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1.
Arq. ciências saúde UNIPAR ; 23(3)set-dez. 2019.
Article in Portuguese | LILACS | ID: biblio-1046203

ABSTRACT

A mobilidade diafragmática é essencial para a ventilação pulmonar. Pela ultrassonografia sua mensuração é direta, porém o processamento das medidas encontra-se em divergência na literatura. Indica-se pelo valor médio das três incursões respiratórias máximas ou o maior valor dentre elas restringindo à variações de 10%. Dessa forma, não existe um consenso em relação ao processamento da medida de mobilidade diafragmática máxima. Objetivo: Comparar dois diferentes processamentos das medidas pela ultrassonografia para o maior valor de mobilidade diafragmática. Materiais e métodos: Estudo observacional transversal. Avaliou-se a mobilidade diafragmática pela ultrassonografia, com um transdutor convexo (3 MHz) posicionado anteriormente na região subcostal e leve inclinação cranial, em decúbito dorsal. Visualizou-se o hemidiafragma direito pelo ponto médio entre a linha médio clavicular e axilar anterior. Para visualizar a janela do diafragma e mensurar sua mobilidade foi utilizado o modo B, seguido do modo M. Os participantes realizaram inspirações máximas e os maiores valores com diferença máxima de 10% entre eles mensurados e registrados. Para análise, o maior valor e o valor médio obtido das três medidas foram considerados. Para normalidade dos dados foi realizado o teste de Shapiro Wilk. Para diferenças entre os registros, o teste de t student. Resultados: 30 indivíduos (30,33 ± 9,7 anos), 16 mulheres e 14 homens. A medida da mobilidade diafragmática pelo maior valor em comparação ao valor médio apresentou diferença estatisticamente significante (8,11 ± 1,43 cm versus 7,79 ± 1,43 cm; p<0,001). Conclusão: O valor máximo da mobilidade diafragmática foi obtido por meio da análise do maior valor. Ao escolher a média, a mobilidade diafragmática pode ser subestimada. 


Diaphragmatic mobility is essential to pulmonary ventilation. It can be directly measured by using ultrasonography, but the processing of the measurements can be found described differently in the literature. It can be measured as the average of at least three different cycles or from the greatest value among them resticting it to a 10% variation. Thus, there is no consensus about the processing of the maximum measurement of diaphragmatic mobility. Objective: Comparisson of two differents ultrasound measurement processings aiming at the diaphragmatic mobility maximum value. Methodology: Cross-sectional observational study. The diaphragmatic mobility was assessed by ultrasonography with convex transducer (3MHz) placed on the subcostal region between the midclavicular and anterior axillary. In order to explore the right diaphragmatic window and mobility, the B mode was used, followed by the M mode. The participants made maximum inspiration, and the highest value with a maximum difference of 10% was recorded. For statistical analysis, the mean and the highest value of three measurements were considered. The data distribution was analyzed with a Shapiro Wilk test and differences among records by the t student test. Results: 30 participants (30.33 ± 9.7 years) - 16 women and 14 men. The measurement of the diaphragmatic mobility obtained by the highest value compared against the mean value presented a statistically significant difference (8.11 ± 1.43 cm vs 7.79 ± 1.43 cm; p<0.001). Conclusions: The maximum value of diaphragmatic mobility was obtained by the analysis of the highest value. By choosing to use the mean value, diaphragmatic mobility may be underestimated.


Subject(s)
Humans , Male , Female , Adult , Young Adult , Diaphragm/physiology , Respiration , Diaphragm , Cross-Sectional Studies , Ultrasonography , Pulmonary Ventilation , Organ Motion
2.
Journal of Southern Medical University ; (12): 201-206, 2019.
Article in Chinese | WPRIM | ID: wpr-772098

ABSTRACT

Four-dimensional cone beam CT (4D-CBCT) imaging can provide accurate location information of real-time breathing for imaging-guided radiotherapy. How to improve the accuracy of 4D-CBCT reconstruction image is a hot topic in current studies. PICCS algorithm performs remarkably in all 4D-CBCT reconstruction algorithms based on CS theory. The improved PICCS algorithm proposed in this paper improves the prior image on the basis of the traditional PICCS algorithm. According to the location information of each phase, the corresponding prior image is constructed, which completely eliminates the motion blur of the reconstructed image caused by the mismatch of the projection data. Meanwhile, the data fidelity model of the proposed method is consistent with the traditional PICCS algorithm. The experimental results showed that the reconstructed image using the proposed method had a clearer organization boundary compared with that of images reconstructed using the traditional PICCS algorithm. This proposed method significantly reduced the motion artifact and improved the image resolution.


Subject(s)
Humans , Algorithms , Cone-Beam Computed Tomography , Methods , Four-Dimensional Computed Tomography , Image Processing, Computer-Assisted , Organ Motion , Radiographic Image Enhancement , Methods , Respiration
3.
J. bras. pneumol ; 44(1): 5-11, Jan.-Feb. 2018. tab, graf
Article in English | LILACS | ID: biblio-893890

ABSTRACT

ABSTRACT Objective: To compare diaphragmatic mobility, lung function, and respiratory muscle strength between COPD patients with and without thoracic hyperkyphosis; to determine the relationship of thoracic kyphosis angle with diaphragmatic mobility, lung function, and respiratory muscle strength in COPD patients; and to compare diaphragmatic mobility and thoracic kyphosis between male and female patients with COPD. Methods: Participants underwent anthropometry, spirometry, thoracic kyphosis measurement, and evaluation of diaphragmatic mobility. Results: A total of 34 patients with COPD participated in the study. Diaphragmatic mobility was significantly lower in the group of COPD patients with thoracic hyperkyphosis than in that of those without it (p = 0.002). There were no statistically significant differences between the two groups of COPD patients regarding lung function or respiratory muscle strength variables. There was a significant negative correlation between thoracic kyphosis angle and diaphragmatic mobility (r = −0.47; p = 0.005). In the sample as a whole, there were statistically significant differences between males and females regarding body weight (p = 0.011), height (p < 0.001), and thoracic kyphosis angle (p = 0.036); however, there were no significant differences in diaphragmatic mobility between males and females (p = 0.210). Conclusions: Diaphragmatic mobility is lower in COPD patients with thoracic hyperkyphosis than in those without it. There is a negative correlation between thoracic kyphosis angle and diaphragmatic mobility. In comparison with male patients with COPD, female patients with COPD have a significantly increased thoracic kyphosis angle.


RESUMO Objetivo: Comparar a mobilidade diafragmática, a função pulmonar e a força muscular respiratória em pacientes que apresentam DPOC com e sem hipercifose torácica; verificar a relação do ângulo da curvatura torácica com a mobilidade diafragmática, variáveis da função pulmonar e de força muscular respiratória dos pacientes com DPOC; e comparar a mobilidade diafragmática e a cifose torácica entre os gêneros nesses pacientes. Métodos: Foram realizadas as seguintes avaliações: antropometria, espirometria, mensuração do ângulo da curvatura torácica e mobilidade diafragmática. Resultados: Participaram do estudo 34 pacientes com DPOC. No grupo de pacientes com DPOC e hipercifose torácica, a mobilidade diafragmática foi estatisticamente menor quando comparada à do grupo DPOC sem hipercifose torácica (p = 0,002). Não houve diferenças estatisticamente significantes entre esses grupos em relação a variáveis de função pulmonar e de força muscular respiratória. Houve uma correlação negativa significante entre o ângulo da curvatura torácica e a mobilidade diafragmática (r = −0,47; p = 0,005). Quando comparados homens e mulheres da amostra geral, houve diferenças estatisticamente significantes em relação à massa corpórea (p = 0,011), estatura (p < 0,001) e ângulo da curvatura da cifose torácica (p = 0,036), mas não em relação à mobilidade diafragmática (p = 0,210). Conclusões: Os pacientes com DPOC e hipercifose torácica apresentaram menor mobilidade diafragmática quando comparados com os pacientes com DPOC sem hipercifose torácica. O ângulo da curvatura torácica se correlacionou negativamente com a mobilidade diafragmática. O grupo feminino apresentou um aumento significante no ângulo da curvatura torácica quando comparado ao grupo masculino.


Subject(s)
Humans , Male , Female , Middle Aged , Aged , Diaphragm/physiopathology , Pulmonary Disease, Chronic Obstructive/physiopathology , Organ Motion/physiology , Kyphosis/physiopathology , Spirometry , Thoracic Vertebrae/physiopathology , Respiratory Muscles/physiopathology , Diaphragm/diagnostic imaging , Radiography, Thoracic , Sex Factors , Vital Capacity/physiology , Anthropometry , Forced Expiratory Volume/physiology , Cross-Sectional Studies , Statistics, Nonparametric , Pulmonary Disease, Chronic Obstructive/diagnostic imaging , Muscle Strength/physiology , Kyphosis/diagnostic imaging
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