#$%^&*AU2017213483A120170831.pdf#####ABSTRACT A surgical mask for administering and/or scavenging medical gases includes a nasal mask and an oral mask that envelops the nasal mask. The nasal mask is secured to the oral mask and may be removable from it.1/10 200 56 1 14 6 30 64 6266 3222 24 28 34 16 12 Fig. 1