Fig. 7

Artificial airway-lung mechanical ventilation model. a Plot for the artificial airway-lung mechanical ventilation model showing the artificial mucus weights in the ETTs grouped by section along the tube length. b The proximal section was 1–4 cm from the top of the ETT, the middle section was 12–15 cm from the top of the ETT, and the distal section was 22–25 cm from the top of the ETT. c, d Different sections of PVC-ETT and CS-AgNPs@PAAm-Gelatin-ETT artificial mucus accumulation after mechanical ventilation for 48 h. e, f Different sections of PVC-ETT and CS-AgNPs@PAAm-Gelatin-ETT artificial mucus accumulation after mechanical ventilation for 72 h. All data are expressed as means ± SD (n = 3)