Figure 031_5207. Masks used for noninvasive ventilation. A , nasal; B , naso-oral; C , full face ( courtesy of Dr Tadeusz Przybyłowski ); D , helmet. - McMaster Textbook of Internal Medicine

Figure 031_5207.
Masks used for noninvasive ventilation. A, nasal; B, naso-oral; C, full face (courtesy of Dr Tadeusz Przybyłowski); D, helmet.

Figure 031_5207. Masks used for noninvasive ventilation. A , nasal; B , naso-oral; C , full face ( courtesy of Dr Tadeusz Przybyłowski ); D , helmet.