| 摘要 |
<p>A system utilizing the central vacuum system in a dental opertory to exhaust analgesic or anesthetic gas from a gas administration assembly. The system includes a nosepiece (16) fitting over the nose of a patient, a gas exhaust conduit (12a, 12b) for exhausting gas exhaled by the patient from the nosepiece and a nosepiece jacket (10) and jacket exhaust conduit (14a, 14b) adjacent to the nosepiece (16) for scavenging gas leaking through the facial seal between nosepiece (16) and patient"s face at the edge of the nosepiece (16). </p> |
