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Rev. chil. enferm. respir ; 24(1): 20-26, mar. 2008. ilus, tab
Article in Spanish | LILACS | ID: lil-491772

ABSTRACT

Introduction: Cystic fibrosis (CF) patients develop a progressive impairment of pulmonary function tests (PFT) by recurrent infection. Objective: To evaluate PFT in CF patients using spirometry, oxygen saturometry (Sa0(2)) and whole plethysmography (WP) for determining possible mathematical relationships. Methods: FVC, FRC, RV, TLC, FEV1, FEF25.75, obtained in 10 CF patients were compared with Zapletal's reference values and with the values obtained in 33 healthy-school children. Results: Mean age 13.6 years-old (range: 9-20). All CF patients had normal Sa0(2), FEV1 was normal in five (four had FEV1 between 65-80 percent), 4 had RV/TLC > 30 percent, 3 had increased FRC and RV/TLC, only one CF patient had WP normal. The average of TLC and RV were higher than reference values and control group (p < 0.05). We found an inverse relationship between FEV1, FEF25-75 and RV/TLC [r = -0.642 (p < 0.05) and r = -0.803 (p < 0.01); respectively]. Conclusion: This study suggests an increase of pulmonary volume in CF patients with not necessarily abnormal spirometry and an inverse mathematical relationship between FEV1, FEF25-75 and RV/TLC.


Introducción: La fibrosis quística (FQ) exhibe un deterioro progresivo de la función pulmonar (FP) asociada a infecciones recurrentes. Objetivo: Evaluar la FP en sujetos con FQ mediante espirometría, saturometría y pletismografía (PG) determinando alguna relación matemática. Pacientes y Métodos: Se identificaron 10 pacientes capaces de realizar CVF, CRF, VR, CPT, VEF1, y FEF25-75 por ciento; comparándose con los valores de Zapletal y de 33 controles sanos. Resultados: Edad promedio 13,6 a±os (rango: 9-20). Sa0(2)y VEF1fueron normales en 10 y 5 sujetos, respectivamente (4 tenían VEF1entre 65-80 por ciento). La PG mostró 4 pacientes con VR/CPT > 30 por ciento, 3 con aumento de CRF y VR/CPT, sólo uno tuvo PG normal. Los promedios de CPT y VR fueron superiores a valores de referencia y controles (p < 0,05). Se encontró una relación inversa entre VEF1y VR/CPT (r = -0,642, p < 0,05) y entre FEF25-75 y VR/CPT (r = -0,803, p < 0,01). Conclusiones: Este estudio sugiere un incremento significativo de los volúmenes pulmonares en pacientes con FQ aún teniendo espirometría normal; así como una relación matemática inversa entre VEF1, FEF25-75 y VR/CPT.


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Cystic Fibrosis/physiopathology , Lung Volume Measurements/methods , Plethysmography, Whole Body , Body Mass Index , Control Groups , Oxygen Consumption/physiology , Forced Expiratory Flow Rates , Forced Expiratory Volume , Nutritional Status , Lung/physiopathology , Reference Values , Retrospective Studies , Spirometry , Vital Capacity
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