram submetidos à microperimetria no "fast mode" e no "expert mode" no grupo I e II, respectivamente. Cada participante foi submetido a um único teste e o olho direito foi testado primeiro. Resultados: No grupo I, o limiar médio de sensibilidade macular (± DP) foi de 24,5 ± 2,3 dB e 25,7 ± 1,1 dB nos olhos direito e esquerdo, respectivamente (p=0,0415). No grupo II foi de 26,7 ± 4,5 dB e 27,3 ± 4,0 dB nos olhos direito e esquerdo, respectivamente (p=0,58). Não houve diferença estatisticamente significativa entre os olhos dos dois grupos (p=0,1512). Em relação à estabilidade de fixação (avaliada no grupo microperimetria no "expert mode"), a média das porcentagens dos pontos de fixação dentro do 1 grau central da mácula (P1) ± DP foi de 87,9 ± 11,5% no olho direito e de 93,8 ± 6,6% no olho esquerdo. O teste t pareado não mostrou diferença estatística entre os olhos (p=0,140). O valor médio de P2 ± DP foi de 95,5 ± 4,9% no olho direito e 98,5 ± 2,1% no olho esquerdo. Foi demonstrado um aumento na porcentagem de pontos de fixação no segundo olho testado quando comparado ao primeiro (teste t pareado= 2,364; p=0,034). Houve correlação negativa entre o limiar de sensibilidade macular do olho direito e a duração do exame nos dois grupos (microperimetria no "expert mode": r=-0,717; p=0,0026; microperimetria no "fast mode": r=-0,843; p <0,0001). Conclusão: O limiar médio de sensibilidade macular foi maior no segundo olho testado no grupo microperimetria no "fast mode" e foi semelhante nos dois olhos no "expert mode". Nossos dados sugerem que a compreensão do exame pelo indivíduo pode impactar nos resultados da microperimetria.(AU)


Subject(s)
Humans , Visual Acuity , Fixation, Ocular , Macula Lutea/diagnostic imaging , Visual Fields , Bias
5.
Arq. bras. oftalmol ; Arq. bras. oftalmol;84(2): 179-182, Mar,-Apr. 2021. tab, graf
Article in English | LILACS | ID: biblio-1153122

ABSTRACT

ABSTRACT Microperimetry biofeedback training is a vision rehabilitation method that involves the training of attention and oculomotor control, and the rehabilitation of poorly located and non-functional preferred retinal loci. It can significantly improve distance and near visual acuity in age-related macular degeneration. Previous studies have shown that biofeedback training using electrical nystagmography can reduce nystagmus amplitude and increase foveation time. However, these improvements have not been sustained following training sessions. We hereby report a pediatric case of idiopathic nystagmus in an 11-year old patient treated with microperimetric biofeedback to improve visual acuity and fixation stability. The training had a beneficial impact, positively affecting fixation stability as well as distance and near reading vision. Subjectively, improvement in quality of life was also reported. Conversely to previous studies, the positive effects in this case were maintained for as long as twelve months following therapy. To the best of our knowledge, this is the first case with long-term benefits to be reported in the literature.(AU)


RESUMO O treinamento de biofeedback por microperimetria é um método de reabilitação da visão que envolve treinamento de atenção, controle oculomotor e reabilitação do locus preferencial de fixação da retina. Esse treinamento pode melhorar significativamente a acuidade visual para longe e perto na degeneração macular relacionada à idade. Estudos anteriores mostraram que o treinamento de biofeedback usando a nistagmografia elétrica pode reduzir a amplitude do nistagmo e aumentar o período de foveação. Entretanto, os resultados não se mantiveram após o término das sessões. Aqui é relatado um caso de tratamento com biofeedback por microperimetria para melhorar a acuidade visual e a estabilidade de fixação em uma criança de 11 anos de idade. O treinamento teve impacto benéfico e afetou positivamente a estabilidade da fixação e a visão para longe, para perto e de leitura. Subjetivamente, foi relatada melhoria da qualidade de vida. Em contraste com estudos anteriores, os efeitos positivos foram mantidos até 12 meses após a terapia. Até onde sabemos, este é o primeiro caso na literatura que relata benefícios de longo prazo.(AU)


Subject(s)
Humans , Child , Nystagmus, Pathologic/rehabilitation , Vision, Low/physiopathology , Visual Acuity , Visual Field Tests/instrumentation
6.
Arq. bras. oftalmol ; Arq. bras. oftalmol;84(2): 113-120, Mar,-Apr. 2021. tab, graf
Article in English | LILACS | ID: biblio-1153109

ABSTRACT

ABSTRACT Purpose: To compare the use of visual field and/or optical coherence tomography (OCT) combined with color retinography by non-glaucoma specialists for differentiating glaucoma from physiological cupping. Methods: Eighty patients with glaucoma or physiological cupping (40 of each) were randomized according to the examination used (GI: color retinography, GII: color retinography + visual field, GIII: color retinography + optical coherence tomography, GIV: color retinography + visual field + optical coherence tomography). Twenty non-specialist ophthalmologists diagnosed glaucoma from PowerPoint slide images, without direct patient examination. Results: Inter-examiner agreement was good for GII (ĸ: 0.63; 95%CI, 0.53-0.72), moderate for GIII (ĸ: 0.58; 95%CI, 0.48-0.68) and GIV (ĸ: 0.41; 95%CI, 0.31-0.51), and low for GI (ĸ: 0.30; 95%CI, 0.20-0.39) (p<0.001). Diagnostic accuracy was higher in GIII (15.8 ± 1.82) than GI (12.95 ± 1.46, p<0.001) and higher in GII (16.25 ± 2.02) than GI and GIV (14.10 ± 2.24) (both p<0.001). For glaucoma patients only, diagnostic accuracy in GII and GIII was superior to that in GI and GIV (both p<0.001). Sensitivity and specificity were 59% and 70.5% in GI; 86.5% and 76% in GII, 86.5% and 71.5% in GIII; and 68.5% and 72.5% in GIV, respectively. Accuracy was highest in GII (81.3% [95%CI, 77.1-84.8]), followed by GIII (79% [95%CI, 74.7-82.7]), GIV (70,5% [95%CI, 65.9-74.8]), and GI (64.8% [95%CI, 60.0-69.3]). Conclusions: Non-glaucoma specialists could not differentiate glaucoma from increased physiological cupping when using color retinography assessment alone. Diagnostic accuracy and inter-rater agreement improved significantly with the addition of visual field or optical coherence tomography. However, the use of both modalities did not improve sensitivity/specificity.(AU)


RESUMO Objetivos: Verificar a influência do campo visual e/ou tomografia de coerência óptica, quando analisados em associação à retinografia colorida, na diferenciação entre indivíduos com glaucoma daqueles com aumento fisiológico de escavação. Métodos: Oitenta pacientes com glaucoma ou aumento fisiológico de escavação (40 cada) foram randomizados de acordo com o exame testado (GI: retinografia colorida, GII: retinografia colorida + campo visual, GIII: retinografia colorida + tomografia de coerência óptica, GIV: retinografia colorida + campo visual + tomografia de coerência óptica). Vinte oftalmologistas não especialistas em glaucoma diagnosticaram glaucoma através de slides do PowerPoint, sem o exame direto do paciente. Resultados: A concordância interexaminador foi boa para o GII (ĸ: 0,63; 95%CI, 0,53-0,72), moderada para GIII (ĸ: 0,58; 95%CI, 0,48-0,68) e GIV (ĸ: 0,41; 95%CI, 0,31-0,51), e baixa para o GI (ĸ: 0,30; 95%CI, 0,20-0,39) (p<0,001). Acurácia diagnostica foi maior no GIII (15,8 ± 1,82) em comparação ao GI (12,95 ± 1,46, p<0,001) e o GII (16,25 ± 2,02) maior em comparação ao GI e GIV (14,10 ± 2,24) (para ambos, p<0,001). Para os pacientes com glaucoma, a acurácia diagnostica nos grupos GII e GIII foi superior do que em GI e GIV (ambos p<0,001). Sensibilidade e especificidade foram 59% e 70,5% no GI; 86,5% e 76% no GII, 86,5% e 71,5% no GIII; 68,5% e 72,5% no GIV, respectivamente. A acurácia foi maior no GII (81,3% [95%CI, 77,1-84,8]), seguido pelo GIII (79% [95%CI, 74,7-82,7]), GIV (70,5% [95%CI, 65,9-74,8]), e GI (64,8% [95%CI, 60,0-69,3]). Conclusões: A avaliação isolada da retinografia colorida por oftalmologistas não especialistas em glaucoma não pode diferenciar pacientes com glaucoma daqueles com aumento fisiológico de escavação. Houve aumento da acurácia diagnóstica e da concordância interobservador com o acréscimo do campo visual ou da tomografia de coerência óptica. Entretanto, o uso de ambas as modalidades não melhorou a sensibilidade/especificadade.(AU)


Subject(s)
Humans , Glaucoma/diagnostic imaging , Tomography, Optical Coherence , Specialization , Visual Fields , Visual Field Tests
7.
Pediatr Pulmonol ; 56(6): 1550-1557, 2021 06.
Article in English | MEDLINE | ID: mdl-33650810

ABSTRACT

OBJECTIVE: To evaluate the reproducibility of the modified shuttle test (MST) and to determine whether the test needs to be performed more than once to assess the exercise capacity of children and adolescents with cystic fibrosis (CF). METHODS: This was a longitudinal study including patients diagnosed with CF aged more than 6 years. The participants were followed for a period of 9 months and were evaluated at three different time points (visits 1, 2, and 3). Spirometric, anthropometric, clinical, and genetic data were collected, and two MSTs were performed at each visit. RESULTS: Forty-eight clinically stable volunteers with a mean age of 10.1 ± 2.7 years were initially included. The reproducibility of the test was evaluated using the distance achieved (DA) as the main variable. There were no significant differences in the DA (visit 1, p = .23; visit 2, p = .24; visit 3, p = .85), baseline heart rate (HR) (visit 1, p = .35; visit 2, p = .20; visit 3, p = .98), and peak HR (visit 1, p = .16; visit 2, p = .94; visit 3, p = .23) between the tests performed at each visit. The test-retest reliability demonstrated a high intraclass correlation coefficient at all visits (visit 1, 2, and 3: 0.83, 0.90, and 0.80, respectively) and the variation in HR was the main factor associated with the DA in the MST over time. CONCLUSION: The MST was found to be a reproducible and reliable test. The data presented here support the use of a single MST to evaluate and monitor exercise capacity of patients with CF during clinic visits.


Subject(s)
Cystic Fibrosis , Adolescent , Child , Cystic Fibrosis/diagnosis , Exercise Test , Exercise Tolerance , Humans , Longitudinal Studies , Reproducibility of Results , Spirometry
8.
J Equine Vet Sci ; 91: 103141, 2020 08.
Article in English | MEDLINE | ID: mdl-32684271

ABSTRACT

Vaquejada is an important Brazilian equine discipline. Understanding physiological adaptations of these athletes is crucial to improve properly performance, guaranteeing welfare. The objective of this study was to evaluate the influence of three vaquejada simulation tests (VST) on physiological parameters of horses and standardize a possible rest interval between races. Ten clinically healthy Quarter horses, 8.9 ± 4.3 year-old and 441.3 ± 25.0 kg, executed three VST, 5 days apart from each other. Vaquejada simulation tests consisted of two horses, a puller, and a helper, running with a bull on a soft sand track in which they must put the bull down. On M1, they ran three times with a 5-min rest between races; on M2, with a 10-min rest; and M3, with a 15-min rest. Clinical evaluation and blood sampling were made in all VST, before (T0), immediately after first run (T1), second run (T2), third run (T3) and at 30 minutes (T4), and 4 hours (T5) of recovery. Variables were statistically analyzed with a bifactorial comparison (P < .05). Exercise increased heart rate (HR), respiratory rate, body temperature (BT), lactate, triglycerides, packed cell volume, RBC, and hemoglobin concentration, with higher values in pull horses due to a more intense exercise. With 15-min of rest interval, helper horses showed lower values of glucose, aspartate aminotransferase, creatine kinase, BT, and higher values of triglycerides, also working at the same speed and distance with a lower HRmax and HRmed. Pull and helper horses had shown modifications of biomarkers. Furthermore, 15-min rest interval between races improved performance of helper horses as they used properly energy sources and cardiovascular function, respecting precepts of welfare.


Subject(s)
Physical Conditioning, Animal , Running , Animals , Body Temperature , Brazil , Cattle , Creatine Kinase , Horses , Male
9.
COPD ; 17(4): 392-400, 2020 08.
Article in English | MEDLINE | ID: mdl-32594774

ABSTRACT

The Glittre-ADL test assesses the functional capacity for activities of daily living of people with chronic obstructive pulmonary disease (COPD). In the test, a weighted backpack is worn (2.5 kg for women and 5.0 kg for men). The differential in weight between men and women is not common in other tests of exercise capacity and may limit the comparison of the test between sexes. The primary aim of this study was to validate the Glittre-ADL test performed without the backpack in people with COPD. Forty participants with mild to severe COPD (mean ± SD age: 70 ± 6 years; FEV1: 48 ± 20%predicted) were recruited and performed two six-minute walk tests (visit 1); two Glittre-ADL tests with backpack (visit 2), and the Glittre-ADL test with and without the backpack, in random order (visit 3). The Glittre-ADL test time was shorter without the backpack than with the backpack [mean difference -0.37 min (95%CI -0.59 to -0.15)] and heart rate (HR) and oxygen saturation (SpO2) were equivalents between tests [-1.31 beats/minute (-3.92 to 1.30) and -0.95% (-2.27 to 0.37), respectively]. The Glittre-ADL test without the backpack elicited similar HR and SpO2 responses as the test with the backpack, indicating equivalence of physiological demand. Thus, the Glittre-ADL test without the backpack was a valid, responsive, and appropriate test to assess functional capacity for activities of daily living.


Subject(s)
Activities of Daily Living , Pulmonary Disease, Chronic Obstructive/physiopathology , Pulmonary Disease, Chronic Obstructive/rehabilitation , Aged , Cross-Over Studies , Female , Humans , Male , Middle Aged , Predictive Value of Tests , Reproducibility of Results , Respiratory Function Tests , Walk Test , Weight-Bearing
10.
Respir Care ; 65(5): 643-649, 2020 May.
Article in English | MEDLINE | ID: mdl-32047118

ABSTRACT

BACKGROUND: Patients with cystic fibrosis develop decreased exercise capacity. However, the main factors responsible for this decline are still unclear. Thus, the objective of this study was to evaluate the factors influencing exercise capacity assessed with the modified shuttle test (MST) in individuals with cystic fibrosis. METHODS: A cross-sectional study was carried out in subjects with a diagnosis of cystic fibrosis who were 6-26 y old and were regularly monitored at 2 cystic fibrosis reference centers in Brazil. Individuals who were unable to perform the tests or who exhibited hemodynamic instability and exacerbation of respiratory symptoms were excluded. Anthropometric, clinical, and genotype data were collected. In addition, lung function and exercise capacity were evaluated with the MST. RESULTS: 73 subjects (mean age 12.2 ± 4.9 y and FEV1 76.8 ± 23.3%) were included. The mean distance achieved in the MST was 765 ± 258 m (71.6% of predicted). The distance achieved on the MST correlated significantly with age (r = 0.49, P < .001), body mass index (r = 0.41, P < .001), resting heart rate (r = -0.51, P < .001), and FEV1 (r = 0.24, P = .042). Subjects with FEV1 > 67% of predicted (P = .02) and those with resting heart rate < 100 beats/min (P = .01) had a greater exercise capacity. Resting heart rate, age, and FEV1 (%) were found as significant variables to explain the distance achieved on the MST (R2 = 0.48, standard error = 191.0 m). CONCLUSIONS: The main determinants of exercise capacity assessed with the MST in individuals with cystic fibrosis were resting heart rate, age, and lung function.


Subject(s)
Cystic Fibrosis/physiopathology , Exercise Test , Exercise Tolerance/physiology , Adolescent , Adult , Brazil , Child , Cross-Sectional Studies , Female , Forced Expiratory Volume/physiology , Heart Rate , Humans , Lung/physiopathology , Male , Oxygen Consumption , Respiratory Function Tests , Young Adult
11.
Front Physiol ; 10: 1245, 2019.
Article in English | MEDLINE | ID: mdl-31632291

ABSTRACT

INTRODUCTION: Several tests may be used to assess exercise intolerance in severe therapy-resistant asthma (STRA), including the gold standard cardiopulmonary exercise test (CPET) and the modified shuttle test (MST). OBJECTIVE: To correlate the distance achieved in the MST with peak oxygen uptake (VO2peak) and to compare the maximal heart rate (HRmax) obtained in both tests in children and adolescents with STRA. METHODS: This is a cross-sectional study, with 19 children and adolescents with STRA. Demographic, anthropometric, clinical data, and spirometric values were collected. CPET and the MST were performed in two consecutive visits. HRmax, pulse oxygen saturation, and dyspnea were compared between tests. The distance achieved in the MST was correlated with VO2peak. RESULTS: Nineteen patients with a mean age of 11.5 ± 2.5 years were included. The mean HRmax (bpm) achieved was 180.8 ± 12.10 for the MST and 187.6 ± 9.35 for CPET, whereas the mean HRmax as a percentage of predicted (HRmax%) was 90.7 ± 6.5 for the MST and 93.8 ± 4.5 for CPET. A difference of only 6 bpm was found for HRmax (p = 0.10) and of 3% for HRmax% (p = 0.06) between tests. A strong correlation was found between the MST (r = 0.79; p = 0.001) and VO2peak measured through CPET. However, there were no correlations between the MST and both body mass index (r = -0.14; p = 0.564) and forced expiratory volume in the first second - FEV1 (r = -0.02; p = 0.917). CONCLUSION: The results demonstrate that the MST distance strongly correlates with VO2peak, measured through CPET, and the main physiological variable responses were similar between both tests. Our results provide additional data for the use of the MST to assess exercise capacity in children and adolescents with STRA.

12.
J Exerc Rehabil ; 14(2): 244-252, 2018 Apr.
Article in English | MEDLINE | ID: mdl-29740559

ABSTRACT

The aims of this work were to compare the performances of male and female cadet and junior judo athletes and to develop classificatory tables to these judo-specific tests for international-level from these ages. Data collected during training camps of male and female cadet and junior judo teams from three nations (Brazil, Serbia, and Spain) were analyzed, totalizing 252 individual results of special judo fitness test (SJFT), and 222 and 208 of dynamic and isometric judogi chin-up tests, respectively. Juniors performed better than cadets in the SJFT, with higher number of throws in A, B, C, and total (P<0.001 for all comparisons), lower final heart rate (P=0.021), and lower index (P<0.001), as well as higher relative performance in the dynamic chin-up test (P<0.001). Furthermore, male athletes presented better performance compared to female athletes in the SJFT (higher number of throws in A, B and total, and lower index) and in the isometric and dynamic chin-up tests (higher absolute and relative performances) (P<0.001 for all comparisons). Considering these differences, tables were established by sex and age groups, using percentile values. Thereby, each of the parameters of the SJFT (number of throws, heart rate after and 1 min after the test, and SJFT index), as well as absolute and relative results in chin-up judogi tests, were classified by sex and age. These classificatory tables can be useful for judo coaches to monitor specific physical performance during different phases of periodization process.

13.
Campinas; s.n; 2018. 127 p. ilus, tab.
Thesis in Portuguese | LILACS | ID: biblio-909410

ABSTRACT

Objetivos: 1) Investigar as propriedades psicométricas da versão portuguesa do "National Eye Institute Visual Functioning Questionnaire" (NEI VFQ-25) num grupo de pacientes com diferentes doenças oculares (catarata, glaucoma e degeneração macular relacionada à idade - DMRI). 2) Analisar de maneira longitudinal qual região do campo visual avaliada através da perimetria computadorizada apresenta maior impacto na qualidade de vida (QV) em pacientes com glaucoma. 3) Apresentar uma nova metodologia utilizando dados de perimetria computadorizada e do NEI VFQ-25 para investigar fatores preditivos associados ao desenvolvimento de deficiência visual em pacientes com glaucoma. Métodos: 1) O primeiro estudo, realizado na Universidade Estadual de Campinas é uma avaliação transversal de pacientes com glaucoma, catarata e DMRI para validação psicométrica do NEI VFQ-25 através da análise de Rasch. 2) O segundo e terceiro estudos foram desenvolvidos na Universidade da Califórnia em San Diego, com pacientes de uma coorte na qual o NEI VFQ-25 era preenchido anualmente e exame de perimetria computadorizada realizado a cada 6 meses. No segundo estudo, a associação entre as taxas de mudança dos índices de QV do NEI VFQ-25 e a progressão do dano glaucomatoso em diferentes regiões do campo visual (central inferior, central superior, periférica superior e periférica inferior) foram analisada através de um modelo longitudinal de regressão linear multivariada misto. 3) No terceiro estudo, um modelo de análise de transição latente foi utilizado para classificar os pacientes (com deficiência visual ou não) de acordo com resultados do NEI VFQ-25 no exame inicial e estimar a probabilidade dos pacientes desenvolverem deficiência visual ao longo do seguimento, baseados na perimetria computadorizada. Resultados: 1) De acordo com a análise de Rasch, ao observamos os valores de ajuste, quatro ítens apresentaram valores de ajuste fora do padrão. Além disso, na análise de componente principal, o NEI VFQ-25 não se mostrou unidimensional, sendo que oito itens foram identificados como pertencentes de um componente secundário (sócioemocional). Estes itens pertencem ao domínio de: saúde geral, saúde mental, limitações e dependência. Após a exclusão destes itens, foi possível isolar os - itens do NEI VFQ-25 relacionados apenas com a QV associada à função visual. 2) O segundo estudo mostrou uma correlação significativa entre mudanças nos índices de QV do NEI VFQ-25 com a progressão do glaucoma em diferentes regiões do campo visual, principalmente na região central inferior. Para cada 1 decibel (dB)/ano de queda na sensibilidade binocular retiniana na região central inferior, ocorreu uma queda de 2,6 unidades/ano no índice de QV do NEI VFQ-25. As maiores quedas nos índices de QV também ocorreram em pacientes com doença mais avançada no exame inicial. 3) No terceiro estudo, pacientes classificados como não-deficientes visuais apresentaram probabilidade de 14,2% de desenvolverem a deficiência durante o seguimento. As taxas de progressão do dano glaucomatoso na perimetria computadorizada foram 4 vezes mais rápidas nos pacientes que desenvolveram deficiência visual em comparação com aqueles que não desenvolveram. Além disso, a análise multivariada permitiu mostrar que, apesar dos pacientes com glaucoma avançado no exame inicial apresentarem um risco maior de desenvolver deficiência visual durante o seguimento, a velocidade de progressão da doença se mostrou um fator de risco ainda mais importante para o surgimento da deficiência visual. Conclusões: 1) A versão portuguesa do NEI VFQ-25 não é unidimensional, ou seja, o presente estudo evidenciou itens que podem estar relacionados a um componente sócio-emocional. 2) Uma piora na sensibilidade retiniana no exame de perimetria na região central inferior apresenta a maior correlação com queda nos índices de QV em pacientes com glaucoma. 3) Uma nova metodologia baseada nos resultados do NEI VFQ-25 e da perimetria computadorizada para classificar e estimar o risco de pacientes com glaucoma desenvolverem deficiência visual foi apresentada(AU)


Objectives: To investigate the psychometric properties of the Brazilian Portuguese version of the National Eye Institute Visual Functioning Questionnaire (NEI VFQ-25) in a group of patients with different eye diseases. 2) To evaluate the association between rates of visual field loss in different regions and longitudinal changes in quality of life (QoL) in glaucoma patients. 3) To present a new methodology that uses data from the NEI VFQ-25 and automated perimetry to investigate predictive factors associated with development of vision-related disability in glaucoma. Methods: 1) The first project was a cross-sectional study performed at University of Campinas to evaluate the psychometric properties of the Portuguese version of the NEI VFQ-25 using Rasch analysis in patients with glaucoma, cataract and age related macular disease. 2) The second and third projects were performed at University of California in San Diego and had a prospective, observational cohort design in which all subjects had the NEI VFQ-25 performed annually and standard automated perimetry at 6-month intervals. In the second study, the association between change in NEI VFQ-25 Rasch-calibrated scores and change in different regions (central inferior, central superior, peripheral inferior, and peripheral superior) of the visual field was investigated with a joint multivariable longitudinal linear mixed model. 3) In the third study, a latent transition analysis model was used to categorize patients with visual disability or not at baseline according to NEI VFQ-25 results and to estimate the probability of developing vision-related disability during follow-up, according to standard automated perimetry results. Results: 1) In the first study, according to Rasch analysis, four items were found to misfit and according to the principal component analysis, the NEI VFQ-25 was not unidimensional, with eight items belonging to a second component (socioemotional). These items belonged to the following subscales: general health, mental health, role limitations and dependency. After excluding those items, we were able to isolate items from the NEI VFQ-25 that were related only to a visual functioning component. 2) The second study showed significant correlations between change in the NEI VFQ-25 Rasch scores during follow- - up and change in different regions of the visual field, especially the central inferior area. Each 1 decibel (dB)/year change in binocular mean sensitivity of the central inferior area was associated with a decline of 2.6 units/year in the NEI VFQ-25 scores. Greater declines in NEI VFQ-25 scores were also seen in patients who had worse visual field sensitivity at baseline. 3) In the third study, patients classified as nondisabled at baseline had a 14.2% probability of developing disability during follow-up. Rates of visual field loss as estimated by integrated binocular MS were almost 4 times faster for those in whom disability developed versus those in whom it did not. Multivariable analysis showed that fast progressors were at higher risk of developing visual disability than those with worse baseline disease. Conclusions: 1) The Portuguese version of the NEI VFQ-25 is not an unidimensional instrument. We were able to find items that belonged to a different trait, possibly related to a socio-emotional component. 2) Progressive decline in retinal sensitivity in the central inferior area of the visual field had the strongest association with longitudinal decline in QoL of patients with glaucoma. 3) We presented a new methodology for classification and analysis of change in patient-reported QoL outcomes, allowing construction of models for predicting vision-related disability in glaucoma.(AU)


Subject(s)
Humans , Male , Female , Glaucoma , Quality of Life , Cataract , Cross-Sectional Studies , Glaucoma/epidemiology , Macular Degeneration , Optic Nerve Diseases , Psychometrics , Quality of Life/psychology , Retinal Ganglion Cells , Surveys and Questionnaires , Vision Disorders , Visual Field Tests
14.
Rev. bras. oftalmol ; 76(6): 285-288, nov.-dez. 2017. graf
Article in English | LILACS | ID: biblio-899096

ABSTRACT

Abstract Objective: To determine the influence of visual field results in the diagnosis of glaucoma. Methods: A questionnaire with ophthalmologists was conducted where slides of a digital photograph of the optic disc and computerized visual field exam were presented.(Physicians were instructed to answer whether glaucoma was observed in each of the slides). No other information was given to those examiners. Half of the patients had glaucoma with corresponding visual field, and the other half had physiological cupping and normal visual field. The slides were equally divided between retinography and corresponding visual field (same patient) and exams randomly exchanged, where an optic disc of glaucoma with a normal visual field was placed, and vice-versa. The order in which the slides were presented was also randomized. Results: Forty slides were evaluated by 29 ophthalmologists. No glaucoma specialist was included. The overall agreement among the examiners (Kappa) was 0.270 ± 0.281, and 0.261 ± 0.238 for the exams of the same eye and was 0.274 ± 0.217 from the slides with the exams changed (p=0.4). The diagnosis was made correctly in glaucoma patients with corresponding visual field exam in 66.89% of the cases, and in 66.20% of patients with physiological cupping. When the exams were exchanged, the results dropped to 34.13% and 35.86%, respectively (p<0.001 for both). Conclusion: Visual field results may influence the diagnosis of glaucoma by non-glaucoma specialists.


Resumo Objetivo: Avaliar a influência da campimetria computadorizada no diagnóstico do glaucoma. Métodos: Foi realizado questionário com oftalmologistas apresentando slides com uma fotografia digital de disco óptico e campo visual computadorizado. Os médicos deveriam assinalar se o exames apresentados eram de glaucoma ou não. Nenhuma outra informação foi passada para os examinadores. Metade dos pacientes apresentavam glaucoma com dano correspondente de campo visual, e a outra metade aumento fisiológico da escavação e campo visual normal. Os slides foram igualmente divididos em: retinografia e campo visual correspondentes (mesmo paciente) e exames invertidos de forma aleatória, colocando um disco óptico de glaucoma com um campo visual normal e vice-versa. A ordem de apresentação dos slides foi randomizada previamente. Resultados: Foram incluídos 40 slides, avaliados por 29 oftalmologistas. Nenhum especialista em glaucoma foi incluído. A concordância entre os examinadores (Kappa) foi de 0,270 ± 0,281, sendo de 0,261 ± 0,238 para os exames correspondentes e 0,274 ± 0,217 para os slides com os exames trocados (p=0,4). O diagnóstico foi realizado corretamente nos pacientes com glaucoma com o campo visual correspondente em 66,89% dos casos, e em 66,20% nos pacientes com aumento da escavação (normais). Quando houve a troca da correspondência dos exames, os valores caíram para 34,13% e 35,86%, respectivamente (p<0,001 para ambos). Conclusão: O conhecimento prévio dos resultados do campo visual pode influenciar o diagnóstico do glaucoma.


Subject(s)
Humans , Optic Disk/diagnostic imaging , Photography , Glaucoma/diagnosis , Visual Field Tests , Retina/diagnostic imaging , Visual Fields , Observer Variation , Surveys and Questionnaires , Reproducibility of Results , Ophthalmologists , Nerve Fibers/pathology
15.
Arq. bras. oftalmol ; Arq. bras. oftalmol;80(2): 118-121, Mar.-Apr. 2017. graf
Article in English | LILACS | ID: biblio-838785

ABSTRACT

ABSTRACT We report retinal functional and structural changes of a 40-year-old man diagnosed with occult macular dystrophy. Comprehensive ophthalmological evaluation was performed, followed by spectral-domain optical coherence tomography (SD-OC - Heidelberg) and image acquisition using an adaptive optics (AO) camera (RTX1, Imagine Eyes) for photoreceptor density analysis. Functional tests included full-field ERG (ERG) and multifocal electroretinography (mfERG) (Diagnosys, LLC) and microperimetry with scanning laser ophthalmoscope (SLO) fixation controlled (MAIA, CenterVUE). OCT revealed a line of discontinuity corresponding to cone outer-segment photoreceptors associated with a loss of cone density, highlighted by a dark blue spot on the AO co ne-density map on the fovea in both eyes. Loss of central sensitivity was revealed using microperimetry; ERG was within the normal range, although the mfERG showed a reduced central response amplitude.


RESUMO Relatamos exames de função e estrutura retiniana de paciente masculino, de 40 anos, com diagnóstico clínico de Distrofia Macular Oculta (DMO). Avaliação oftalmológica completa foi seguida por tomografia de Coerência Óptica (SD-OCT - Heidelberg) e exame com câmara de fundo de olho com tecnologia "Adaptive Optics" (AO - RTX1, Imagine Eyes) para análise da densidade de fotorreceptores. Os exames funcionais incluíram: Eletroretinografia de campo total (ERG) e multifocal (mfERG) (Diagnosys - LLC) e microperimetria com controle de fixação (MAIA - CenterVUE). Os exames revelam descontinuidade da camada de fotorreceptores na região central da fóvea em ambos os olhos pelo SD-OCT em associação com perda de densidade no mosaico cones, representado por mancha azulada no mapa do AO. Os exames de função apresentam diminuição da acuidade visual (20/80; 20/50), redução de sensibilidade central na microperimetria. Como esperado, o ERG está dentro da normalidade, mas há redução da amplitude das respostas centrais do mfERG em ambos os olhos.


Subject(s)
Humans , Male , Adult , Macular Degeneration/diagnostic imaging , Retinal Cone Photoreceptor Cells , Tomography, Optical Coherence/methods , Electroretinography/methods , Visual Field Tests/methods , Fovea Centralis/diagnostic imaging
16.
Ciênc. rural ; Ciênc. rural (Online);46(1): 83-88, jan. 2016. tab, graf
Article in English | LILACS | ID: lil-767008

ABSTRACT

ABSTRACT: Investigations demonstrate that the wind is the factor that causes the biggest negative influence on water application of sprinkler irrigation systems. Therefore, this paper aims to evaluate, in in-field conditions, the influence of wind on the water distribution uniformity of a mechanical lateral move sprinkler system used for irrigation in rice crop in the South of Rio Grande do Sul State, Brazil. The equipment is located at the Campo Experimental de Terras Baixas (ETB) of EMBRAPA/CPACT and operates with water emitters model I-Wob installed in drop tubes in a distance of 2.8m above the soil surface, having a uniform space of 2.3m between each other and pressure regulators of 68.9kPa. Sixteen in-field evaluations were done and they permitted to infer that the higher is the wind speed, the lower are the values of Christiansen Uniformity (CU) and of Distribution Uniformity (DU) coefficients. Besides, it can be affirmed that even in unfavorable wind conditions, the mechanical lateral move irrigation equipment presented desirable indexes of water application uniformity.


RESUMO: Estudos demonstram que o vento é o fator que causa maior influência negativa na aplicação de água de sistemas de irrigação por aspersão. Sendo assim, este estudo tem por objetivo avaliar, em condições de campo, a influência do vento sobre a uniformidade de distribuição de água de um sistema mecanizado do tipo lateral móvel, utilizado na irrigação de arroz no sul do Rio Grande do Sul. O equipamento, localizado no Campo Experimental de Terras Baixas (ETB) da EMBRAPA/CPACT, opera com emissores de água modelo I-Wob instalados em tubos pendurais a uma distância de 2,8m da superfície do solo, espaçados uniformemente entre si em 2,3m, com reguladores de pressão de 68,9kPa. As 16 avaliações de campo realizadas permitiram inferir que quanto maior a velocidade do vento menor os valores dos coeficientes de uniformidade de Christiansen (CU) e de distribuição (UD). Além disso, pode-se afirmar que, mesmo em condições adversas de vento, o equipamento de irrigação mecanizada do tipo lateral móvel apresentou índices desejáveis de uniformidade de aplicação de água.

17.
Ci. Rural ; 46(1)2016.
Article in English | VETINDEX | ID: vti-709483

ABSTRACT

ABSTRACT: Investigations demonstrate that the wind is the factor that causes the biggest negative influence on water application of sprinkler irrigation systems. Therefore, this paper aims to evaluate, in in-field conditions, the influence of wind on the water distribution uniformity of a mechanical lateral move sprinkler system used for irrigation in rice crop in the South of Rio Grande do Sul State, Brazil. The equipment is located at the Campo Experimental de Terras Baixas (ETB) of EMBRAPA/CPACT and operates with water emitters model I-Wob installed in drop tubes in a distance of 2.8m above the soil surface, having a uniform space of 2.3m between each other and pressure regulators of 68.9kPa. Sixteen in-field evaluations were done and they permitted to infer that the higher is the wind speed, the lower are the values of Christiansen Uniformity (CU) and of Distribution Uniformity (DU) coefficients. Besides, it can be affirmed that even in unfavorable wind conditions, the mechanical lateral move irrigation equipment presented desirable indexes of water application uniformity.


RESUMO: Estudos demonstram que o vento é o fator que causa maior influência negativa na aplicação de água de sistemas de irrigação por aspersão. Sendo assim, este estudo tem por objetivo avaliar, em condições de campo, a influência do vento sobre a uniformidade de distribuição de água de um sistema mecanizado do tipo lateral móvel, utilizado na irrigação de arroz no sul do Rio Grande do Sul. O equipamento, localizado no Campo Experimental de Terras Baixas (ETB) da EMBRAPA/CPACT, opera com emissores de água modelo I-Wob instalados em tubos pendurais a uma distância de 2,8m da superfície do solo, espaçados uniformemente entre si em 2,3m, com reguladores de pressão de 68,9kPa. As 16 avaliações de campo realizadas permitiram inferir que quanto maior a velocidade do vento menor os valores dos coeficientes de uniformidade de Christiansen (CU) e de distribuição (UD). Além disso, pode-se afirmar que, mesmo em condições adversas de vento, o equipamento de irrigação mecanizada do tipo lateral móvel apresentou índices desejáveis de uniformidade de aplicação de água.

18.
Ci. Rural ; 46(1)2016.
Article in English | VETINDEX | ID: vti-709424

ABSTRACT

ABSTRACT: Investigations demonstrate that the wind is the factor that causes the biggest negative influence on water application of sprinkler irrigation systems. Therefore, this paper aims to evaluate, in in-field conditions, the influence of wind on the water distribution uniformity of a mechanical lateral move sprinkler system used for irrigation in rice crop in the South of Rio Grande do Sul State, Brazil. The equipment is located at the Campo Experimental de Terras Baixas (ETB) of EMBRAPA/CPACT and operates with water emitters model I-Wob installed in drop tubes in a distance of 2.8m above the soil surface, having a uniform space of 2.3m between each other and pressure regulators of 68.9kPa. Sixteen in-field evaluations were done and they permitted to infer that the higher is the wind speed, the lower are the values of Christiansen Uniformity (CU) and of Distribution Uniformity (DU) coefficients. Besides, it can be affirmed that even in unfavorable wind conditions, the mechanical lateral move irrigation equipment presented desirable indexes of water application uniformity.


RESUMO: Estudos demonstram que o vento é o fator que causa maior influência negativa na aplicação de água de sistemas de irrigação por aspersão. Sendo assim, este estudo tem por objetivo avaliar, em condições de campo, a influência do vento sobre a uniformidade de distribuição de água de um sistema mecanizado do tipo lateral móvel, utilizado na irrigação de arroz no sul do Rio Grande do Sul. O equipamento, localizado no Campo Experimental de Terras Baixas (ETB) da EMBRAPA/CPACT, opera com emissores de água modelo I-Wob instalados em tubos pendurais a uma distância de 2,8m da superfície do solo, espaçados uniformemente entre si em 2,3m, com reguladores de pressão de 68,9kPa. As 16 avaliações de campo realizadas permitiram inferir que quanto maior a velocidade do vento menor os valores dos coeficientes de uniformidade de Christiansen (CU) e de distribuição (UD). Além disso, pode-se afirmar que, mesmo em condições adversas de vento, o equipamento de irrigação mecanizada do tipo lateral móvel apresentou índices desejáveis de uniformidade de aplicação de água.

19.
Ci. Rural ; 46(1): 83-88, 2016.
Article in English | VETINDEX | ID: vti-379157

ABSTRACT

Investigations demonstrate that the wind is the factor that causes the biggest negative influence on water application of sprinkler irrigation systems. Therefore, this paper aims to evaluate, in in-field conditions, the influence of wind on the water distribution uniformity of a mechanical lateral move sprinkler system used for irrigation in rice crop in the South of Rio Grande do Sul State, Brazil. The equipment is located at the Campo Experimental de Terras Baixas (ETB) of EMBRAPA/CPACT and operates with water emitters model I-Wob installed in drop tubes in a distance of 2.8m above the soil surface, having a uniform space of 2.3m between each other and pressure regulators of 68.9kPa. Sixteen in-field evaluations were done and they permitted to infer that the higher is the wind speed, the lower are the values of Christiansen Uniformity (CU) and of Distribution Uniformity (DU) coefficients. Besides, it can be affirmed that even in unfavorable wind conditions, the mechanical lateral move irrigation equipment presented desirable indexes of water application uniformity.(AU)


Estudos demonstram que o vento é o fator que causa maior influência negativa na aplicação de água de sistemas de irrigação por aspersão. Sendo assim, este estudo tem por objetivo avaliar, em condições de campo, a influência do vento sobre a uniformidade de distribuição de água de um sistema mecanizado do tipo lateral móvel, utilizado na irrigação de arroz no sul do Rio Grande do Sul. O equipamento, localizado no Campo Experimental de Terras Baixas (ETB) da EMBRAPA/CPACT, opera com emissores de água modelo I-Wob instalados em tubos pendurais a uma distância de 2,8m da superfície do solo, espaçados uniformemente entre si em 2,3m, com reguladores de pressão de 68,9kPa. As 16 avaliações de campo realizadas permitiram inferir que quanto maior a velocidade do vento menor os valores dos coeficientes de uniformidade de Christiansen (CU) e de distribuição (UD). Além disso, pode-se afirmar que, mesmo em condições adversas de vento, o equipamento de irrigação mecanizada do tipo lateral móvel apresentou índices desejáveis de uniformidade de aplicação de água.(AU)


Subject(s)
Agricultural Irrigation , Oryza , Wind
20.
Rev. bras. cineantropom. desempenho hum ; 17(6): 753-762, Nov.-Dec. 2015.
Article in English | LILACS | ID: lil-771173

ABSTRACT

Abstract Futsal has intermittent characteristics with different requirements of displacements and changes of direction, requiring simultaneously aerobic and anaerobic capacities of athletes. So, during counter-attacks and returns to defense or fast movements to get rid or perform marking, there is maximum mobilization of specific capabilities of the sport and the ability to perform high-intensity intermittent exercise is a key factor of performance. The aim of this study was to perform an expositive review on the physiological characteristics, high-intensity interval training and aerobic evaluation methods that have been used and suggested in scientific literature in original studies. A search in scientific portals Google Scholar, Scopus®, SciELO®, ScienceDirect® (Elsevier) and PubMed® was conducted to find articles with publication date since 2000 using the following terms in different combinations: “Futsal”, “performance”, “aerobic evaluation”, “high-intensity interval training”, “field tests” and their variations in English. Analysis of physiological indexes related to game performance can help in the knowledge about the aerobic fitness of Futsal players and improve training assessment, prescription and monitoring, also serving as a reference to assist professionals of this sport in the preparation of high intensity interval training programs to meet the particular needs of the sport. Field tests with specific features of the sport were created as a means of assessment and also training prescription and are recommended due to their specificity and ecological validity.


Resumo O futsal apresenta características intermitentes com diferentes exigências de deslocamentos e mudanças de direção, exigindo simultaneamente as capacidades aeróbias e anaeróbias dos atletas. Assim, durante os contra-ataques e retornos à defesa, ou movimentações rápidas para se desmarcar ou realizar marcação, há uma mobilização máxima das capacidades específicas da modalidade, sendo que a habilidade de realizar exercícios intermitentes de alta intensidade é um fator decisivo da performance. O objetivo do presente trabalho foi realizar uma revisão de literatura expositiva sobre as características fisiológicas, treinamento intervalado de alta intensidade e métodos de avaliação aeróbia que vêm sendo utilizados e sugeridos na literatura científica em estudos originais. Realizou-se uma pesquisa nos portais científicos da Google Scholar, Scopus®, SciELO®, ScienceDirect® (Elsevier) e PubMed® buscando artigos com data de publicação a partir do ano 2000 pelos seguintes termos em diferentes combinações: “futsal”, “performance”, “avaliação aeróbia”, “treinamento intervalado de alta intensidade”, “testes de campo” e suas variações em inglês. A análise dos índices fisiológicos relacionados à performance de jogo podem auxiliar no conhecimento a respeito da aptidão aeróbia de jogadores de futsal e aprimorar a avaliação, prescrição e acompanhamento do treinamento. Adicionalmente, servem de referência para auxiliar os profissionais da modalidade na elaboração de programas de treinamento intervalado de alta intensidade que atendam às necessidades específicas do esporte. Os testes de campo com características próprias da modalidade foram criados como forma de avaliação e também prescrição de treinamento e são recomendados pela especificidade e validade ecológica que possuem.

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