[Etiology of nonspecific chronic cough in children and relationship between TRPV1 gene polymorphisms and nonspecific chronic cough].

Objective: To explore the causes of nonspecific chronic cough in children and relationship between transient receptor potential vanilloid 1 (TRPV1) gene polymorphisms and nonspecific chronic cough.

Methods: A total of 195 children with chronic cough were followed up half a month, one month and three months after their first visit to hospital. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to examine polymorphisms of the TRPV1 gene in the children.

[Proportion of incidence of etiological agents in children with non-specific chronic cough in Chongqing: a follow-up study].

Objective: To investigate the proportion of incidence of children with non-specific chronic cough in Chongqing and analyze the characteristics of etiology during the follow-up.

Method: Diagnostic criteria were defined for children with non-specific chronic cough according to the Guidelines of diagnosis and therapy for children with chronic cough that were formulated by the Subspecialty Group, Society of Pediatrics, Chinese Medical Association and Chinese Journal of Pediatrics in 2008. Totally 266 patients in whom cough was the main or the only symptom,lasting > 4 weeks, presenting to Asthma Center of Children's Hospital, Chongqing Medical University between June 2008 and April 2009 were recruited into this study.

[Analysis of 53 cases with bronchoscopically confirmed pediatric tracheobronchomalacia].

Objective: Tracheobronchomalacia is one of the common respiratory tract dysplasia in children. Its symptoms are nonspecific, and routine methods are unreliable in the assessment of tracheobronchomalacia in children. In addition, many physicians are confused about its clinical characteristics, so tracheobronchomalacia is often underdiagnosed.