The physical parameters of cough: the larynx in a normal single cough.

摘要: Simultaneous recordings of flow rate, air volume, subglottic pressure and acoustic signal were performed on single normal coughs healthy subjects. Sequential changes in resistance at the level larynx power traced by reference to these measured parameters. Successive phases classified according specific dynamic actions. Mean standard deviations critical measurements their correlation matrix obtained with electric computors.The resulting information indicates that traditional description inspiration, compression expiration represents only a superficial image an extremely complicated transient phenomenon. Detailed observations physical parameters reveal important physiologic patterns. Laryngeal control appears paramount importance for production effective cough. The secondary augmentation discourages re-entry expelled substance.The results this investigat...