Objective To compare the differences of flow and volume responses in patients with mild to very severe chronic obstructive pulmonary disease（COPD） in bronchodilatation test. Methods The different changes of FEV1 and FVC in 217 patients with mild to very severe COPD（GOLD stage Ⅱ-Ⅳ） after inhaling salbutamol were analyzed retrospectively. Results FEV1 and FVC of the patients with COPD at stage Ⅱ-Ⅳ increased remarkably after inhaling β2 agonist，while there were significant differences between the changes of FEV1 and FVC. Increment of FEV1 and FVC (ΔFEV1 and ΔFVC)，representing flow and volume responses respectively，showed a normal distribution. The majority of patients fell in the range of ΔFEV1 from 0.00 to 0.04，0.05 to 0.09 and 0.10 to 0.14 liter，and ΔFVC from 0.00 to 0.09，0.10 to 0.19 and 0.20 to 0.29 liter. There was significant difference of ΔFEV1 among stage Ⅱ-Ⅳ patients with COPD （Plt;0.01），namely more severe the disease less ΔFEV1 got.In the other hand ΔFVC increased along with the progression of COPD，although no significant difference of ΔFVC among stage Ⅱ-Ⅳ patients with COPD was found. Though different changes of ΔFEV1 and ΔFVC were revealed，there was a positive correlation between ΔFEV1 and ΔFVC in patients at each GOLD stage and the correlation became more insignificant with the progression of COPD. Conclusions There are significant differences between post-bronchodilator flow and volume responses in patients with COPD.Flow response decreases remarkably along with the progression of COPD，whereas volume response increases along with the progression of COPD.
Objective To explore the clinical features and diagnostic procedure of atypical asthma characteristic of chest pain.Methods The patients with unexplained chest pain were screened by lung function test and bronchial provocation test.The diagnosis of asthma was established by therapeutic test and exclusive procedure.The clinical manifestations were analyzed.Results In 56 cases of unexplained chest pain 20 cases were diagnosed as asthma.While all patients referred to clinic with chest pain as chief complaint，a majority of patients (11 cases，85%) showed obscure chest tightness，breath shortness and cough..Some cases reported the same trigger factors as asthma.Chest pain was relieved in all cases after regular antiasthma treatments.Conclusions Chest pain could be a specific presentation of asthma which may be misdiagnosed as other diseases.Bronchial provocation tests and antiasthma therapy should be considered to screen and diagnose this atypical asthma.
Objective To investigate the application and long-termresults of epiglottic in reconstruction of the traumatic laryngotracheal stenosis.Methods From January 1988 to February 2002, 42 patients with traumatic laryngotracheal stenosis were treated, including 33 laryngeal stenosis and9 laryngotracheal stenosis. The following surgical treatment were performed: ① lowered epiglottic andbi-pedicled sternohyoid myofascial flap and ② lowered epiglottic and bipedicledsternohyoid myofascial flap and sternocleidomastoideus clavicle membrane flap. Results Thirty-seven patients(88.1%) were successfully decannulated 10 to 75 daysafter operation. Feeding tube lasted from 9 to 24 days, all the patients rehabilitated deglutition after surgery. The time of using stent was 9 to 19 days in 25cases.All patients were followed up 1 year to 3 years and 4 months. The function of larynx recovered completely in 37 decannulated patients and partially in 5cannulated patients. Conclusion Epiglottic- has the advantages of easy gain, high antiinfection and survival rate, and stable structure. A combination of epiglottic and the bipedicled sternohyoid myofascial flap plus sternocleidomastoideus clavicle membrane flap can repair large laryngeal and tracheal defects.