| http://www.w3.org/ns/prov#value | - A commonly used medical gas which is used for insufflation is carbon dioxide; however, the present invention is usable with other gas including air, nitrous oxide, argon, helium or mixture of gases. [0028] In the system shown, a medical gas under pressure flows through a pressure regulator or insufflator (not shown) and into an elongated tube 21 and into a shutoff valve 24 which has an open and cl
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