[The experimental study on improved cuirass-respirator].
OBJECTIVE
To study the factors that possibly affect the ventilatory efficiency of cuirass-respirator.


METHODS
Cuirass shells were constructed with plaster casts according to the shape of dog's chest wall. Above the cuirass shell, two straps were added in order to hold the cuirass shell when the pump generated pressure. Tidal volume and Pab and Pes were measured during different negative pressure. In addition, tidal volume was recorded before and after the cuirass was held.


RESULTS
Ventilatory efficiency was markedly raised after the cuirass was held. As negative pressure rose, ventilation increased and Pdi decreased.


CONCLUSIONS
The improved cuirass respirator can markedly improve ventilatory efficiency.
Li
Y
Y
Institute of Pulmonary Medicine, Zhongshan Hospital, Shanghai Medical University, Shanghai 200032.
Niu
S
S
Zhu
L
L
D000399:Air Pressure; D000818:Animals; D004285:Dogs; D008168:Lung / Q000502:physiology*; D011653:Pulmonary Diffusing Capacity; D015919:Ventilators, Negative-Pressure