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Vol. 44. Issue 10.
Pages 540-545 (January 2008)
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Vol. 44. Issue 10.
Pages 540-545 (January 2008)
Original Articles
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Saccharin Test for the Study of Mucociliary Clearance: Reference Values for a Spanish Population
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Pedro Plaza Valíaa,
Corresponding author
ppv01v@saludalia.com

Correspondence: Dr P. Plaza Valía Servicio de Neumología, Hospital Universitario Dr. Peset Gaspar Aguilar, 90 46017 Valencia, Spain
, Francisco Carrión Valerob, Julio Marín Pardob, Daniel Bautista Renteroc, Carmen González Monted
a Servicio de Neumología, Hospital Universitario Dr. Peset, Valencia, Spain
b Servicio de Neumología, Hospital Clínico Universitario, Valencia, Spain
c Servicio de Medicina Preventiva, Hospital Dr. Peset, Valencia, Spain
d Servicio de Medicina Preventiva, Hospital de Sagunto, Sagunto, Valencia, Spain
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Objective

Mucociliary transport is an important defense mechanism for the airways. The aim of this study was to establish reference values for nasal mucociliary clearance time (MCT) by means of the saccharin test.

Subjects and Methods

A cross-sectional, descriptive, observational study was performed. The variables studied were nasal MCT, age, and sex. We included 249 healthy nonsmokers (134 male and 115 female subjects) aged over 10 years and stratified the sample by age. To establish reference values, percentiles were calculated and lower and upper limits of normal were established at the 2.5 and 97.5 percentiles, respectively. The association between nasal MCT and the main study variables was then investigated along with the reproducibility of the test.

Results

The following values for nasal MCT were obtained for the sample as a whole: mean (SD), 17.17 (8.43) minutes; median (interquartile range), 16 minutes (12-20 minutes), indicating that the central 50% of the sample fell within this 8-minute range; and maximum and minimum values of 4 to 54 minutes (range, 50 minutes). The upper and lower limits of normal were 6 and 36 minutes, respectively. In addition, it is noteworthy that only 6 subjects had a nasal MCT longer than 36 minutes. No significant differences between male and female subjects were found. Nasal MCT showed a positive correlation with age (ρ=0.324; P=.0001). No significant differences were observed in the reproducibility test (P=.208).

Conclusions

In addition to facilitating reliable data on mucociliary function, the saccharin test is easy to do, inexpensive, and reproducible. The data obtained from this study should allow the results of this test to be correctly interpreted for a given subject's age and so facilitate its use in clinical practice.

Key words:
Saccharin test
Mucociliary clearance
Reference values
Objetivo

El transporte mucociliar es un importante mecanismo de defensa de las vías respiratorias. El objetivo de este estudio ha sido obtener los valores de referencia del tiempo de transporte mucociliar nasal (TTMCN) mediante el test de la sacarina.

Sujetos Y Métodos

Se ha realizado un estudio observacional, transversal y descriptivo. Las variables estudiadas fueron el TTMCN, la edad y el sexo. Se incluyó a 249 sujetos (134 varones y 115 mujeres) mayores de 10 años, sanos y no fumadores, que se asignaron a grupos según su edad. Para el análisis predictivo de los valores de normalidad se obtuvieron los percentiles, estableciendo los límites de referencia por los percentiles 2,5 y 97,5. Se analizó la asociación entre el TTMCN y las variables principales. Se estudió asimismo la reproducibilidad del test.

Resultados

Del análisis global de la muestra destacan los siguientes datos: mediana de 16 min; media ± desviación estándar de 17,17 ± 8,43 min; rango de 50 min (4-54); límites de referencia de 6-36 min, y amplitud intercuartílica de 8 min (un 50% central de la muestra entre 12 y 20 min). Es asimismo reseñable que sólo 6 sujetos tuvieron un TTMCN superior a 36 min. No se encontraron diferencias significativas entre varones y mujeres. El TTMCN mostró una correlación positiva con la edad (rs = 0,324; p = 0,0001). No se observaron diferencias significativas (p = 0,208) en la prueba de reproducibilidad.

Conclusiones

El test de la sacarina es fácil de realizar, económico y reproducible, y facilita datos fiables de la función mucociliar. Los datos obtenidos en este trabajo permiten la correcta interpretación de los resultados de esta prueba según la edad del sujeto, lo que facilitará su uso.

Palabras clave:
Test de la sacarina
Aclaramiento mucociliar
Valores de referencia
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