Objective To investigate the efficacy of fluticasone propionate aerosol (flixotide) versus budesonide suspension in the treatment of recurrent wheezing caused by bronchiolitis. Methods A total of 214 infants with newly diagnosed bronchiolitis were randomly divided into flixotide treatment (106 infants) and budesonide treatment groups (108 infants), and were given aerosol inhalation of flixotide or budesonide for 3 months after achieving remission of clinical symptoms. Another 136 infants with bronchiolitis who did not receive regular inhalation of corticosteroid after achieving remission of clinical symptoms were enrolled as the control group. The follow-up visits were performed for 1 year, and the effects of the two therapeutic methods on recurrent wheezing were evaluated. Results Compared with the control group, both the flixotide and budesonide treatment groups had significantly fewer times of wheezing episodes within 1 year and a significantly lower recurrence rate of wheezing within the first 3 months after regular inhalation of corticosteroid, but no significant differences were observed between the two treatment groups. The amount of corticosteroid inhaled and hospital costs in the budesonide treatment group were significantly higher than in the flixotide treatment group (P<0.01). Conclusions Continuous inhalation of flixotide or budesonide after remission of clinical symptoms in children with bronchiolitis can reduce wheezing episodes and the recurrence of wheezing, and flixotide treatment is superior to budesonide treatment in the aspects of hospital costs and the amount of corticosteroid used.
Objective To establish the patent ductus arteriosus model in preterm rats using the improved natural development method. Methods In the light of the flaws of the natural development method in establishing the patent ductus arteriosus model, the experimental technology was modified to avoid the influence of fixation, dehydration, and section method on blood vessel diameter. Cesarean section was performed for a Wistar rat pregnant for 19 days, and 8 neonatal rats were obtained. After they were sacrificed by dislocation, they were embedded as a whole to avoid dehydration, and the microsection and horizontal section were made. After hematoxylin and eosin staining, a microscope was used to measure the inner diameters of the ductus arteriosus, the main pulmonary artery, and the descending aorta. Results After the cesarean section for the rat pregnant for 19 days, patent ductus arteriosus occurred in all the 8 neonatal rats. The measurements of the inner diameters of blood vessels were as follows: the long diameter and short diameter of the descending aorta were 354±106 and 182±140 μm, respectively; the short diameter of the ductus arteriosus was 155±122 μm, and its area was 36 847±42 582 μm2; the long axis and short axis of the main pulmonary artery were 589±150 and 174±170 μm, respectively. Conclusions The improved natural development method can help to successfully establish the patent ductus arteriosus model in preterm rats.