Lung Sounds
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Bacteria isolated from the lower respiratory tract of sheep and their relationship to clinical signs of sheep respiratory disease
RESUMO: A doença respiratória é uma das doenças mais importantes em rebanhos ovinos. Esta pesquisa teve como objetivo determinar a etiologia bacteriana da doença respiratória e sua relação com sinais clínicos em ovinos criados nos estados de São Paulo e Rio de Janeiro, Brasil. Noventa e nove ovelhas machos e fêmeas dos Estados de São Paulo (SP) e
Pesq. Vet. Bras.. Publicado em: 02/12/2019
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2. Savitzky-Golay Filter for Denoising Lung Sound
ABSTRACT For computerized analysis of respiratory sounds to be effective, the acquired signal must be free from all the interfering elements. Different forms of noise which can degrade the quality of lung sounds are recording artifacts, power line/Radio Frequency (RF) interferences, ambient acoustic interferences, heart sound interference etc. Such interfere
Braz. arch. biol. technol.. Publicado em: 29/11/2018
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3. VITAL CAPACITY AND MAXIMUM PHONATION TIMES OF VOICELESS /e/ AND /s/ IN ADULT WOMEN / CAPACIDADE VITAL E TEMPOS MÁXIMOS DE FONAÇÃO DE /e/ ÁFONO E /s/ EM MULHERES ADULTAS
The sustaining of the phonation involves the respiratory and phonatory levels, hence, the duration of the maximum phonation times (MPT) may be affected by the vital capacity (VC) values, since it depends on lung volume to support the maximum phonation. The MPT investigation of voiceless sounds as /s/ and the voiceless /e/ (/ė/) dispense the glottal sour
Publicado em: 2010
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4. Method for automatic detection of wheezing in lung sounds
The present report describes the development of a technique for automatic wheezing recognition in digitally recorded lung sounds. This method is based on the extraction and processing of spectral information from the respiratory cycle and the use of these data for user feedback and automatic recognition. The respiratory cycle is first pre-processed, in order
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-07
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5. Análise não-linear no reconhecimento de padrões sonoros : estudo de caso para sons pulmonares / Nonlinear analysis in sound pattern recognition: case study of lung sounds
Nas últimas décadas uma considerável parcela das pesquisas nas áreas de Física e Matemática tem sido dedicada ao estudo de fenômenos não lineares. Uma possível explicação para isso foi o rápido desenvolvimento de sistemas computacionais, tanto em nível de hardware quanta em nível de software, algoritmos e técnicas de programação que propicia
Publicado em: 2009
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6. Canine neonatal clinical, hemogasometric and radiographic assessment in eutocia or elective cesarean section / Parâmetros clínicos, hemogasométricos e radiográficos para avaliação respiratória de neonatos caninos nascidos em eutocia ou cesariana eletiva
Technical and scientific deficit related to veterinary neonatology is conspicuous. It is known that the canine mortality rate is up to 30% in the first weeks of life. In Human Medicine, neonatal cardio-respiratory assistance is well established and widely used. Thus, the objectives of the present study were to compare the respiratory system pattern at birth
Publicado em: 2008
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7. Estudo de Fractalidade e Evolução Dinâmica de Sistemas Complexos
In this work, the study of some complex systems is done with use of two distinct procedures. In the first part, we have studied the usage of Wavelet transform on analysis and characterization of (multi)fractal time series. We have test the reliability of Wavelet Transform Modulus Maxima method (WTMM) in respect to the multifractal formalism, trough the calcu
Publicado em: 2007
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8. Um modelo genérico para fluxos em estruturas auto-similares e a sua relação com espectros afins: da geometria da árvore brônquica às características dos sons pulmonares. / A generic model for flows in self-similar strutuctures and its relation with affine spectra: from the bronchial tree geometry to the spectral characteristics of the lung sounds
Neste trabalho um esquema teórico é proposto para a produção de sons pulmonares normais de altas freqüências. Este esquema é baseado na discretização em multi-escala do fluxo de ar em elementos discretos independentes que interagem de maneira sintonizada com a estrutura geométrica que representa a árvore brônquica. Os resultados mostram que o esp
Publicado em: 2004
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9. Auscultation of the lung: past lessons, future possibilities.
Review of the history of auscultation of the lung reveals few scientific investigations. The majority of these have led to inconclusive results. The mechanism of production of normal breath sounds remains uncertain. Hypotheses for the generation of adventitious sounds are unproven. Advances in instrumentation for lung sound recording and analysis have provid
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10. Use of tracheal auscultation for the assessment of bronchial responsiveness in asthmatic children.
BACKGROUND: It can be difficult to assess bronchial responsiveness in children because of their inability to perform spirometric tests reliably. In bronchial challenges lung sounds could be used to detect the required 20% fall in the forced expiratory volume in one second (FEV1). A study was undertaken to determine whether a change in lung sounds corresponde
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11. Lung sound intensity in patients with emphysema and in normal subjects at standardised airflows.
BACKGROUND: A common auscultatory finding in pulmonary emphysema is a reduction of lung sounds. This might be due to a reduction in the generation of sounds due to the accompanying airflow limitation or to poor transmission of sounds due to destruction of parenchyma. Lung sound intensity was investigated in normal and emphysematous subjects in relation to ai
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12. Lung sounds.