Examining lung mechanical strains as influenced by breathing volumes and rates using experimental digital image correlation

Table 1 Specimen characteristics for varying breathing rates

Pig specimen	Weight [g]	Initial lung volume [ml]	Air trapped [ml]	Rate [breaths per minute]	Peak lung volume for 1350 ml applied volume [ml]	Peak pressure for 1350 ml applied volume [psi]
A	789.40	1620	875.28	10	–	–
				15	1215.34	0.40
				20	1197.10	0.45
B	818.96	1485	712.40	10	1215.34	0.36
				15	1199.38	0.42
				20	1185.70	0.46
C	1217.86	2160	1011.08	10	1165.17	0.37
				15	1121.85	0.38
				20	1064.85	0.42
D	783.96	1080	340.42	10	1126.41	0.47
				15	1105.89	0.42
				20	1023.80	0.52
Average	902.55 ± 210.77	1586.25 ± 446.05	734.80 ± 289.89	10	1168.97 ± 44.59	0.4 ± 0.06
				15	1160.62 ± 54.78	0.41 ± 0.02
				20	1117.86 ± 86.68	0.46 ± 0.04

Characteristics, and peak lung volume and pressures at maximum inflation volume at varying breathing rates of 10, 15, and 20 breaths per minute. Lung volume was found to decrease while pressures were found to increase with faster breathing rates

ISSN: 1465-993X