Table 2. Lung mechanics: lactic acid/atropine study.

	Raw baseline values		Maximum response
Lactic acid(0.4 mmol kg−1)	RL(cmH2O ml−1 s)	EL,dyn(cmH2O ml−1 s)	RL(% change)	EL,dyn(% change)
0.2 ml injectate
Saline	0.093 ± 0.010	0.821 ± 0.08	1.5 ± 1.1	1.7 ± 0.4
Intact	0.097 ± 0.0003	1.353 ± 0.002	51.6 ± 6.7*	31.7 ± 2.6*
Post-atropine	0.084 ± 0.001	1.398 ± 0.002	30.9 ± 3.9†	26.4 ± 4.6
0.4 ml injectate
Saline	0.101 ± 0.008	0.779 ± 0.117	3.2 ± 2.0	0.1 ± 0.2
Intact	0.100 ± 0.001	1.171 ± 0.004	49.2 ± 10.9*	25.0 ± 4.5*
Post-atropine	0.091 ± 0.001	1.210 ± 0.004	10.6 ± 4.0†	13.9 ± 4.0

R_L, inspiratory lung resistance; E_L,dyn, dynamic lung elastance.

^*Significantly different from saline (P < 0.05)

^†significantly different from intact (P < 0.05). Values are means ± S.E.M.