Pulmonary physiotherapy in the pediatric age group.

In spite of the widespread clinical impression that pulmonary physical therapy, including 
breathing exercises, is helpful in the pediatric age group, objective demonstration 
of the value of the various maneuvers is for the most 
part lacking. There is evidence that the volume of sputum produced 
over short periods of time in patients with cystic fibrosis is 
increased when cough is accompanied by postural drainage and pulmonary physical 
therapy, but the long-term effect of the various maneuvers on the 
course of the chronic pulmonary disease remains unknown. 