Objective: To explore the value and attentions of inspiratory cardiac broadening in airway obstruction of the children. Methods: To evaluate the accuracy of fluoroscopy

fluoroscopy and endoscopy were performed in 45 cases of suspicious tracheal and multiple located foreign bodies. To eveluate the cardiac broadening during inspiration

40 asthmatic children and 40 crying healthy children had fluoroscopy as well. Results: 29 cases were positive (true 24

false 5) and 16 cases were negative (true 2

false 14) in 45 cases of the suspicious tracheal and multiple located foreign bodies. The accuracy was 57.8%

sensitivity was 63.2%

specificity was 28.6% and positive predictive value was 82.6% in fluoroscopy. Inspiratory cardiac broadening was 60% in asthmatic children and 100% in crying healthy children. Conclusion:Fluoroscopy has a higher sensitivity and a low specificity for tracheal and multiple located foreign body aspiration

and the attention must be paid to avoid deep cry during fluoroscopy

in estimating the inspiratory cardiac broadening.