Dry Powder and Budesonide Inhalation Suspension Deposition Rates in Asthmatic Airway-Obstruction Regions

Table 1

Dimensions of human model A (Source: annals of the ICRP). Weibel anatomy data. According to the bronchial generation, which shows number per generation, diameter, length, total cross section and total volume.

	Generation	Number per generation	Diameter (cm)	Length (cm)	Total cross-section (cm^2)	Total volume (cm^3)
Broncus	0	1	1.8	12	2.54	30.5
Primary bronchi	1	2	1.22	4.76	2.33	11.25
	2	4	0.83	1.9	2.13	3.97
	3	8	0.56	0.76	2	1.52
	4	16	0.45	1.27	2.48	3.46
Bronchiole	5	32	0.35	1.07	3.11	3.3
	6	64	0.28	0.9	3.96	3.53
	7	128	0.23	0.76	4.1	3.85
	8	256	0.186	0.64	6.95	4.45
	9	512	0.154	0.54	9.65	5.17
	10	1024	0.13	0.46	13.4	6.31
	11	2048	0.109	0.39	19.6	7.56
	12	4096	0.095	0.33	28.8	9.82
	13	8192	0.082	0.27	44.5	12.45
	15	16384	0.074	0.23	69.4	16.4
	15	32768	0.066	0.2	113	21.7
	16	65536	0.06	0.165	180	29.7
Respiratory bronchiole	17	131072	0.054	0.141	300	41.8
	18	262144	0.05	0.117	534	61.1
	19	524288	0.047	0.099	944	93.2
Alveolus	20	1048576	0.045	0.083	1600	139.5
	21	2097152	0.043	0.076	3220	224.3
	22	4194304	0.041	0.059	5880	350
	23	8388608	0.041	0.05	11800	591