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1.
Rev. chil. enferm. respir ; Rev. chil. enferm. respir;12(3): 151-5, jul.-sept. 1996. ilus, tab
Article in Spanish | LILACS | ID: lil-196135

ABSTRACT

La flujometría es una técnica ampliamente usada en la evaluación del calibre de la vía aérea. El valor del flujo espiratorio máximo (FEM) varía de acuerdo al tipo y marca de flujómetro empleado. Otro factor que podría nducir variabilidad en la medición del FEM es el uso de diferentes modelos de boquillas en un mismo tipo de flujómetro. En el presente estudio participaron 28 escolares sanos, entre 10 y 13 años de edad, a los cuales se les midió el FEM empleando aleatoriamentr tres tipos de boquilla que se proveen indistintamente con los flujómetros mini-Wright: cilíndrica, cónica y plana. La comparación de los datos obtenidos para las tres boquillas se realizó mediante análisis de varianza (ANOVA). Los valores promedio ñ desviación estándar para la boquilla cilíndrica, cónica y plana fueron: 355 ñ 56, 352 ñ 56 1/min. respectivamente. Las diferencias entre los FEM no fueron significativas. En consecuencia, la forma de la boquilla no agrega variabilidad a la medición del FEM en niños sanos


Subject(s)
Humans , Male , Female , Adolescent , Maximal Expiratory Flow Rate/physiology , Mouth Protectors/classification , Rheology/instrumentation , Analysis of Variance , Mouth Protectors/statistics & numerical data , Observer Variation , Rheology , Rheology/statistics & numerical data
2.
Dig Dis Sci ; 38(7): 1175-82, 1993 Jul.
Article in English | MEDLINE | ID: mdl-8325179

ABSTRACT

Measurements of the hemodynamic parameters of the superior mesenteric artery were performed in 18 patients with celiac disease. Ten were studied at the time of diagnosis, when a small bowel biopsy showed a flat mucosa. The remaining eight patients were studied after complete clinical and histological recovery induced by a gluten-free diet. Doppler ultrasound flowmetry was used to measure blood flow in physiological and fasting conditions and after a mixed liquid test meal (Ensure-Plus). The results were compared with those of healthy subjects (N = 7). Mean basal flow was 50% higher in untreated celiac disease patients than in healthy controls and patients with chronic pancreatitis (P = NS). Postprandial mesenteric blood flow was significantly increased (P < 0.002) and delayed in time (P < 0.005) in celiac disease as compared to controls. Successful treatment reduced the mesenteric blood flow in celiac disease to normal values. Our study demonstrates that pathophysiological changes in the small bowel mucosa during the active clinical phase of celiac disease induce an abnormal splanchnic circulation.


Subject(s)
Celiac Disease/physiopathology , Mesenteric Artery, Superior/physiopathology , Splanchnic Circulation , Adult , Analysis of Variance , Celiac Disease/diagnostic imaging , Celiac Disease/diet therapy , Celiac Disease/epidemiology , Eating/physiology , Fasting/physiology , Female , Hemodynamics , Humans , Male , Mesenteric Artery, Superior/diagnostic imaging , Middle Aged , Observer Variation , Rheology/instrumentation , Rheology/methods , Rheology/statistics & numerical data , Time Factors , Ultrasonography
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