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1.
Medicina (B.Aires) ; 63(5/1): 369-376, 2003. ilus, tab, graf
Article in Spanish | LILACS | ID: lil-352699

ABSTRACT

El propósito de presente trabajo fue: 1) relacionar el signo de Hoover SH (+) con diversos paráme tros funcionales (espirometría y volúmenes pulmonares) y radiológicos (radiografias posteroan teriores), 2) caracterizar los cambios en el radio de curvatura y Ia eficiencia dei diafragma, y restablecer relaciones con los parámetros funcionales y radiológicos. Se estudiaron 15 pacientes con EPOC (SH (+), n: 8). El radio de curvatura fue determinado en el hemidiafragma derecho en inspiración y espiración máximas. Los SH(+) se hallaron más severamente obstruidos (VEF1%, p 0.005%) y con mayor atrapamiento aéreo (VR/CPT %, p 0.01). EI radio espiratorio (Re) fue mayor (p 0.05), y su eficiencia (1/Re), fue menor (p 0.05). El VEF1 % correlacionó con el grado de hiperinflación según CPT % (r 0.58, p 0.022) y con el atrapamiento aéreo según VR% (r 0.77, p 0.0008). Los pacientes con menor VEF1% presentaron un Re mayor (r 0. 61, p 0.015) y menor eficiencia diafragmática en spiración (1/Re) de acuerdo a: 1/Re = 0.093 cm ' + 0.0012 cm ' * VEF1 % (r 0.688, p 0.0054). El VEF1 correlacionó con Ia movilidad diafragmática (r 0.71, p 0.003). La PaC02 correlacionó con Ia CPT % (r 0.534, p 0.04), con el VR (r 0.62, p 0.014) y con los parámetros radiológicos de hiperinflación (r 0.546, p 0.035) y atrapamìento aéreo (r 0.528, p 0.043). El SH(+) sugiere obstrucción bronquial severa, aplanamìento dei diafragma, consiguiente aumento dei radio de curvatura, menor movilidad y menor eficiencia.


Subject(s)
Humans , Male , Female , Aged , Diaphragm , Lung Diseases, Obstructive , Respiratory Function Tests , Body Mass Index , Diaphragm , Lung Diseases, Obstructive , Lung Volume Measurements , Respiratory Sounds , Spirometry , Statistics, Nonparametric , Vital Capacity
2.
Medicina (B.Aires) ; 63(5): 369-76, 2003.
Article in Spanish | LILACS, BINACIS | ID: biblio-1165128

ABSTRACT

The purpose of the present study was: 1) to relate the Hoover sign -SH (+)- with several functional (spirometry and lung volumes) and radiographic (AP x-ray) parameters, 2) to characterize the changes in diaphragmatic curvature radius and the efficiency and to establish some relationships with the functional and radiographic parameters. Fifteen patients with COPD (SH (+), n: 8) were studied. The radius was determined in the right hemidiaphragm after maximal inspired and expired x-ray. The SH (+) was found in more severely obstructed patients (FEV1


) and with high degree of air trapping (RV/TLC


, p 0.01). The expiratory radius (Re) was higher (p 0.05), and their efficiency (1/Re), was minor (p 0.05). The FEV1


correlated with the degree of hyperinflation according to TLC


(r -0.58, p 0.022) and with air trapping according to RV


(r -0.77, p 0.0008). The patients with low FEV1


showed high Re (r -0.61, p 0.015) and decreased diaphragmatic efficiency during expiration (1/Re) according to 1/Re = 0.093 cm-1 + 0.0012 cm-1* FEV1


(r 0.688, p 0.0054). The FEV1 correlated with the diaphragmatic movement (r 0.71, p 0.003). The PaCO2 correlated with the TLC


(r 0.534, p 0.04), the RV


(r 0.62, p 0.014) and with the radiographic parameters of hyperinflation (r 0.546, p 0.035) and air trapping (r 0.528, p 0.043). The presence of Hoover sign suggest severe bronchial obstruction, diaphragmatic flattening, increase of curvature radius, decrease of mobility and efficiency.


Subject(s)
Humans , Male , Female , Aged , Diaphragm/physiopathology , Pulmonary Disease, Chronic Obstructive/physiopathology , Respiratory Function Tests , Spirometry , Diaphragm/diagnostic imaging , Radiography , Body Mass Index , Respiratory Sounds , Vital Capacity , Statistics, Nonparametric , Pulmonary Disease, Chronic Obstructive/diagnostic imaging , Lung Volume Measurements
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