Figure 1.

The device consists of a full-face mask, a 3-D printing connect, and a standard nebulizer (Fig. 1A). Fig. 1B demonstrates the frontal and lateral views of the mask. The newly designed inlet (Fig. 1C, arrowhead) renders a shorter oxygen supply pathway. Nebulized medications are concentrated inside the mouth space of the mask (Fig. 1C, long arrow). The contaminated air is only allowed to pass out via the top orifice of the mask (Fig. 1C, short arrow).